Conversion

calculatorpp-core/src/main/java/org/solovyev/android/calculator/Calculator.java

@@ -32,16 +32,26 @@ public interface Calculator extends CalculatorEventContainer, HistoryControl<Cal
     void simplify();
 
     @NotNull
-    CalculatorEventDataId evaluate(@NotNull JsclOperation operation,
+    CalculatorEventData evaluate(@NotNull JsclOperation operation,
                                    @NotNull String expression);
 
     @NotNull
-    CalculatorEventDataId evaluate(@NotNull JsclOperation operation,
+    CalculatorEventData evaluate(@NotNull JsclOperation operation,
                                    @NotNull String expression,
                                    @NotNull Long sequenceId);
 
+    /*
+    **********************************************************************
+    *
+    *                           CONVERSION
+    *
+    **********************************************************************
+    */
+
+    boolean isConversionPossible(@NotNull Generic generic, @NotNull NumeralBase from, @NotNull NumeralBase to);
+
     @NotNull
-    CalculatorEventDataId convert(@NotNull Generic generic, @NotNull NumeralBase to);
+    CalculatorEventData convert(@NotNull Generic generic, @NotNull NumeralBase to);
 
     /*
     **********************************************************************
@@ -51,8 +61,8 @@ public interface Calculator extends CalculatorEventContainer, HistoryControl<Cal
     **********************************************************************
     */
     @NotNull
-    CalculatorEventDataId fireCalculatorEvent(@NotNull CalculatorEventType calculatorEventType, @Nullable Object data);
+    CalculatorEventData fireCalculatorEvent(@NotNull CalculatorEventType calculatorEventType, @Nullable Object data);
 
     @NotNull
-    CalculatorEventDataId fireCalculatorEvent(@NotNull CalculatorEventType calculatorEventType, @Nullable Object data, @NotNull Long sequenceId);
+    CalculatorEventData fireCalculatorEvent(@NotNull CalculatorEventType calculatorEventType, @Nullable Object data, @NotNull Long sequenceId);
 }

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorConversionEventData.java

@@ -0,0 +1,26 @@
+package org.solovyev.android.calculator;
+
+import jscl.NumeralBase;
+import jscl.math.Generic;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * User: Solovyev_S
+ * Date: 24.09.12
+ * Time: 16:45
+ */
+public interface CalculatorConversionEventData extends CalculatorEventData {
+
+    // display state on the moment of conversion
+    @NotNull
+    CalculatorDisplayViewState getDisplayState();
+
+    @NotNull
+    NumeralBase getFromNumeralBase();
+
+    @NotNull
+    NumeralBase getToNumeralBase();
+
+    @NotNull
+    Generic getValue();
+}

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorConversionEventDataImpl.java

@@ -0,0 +1,98 @@
+package org.solovyev.android.calculator;
+
+import jscl.NumeralBase;
+import jscl.math.Generic;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * User: Solovyev_S
+ * Date: 24.09.12
+ * Time: 16:48
+ */
+public class CalculatorConversionEventDataImpl implements CalculatorConversionEventData {
+
+    @NotNull
+    private CalculatorEventData calculatorEventData;
+
+    @NotNull
+    private NumeralBase fromNumeralBase;
+
+    @NotNull
+    private NumeralBase toNumeralBase;
+
+    @NotNull
+    private Generic value;
+
+    @NotNull
+    private CalculatorDisplayViewState displayState;
+
+    private CalculatorConversionEventDataImpl() {
+    }
+
+    @NotNull
+    public static CalculatorConversionEventData newInstance(@NotNull CalculatorEventData calculatorEventData,
+                                                            @NotNull Generic value,
+                                                            @NotNull NumeralBase from,
+                                                            @NotNull NumeralBase to,
+                                                            @NotNull CalculatorDisplayViewState displayViewState) {
+        final CalculatorConversionEventDataImpl result = new CalculatorConversionEventDataImpl();
+
+        result.calculatorEventData = calculatorEventData;
+        result.value = value;
+        result.displayState = displayViewState;
+        result.fromNumeralBase = from;
+        result.toNumeralBase = to;
+
+        return result;
+    }
+
+    @Override
+    public long getEventId() {
+        return calculatorEventData.getEventId();
+    }
+
+    @Override
+    @NotNull
+    public Long getSequenceId() {
+        return calculatorEventData.getSequenceId();
+    }
+
+    @Override
+    public boolean isAfter(@NotNull CalculatorEventData that) {
+        return calculatorEventData.isAfter(that);
+    }
+
+    @Override
+    public boolean isSameSequence(@NotNull CalculatorEventData that) {
+        return calculatorEventData.isSameSequence(that);
+    }
+
+    @Override
+    public boolean isAfterSequence(@NotNull CalculatorEventData that) {
+        return calculatorEventData.isAfterSequence(that);
+    }
+
+    @NotNull
+    @Override
+    public CalculatorDisplayViewState getDisplayState() {
+        return this.displayState;
+    }
+
+    @Override
+    @NotNull
+    public NumeralBase getFromNumeralBase() {
+        return fromNumeralBase;
+    }
+
+    @Override
+    @NotNull
+    public NumeralBase getToNumeralBase() {
+        return toNumeralBase;
+    }
+
+    @Override
+    @NotNull
+    public Generic getValue() {
+        return value;
+    }
+}

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorDisplayImpl.java

@@ -29,7 +29,7 @@ public class CalculatorDisplayImpl implements CalculatorDisplay {
 
     public CalculatorDisplayImpl(@NotNull Calculator calculator) {
         this.calculator = calculator;
-        this.lastCalculatorEventData = CalculatorEventDataImpl.newInstance(CalculatorUtils.createFirstEventDataId());
+        this.lastCalculatorEventData = CalculatorUtils.createFirstEventDataId();
         this.calculator.addCalculatorEventListener(this);
     }
 
@@ -95,15 +95,21 @@ public class CalculatorDisplayImpl implements CalculatorDisplay {
     public void onCalculatorEvent(@NotNull CalculatorEventData calculatorEventData,
                                   @NotNull CalculatorEventType calculatorEventType,
                                   @Nullable Object data) {
-        if (calculatorEventType.isOfType(calculation_result, calculation_failed, calculation_cancelled)) {
+        if (calculatorEventType.isOfType(calculation_result, calculation_failed, calculation_cancelled, conversion_result, conversion_failed)) {
 
             if (calculatorEventData.isAfter(lastCalculatorEventData)) {
                 lastCalculatorEventData = calculatorEventData;
             }
 
             switch (calculatorEventType) {
+                case conversion_failed:
+                    processConversationFailed((CalculatorConversionEventData) calculatorEventData, (ConversionFailure) data);
+                    break;
+                case conversion_result:
+                    processConversationResult((CalculatorConversionEventData)calculatorEventData,  (String)data);
+                    break;
                 case calculation_result:
-                    processCalculationResult((CalculatorEvaluationEventData)calculatorEventData, (CalculatorOutput) data);
+                    processCalculationResult((CalculatorEvaluationEventData) calculatorEventData, (CalculatorOutput) data);
                     break;
                 case calculation_cancelled:
                     processCalculationCancelled((CalculatorEvaluationEventData)calculatorEventData);
@@ -116,6 +122,12 @@ public class CalculatorDisplayImpl implements CalculatorDisplay {
         }
     }
 
+    private void processConversationFailed(@NotNull CalculatorConversionEventData calculatorEventData,
+                                           @NotNull ConversionFailure data) {
+        this.setViewStateForSequence(CalculatorDisplayViewStateImpl.newErrorState(calculatorEventData.getDisplayState().getOperation(), CalculatorMessages.getBundle().getString(CalculatorMessages.syntax_error)), calculatorEventData.getSequenceId());
+
+    }
+
     private void processCalculationFailed(@NotNull CalculatorEvaluationEventData calculatorEventData, @NotNull CalculatorFailure data) {
 
         final CalculatorEvalException calculatorEvalException = data.getCalculationEvalException();
@@ -145,4 +157,14 @@ public class CalculatorDisplayImpl implements CalculatorDisplay {
         final String stringResult = data.getStringResult();
         this.setViewStateForSequence(CalculatorDisplayViewStateImpl.newValidState(calculatorEventData.getOperation(), data.getResult(), stringResult, 0), calculatorEventData.getSequenceId());
     }
+
+    private void processConversationResult(@NotNull CalculatorConversionEventData calculatorEventData, @NotNull String result) {
+        // add prefix
+        if (calculatorEventData.getFromNumeralBase() != calculatorEventData.getToNumeralBase()) {
+            result = calculatorEventData.getToNumeralBase().getJsclPrefix() + result;
+        }
+
+        final CalculatorDisplayViewState displayState = calculatorEventData.getDisplayState();
+        this.setViewStateForSequence(CalculatorDisplayViewStateImpl.newValidState(displayState.getOperation(), displayState.getResult(), result, 0), calculatorEventData.getSequenceId());
+    }
 }

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorEvaluationEventData.java

@@ -8,7 +8,7 @@ import org.solovyev.android.calculator.jscl.JsclOperation;
  * Date: 9/20/12
  * Time: 10:00 PM
  */
-public interface CalculatorEvaluationEventData extends CalculatorEventData{
+public interface CalculatorEvaluationEventData extends CalculatorEventData {
 
     @NotNull
     JsclOperation getOperation();

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorEvaluationEventDataImpl.java

@@ -51,17 +51,17 @@ public class CalculatorEvaluationEventDataImpl implements CalculatorEvaluationEv
     }
 
     @Override
-    public boolean isAfter(@NotNull CalculatorEventDataId that) {
+    public boolean isAfter(@NotNull CalculatorEventData that) {
         return calculatorEventData.isAfter(that);
     }
 
     @Override
-    public boolean isSameSequence(@NotNull CalculatorEventDataId that) {
+    public boolean isSameSequence(@NotNull CalculatorEventData that) {
         return this.calculatorEventData.isSameSequence(that);
     }
 
     @Override
-    public boolean isAfterSequence(@NotNull CalculatorEventDataId that) {
+    public boolean isAfterSequence(@NotNull CalculatorEventData that) {
         return this.calculatorEventData.isAfterSequence(that);
     }
 }

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorEventData.java

@@ -1,10 +1,24 @@
 package org.solovyev.android.calculator;
 
+import org.jetbrains.annotations.NotNull;
+
 /**
  * User: Solovyev_S
  * Date: 20.09.12
- * Time: 16:51
+ * Time: 18:18
  */
-public interface CalculatorEventData extends CalculatorEventDataId {
+public interface CalculatorEventData {
 
+    // the higher id => the later event
+    long getEventId();
+
+    // the higher id => the later event
+    @NotNull
+    Long getSequenceId();
+
+    boolean isAfter(@NotNull CalculatorEventData that);
+
+    boolean isSameSequence(@NotNull CalculatorEventData that);
+
+    boolean isAfterSequence(@NotNull CalculatorEventData that);
 }

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorEventDataId.java

@@ -1,24 +0,0 @@
-package org.solovyev.android.calculator;
-
-import org.jetbrains.annotations.NotNull;
-
-/**
- * User: Solovyev_S
- * Date: 20.09.12
- * Time: 18:18
- */
-public interface CalculatorEventDataId {
-
-    // the higher id => the later event
-    long getEventId();
-
-    // the higher id => the later event
-    @NotNull
-    Long getSequenceId();
-
-    boolean isAfter(@NotNull CalculatorEventDataId that);
-
-    boolean isSameSequence(@NotNull CalculatorEventDataId that);
-
-    boolean isAfterSequence(@NotNull CalculatorEventDataId that);
-}

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorEventDataIdImpl.java

@@ -1,75 +0,0 @@
-package org.solovyev.android.calculator;
-
-import org.jetbrains.annotations.NotNull;
-
-/**
- * User: Solovyev_S
- * Date: 20.09.12
- * Time: 18:18
- */
-class CalculatorEventDataIdImpl implements CalculatorEventDataId {
-
-    private static final long NO_SEQUENCE = -1L;
-
-    private final long eventId;
-
-    @NotNull
-    private Long sequenceId = NO_SEQUENCE;
-
-    private CalculatorEventDataIdImpl(long id, @NotNull Long sequenceId) {
-        this.eventId = id;
-        this.sequenceId = sequenceId;
-    }
-
-    @NotNull
-    static CalculatorEventDataId newInstance(long id, @NotNull Long sequenceId) {
-        return new CalculatorEventDataIdImpl(id, sequenceId);
-    }
-
-    @Override
-    public long getEventId() {
-        return this.eventId;
-    }
-
-    @NotNull
-    @Override
-    public Long getSequenceId() {
-        return this.sequenceId;
-    }
-
-    @Override
-    public boolean isAfter(@NotNull CalculatorEventDataId that) {
-        return this.eventId > that.getEventId();
-    }
-
-    @Override
-    public boolean isSameSequence(@NotNull CalculatorEventDataId that) {
-        return !this.sequenceId.equals(NO_SEQUENCE) && this.sequenceId.equals(that.getSequenceId());
-    }
-
-    @Override
-    public boolean isAfterSequence(@NotNull CalculatorEventDataId that) {
-        return !this.sequenceId.equals(NO_SEQUENCE) && this.sequenceId > that.getSequenceId();
-    }
-
-    @Override
-    public boolean equals(Object o) {
-        if (this == o) return true;
-        if (!(o instanceof CalculatorEventDataIdImpl)) return false;
-
-        CalculatorEventDataIdImpl that = (CalculatorEventDataIdImpl) o;
-
-        if (eventId != that.eventId) return false;
-        if (!sequenceId.equals(that.sequenceId))
-            return false;
-
-        return true;
-    }
-
-    @Override
-    public int hashCode() {
-        int result = (int) (eventId ^ (eventId >>> 32));
-        result = 31 * result + (sequenceId.hashCode());
-        return result;
-    }
-}

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorEventDataImpl.java

@@ -5,46 +5,51 @@ import org.jetbrains.annotations.NotNull;
 /**
  * User: Solovyev_S
  * Date: 20.09.12
- * Time: 16:54
+ * Time: 18:18
  */
 class CalculatorEventDataImpl implements CalculatorEventData {
 
-    @NotNull
+    private static final long NO_SEQUENCE = -1L;
-    private CalculatorEventDataId calculatorEventDataId;
 
-    private CalculatorEventDataImpl(@NotNull CalculatorEventDataId calculatorEventDataId) {
+    private final long eventId;
-        this.calculatorEventDataId = calculatorEventDataId;
+
+    @NotNull
+    private Long sequenceId = NO_SEQUENCE;
+
+    private CalculatorEventDataImpl(long id, @NotNull Long sequenceId) {
+        this.eventId = id;
+        this.sequenceId = sequenceId;
     }
 
     @NotNull
-    public static CalculatorEventData newInstance(@NotNull CalculatorEventDataId calculatorEventDataId) {
+    static CalculatorEventData newInstance(long id, @NotNull Long sequenceId) {
-        return new CalculatorEventDataImpl(calculatorEventDataId);
+        return new CalculatorEventDataImpl(id, sequenceId);
     }
 
     @Override
     public long getEventId() {
-        return calculatorEventDataId.getEventId();
+        return this.eventId;
     }
 
     @NotNull
     @Override
     public Long getSequenceId() {
-        return calculatorEventDataId.getSequenceId();
+        return this.sequenceId;
     }
 
     @Override
-    public boolean isAfter(@NotNull CalculatorEventDataId that) {
+    public boolean isAfter(@NotNull CalculatorEventData that) {
-        return this.calculatorEventDataId.isAfter(that);
+        return this.eventId > that.getEventId();
     }
 
     @Override
-    public boolean isSameSequence(@NotNull CalculatorEventDataId that) {
+    public boolean isSameSequence(@NotNull CalculatorEventData that) {
-        return this.calculatorEventDataId.isSameSequence(that);
+        return !this.sequenceId.equals(NO_SEQUENCE) && this.sequenceId.equals(that.getSequenceId());
     }
 
     @Override
-    public boolean isAfterSequence(@NotNull CalculatorEventDataId that) {
+    public boolean isAfterSequence(@NotNull CalculatorEventData that) {
-        return this.calculatorEventDataId.isAfterSequence(that);
+        return !this.sequenceId.equals(NO_SEQUENCE) && this.sequenceId > that.getSequenceId();
     }
 
     @Override
@@ -54,13 +59,17 @@ class CalculatorEventDataImpl implements CalculatorEventData {
 
         CalculatorEventDataImpl that = (CalculatorEventDataImpl) o;
 
-        if (!calculatorEventDataId.equals(that.calculatorEventDataId)) return false;
+        if (eventId != that.eventId) return false;
+        if (!sequenceId.equals(that.sequenceId))
+            return false;
 
         return true;
     }
 
     @Override
     public int hashCode() {
-        return calculatorEventDataId.hashCode();
+        int result = (int) (eventId ^ (eventId >>> 32));
+        result = 31 * result + (sequenceId.hashCode());
+        return result;
     }
 }

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorEventType.java

@@ -12,6 +12,7 @@ public enum CalculatorEventType {
     /*
     **********************************************************************
     *
+    *                           CALCULATION
     *                           org.solovyev.android.calculator.CalculatorEvaluationEventData
     *
     **********************************************************************
@@ -29,21 +30,27 @@ public enum CalculatorEventType {
 
     calculation_cancelled,
 
-    calculation_finished,
-
     // @NotNull org.solovyev.android.calculator.CalculatorFailure
     calculation_failed,
 
+    calculation_finished,
+
     /*
     **********************************************************************
     *
     *                           CONVERSION
+    *                           CalculatorConversionEventData
     *
     **********************************************************************
     */
     conversion_started,
 
     // @NotNull String conversion result
+    conversion_result,
+
+    // @NotNull ConversionFailure
+    conversion_failed,
+
     conversion_finished,
 
     /*

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorImpl.java

@@ -11,13 +11,12 @@ import org.solovyev.android.calculator.history.CalculatorHistory;
 import org.solovyev.android.calculator.history.CalculatorHistoryState;
 import org.solovyev.android.calculator.jscl.JsclOperation;
 import org.solovyev.android.calculator.text.TextProcessor;
+import org.solovyev.android.calculator.units.CalculatorNumeralBase;
 import org.solovyev.common.history.HistoryAction;
 import org.solovyev.common.msg.MessageRegistry;
 import org.solovyev.common.msg.MessageType;
 import org.solovyev.common.text.StringUtils;
-import org.solovyev.math.units.UnitConverter;
+import org.solovyev.math.units.*;
-import org.solovyev.math.units.UnitImpl;
-import org.solovyev.math.units.UnitType;
 
 import java.util.List;
 import java.util.concurrent.Executor;
@@ -48,41 +47,15 @@ public class CalculatorImpl implements Calculator, CalculatorEventListener {
     }
 
     @NotNull
-    public static String doConversion(@NotNull UnitConverter<String> converter,
+    private CalculatorEventData nextEventData() {
-                                      @Nullable String from,
+        long eventId = counter.incrementAndGet();
-                                      @NotNull UnitType<String> fromUnitType,
+        return CalculatorEventDataImpl.newInstance(eventId, eventId);
-                                      @NotNull UnitType<String> toUnitType) throws ConversionException {
-        final String result;
-
-        if (StringUtils.isEmpty(from)) {
-            result = "";
-        } else {
-
-            String to = null;
-            try {
-                if (converter.isSupported(fromUnitType, toUnitType)) {
-                    to = converter.convert(UnitImpl.newInstance(from, fromUnitType), toUnitType).getValue();
-                }
-            } catch (RuntimeException e) {
-                throw new ConversionException(e);
-            }
-
-            result = to;
-        }
-
-        return result;
     }
 
     @NotNull
-    private CalculatorEventDataId nextEventDataId() {
+    private CalculatorEventData nextEventData(@NotNull Long sequenceId) {
         long eventId = counter.incrementAndGet();
-        return CalculatorEventDataIdImpl.newInstance(eventId, eventId);
+        return CalculatorEventDataImpl.newInstance(eventId, sequenceId);
-    }
-
-    @NotNull
-    private CalculatorEventDataId nextEventDataId(@NotNull Long sequenceId) {
-        long eventId = counter.incrementAndGet();
-        return CalculatorEventDataIdImpl.newInstance(eventId, sequenceId);
     }
 
     /*
@@ -116,10 +89,10 @@ public class CalculatorImpl implements Calculator, CalculatorEventListener {
 
     @NotNull
     @Override
-    public CalculatorEventDataId evaluate(@NotNull final JsclOperation operation,
+    public CalculatorEventData evaluate(@NotNull final JsclOperation operation,
                                           @NotNull final String expression) {
 
-        final CalculatorEventDataId eventDataId = nextEventDataId();
+        final CalculatorEventData eventDataId = nextEventData();
 
         threadPoolExecutor.execute(new Runnable() {
             @Override
@@ -133,8 +106,8 @@ public class CalculatorImpl implements Calculator, CalculatorEventListener {
 
     @NotNull
     @Override
-    public CalculatorEventDataId evaluate(@NotNull final JsclOperation operation, @NotNull final String expression, @NotNull Long sequenceId) {
+    public CalculatorEventData evaluate(@NotNull final JsclOperation operation, @NotNull final String expression, @NotNull Long sequenceId) {
-        final CalculatorEventDataId eventDataId = nextEventDataId(sequenceId);
+        final CalculatorEventData eventDataId = nextEventData(sequenceId);
 
         threadPoolExecutor.execute(new Runnable() {
             @Override
@@ -146,72 +119,6 @@ public class CalculatorImpl implements Calculator, CalculatorEventListener {
         return eventDataId;
     }
 
-    @NotNull
-    @Override
-    public CalculatorEventDataId convert(@NotNull final Generic generic,
-                                         @NotNull final NumeralBase to) {
-        final CalculatorEventDataId eventDataId = nextEventDataId();
-
-        threadPoolExecutor.execute(new Runnable() {
-            @Override
-            public void run() {
-                final Long sequenceId = eventDataId.getSequenceId();
-
-                fireCalculatorEvent(newConversionEventData(sequenceId), CalculatorEventType.conversion_started, null);
-
-                final NumeralBase from = CalculatorLocatorImpl.getInstance().getEngine().getNumeralBase();
-
-                if (from != to) {
-                    String fromString = generic.toString();
-                    if (!StringUtils.isEmpty(fromString)) {
-                        try {
-                            fromString = ToJsclTextProcessor.getInstance().process(fromString).getExpression();
-                        } catch (CalculatorParseException e) {
-                            // ok, problems while processing occurred
-                        }
-                    }
-
-                    // todo serso: continue
-                    //doConversion(AndroidNumeralBase.getConverter(), fromString, AndroidNumeralBase.valueOf(fromString), AndroidNumeralBase.valueOf(to));
-                } else {
-                    fireCalculatorEvent(newConversionEventData(sequenceId), CalculatorEventType.conversion_finished, generic.toString());
-                }
-            }
-        });
-
-        return eventDataId;
-    }
-
-    @NotNull
-    @Override
-    public CalculatorEventDataId fireCalculatorEvent(@NotNull final CalculatorEventType calculatorEventType, @Nullable final Object data) {
-        final CalculatorEventDataId eventDataId = nextEventDataId();
-
-        threadPoolExecutor.execute(new Runnable() {
-            @Override
-            public void run() {
-                fireCalculatorEvent(CalculatorEventDataImpl.newInstance(eventDataId), calculatorEventType, data);
-            }
-        });
-
-        return eventDataId;
-    }
-
-    @NotNull
-    @Override
-    public CalculatorEventDataId fireCalculatorEvent(@NotNull final CalculatorEventType calculatorEventType, @Nullable final Object data, @NotNull Long sequenceId) {
-        final CalculatorEventDataId eventDataId = nextEventDataId(sequenceId);
-
-        threadPoolExecutor.execute(new Runnable() {
-            @Override
-            public void run() {
-                fireCalculatorEvent(CalculatorEventDataImpl.newInstance(eventDataId), calculatorEventType, data);
-            }
-        });
-
-        return eventDataId;
-    }
-
     @Override
     public void init() {
         CalculatorLocatorImpl.getInstance().getEngine().init();
@@ -219,8 +126,12 @@ public class CalculatorImpl implements Calculator, CalculatorEventListener {
     }
 
     @NotNull
-    private CalculatorEventData newConversionEventData(@NotNull Long sequenceId) {
+    private CalculatorConversionEventData newConversionEventData(@NotNull Long sequenceId,
-        return CalculatorEventDataImpl.newInstance(nextEventDataId(sequenceId));
+                                                                 @NotNull Generic value,
+                                                                 @NotNull NumeralBase from,
+                                                                 @NotNull NumeralBase to,
+                                                                 @NotNull CalculatorDisplayViewState displayViewState) {
+        return CalculatorConversionEventDataImpl.newInstance(nextEventData(sequenceId), value, from, to, displayViewState);
     }
 
     private void evaluate(@NotNull Long sequenceId,
@@ -280,7 +191,7 @@ public class CalculatorImpl implements Calculator, CalculatorEventListener {
     private CalculatorEventData newCalculationEventData(@NotNull JsclOperation operation,
                                                         @NotNull String expression,
                                                         @NotNull Long calculationId) {
-        return new CalculatorEvaluationEventDataImpl(CalculatorEventDataImpl.newInstance(nextEventDataId(calculationId)), operation, expression);
+        return new CalculatorEvaluationEventDataImpl(nextEventData(calculationId), operation, expression);
     }
 
     private void handleException(@NotNull Long sequenceId,
@@ -314,6 +225,78 @@ public class CalculatorImpl implements Calculator, CalculatorEventListener {
         fireCalculatorEvent(newCalculationEventData(operation, expression, calculationId), CalculatorEventType.calculation_failed, new CalculatorFailureImpl(evalException));
     }
 
+    /*
+    **********************************************************************
+    *
+    *                           CONVERSION
+    *
+    **********************************************************************
+    */
+
+    @NotNull
+    @Override
+    public CalculatorEventData convert(@NotNull final Generic value,
+                                         @NotNull final NumeralBase to) {
+        final CalculatorEventData eventDataId = nextEventData();
+
+        final CalculatorDisplayViewState displayViewState = CalculatorLocatorImpl.getInstance().getDisplay().getViewState();
+        final NumeralBase from = CalculatorLocatorImpl.getInstance().getEngine().getNumeralBase();
+
+        threadPoolExecutor.execute(new Runnable() {
+            @Override
+            public void run() {
+                final Long sequenceId = eventDataId.getSequenceId();
+
+                fireCalculatorEvent(newConversionEventData(sequenceId, value, from,  to, displayViewState), CalculatorEventType.conversion_started, null);
+                try {
+
+                    final String result = doConversion(value, from, to);
+
+                    fireCalculatorEvent(newConversionEventData(sequenceId, value, from, to, displayViewState), CalculatorEventType.conversion_result, result);
+
+                } catch (ConversionException e) {
+                    fireCalculatorEvent(newConversionEventData(sequenceId, value, from, to, displayViewState), CalculatorEventType.conversion_failed, new ConversionFailureImpl(e));
+                }
+            }
+        });
+
+        return eventDataId;
+    }
+
+    @NotNull
+    private static String doConversion(@NotNull Generic generic,
+                                       @NotNull NumeralBase from,
+                                       @NotNull NumeralBase to) throws ConversionException {
+        final String result;
+
+        if (from != to) {
+            String fromString = generic.toString();
+            if (!StringUtils.isEmpty(fromString)) {
+                try {
+                    fromString = ToJsclTextProcessor.getInstance().process(fromString).getExpression();
+                } catch (CalculatorParseException e) {
+                    // ok, problems while processing occurred
+                }
+            }
+
+            result = ConversionUtils.doConversion(CalculatorNumeralBase.getConverter(), fromString, CalculatorNumeralBase.valueOf(from), CalculatorNumeralBase.valueOf(to));
+        } else {
+            result = generic.toString();
+        }
+
+        return result;
+    }
+
+    @Override
+    public boolean isConversionPossible(@NotNull Generic generic, NumeralBase from, @NotNull NumeralBase to) {
+        try {
+            doConversion(generic, from, to);
+            return true;
+        } catch (ConversionException e) {
+            return false;
+        }
+    }
+
     /*
     **********************************************************************
     *
@@ -342,6 +325,44 @@ public class CalculatorImpl implements Calculator, CalculatorEventListener {
         calculatorEventContainer.fireCalculatorEvents(calculatorEvents);
     }
 
+    @NotNull
+    @Override
+    public CalculatorEventData fireCalculatorEvent(@NotNull final CalculatorEventType calculatorEventType, @Nullable final Object data) {
+        final CalculatorEventData eventData = nextEventData();
+
+        threadPoolExecutor.execute(new Runnable() {
+            @Override
+            public void run() {
+                fireCalculatorEvent(eventData, calculatorEventType, data);
+            }
+        });
+
+        return eventData;
+    }
+
+    @NotNull
+    @Override
+    public CalculatorEventData fireCalculatorEvent(@NotNull final CalculatorEventType calculatorEventType, @Nullable final Object data, @NotNull Long sequenceId) {
+        final CalculatorEventData eventData = nextEventData(sequenceId);
+
+        threadPoolExecutor.execute(new Runnable() {
+            @Override
+            public void run() {
+                fireCalculatorEvent(eventData, calculatorEventType, data);
+            }
+        });
+
+        return eventData;
+    }
+
+    /*
+    **********************************************************************
+    *
+    *                           EVENTS HANDLER
+    *
+    **********************************************************************
+    */
+
     @Override
     public void onCalculatorEvent(@NotNull CalculatorEventData calculatorEventData, @NotNull CalculatorEventType calculatorEventType, @Nullable Object data) {
 
@@ -362,6 +383,14 @@ public class CalculatorImpl implements Calculator, CalculatorEventListener {
         }
     }
 
+    /*
+    **********************************************************************
+    *
+    *                           HISTORY
+    *
+    **********************************************************************
+    */
+
     @Override
     public void doHistoryAction(@NotNull HistoryAction historyAction) {
         final CalculatorHistory history = CalculatorLocatorImpl.getInstance().getHistory();
@@ -378,28 +407,27 @@ public class CalculatorImpl implements Calculator, CalculatorEventListener {
         editorHistoryState.setValuesFromHistory(getEditor(), getDisplay());
     }
 
-    @NotNull
-    private CalculatorEditor getEditor() {
-        return CalculatorLocatorImpl.getInstance().getEditor();
-    }
-
     @NotNull
     @Override
     public CalculatorHistoryState getCurrentHistoryState() {
         return CalculatorHistoryState.newInstance(getEditor(), getDisplay());
     }
 
+    /*
+    **********************************************************************
+    *
+    *                           OTHER
+    *
+    **********************************************************************
+    */
+
+    @NotNull
+    private CalculatorEditor getEditor() {
+        return CalculatorLocatorImpl.getInstance().getEditor();
+    }
+
     @NotNull
     private CalculatorDisplay getDisplay() {
         return CalculatorLocatorImpl.getInstance().getDisplay();
     }
-
-    public static final class ConversionException extends Exception {
-        private ConversionException() {
-        }
-
-        private ConversionException(Throwable throwable) {
-            super(throwable);
-        }
-    }
 }

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorUtils.java

@@ -16,7 +16,7 @@ public final class CalculatorUtils {
     }
 
     @NotNull
-    public static CalculatorEventDataId createFirstEventDataId() {
+    public static CalculatorEventData createFirstEventDataId() {
-        return CalculatorEventDataIdImpl.newInstance(FIRST_ID, FIRST_ID);
+        return CalculatorEventDataImpl.newInstance(FIRST_ID, FIRST_ID);
     }
 }

calculatorpp-core/src/main/java/org/solovyev/android/calculator/ConversionFailure.java

@@ -0,0 +1,14 @@
+package org.solovyev.android.calculator;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * User: Solovyev_S
+ * Date: 24.09.12
+ * Time: 16:12
+ */
+public interface ConversionFailure {
+
+    @NotNull
+    Exception getException();
+}

calculatorpp-core/src/main/java/org/solovyev/android/calculator/ConversionFailureImpl.java

@@ -0,0 +1,24 @@
+package org.solovyev.android.calculator;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * User: Solovyev_S
+ * Date: 24.09.12
+ * Time: 16:12
+ */
+public class ConversionFailureImpl implements ConversionFailure {
+
+    @NotNull
+    private Exception exception;
+
+    public ConversionFailureImpl(@NotNull Exception exception) {
+        this.exception = exception;
+    }
+
+    @NotNull
+    @Override
+    public Exception getException() {
+        return this.exception;
+    }
+}

calculatorpp-core/src/main/java/org/solovyev/android/calculator/history/CalculatorHistoryImpl.java

@@ -32,7 +32,7 @@ public class CalculatorHistoryImpl implements CalculatorHistory {
     private final List<CalculatorHistoryState> savedHistory = new ArrayList<CalculatorHistoryState>();
 
     @NotNull
-    private volatile CalculatorEventDataId lastEventDataId = CalculatorUtils.createFirstEventDataId();
+    private volatile CalculatorEventData lastEventDataId = CalculatorUtils.createFirstEventDataId();
 
     @Nullable
     private volatile CalculatorEditorViewState lastEditorViewState;

calculatorpp-core/src/main/java/org/solovyev/android/calculator/units/CalculatorNumeralBase.java

@@ -0,0 +1,99 @@
+package org.solovyev.android.calculator.units;
+
+import jscl.NumeralBase;
+import org.jetbrains.annotations.NotNull;
+import org.solovyev.math.units.Unit;
+import org.solovyev.math.units.UnitConverter;
+import org.solovyev.math.units.UnitImpl;
+import org.solovyev.math.units.UnitType;
+
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * User: Solovyev_S
+ * Date: 24.09.12
+ * Time: 16:05
+ */
+public enum CalculatorNumeralBase implements UnitType<String> {
+
+
+    bin(NumeralBase.bin),
+
+    oct(NumeralBase.oct),
+
+    dec(NumeralBase.dec),
+
+    hex(NumeralBase.hex);
+
+    @NotNull
+    private final NumeralBase numeralBase;
+
+    private CalculatorNumeralBase(@NotNull NumeralBase numeralBase) {
+        this.numeralBase = numeralBase;
+    }
+
+    @NotNull
+    public NumeralBase getNumeralBase() {
+        return numeralBase;
+    }
+
+    @NotNull
+    private static final CalculatorNumeralBase.Converter converter = new CalculatorNumeralBase.Converter();
+
+    @NotNull
+    public static CalculatorNumeralBase.Converter getConverter() {
+        return converter;
+    }
+
+    @NotNull
+    @Override
+    public Class<String> getUnitValueClass() {
+        return String.class;
+    }
+
+    @NotNull
+    public Unit<String> createUnit(@NotNull String value) {
+        return UnitImpl.newInstance(value, this);
+    }
+
+    public static class Converter implements UnitConverter<String> {
+
+        private Converter() {
+        }
+
+        @Override
+        public boolean isSupported(@NotNull UnitType<?> from, @NotNull UnitType<String> to) {
+            return CalculatorNumeralBase.class.isAssignableFrom(from.getClass()) && CalculatorNumeralBase.class.isAssignableFrom(to.getClass());
+        }
+
+        @NotNull
+        @Override
+        public Unit<String> convert(@NotNull Unit<?> from, @NotNull UnitType<String> toType) {
+            if (!isSupported(from.getUnitType(), toType)) {
+                throw new IllegalArgumentException("Types are not supported!");
+            }
+
+            final CalculatorNumeralBase fromTypeAndroid = (CalculatorNumeralBase) from.getUnitType();
+            final NumeralBase fromNumeralBase = fromTypeAndroid.numeralBase;
+            final NumeralBase toNumeralBase = ((CalculatorNumeralBase) toType).numeralBase;
+            final String fromValue = (String) from.getValue();
+
+            final BigInteger decBigInteger = fromNumeralBase.toBigInteger(fromValue);
+            return UnitImpl.newInstance(toNumeralBase.toString(decBigInteger), toType);
+        }
+    }
+
+    @NotNull
+    public static CalculatorNumeralBase valueOf(@NotNull NumeralBase nb) {
+        for (CalculatorNumeralBase calculatorNumeralBase : values()) {
+            if (calculatorNumeralBase.numeralBase == nb) {
+                return calculatorNumeralBase;
+            }
+        }
+
+        throw new IllegalArgumentException(nb + " is not supported numeral base!");
+    }
+}

calculatorpp-core/src/main/java/org/solovyev/math/units/ConversionException.java

@@ -0,0 +1,15 @@
+package org.solovyev.math.units;
+
+/**
+* User: Solovyev_S
+* Date: 24.09.12
+* Time: 16:01
+*/
+public final class ConversionException extends Exception {
+    public ConversionException() {
+    }
+
+    public ConversionException(Throwable throwable) {
+        super(throwable);
+    }
+}

calculatorpp-core/src/main/java/org/solovyev/math/units/ConversionUtils.java

@@ -0,0 +1,38 @@
+package org.solovyev.math.units;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.solovyev.common.text.StringUtils;
+
+/**
+ * User: Solovyev_S
+ * Date: 24.09.12
+ * Time: 16:01
+ */
+public class ConversionUtils {
+    @NotNull
+    public static String doConversion(@NotNull UnitConverter<String> converter,
+                                      @Nullable String from,
+                                      @NotNull UnitType<String> fromUnitType,
+                                      @NotNull UnitType<String> toUnitType) throws ConversionException {
+        final String result;
+
+        if (StringUtils.isEmpty(from)) {
+            result = "";
+        } else {
+
+            String to = null;
+            try {
+                if (converter.isSupported(fromUnitType, toUnitType)) {
+                    to = converter.convert(UnitImpl.newInstance(from, fromUnitType), toUnitType).getValue();
+                }
+            } catch (RuntimeException e) {
+                throw new ConversionException(e);
+            }
+
+            result = to;
+        }
+
+        return result;
+    }
+}

calculatorpp/src/main/java/org/solovyev/android/calculator/AndroidCalculator.java

@@ -44,31 +44,36 @@ public class AndroidCalculator implements Calculator {
 
     @Override
     @NotNull
-    public CalculatorEventDataId evaluate(@NotNull JsclOperation operation, @NotNull String expression) {
+    public CalculatorEventData evaluate(@NotNull JsclOperation operation, @NotNull String expression) {
         return calculator.evaluate(operation, expression);
     }
 
     @Override
     @NotNull
-    public CalculatorEventDataId evaluate(@NotNull JsclOperation operation, @NotNull String expression, @NotNull Long sequenceId) {
+    public CalculatorEventData evaluate(@NotNull JsclOperation operation, @NotNull String expression, @NotNull Long sequenceId) {
         return calculator.evaluate(operation, expression, sequenceId);
     }
 
+    @Override
+    public boolean isConversionPossible(@NotNull Generic generic, @NotNull NumeralBase from, @NotNull NumeralBase to) {
+        return calculator.isConversionPossible(generic, from, to);
+    }
+
     @Override
     @NotNull
-    public CalculatorEventDataId convert(@NotNull Generic generic, @NotNull NumeralBase to) {
+    public CalculatorEventData convert(@NotNull Generic generic, @NotNull NumeralBase to) {
         return calculator.convert(generic, to);
     }
 
     @Override
     @NotNull
-    public CalculatorEventDataId fireCalculatorEvent(@NotNull CalculatorEventType calculatorEventType, @Nullable Object data) {
+    public CalculatorEventData fireCalculatorEvent(@NotNull CalculatorEventType calculatorEventType, @Nullable Object data) {
         return calculator.fireCalculatorEvent(calculatorEventType, data);
     }
 
     @Override
     @NotNull
-    public CalculatorEventDataId fireCalculatorEvent(@NotNull CalculatorEventType calculatorEventType, @Nullable Object data, @NotNull Long sequenceId) {
+    public CalculatorEventData fireCalculatorEvent(@NotNull CalculatorEventType calculatorEventType, @Nullable Object data, @NotNull Long sequenceId) {
         return calculator.fireCalculatorEvent(calculatorEventType, data, sequenceId);
     }
 

calculatorpp/src/main/java/org/solovyev/android/calculator/AndroidNumeralBase.java

@@ -3,14 +3,10 @@ package org.solovyev.android.calculator;
 import android.app.Activity;
 import jscl.NumeralBase;
 import org.jetbrains.annotations.NotNull;
-import org.solovyev.math.units.Unit;
+import org.solovyev.android.calculator.units.CalculatorNumeralBase;
-import org.solovyev.math.units.UnitConverter;
-import org.solovyev.math.units.UnitImpl;
-import org.solovyev.math.units.UnitType;
 import org.solovyev.android.view.drag.DirectionDragButton;
 import org.solovyev.android.view.drag.DragDirection;
 
-import java.math.BigInteger;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -20,9 +16,9 @@ import java.util.List;
  * Date: 4/21/12
  * Time: 8:00 PM
  */
-public enum AndroidNumeralBase implements UnitType<String> {
+public enum AndroidNumeralBase {
 
-    bin(NumeralBase.bin) {
+    bin(CalculatorNumeralBase.bin) {
         @NotNull
         @Override
         public List<Integer> getButtonIds() {
@@ -30,7 +26,7 @@ public enum AndroidNumeralBase implements UnitType<String> {
         }
     },
 
-    oct(NumeralBase.oct) {
+    oct(CalculatorNumeralBase.oct) {
         @NotNull
         @Override
         public List<Integer> getButtonIds() {
@@ -40,7 +36,7 @@ public enum AndroidNumeralBase implements UnitType<String> {
         }
     },
 
-    dec(NumeralBase.dec) {
+    dec(CalculatorNumeralBase.dec) {
         @NotNull
         @Override
         public List<Integer> getButtonIds() {
@@ -50,7 +46,7 @@ public enum AndroidNumeralBase implements UnitType<String> {
         }
     },
 
-    hex(NumeralBase.hex) {
+    hex(CalculatorNumeralBase.hex) {
 
         @NotNull
         private List<Integer> specialHexButtonIds = Arrays.asList(R.id.oneDigitButton, R.id.twoDigitButton, R.id.threeDigitButton, R.id.fourDigitButton, R.id.fiveDigitButton, R.id.sixDigitButton);
@@ -72,15 +68,10 @@ public enum AndroidNumeralBase implements UnitType<String> {
     };
 
     @NotNull
-    private final NumeralBase numeralBase;
+    private final CalculatorNumeralBase calculatorNumeralBase;
 
-    private AndroidNumeralBase(@NotNull NumeralBase numeralBase) {
+    private AndroidNumeralBase(@NotNull CalculatorNumeralBase calculatorNumeralBase) {
-        this.numeralBase = numeralBase;
+        this.calculatorNumeralBase = calculatorNumeralBase;
-    }
-
-    @NotNull
-    public Unit<String> createUnit(@NotNull String value) {
-        return UnitImpl.newInstance(value, this);
     }
 
     @NotNull
@@ -101,54 +92,13 @@ public enum AndroidNumeralBase implements UnitType<String> {
 
     @NotNull
     public NumeralBase getNumeralBase() {
-        return numeralBase;
+        return calculatorNumeralBase.getNumeralBase();
-    }
-
-    @NotNull
-    @Override
-    public Class<String> getUnitValueClass() {
-        return String.class;
-    }
-
-    @NotNull
-    private static final Converter converter = new Converter();
-
-    @NotNull
-    public static Converter getConverter() {
-        return converter;
-    }
-
-    public static class Converter implements UnitConverter<String> {
-
-        private Converter() {
-        }
-
-        @Override
-        public boolean isSupported(@NotNull UnitType<?> from, @NotNull UnitType<String> to) {
-            return AndroidNumeralBase.class.isAssignableFrom(from.getClass()) && AndroidNumeralBase.class.isAssignableFrom(to.getClass());
-        }
-
-        @NotNull
-        @Override
-        public Unit<String> convert(@NotNull Unit<?> from, @NotNull UnitType<String> toType) {
-            if (!isSupported(from.getUnitType(), toType)) {
-                throw new IllegalArgumentException("Types are not supported!");
-            }
-
-            final AndroidNumeralBase fromTypeAndroid = (AndroidNumeralBase) from.getUnitType();
-            final NumeralBase fromNumeralBase = fromTypeAndroid.numeralBase;
-            final NumeralBase toNumeralBase = ((AndroidNumeralBase) toType).numeralBase;
-            final String fromValue = (String) from.getValue();
-
-            final BigInteger decBigInteger = fromNumeralBase.toBigInteger(fromValue);
-            return UnitImpl.newInstance(toNumeralBase.toString(decBigInteger), (AndroidNumeralBase) toType);
-        }
     }
 
     @NotNull
     public static AndroidNumeralBase valueOf(@NotNull NumeralBase nb) {
         for (AndroidNumeralBase androidNumeralBase : values()) {
-            if (androidNumeralBase.numeralBase == nb) {
+            if (androidNumeralBase.calculatorNumeralBase.getNumeralBase() == nb) {
                 return androidNumeralBase;
             }
         }

calculatorpp/src/main/java/org/solovyev/android/calculator/ConversionMenuItem.java

@@ -30,10 +30,11 @@ enum ConversionMenuItem implements AMenuItem<CalculatorDisplayViewState> {
 
         if (operation == JsclOperation.numeric) {
             if (generic.getConstants().isEmpty()) {
-                convert(generic);
-
                 // conversion possible => return true
-                result = true;
+                final NumeralBase fromNumeralBase = CalculatorLocatorImpl.getInstance().getEngine().getNumeralBase();
+                if (fromNumeralBase != toNumeralBase) {
+                    result = CalculatorLocatorImpl.getInstance().getCalculator().isConversionPossible(generic, fromNumeralBase, this.toNumeralBase);
+                }
             }
         }
 
@@ -42,16 +43,10 @@ enum ConversionMenuItem implements AMenuItem<CalculatorDisplayViewState> {
 
     @Override
     public void onClick(@NotNull CalculatorDisplayViewState data, @NotNull Context context) {
-        final NumeralBase fromNumeralBase = CalculatorLocatorImpl.getInstance().getEngine().getNumeralBase();
+        final Generic result = data.getResult();
 
-        final Generic lastResult = data.getResult();
+        if (result != null) {
-
+            CalculatorLocatorImpl.getInstance().getCalculator().convert(result, this.toNumeralBase);
-        if (lastResult != null) {
-            convert(lastResult);
         }
     }
-
-    private void convert(@NotNull Generic generic) {
-        CalculatorLocatorImpl.getInstance().getCalculator().convert(generic, this.toNumeralBase);
-    }
 }

calculatorpp/src/main/java/org/solovyev/android/calculator/view/NumeralBaseConverterDialog.java

@@ -7,6 +7,7 @@ import android.view.WindowManager;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.*;
+import org.solovyev.android.calculator.units.CalculatorNumeralBase;
 import org.solovyev.math.units.Unit;
 import org.solovyev.math.units.UnitImpl;
 import org.solovyev.common.MutableObject;
@@ -30,22 +31,22 @@ public class NumeralBaseConverterDialog {
 
     public void show(@NotNull Context context) {
         final UnitConverterViewBuilder b = new UnitConverterViewBuilder();
-        b.setFromUnitTypes(Arrays.asList(AndroidNumeralBase.values()));
+        b.setFromUnitTypes(Arrays.asList(CalculatorNumeralBase.values()));
-        b.setToUnitTypes(Arrays.asList(AndroidNumeralBase.values()));
+        b.setToUnitTypes(Arrays.asList(CalculatorNumeralBase.values()));
 
         if (!StringUtils.isEmpty(initialFromValue)) {
             String value = initialFromValue;
             try {
                 value = ToJsclTextProcessor.getInstance().process(value).getExpression();
-                b.setFromValue(UnitImpl.newInstance(value, AndroidNumeralBase.valueOf(CalculatorLocatorImpl.getInstance().getEngine().getNumeralBase())));
+                b.setFromValue(UnitImpl.newInstance(value, CalculatorNumeralBase.valueOf(CalculatorLocatorImpl.getInstance().getEngine().getNumeralBase())));
             } catch (CalculatorParseException e) {
-                b.setFromValue(UnitImpl.newInstance(value, AndroidNumeralBase.valueOf(CalculatorLocatorImpl.getInstance().getEngine().getNumeralBase())));
+                b.setFromValue(UnitImpl.newInstance(value, CalculatorNumeralBase.valueOf(CalculatorLocatorImpl.getInstance().getEngine().getNumeralBase())));
             }
         } else {
-            b.setFromValue(UnitImpl.newInstance("", AndroidNumeralBase.valueOf(CalculatorLocatorImpl.getInstance().getEngine().getNumeralBase())));
+            b.setFromValue(UnitImpl.newInstance("", CalculatorNumeralBase.valueOf(CalculatorLocatorImpl.getInstance().getEngine().getNumeralBase())));
         }
 
-        b.setConverter(AndroidNumeralBase.getConverter());
+        b.setConverter(CalculatorNumeralBase.getConverter());
 
         final MutableObject<AlertDialog> alertDialogHolder = new MutableObject<AlertDialog>();
         b.setOkButtonOnClickListener(new View.OnClickListener() {

calculatorpp/src/main/java/org/solovyev/android/calculator/view/UnitConverterViewBuilder.java

@@ -11,10 +11,7 @@ import android.widget.*;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.CalculatorImpl;
-import org.solovyev.math.units.Unit;
+import org.solovyev.math.units.*;
-import org.solovyev.math.units.UnitConverter;
-import org.solovyev.math.units.UnitImpl;
-import org.solovyev.math.units.UnitType;
 import org.solovyev.android.calculator.R;
 import org.solovyev.android.view.ViewBuilder;
 import org.solovyev.android.view.ViewFromLayoutBuilder;
@@ -173,8 +170,8 @@ public class UnitConverterViewBuilder implements ViewBuilder<View> {
 
         final String from = fromEditText.getText().toString();
         try {
-            toEditText.setText(CalculatorImpl.doConversion(converter, from, getFromUnitType(main), getToUnitType(main)));
+            toEditText.setText(ConversionUtils.doConversion(converter, from, getFromUnitType(main), getToUnitType(main)));
-        } catch (CalculatorImpl.ConversionException e) {
+        } catch (ConversionException e) {
             toEditText.setText(context.getString(R.string.c_error));
         }
     }

calculatorpp/src/test/java/org/solovyev/android/AndroidNumeralBaseTest.java

@@ -3,7 +3,7 @@ package org.solovyev.android;
 import junit.framework.Assert;
 import org.jetbrains.annotations.NotNull;
 import org.junit.Test;
-import org.solovyev.android.calculator.AndroidNumeralBase;
+import org.solovyev.android.calculator.units.CalculatorNumeralBase;
 import org.solovyev.math.units.Unit;
 import org.solovyev.math.units.UnitConverter;
 
@@ -18,32 +18,32 @@ import java.util.Random;
 public class AndroidNumeralBaseTest {
 
     @NotNull
-    private final UnitConverter c = AndroidNumeralBase.getConverter();
+    private final UnitConverter c = CalculatorNumeralBase.getConverter();
 
     @Test
     public void testIsSupported() throws Exception {
-        Assert.assertTrue(c.isSupported(AndroidNumeralBase.bin, AndroidNumeralBase.dec));
+        Assert.assertTrue(c.isSupported(CalculatorNumeralBase.bin, CalculatorNumeralBase.dec));
     }
 
     @Test
     public void testConvertFromDec() throws Exception {
 
-        Assert.assertEquals("101", c.convert(AndroidNumeralBase.dec.createUnit("5"), AndroidNumeralBase.bin).getValue());
+        Assert.assertEquals("101", c.convert(CalculatorNumeralBase.dec.createUnit("5"), CalculatorNumeralBase.bin).getValue());
-        Assert.assertEquals("1", c.convert(AndroidNumeralBase.dec.createUnit("1"), AndroidNumeralBase.bin).getValue());
+        Assert.assertEquals("1", c.convert(CalculatorNumeralBase.dec.createUnit("1"), CalculatorNumeralBase.bin).getValue());
-        Assert.assertEquals("0", c.convert(AndroidNumeralBase.dec.createUnit("0"), AndroidNumeralBase.bin).getValue());
+        Assert.assertEquals("0", c.convert(CalculatorNumeralBase.dec.createUnit("0"), CalculatorNumeralBase.bin).getValue());
-        Assert.assertEquals("1111100111", c.convert(AndroidNumeralBase.dec.createUnit("999"), AndroidNumeralBase.bin).getValue());
+        Assert.assertEquals("1111100111", c.convert(CalculatorNumeralBase.dec.createUnit("999"), CalculatorNumeralBase.bin).getValue());
 
-        Assert.assertEquals("A23", c.convert(AndroidNumeralBase.dec.createUnit("2595"), AndroidNumeralBase.hex).getValue());
+        Assert.assertEquals("A23", c.convert(CalculatorNumeralBase.dec.createUnit("2595"), CalculatorNumeralBase.hex).getValue());
-        Assert.assertEquals("AEE", c.convert(AndroidNumeralBase.dec.createUnit("2798"), AndroidNumeralBase.hex).getValue());
+        Assert.assertEquals("AEE", c.convert(CalculatorNumeralBase.dec.createUnit("2798"), CalculatorNumeralBase.hex).getValue());
-        Assert.assertEquals("15", c.convert(AndroidNumeralBase.dec.createUnit("21"), AndroidNumeralBase.hex).getValue());
+        Assert.assertEquals("15", c.convert(CalculatorNumeralBase.dec.createUnit("21"), CalculatorNumeralBase.hex).getValue());
-        Assert.assertEquals("0", c.convert(AndroidNumeralBase.dec.createUnit("0"), AndroidNumeralBase.hex).getValue());
+        Assert.assertEquals("0", c.convert(CalculatorNumeralBase.dec.createUnit("0"), CalculatorNumeralBase.hex).getValue());
-        Assert.assertEquals("3E7", c.convert(AndroidNumeralBase.dec.createUnit("999"), AndroidNumeralBase.hex).getValue());
+        Assert.assertEquals("3E7", c.convert(CalculatorNumeralBase.dec.createUnit("999"), CalculatorNumeralBase.hex).getValue());
 
-        Assert.assertEquals("76", c.convert(AndroidNumeralBase.dec.createUnit("62"), AndroidNumeralBase.oct).getValue());
+        Assert.assertEquals("76", c.convert(CalculatorNumeralBase.dec.createUnit("62"), CalculatorNumeralBase.oct).getValue());
-        Assert.assertEquals("12", c.convert(AndroidNumeralBase.dec.createUnit("10"), AndroidNumeralBase.oct).getValue());
+        Assert.assertEquals("12", c.convert(CalculatorNumeralBase.dec.createUnit("10"), CalculatorNumeralBase.oct).getValue());
-        Assert.assertEquals("15", c.convert(AndroidNumeralBase.dec.createUnit("13"), AndroidNumeralBase.oct).getValue());
+        Assert.assertEquals("15", c.convert(CalculatorNumeralBase.dec.createUnit("13"), CalculatorNumeralBase.oct).getValue());
-        Assert.assertEquals("0", c.convert(AndroidNumeralBase.dec.createUnit("0"), AndroidNumeralBase.oct).getValue());
+        Assert.assertEquals("0", c.convert(CalculatorNumeralBase.dec.createUnit("0"), CalculatorNumeralBase.oct).getValue());
-        Assert.assertEquals("10445", c.convert(AndroidNumeralBase.dec.createUnit("4389"), AndroidNumeralBase.oct).getValue());
+        Assert.assertEquals("10445", c.convert(CalculatorNumeralBase.dec.createUnit("4389"), CalculatorNumeralBase.oct).getValue());
     }
 
     @Test
@@ -51,20 +51,20 @@ public class AndroidNumeralBaseTest {
         final Random random = new Random(new Date().getTime());
         for (int i = 0; i < 100000; i++) {
             final String value = String.valueOf(random.nextInt());
-            Assert.assertEquals(value, convertChain(value, AndroidNumeralBase.dec, AndroidNumeralBase.oct, AndroidNumeralBase.oct, AndroidNumeralBase.bin, AndroidNumeralBase.dec));
+            Assert.assertEquals(value, convertChain(value, CalculatorNumeralBase.dec, CalculatorNumeralBase.oct, CalculatorNumeralBase.oct, CalculatorNumeralBase.bin, CalculatorNumeralBase.dec));
-            Assert.assertEquals(value, convertChain(value, AndroidNumeralBase.dec, AndroidNumeralBase.bin, AndroidNumeralBase.hex, AndroidNumeralBase.dec, AndroidNumeralBase.dec));
+            Assert.assertEquals(value, convertChain(value, CalculatorNumeralBase.dec, CalculatorNumeralBase.bin, CalculatorNumeralBase.hex, CalculatorNumeralBase.dec, CalculatorNumeralBase.dec));
-            Assert.assertEquals(value, convertChain(value, AndroidNumeralBase.dec, AndroidNumeralBase.dec, AndroidNumeralBase.hex, AndroidNumeralBase.oct, AndroidNumeralBase.dec));
+            Assert.assertEquals(value, convertChain(value, CalculatorNumeralBase.dec, CalculatorNumeralBase.dec, CalculatorNumeralBase.hex, CalculatorNumeralBase.oct, CalculatorNumeralBase.dec));
-            Assert.assertEquals(value, convertChain(value, AndroidNumeralBase.dec, AndroidNumeralBase.hex, AndroidNumeralBase.bin, AndroidNumeralBase.oct, AndroidNumeralBase.dec));
+            Assert.assertEquals(value, convertChain(value, CalculatorNumeralBase.dec, CalculatorNumeralBase.hex, CalculatorNumeralBase.bin, CalculatorNumeralBase.oct, CalculatorNumeralBase.dec));
 
         }
     }
 
     @NotNull
-    private String convertChain(@NotNull String value, @NotNull AndroidNumeralBase baseAndroid, @NotNull AndroidNumeralBase... typeAndroids) {
+    private String convertChain(@NotNull String value, @NotNull CalculatorNumeralBase baseAndroid, @NotNull CalculatorNumeralBase... typeAndroids) {
         Unit<String> unit = baseAndroid.createUnit(value);
 
-        for (AndroidNumeralBase typeAndroid : typeAndroids) {
+        for (CalculatorNumeralBase typeAndroid : typeAndroids) {
-            unit = AndroidNumeralBase.getConverter().convert(unit, typeAndroid);
+            unit = CalculatorNumeralBase.getConverter().convert(unit, typeAndroid);
         }
 
         return unit.getValue();