Java IJavaValue类代码示例

import org.eclipse.jdt.debug.core.IJavaValue; //导入依赖的package包/类
private Set<IJavaObject> getAllReachableObjects(SubMonitor monitor) {
	try {
		Set<IJavaObject> objs = new HashSet<IJavaObject>();
		getReachableObjects(stack.getThis(), objs);
		for (IVariable var: stack.getLocalVariables())
			getReachableObjects((IJavaValue)var.getValue(), objs);
		for (ReferenceType type: getAllLoadedTypes(stack)) {
			for (Field field: type.allFields())
				if (field.isStatic() && isUsefulStaticDFSField(type.name(), field))
					getReachableObjects(JDIValue.createValue((JDIDebugTarget)stack.getDebugTarget(), type.getValue(field)), objs);
			monitor.worked(1);
		}
		return objs;
	} catch (DebugException e) {
		throw new RuntimeException(e);
	}
}
 

import org.eclipse.jdt.debug.core.IJavaValue; //导入依赖的package包/类
private String valueToString(IJavaValue value) {
	if(value instanceof IJavaArray) {
		try {
			IJavaArray array = (IJavaArray) value;
			IJavaValue[] values = array.getValues();
			String s = "";
			for(int i = 0; i < values.length; i++) {
				if(!s.isEmpty())
					s += ", ";
				s += valueSpecialChars(values[i]);
			}
			return "{" + s + "}";
		}
		catch (DebugException e) {
			e.printStackTrace();
			return null;
		}
	}
	else
		return valueSpecialChars(value);
}
 

import org.eclipse.jdt.debug.core.IJavaValue; //导入依赖的package包/类
private String valueSpecialChars(IJavaValue value) {
	try {
		if(value.getReferenceTypeName().equals("char"))
			return "'" + value.getValueString() + "'";

		if(value.getReferenceTypeName().equals(String.class.getName()))
			return "\"" + value.getValueString() + "\"";

		if(value instanceof IJavaObject) {
			if(((IJavaObject) value).isNull())
				return "null";
			else
				return runtime.getObject((IJavaObject) value, false, null).toString();
		}
		return value.getValueString();
	}
	catch (DebugException e) {
		e.printStackTrace();
		return null;
	}
}
 

import org.eclipse.jdt.debug.core.IJavaValue; //导入依赖的package包/类
FImage readFImage(IJavaObject var) throws DebugException {
	int width = ((IJavaPrimitiveValue)var.getField("width", true).getValue()).getIntValue();
	int height = ((IJavaPrimitiveValue)var.getField("height", true).getValue()).getIntValue();
	
	IJavaValue[] data = ((IJavaArray)var.getField("pixels", false).getValue()).getValues();
	
	FImage img = new FImage(width, height);
	
	for (int y=0; y<height; y++) {
		IJavaValue[] row = ((IJavaArray) data[y]).getValues();
		
		for (int x=0; x<width; x++) {
			img.pixels[y][x] = ((IJavaPrimitiveValue) row[x]).getFloatValue();
		}
	}
	
	return img;
}
 

import org.eclipse.jdt.debug.core.IJavaValue; //导入依赖的package包/类
@Override
protected Integer getArrayElement(int i) {
	try {
		IJavaValue val = exp.getValue().getValue(i);
		if (field == null) {
			return ((JDIPrimitiveValue)val).getIntValue();
		}
		else {
			Value fieldVal = ((JDIObjectValue)val).getUnderlyingObject().getValue(field);
			return ((PrimitiveValue)fieldVal).intValue();
		}
	} catch (DebugException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
		return null;
	}
}
 

import org.eclipse.jdt.debug.core.IJavaValue; //导入依赖的package包/类
@Override
protected void displayResult(final IEvaluationResult result) {
	final Shell shell = JDIDebugUIPlugin.getShell();
	shell.getDisplay().asyncExec(new Runnable() {
		
		@Override
		public void run() {
		    MessageBox mb = new MessageBox(shell, SWT.OK);
		    mb.setText("Visualize Variable History:");		
		    IJavaValue value = result.getValue();
			if (value instanceof IJavaArray) {
					ArraysMainController.addExpression(new ArrayExpression(result.getSnippet(), (IJavaArray)value));
			}
		}
	});
}
 

import org.eclipse.jdt.debug.core.IJavaValue; //导入依赖的package包/类
private void cleanupWindows() {
	try {
		if (awtWindows != null) {
			IJavaValue[] newWindows = getAWTWindows();
			for (IJavaValue newWindow: newWindows) {
				if (!contains(awtWindows, newWindow)) {
					//System.out.println("Killing AWT window " + newWindow);
					((IJavaObject)newWindow).sendMessage("dispose", "()V", new IJavaValue[] { }, thread, null);
				}
			}
		}
		if (swtShells != null) {
			IJavaValue[] newShells = getSWTShells();
			for (IJavaValue newShell: newShells) {
				if (!contains(swtShells, newShell)) {
					//System.out.println("Killing SWT shell " + newShell);
					((IJavaObject)newShell).sendMessage("dispose", "()V", new IJavaValue[] { }, thread, null);
					// Without the update message the shells won't actually close.
					((IJavaObject)swtDefaultDisplay).sendMessage("update", "()V", new IJavaValue[] { }, thread, null);
				}
			}
		}
	} catch (DebugException e) {
		throw new RuntimeException(e);
	}
}
 

import org.eclipse.jdt.debug.core.IJavaValue; //导入依赖的package包/类
/**
 * Finds the number of subexpressions of the
 * given expression that are known to be null.
 * @param expr The expression to search.
 * @return The number of subexpressions of the
 * given expression known to be null.
 */
private int getNumNulls(Expression expr) {
	final int[] numNulls = new int[] { 0 };
	expr.accept(new ASTVisitor() {
		private Set<Effect> curEffects = Collections.<Effect>emptySet();
		@Override
		public void postVisit(ASTNode node) {
			if (node instanceof Expression) {
				if (node instanceof NullLiteral)
					numNulls[0]++;
				else {
					Result result = expressionEvaluator.getResult((Expression)node, curEffects);
					if (result == null || result.getValue() == null)  // TODO: result is null for method/constructor names or crashed native calls or after side effects during refinement.
						return;
					IJavaValue value = result.getValue().getValue();
					if (value != null && value.isNull())
    					numNulls[0]++;
					curEffects = result.getEffects();
				}
			}
		}
	});
	return numNulls[0];
}
 

import org.eclipse.jdt.debug.core.IJavaValue; //导入依赖的package包/类
protected int getHashCode(IJavaValue value) throws DebugException {
	if (value == null || value.isNull())
		return -37;
	else if (value instanceof IJavaPrimitiveValue)
		return ((IJavaPrimitiveValue)value).getIntValue() * 5 + 137;  // We add a number to avoid clustering around 0. 
	else if (value instanceof IJavaArray) {  // Heuristically only look at the array's length and its first ten elements.
		IJavaArray array = (IJavaArray)value;
		int length = array.getLength();
		int hashCode = length * 5 + array.getSignature().hashCode() * 7;
		for (int i = 0; i < 10 && i < length; i++)
			hashCode = 31 * hashCode + getHashCode(array.getValue(i));
		return hashCode;
	} else if (value instanceof IJavaClassObject)
		return ((IJavaClassObject)value).getInstanceType().getName().hashCode() * 11;
	else if ("V".equals(value.getSignature()))
		return -137;
	else {
		IJavaObject obj = (IJavaObject)value;
		if ("Ljava/lang/String;".equals(obj.getSignature()))  // Fast-path Strings
			return obj.toString().hashCode();
		return ((IJavaPrimitiveValue)obj.sendMessage("hashCode", "()I", new IJavaValue[] { }, thread, null)).getIntValue();
	}
}
 

import org.eclipse.jdt.debug.core.IJavaValue; //导入依赖的package包/类
private void getReachableObjects(IJavaValue value, Set<IJavaObject> objs) throws DebugException {
	if (value instanceof IJavaArray) {
		IJavaArray arr = (IJavaArray)value;
		if (objs.add(arr) && !EclipseUtils.isPrimitive(Signature.getElementType(arr.getSignature())) && !arr.getSignature().equals("[Ljava/lang/String;"))
			for (IJavaValue elem: arr.getValues())
				getReachableObjects(elem, objs);
	} else if (value instanceof IJavaObject) {
		IJavaObject obj = (IJavaObject)value;
		if (objs.add(obj)) {
			// We use the internal API here because the Eclipse one must get each field's value one-by-one and so is much slower.
			ObjectReference obj2 = ((JDIObjectValue)obj).getUnderlyingObject();
			if (obj2 != null)  // null values fail this test
				for (Map.Entry<Field, Value> field: obj2.getValues(obj2.referenceType().allFields()).entrySet())
					if (isUsefulStaticDFSField(field.getKey().declaringType().name(), field.getKey()))
						getReachableObjects(JDIValue.createValue((JDIDebugTarget)stack.getDebugTarget(), field.getValue()), objs);
		}
	}
}
 

import org.eclipse.jdt.debug.core.IJavaValue; //导入依赖的package包/类
/**
 * Fills instanceof skeleton pieces.
 * @param instance The instanceof part of the skeleton.
 * @param parentsOfHoles All nodes that are parents of some hole.
 * @return The synthesized expressions corresponding to this
 * skeleton piece and the type constraint representing their types.
 */
private ExpressionsAndTypeConstraints fillInstanceof(InstanceofExpression instance, Set<ASTNode> parentsOfHoles) {
	try {
		codehint.ast.Type rightOperand = ASTConverter.copy(instance.getRightOperand());
		IJavaType targetType = EclipseUtils.getType(instance.getRightOperand().toString(), stack, target, typeCache);
		rightOperand.setStaticType(targetType);
		ExpressionsAndTypeConstraints exprResult = fillSkeleton(instance.getLeftOperand(), new SameHierarchy(targetType), parentsOfHoles);
		Map<String, ArrayList<codehint.ast.Expression>> resultExprs = new HashMap<String, ArrayList<codehint.ast.Expression>>(exprResult.getExprs().size());
		for (Map.Entry<String, ArrayList<codehint.ast.Expression>> res: exprResult.getExprs().entrySet())
			for (codehint.ast.Expression expr: res.getValue()) {
				IJavaValue exprValue = expressionEvaluator.getValue(expr, Collections.<Effect>emptySet());
				Utils.addToListMap(resultExprs, res.getKey(), expressionMaker.makeInstanceOf(expr, rightOperand, booleanType, exprValue == null ? null : valueCache.getBooleanJavaValue(!exprValue.isNull() && subtypeChecker.isSubtypeOf(exprValue.getJavaType(), targetType))));
			}
		return new ExpressionsAndTypeConstraints(resultExprs, new SupertypeBound(booleanType));
	} catch (DebugException e) {
		throw new RuntimeException(e);
	}
}
 

import org.eclipse.jdt.debug.core.IJavaValue; //导入依赖的package包/类
/**
 * Fills number literal skeleton pieces.
 * @param node The number literal part of the skeleton.
 * @return The synthesized expressions corresponding to this
 * skeleton piece and the type constraint representing their types.
 */
private ExpressionsAndTypeConstraints fillNumberLiteral(Expression node) {
	String str = ((NumberLiteral)node).getToken();
	int lastChar = str.charAt(str.length() - 1);
	// Rules taken from: http://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html.
	IJavaType resultType = null;
	IJavaValue value = null;
	if (lastChar == 'l' || lastChar == 'L') {
		resultType = EclipseUtils.getFullyQualifiedType("long", stack, target, typeCache);
		value = target.newValue(Long.parseLong(str));
	} else if (lastChar == 'f' || lastChar == 'f') {
		resultType = EclipseUtils.getFullyQualifiedType("float", stack, target, typeCache);
		value = target.newValue(Float.parseFloat(str));
	} else if (lastChar == 'd' || lastChar == 'd' || str.indexOf('.') != -1) {
		resultType = EclipseUtils.getFullyQualifiedType("double", stack, target, typeCache);
		value = target.newValue(Double.parseDouble(str));
	} else {
		resultType = intType;
		value = target.newValue(Integer.parseInt(str));
	}
	return new ExpressionsAndTypeConstraints(expressionMaker.makeNumber(str, value, resultType, thread), new SupertypeBound(resultType));
}
 

import org.eclipse.jdt.debug.core.IJavaValue; //导入依赖的package包/类
/**
 * Creates all possible calls using the given actuals.
 * @param method The method being called.
 * @param name The method name.
 * @param constraintName The name of the return type of the method, which
 * is used to store the resulting expressions.
 * @param receiver The receiving object.
 * @param callNode The node representing the call piece of the skeleton.
 * @param returnType The return type of the function.
 * @param thisType The type of the this object.
 * @param possibleActuals A list of all the possible actuals for each argument.
 * @param curActuals The current list of actuals, which is built
 * up through recursion.
 * @param resultExprs The map that stores the resulting expressions.
 * @param monitor The progress monitor.
 * @throws DebugException 
 */
private void makeAllCalls(Method method, String name, String constraintName, codehint.ast.Expression receiver, Expression callNode, IJavaType returnType, IJavaType thisType, ArrayList<ArrayList<codehint.ast.Expression>> possibleActuals, ArrayList<codehint.ast.Expression> curActuals, Map<String, ArrayList<codehint.ast.Expression>> resultExprs, IProgressMonitor monitor) throws DebugException {
	if (monitor.isCanceled())
		throw new OperationCanceledException();
	if (curActuals.size() == possibleActuals.size()) {
		codehint.ast.Expression callExpr = null;
		if (callNode instanceof SuperMethodInvocation)
			callExpr = expressionMaker.makeSuperCall(name, ASTConverter.copy(((SuperMethodInvocation)callNode).getQualifier()), curActuals, returnType, null, method);
		else
			callExpr = expressionMaker.makeCall(name, receiver, curActuals, returnType, thisType, method, thread, staticEvaluator);
		IJavaValue callValue = expressionEvaluator.getValue(callExpr, Collections.<Effect>emptySet());
		if (callValue == null || !"V".equals(callValue.getSignature()))
			Utils.addToListMap(resultExprs, constraintName, callExpr);
		monitor.worked(1);
	} else {
		int argNum = curActuals.size();
		for (codehint.ast.Expression e : possibleActuals.get(argNum)) {
			curActuals.add(e);
			makeAllCalls(method, name, constraintName, receiver, callNode, returnType, thisType, possibleActuals, curActuals, resultExprs, monitor);
			curActuals.remove(argNum);
		}
	}
}
 

import org.eclipse.jdt.debug.core.IJavaValue; //导入依赖的package包/类
Value computeInfixOp(IJavaValue left, InfixExpression.Operator op, IJavaValue right, IJavaType type) throws DebugException {
	try {
		if (EclipseUtils.isInt(type))
			return computeIntInfixOp(left, op, right);
		else if (EclipseUtils.isBoolean(type))
			return computeBooleanInfixOp(left, op, right);
		else if (EclipseUtils.isLong(type))
			return computeLongInfixOp(left, op, right);
		else if (type instanceof IJavaReferenceType)
			return computeRefInfixOp(left, op, right);
		else
			throw new RuntimeException("Unexpected type: " + type);
	} catch (NumberFormatException e) {
		return valueCache.voidValue();
	}
}
 

import org.eclipse.jdt.debug.core.IJavaValue; //导入依赖的package包/类
private Value computeRefInfixOp(IJavaValue left, InfixExpression.Operator op, IJavaValue right) throws DebugException {
	if (left == null || right == null)
		return null;
	if (!(left instanceof IJavaObject) || !(right instanceof IJavaObject))
		return valueCache.voidValue();
	IJavaObject l = (IJavaObject)left;
	IJavaObject r = (IJavaObject)right;
	if (op == InfixExpression.Operator.EQUALS)
		return valueCache.getBooleanJavaValue(l.getUniqueId() == r.getUniqueId());
	if (op == InfixExpression.Operator.NOT_EQUALS)
		return valueCache.getBooleanJavaValue(l.getUniqueId() != r.getUniqueId());
	IJavaType lType = l.getJavaType();
	IJavaType rType = r.getJavaType();
	if (op == InfixExpression.Operator.PLUS && ((lType != null && "java.lang.String".equals(lType.getName())) || (rType != null && "java.lang.String".equals(rType.getName()))))
		return valueCache.getStringJavaValue(l.getValueString() + r.getValueString());
	throw new RuntimeException("Unknown infix operation: " + op.toString() + " for " + left.toString() + " of type " + lType.toString() + " and " + right.toString() + " of type " + rType.toString());
}