refactor + version changed

AndroidManifest.xml

@@ -3,7 +3,7 @@
 <manifest xmlns:a="http://schemas.android.com/apk/res/android"
 		  package="org.solovyev.android.calculator"
 		  a:versionCode="2"
-		  a:versionName="1.1.0">
+		  a:versionName="1.1.1">
 
 	<uses-sdk 	a:minSdkVersion="4"
 				a:targetSdkVersion="8"/>

src/main/java/org/solovyev/android/calculator/math/MathType.java

@@ -6,13 +6,17 @@
 package org.solovyev.android.calculator.math;
 
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.CharacterAtPositionFinder;
 import org.solovyev.android.calculator.StartsWithFinder;
 import org.solovyev.android.calculator.model.CalculatorEngine;
 import org.solovyev.common.utils.CollectionsUtils;
 import org.solovyev.common.utils.Finder;
 
-import java.util.*;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
 
 import static org.solovyev.common.utils.CollectionsUtils.get;
 
@@ -32,24 +36,67 @@ public enum MathType {
 		}
 	},
 
-	power_10(300, true, false, "E"),
+	power_10(300, true, false, "E") {
+		@Override
+		protected String getSubstitute(@NotNull String match) {
+			return POWER_10_JSCL;
+		}
+	},
 
 	postfix_function(400, true, false, Functions.allPostfix),
 	unary_operation(500, false, false, "-", "=", "!"),
-	binary_operation(600, false, false, "-", "+", "*", "×", "∙", "/", "^"),
+	binary_operation(600, false, false, "-", "+", "*", "×", "∙", "/", "^") {
+		@Override
+		protected String getSubstitute(@NotNull String match) {
+			if ( match.equals("×") || match.equals("∙") ) {
+				return "*";
+			} else {
+				return null;
+			}
+		}
+	},
+
 	open_group_symbol(800, true, false, "[", "(", "{") {
 		@Override
 		public boolean isNeedMultiplicationSignBefore(@NotNull MathType mathTypeBefore) {
 			return super.isNeedMultiplicationSignBefore(mathTypeBefore) && mathTypeBefore != function;
 		}
+
+		@Override
+		protected String getSubstitute(@NotNull String match) {
+			return "(";
+		}
 	},
+
 	close_group_symbol(900, false, true, "]", ")", "}") {
 		@Override
 		public boolean isNeedMultiplicationSignBefore(@NotNull MathType mathTypeBefore) {
 			return false;
 		}
+
+		@Override
+		protected String getSubstitute(@NotNull String match) {
+			return ")";
+		}
 	},
-	function(1000, true, true, Functions.allPrefix),
+
+	function(1000, true, true, Functions.allPrefix) {
+		@Override
+		protected String getSubstitute(@NotNull String match) {
+			final String result;
+
+			if (match.equals(Functions.LN)) {
+				result = Functions.LN_JSCL;
+			} else if (match.equals(Functions.SQRT)) {
+				result = Functions.SQRT_JSCL;
+			} else {
+				result = match;
+			}
+
+			return result;
+		}
+	},
+
 	constant(1100, true, true) {
 		@NotNull
 		@Override
@@ -104,6 +151,16 @@ public enum MathType {
 		return needMultiplicationSignBefore && mathTypeBefore.isNeedMultiplicationSignAfter();
 	}
 
+	public int process(@NotNull StringBuilder result, int i, @NotNull String match) {
+		final String substitute = getSubstitute(match);
+		result.append(substitute == null ? match : substitute);
+		return i + match.length() - 1;
+	}
+
+	@Nullable
+	protected String getSubstitute(@NotNull String match) {
+		return null;
+	}
 
 	public static final List<String> openGroupSymbols = Arrays.asList("[]", "()", "{}");
 
@@ -186,6 +243,10 @@ public enum MathType {
 			this.match = match;
 		}
 
+		public int process(@NotNull StringBuilder result, int i) {
+		 	return mathType.process(result, i, match);
+		}
+
 		@NotNull
 		public String getMatch() {
 			return match;

src/main/java/org/solovyev/android/calculator/model/CalculatorEngine.java

@@ -63,6 +63,9 @@ public enum CalculatorEngine {
 	@NotNull
 	private DecimalFormatSymbols decimalGroupSymbols = new DecimalFormatSymbols(Locale.getDefault());
 
+	@NotNull
+	private ThreadKiller threadKiller = new AndroidThreadKiller();
+
 	@NotNull
 	public String format(@NotNull Double value) {
 		if (!value.isInfinite() && !value.isNaN()) {
@@ -150,8 +153,7 @@ public enum CalculatorEngine {
 
 					if (calculationThreadLocal != null) {
 						// todo serso: interrupt doesn't stop the thread but it MUST be killed
-						calculationThreadLocal.setPriority(Thread.MIN_PRIORITY);
-						calculationThreadLocal.interrupt();
+						threadKiller.killThread(calculationThreadLocal);
 						//calculationThreadLocal.stop();
 						resetInterpreter();
 					}
@@ -251,4 +253,29 @@ public enum CalculatorEngine {
 		}
 
 		private static final String cmds[] = new String[]{"expand", "factorize", "elementary", "simplify", "numeric", "toMathML", "toJava"};*/
+
+	// for tests only
+	void setThreadKiller(@NotNull ThreadKiller threadKiller) {
+		this.threadKiller = threadKiller;
+	}
+
+	private static interface ThreadKiller {
+		void killThread(@NotNull Thread thread);
+	}
+
+	private static class AndroidThreadKiller implements ThreadKiller {
+		@Override
+		public void killThread(@NotNull Thread thread) {
+			thread.setPriority(Thread.MIN_PRIORITY);
+			thread.interrupt();
+		}
+	}
+
+	public static class ThreadKillerImpl implements ThreadKiller {
+		@Override
+		public void killThread(@NotNull Thread thread) {
+			thread.setPriority(Thread.MIN_PRIORITY);
+			thread.stop();
+		}
+	}
 }

src/main/java/org/solovyev/android/calculator/model/ToJsclTextProcessor.java

@@ -8,9 +8,8 @@ package org.solovyev.android.calculator.model;
 
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
-import org.solovyev.android.calculator.jscl.JsclOperation;
 import org.solovyev.android.calculator.StartsWithFinder;
-import org.solovyev.android.calculator.math.Functions;
+import org.solovyev.android.calculator.jscl.JsclOperation;
 import org.solovyev.android.calculator.math.MathType;
 import org.solovyev.common.utils.CollectionsUtils;
 import org.solovyev.common.utils.FilterType;
@@ -26,49 +25,39 @@ class ToJsclTextProcessor implements TextProcessor<PreparedExpression> {
 	public PreparedExpression process(@NotNull String s) throws ParseException {
 
 		final StartsWithFinder startsWithFinder = new StartsWithFinder(s, 0);
-		final StringBuilder sb = new StringBuilder();
+		final StringBuilder result = new StringBuilder();
 
 		MathType.Result mathTypeResult = null;
+		MathType mathTypeBefore;
+
 		for (int i = 0; i < s.length(); i++) {
-			char ch = s.charAt(i);
 			startsWithFinder.setI(i);
 
-			if ( Character.isWhitespace(ch)) {
+			if ( Character.isWhitespace(s.charAt(i))) {
 				continue;
 			}
 
-			mathTypeResult = checkMultiplicationSignBeforeFunction(sb, s, i, mathTypeResult);
+			mathTypeBefore = mathTypeResult == null ? null : mathTypeResult.getMathType();
 
-			final MathType mathType = mathTypeResult.getMathType();
-			if (mathType == MathType.open_group_symbol) {
-				sb.append('(');
-			} else if (mathType == MathType.close_group_symbol) {
-				sb.append(')');
-			} else if (ch == '×' || ch == '∙') {
-				sb.append("*");
-			} else if (mathType == MathType.power_10) {
-				sb.append(MathType.POWER_10_JSCL);
-			} else if (mathType == MathType.function) {
-				sb.append(toJsclFunction(mathTypeResult.getMatch()));
-				i += mathTypeResult.getMatch().length() - 1;
+			mathTypeResult = MathType.getType(s, i);
 
-				// NOTE: fix for jscl for EMPTY functions processing (see tests)
-				startsWithFinder.setI(i + 1);
-				if ( i < s.length() && CollectionsUtils.get(MathType.openGroupSymbols, startsWithFinder) != null) {
+			if (mathTypeBefore != null) {
+
+				final MathType current = mathTypeResult.getMathType();
+
+				if (current.isNeedMultiplicationSignBefore(mathTypeBefore)) {
+					result.append("*");
+				}
+			}
+
+			if (mathTypeBefore == MathType.function && CollectionsUtils.get(MathType.openGroupSymbols, startsWithFinder) != null) {
 				throw new ParseException("Empty function: " + mathTypeResult.getMatch());
-					/*i += 2;
-					sb.append("(" + SPECIAL_STRING + ")");
-					mathTypeResult = new MathType.Result(MathType.close_group_symbol, ")");*/
-				}
-			} else if (mathType == MathType.constant) {
-				sb.append(mathTypeResult.getMatch());
-				i += mathTypeResult.getMatch().length() - 1;
-			} else {
-				sb.append(ch);
-			}
 			}
 
-		return replaceVariables(sb.toString());
+			i = mathTypeResult.process(result, i);
+		}
+
+		return replaceVariables(result.toString());
 	}
 
 	@NotNull
@@ -167,21 +156,6 @@ class ToJsclTextProcessor implements TextProcessor<PreparedExpression> {
 		return false;
 	}
 
-	@NotNull
-	private static String toJsclFunction(@NotNull String function) {
-		final String result;
-
-		if (function.equals(Functions.LN)) {
-			result = Functions.LN_JSCL;
-		} else if (function.equals(Functions.SQRT)) {
-			result = Functions.SQRT_JSCL;
-		} else {
-			result = function;
-		}
-
-		return result;
-	}
-
 	private static class EndsWithFinder implements Finder<String> {
 
 		private int i;
@@ -203,27 +177,6 @@ class ToJsclTextProcessor implements TextProcessor<PreparedExpression> {
 		}
 	}
 
-	@NotNull
-	private static MathType.Result checkMultiplicationSignBeforeFunction(@NotNull StringBuilder sb,
-																		 @NotNull String s,
-																		 int i,
-																		 @Nullable MathType.Result mathTypeBeforeResult) {
-		final MathType.Result result = MathType.getType(s, i);
-
-		if (i > 0) {
-
-			final MathType current = result.getMathType();
-			assert mathTypeBeforeResult != null;
-			final MathType before = mathTypeBeforeResult.getMathType();
-
-			if (current.isNeedMultiplicationSignBefore(before)) {
-				sb.append("*");
-			}
-		}
-
-		return result;
-	}
-
 	public static String wrap(@NotNull JsclOperation operation, @NotNull String s) {
 		return operation.name() + "(\"" + s + "\");";
 	}

src/test/java/org/solovyev/android/calculator/model/CalculatorEngineTest.java

@@ -25,6 +25,7 @@ public class CalculatorEngineTest {
 	public static void setUp() throws Exception {
 		CalculatorEngine.instance.init(null, null);
 		CalculatorEngine.instance.setPrecision(3);
+		CalculatorEngine.instance.setThreadKiller(new CalculatorEngine.ThreadKillerImpl());
 	}
 
 	@Test