org.eclipse.jdt.core.dom.ForStatement Java Examples

/**
 * Helper to generate an index based <code>for</code> loop to iterate over an array.
 * 
 * @param ast the current {@link AST} instance to generate the {@link ASTRewrite} for
 * @return an applicable {@link ASTRewrite} instance
 */
private ASTRewrite generateForRewrite(AST ast) {
	ASTRewrite rewrite= ASTRewrite.create(ast);

	ForStatement loopStatement= ast.newForStatement();
	SimpleName loopVariableName= resolveLinkedVariableNameWithProposals(rewrite, "int", null, true); //$NON-NLS-1$
	loopStatement.initializers().add(getForInitializer(ast, loopVariableName));

	FieldAccess getArrayLengthExpression= ast.newFieldAccess();
	getArrayLengthExpression.setExpression((Expression) rewrite.createCopyTarget(fCurrentExpression));
	getArrayLengthExpression.setName(ast.newSimpleName("length")); //$NON-NLS-1$

	loopStatement.setExpression(getLinkedInfixExpression(rewrite, loopVariableName.getIdentifier(), getArrayLengthExpression, InfixExpression.Operator.LESS));
	loopStatement.updaters().add(getLinkedIncrementExpression(rewrite, loopVariableName.getIdentifier()));

	Block forLoopBody= ast.newBlock();
	forLoopBody.statements().add(ast.newExpressionStatement(getForBodyAssignment(rewrite, loopVariableName)));
	forLoopBody.statements().add(createBlankLineStatementWithCursorPosition(rewrite));
	loopStatement.setBody(forLoopBody);
	rewrite.replace(fCurrentNode, loopStatement, null);

	return rewrite;
}
 

public boolean visit(VariableDeclarationExpression node) {
	ASTNode parent = node.getParent();
	while(parent != null){
		if(parent instanceof Block || parent instanceof ForStatement){
			break;
		}
		parent = parent.getParent();
	}
	if(parent != null) {
		int start = _unit.getLineNumber(node.getStartPosition());
		int end = _unit.getLineNumber(parent.getStartPosition() + parent.getLength());
		for (Object o : node.fragments()) {
			VariableDeclarationFragment vdf = (VariableDeclarationFragment) o;
			Pair<String, Type> pair = new Pair<String, Type>(vdf.getName().getFullyQualifiedName(), node.getType());
			Pair<Integer, Integer> range = new Pair<Integer, Integer>(start, end);
			_tmpVars.put(pair, range);
		}
	}
	return true;
}
 

public Statement getLoopBody()
{
	if (loopStatement instanceof WhileStatement)
	{
		return ((WhileStatement)loopStatement).getBody();
	}
	else if (loopStatement instanceof ForStatement)
	{
		return ((ForStatement)loopStatement).getBody();
	}
	else if (loopStatement instanceof DoStatement)
	{
		return ((DoStatement)loopStatement).getBody();
	}
	else if (loopStatement instanceof EnhancedForStatement)
	{
		return ((EnhancedForStatement)loopStatement).getBody();
	}
	return null;
}
 

@Override
public boolean visit(final ForStatement it) {
  this.appendToBuffer("for (");
  this.visitAll(it.initializers());
  this.appendToBuffer("; ");
  Expression _expression = it.getExpression();
  boolean _tripleNotEquals = (_expression != null);
  if (_tripleNotEquals) {
    it.getExpression().accept(this);
  }
  this.appendToBuffer("; ");
  this.visitAll(it.updaters());
  this.appendToBuffer(") ");
  it.getBody().accept(this);
  return false;
}
 

private void checkSendInLoopNode(Statement loopNode) {
	Statement body;
	if (loopNode instanceof WhileStatement) {
		WhileStatement whileLoop = (WhileStatement) loopNode;
		body = whileLoop.getBody();
	} else if (loopNode instanceof ForStatement) {
		ForStatement forLoop = (ForStatement) loopNode;
		body = forLoop.getBody();
	} else {
		DoStatement doWhileLoop = (DoStatement) loopNode;
		body = doWhileLoop.getBody();
	}
	boolean showErrorHere = placeOfError == loopNode;
	if (showErrorHere) {
		placeOfError = body;
	}
	if (body instanceof Block) {
		checkSendInBlock((Block) body, showErrorHere);
	} else {
		checkSendInStatement(body);
	}
}
 

private RefactoringStatus checkSelection(VariableDeclaration decl) {
	ASTNode parent= decl.getParent();
	if (parent instanceof MethodDeclaration) {
		return RefactoringStatus.createFatalErrorStatus(RefactoringCoreMessages.InlineTempRefactoring_method_parameter);
	}

	if (parent instanceof CatchClause) {
		return RefactoringStatus.createFatalErrorStatus(RefactoringCoreMessages.InlineTempRefactoring_exceptions_declared);
	}

	if (parent instanceof VariableDeclarationExpression && parent.getLocationInParent() == ForStatement.INITIALIZERS_PROPERTY) {
		return RefactoringStatus.createFatalErrorStatus(RefactoringCoreMessages.InlineTempRefactoring_for_initializers);
	}

	if (parent instanceof VariableDeclarationExpression && parent.getLocationInParent() == TryStatement.RESOURCES_PROPERTY) {
		return RefactoringStatus.createFatalErrorStatus(RefactoringCoreMessages.InlineTempRefactoring_resource_in_try_with_resources);
	}

	if (decl.getInitializer() == null) {
		String message= Messages.format(RefactoringCoreMessages.InlineTempRefactoring_not_initialized, BasicElementLabels.getJavaElementName(decl.getName().getIdentifier()));
		return RefactoringStatus.createFatalErrorStatus(message);
	}

	return checkAssignments(decl);
}
 

private boolean isSingleControlStatementWithoutBlock() {
	List<Statement> statements= fDeclaration.getBody().statements();
	int size= statements.size();
	if (size != 1)
		return false;
	Statement statement= statements.get(size - 1);
	int nodeType= statement.getNodeType();
	if (nodeType == ASTNode.IF_STATEMENT) {
		IfStatement ifStatement= (IfStatement) statement;
		return !(ifStatement.getThenStatement() instanceof Block)
			&& !(ifStatement.getElseStatement() instanceof Block);
	} else if (nodeType == ASTNode.FOR_STATEMENT) {
		return !(((ForStatement)statement).getBody() instanceof Block);
	} else if (nodeType == ASTNode.WHILE_STATEMENT) {
		return !(((WhileStatement)statement).getBody() instanceof Block);
	}
	return false;
}
 

private Statement getParentLoopBody(ASTNode node) {
	Statement stmt= null;
	ASTNode start= node;
	while (start != null
			&& !(start instanceof ForStatement)
			&& !(start instanceof DoStatement)
			&& !(start instanceof WhileStatement)
			&& !(start instanceof EnhancedForStatement)
			&& !(start instanceof SwitchStatement)) {
		start= start.getParent();
	}
	if (start instanceof ForStatement) {
		stmt= ((ForStatement)start).getBody();
	} else if (start instanceof DoStatement) {
		stmt= ((DoStatement)start).getBody();
	} else if (start instanceof WhileStatement) {
		stmt= ((WhileStatement)start).getBody();
	} else if (start instanceof EnhancedForStatement) {
		stmt= ((EnhancedForStatement)start).getBody();
	}
	if (start != null && start.getParent() instanceof LabeledStatement) {
		LabeledStatement labeledStatement= (LabeledStatement)start.getParent();
		fEnclosingLoopLabel= labeledStatement.getLabel();
	}
	return stmt;
}
 

/**
 * Helper to generate an index based <code>for</code> loop to iterate over a {@link List}
 * implementation.
 * 
 * @param ast the current {@link AST} instance to generate the {@link ASTRewrite} for
 * @return an applicable {@link ASTRewrite} instance
 */
private ASTRewrite generateIndexBasedForRewrite(AST ast) {
	ASTRewrite rewrite= ASTRewrite.create(ast);

	ForStatement loopStatement= ast.newForStatement();
	SimpleName loopVariableName= resolveLinkedVariableNameWithProposals(rewrite, "int", null, true); //$NON-NLS-1$
	loopStatement.initializers().add(getForInitializer(ast, loopVariableName));

	MethodInvocation listSizeExpression= ast.newMethodInvocation();
	listSizeExpression.setName(ast.newSimpleName("size")); //$NON-NLS-1$
	Expression listExpression= (Expression) rewrite.createCopyTarget(fCurrentExpression);
	listSizeExpression.setExpression(listExpression);

	loopStatement.setExpression(getLinkedInfixExpression(rewrite, loopVariableName.getIdentifier(), listSizeExpression, InfixExpression.Operator.LESS));
	loopStatement.updaters().add(getLinkedIncrementExpression(rewrite, loopVariableName.getIdentifier()));

	Block forLoopBody= ast.newBlock();
	forLoopBody.statements().add(ast.newExpressionStatement(getIndexBasedForBodyAssignment(rewrite, loopVariableName)));
	forLoopBody.statements().add(createBlankLineStatementWithCursorPosition(rewrite));
	loopStatement.setBody(forLoopBody);
	rewrite.replace(fCurrentNode, loopStatement, null);

	return rewrite;
}
 

private static boolean locationNeedsParentheses(StructuralPropertyDescriptor locationInParent) {
	if (locationInParent instanceof ChildListPropertyDescriptor && locationInParent != InfixExpression.EXTENDED_OPERANDS_PROPERTY) {
		// e.g. argument lists of MethodInvocation, ClassInstanceCreation, dimensions of ArrayCreation ...
		return false;
	}
	if (locationInParent == VariableDeclarationFragment.INITIALIZER_PROPERTY
			|| locationInParent == SingleVariableDeclaration.INITIALIZER_PROPERTY
			|| locationInParent == ReturnStatement.EXPRESSION_PROPERTY
			|| locationInParent == EnhancedForStatement.EXPRESSION_PROPERTY
			|| locationInParent == ForStatement.EXPRESSION_PROPERTY
			|| locationInParent == WhileStatement.EXPRESSION_PROPERTY
			|| locationInParent == DoStatement.EXPRESSION_PROPERTY
			|| locationInParent == AssertStatement.EXPRESSION_PROPERTY
			|| locationInParent == AssertStatement.MESSAGE_PROPERTY
			|| locationInParent == IfStatement.EXPRESSION_PROPERTY
			|| locationInParent == SwitchStatement.EXPRESSION_PROPERTY
			|| locationInParent == SwitchCase.EXPRESSION_PROPERTY
			|| locationInParent == ArrayAccess.INDEX_PROPERTY
			|| locationInParent == ThrowStatement.EXPRESSION_PROPERTY
			|| locationInParent == SynchronizedStatement.EXPRESSION_PROPERTY
			|| locationInParent == ParenthesizedExpression.EXPRESSION_PROPERTY) {
		return false;
	}
	return true;
}
 

public boolean visit(ForStatement node) {
	int position = 0;
	if(node.getExpression() != null){
		position = node.getExpression().getStartPosition();
	} else if(node.initializers() != null && node.initializers().size() > 0){
		position = ((ASTNode)node.initializers().get(0)).getStartPosition();
	} else if(node.updaters() != null && node.updaters().size() > 0){
		position = ((ASTNode)node.updaters().get(0)).getStartPosition();
	}
	int start = _unit.getLineNumber(position);
	if(start == _extendedLine){
		_extendedStatement = node;
		return false;
	}
	return true;
}
 

private static boolean isLastStatementInEnclosingMethodOrLambda(Statement statement) {
	ASTNode currentStructure= statement;
	ASTNode currentParent= statement.getParent();
	while (!(currentParent instanceof MethodDeclaration || currentParent instanceof LambdaExpression)) {
		// should not be in a loop
		if (currentParent instanceof ForStatement || currentParent instanceof EnhancedForStatement
				|| currentParent instanceof WhileStatement || currentParent instanceof DoStatement) {
			return false;
		}
		if (currentParent instanceof Block) {
			Block parentBlock= (Block) currentParent;
			if (parentBlock.statements().indexOf(currentStructure) != parentBlock.statements().size() - 1) { // not last statement in the block
				return false;
			}
		}
		currentStructure= currentParent;
		currentParent= currentParent.getParent();
	}
	return true;
}
 

private static boolean getConvertIterableLoopProposal(IInvocationContext context, ASTNode node, Collection<ICommandAccess> resultingCollections) {
	ForStatement forStatement= getEnclosingForStatementHeader(node);
	if (forStatement == null)
		return false;

	if (resultingCollections == null)
		return true;

	IProposableFix fix= ConvertLoopFix.createConvertIterableLoopToEnhancedFix(context.getASTRoot(), forStatement);
	if (fix == null)
		return false;

	Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
	Map<String, String> options= new HashMap<String, String>();
	options.put(CleanUpConstants.CONTROL_STATMENTS_CONVERT_FOR_LOOP_TO_ENHANCED, CleanUpOptions.TRUE);
	ICleanUp cleanUp= new ConvertLoopCleanUp(options);
	FixCorrectionProposal proposal= new FixCorrectionProposal(fix, cleanUp, IProposalRelevance.CONVERT_ITERABLE_LOOP_TO_ENHANCED, image, context);
	proposal.setCommandId(CONVERT_FOR_LOOP_ID);

	resultingCollections.add(proposal);
	return true;
}
 

@Override
public IStatus satisfiesPreconditions() {
	ForStatement statement= getForStatement();
	CompilationUnit ast= (CompilationUnit)statement.getRoot();

	IJavaElement javaElement= ast.getJavaElement();
	if (javaElement == null)
		return ERROR_STATUS;

	if (!JavaModelUtil.is50OrHigher(javaElement.getJavaProject()))
		return ERROR_STATUS;

	if (!validateInitializers(statement))
		return ERROR_STATUS;

	if (!validateExpression(statement))
		return ERROR_STATUS;

	if (!validateUpdaters(statement))
		return ERROR_STATUS;

	if (!validateBody(statement))
		return ERROR_STATUS;

	return Status.OK_STATUS;
}
 

private ConvertLoopOperation getConvertOperation(ForStatement node) {

			Collection<String> usedNamesCollection= fUsedNames.values();
			String[] usedNames= usedNamesCollection.toArray(new String[usedNamesCollection.size()]);
			ConvertLoopOperation convertForLoopOperation= new ConvertForLoopOperation(node, usedNames, fMakeFinal);
			if (convertForLoopOperation.satisfiesPreconditions().isOK()) {
				if (fFindForLoopsToConvert) {
					fUsedNames.put(node, convertForLoopOperation.getIntroducedVariableName());
					return convertForLoopOperation;
				}
			} else if (fConvertIterableForLoops) {
				ConvertLoopOperation iterableConverter= new ConvertIterableLoopOperation(node, usedNames, fMakeFinal);
				if (iterableConverter.satisfiesPreconditions().isOK()) {
					fUsedNames.put(node, iterableConverter.getIntroducedVariableName());
					return iterableConverter;
				}
			}

			return null;
		}
 

private static boolean getConvertForLoopProposal(IInvocationContext context, ASTNode node, Collection<ICommandAccess> resultingCollections) {
	ForStatement forStatement= getEnclosingForStatementHeader(node);
	if (forStatement == null)
		return false;

	if (resultingCollections == null)
		return true;

	IProposableFix fix= ConvertLoopFix.createConvertForLoopToEnhancedFix(context.getASTRoot(), forStatement);
	if (fix == null)
		return false;

	Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
	Map<String, String> options= new HashMap<String, String>();
	options.put(CleanUpConstants.CONTROL_STATMENTS_CONVERT_FOR_LOOP_TO_ENHANCED, CleanUpOptions.TRUE);
	ICleanUp cleanUp= new ConvertLoopCleanUp(options);
	FixCorrectionProposal proposal= new FixCorrectionProposal(fix, cleanUp, IProposalRelevance.CONVERT_FOR_LOOP_TO_ENHANCED, image, context);
	proposal.setCommandId(CONVERT_FOR_LOOP_ID);

	resultingCollections.add(proposal);
	return true;
}
 

@Override
public void endVisit(ForStatement node) {
	ASTNode[] selectedNodes= getSelectedNodes();
	if (doAfterValidation(node, selectedNodes)) {
		boolean containsExpression= contains(selectedNodes, node.getExpression());
		boolean containsUpdaters= contains(selectedNodes, node.updaters());
		if (contains(selectedNodes, node.initializers()) && containsExpression) {
			invalidSelection(RefactoringCoreMessages.StatementAnalyzer_for_initializer_expression);
		} else if (containsExpression && containsUpdaters) {
			invalidSelection(RefactoringCoreMessages.StatementAnalyzer_for_expression_updater);
		} else if (containsUpdaters && contains(selectedNodes, node.getBody())) {
			invalidSelection(RefactoringCoreMessages.StatementAnalyzer_for_updater_body);
		}
	}
	super.endVisit(node);
}
 

@Override
public String getIntroducedVariableName() {
	if (fElementDeclaration != null) {
		return fElementDeclaration.getName().getIdentifier();
	} else {
		ForStatement forStatement= getForStatement();
		IJavaProject javaProject= ((CompilationUnit)forStatement.getRoot()).getJavaElement().getJavaProject();
		String[] proposals= getVariableNameProposals(fArrayAccess.resolveTypeBinding(), javaProject);
		return proposals[0];
	}
}
 

private SingleVariableDeclaration createParameterDeclaration(String parameterName, VariableDeclarationFragment fragement, Expression arrayAccess, ForStatement statement, ImportRewrite importRewrite, ASTRewrite rewrite, TextEditGroup group, LinkedProposalPositionGroup pg, boolean makeFinal) {
	CompilationUnit compilationUnit= (CompilationUnit)arrayAccess.getRoot();
	AST ast= compilationUnit.getAST();

	SingleVariableDeclaration result= ast.newSingleVariableDeclaration();

	SimpleName name= ast.newSimpleName(parameterName);
	pg.addPosition(rewrite.track(name), true);
	result.setName(name);

	ITypeBinding arrayTypeBinding= arrayAccess.resolveTypeBinding();
	Type type= importType(arrayTypeBinding.getElementType(), statement, importRewrite, compilationUnit);
	if (arrayTypeBinding.getDimensions() != 1) {
		type= ast.newArrayType(type, arrayTypeBinding.getDimensions() - 1);
	}
	result.setType(type);

	if (fragement != null) {
		VariableDeclarationStatement declaration= (VariableDeclarationStatement)fragement.getParent();
		ModifierRewrite.create(rewrite, result).copyAllModifiers(declaration, group);
	}
	if (makeFinal && (fragement == null || ASTNodes.findModifierNode(Modifier.FINAL, ASTNodes.getModifiers(fragement)) == null)) {
		ModifierRewrite.create(rewrite, result).setModifiers(Modifier.FINAL, 0, group);
	}

	return result;
}
 

@Override
protected Statement convert(CompilationUnitRewrite cuRewrite, TextEditGroup group, LinkedProposalModel positionGroups) throws CoreException {
	ASTRewrite rewrite= cuRewrite.getASTRewrite();
	ImportRewrite importRewrite= cuRewrite.getImportRewrite();

	ForStatement forStatement= getForStatement();

	IJavaProject javaProject= ((CompilationUnit)forStatement.getRoot()).getJavaElement().getJavaProject();
	String[] proposals= getVariableNameProposals(fArrayAccess.resolveTypeBinding(), javaProject);

	String parameterName;
	if (fElementDeclaration != null) {
		parameterName= fElementDeclaration.getName().getIdentifier();
	} else {
		parameterName= proposals[0];
	}

	LinkedProposalPositionGroup pg= positionGroups.getPositionGroup(parameterName, true);
	if (fElementDeclaration != null)
		pg.addProposal(parameterName, null, 10);
	for (int i= 0; i < proposals.length; i++) {
		pg.addProposal(proposals[i], null, 10);
	}

	AST ast= forStatement.getAST();
	EnhancedForStatement result= ast.newEnhancedForStatement();

	SingleVariableDeclaration parameterDeclaration= createParameterDeclaration(parameterName, fElementDeclaration, fArrayAccess, forStatement, importRewrite, rewrite, group, pg, fMakeFinal);
	result.setParameter(parameterDeclaration);

	result.setExpression((Expression)rewrite.createCopyTarget(fArrayAccess));

	convertBody(forStatement.getBody(), fIndexBinding, fArrayBinding, parameterName, rewrite, group, pg);
	result.setBody(getBody(cuRewrite, group, positionGroups));

	positionGroups.setEndPosition(rewrite.track(result));

	return result;
}
 

private static Expression getBooleanExpression(ASTNode node) {
	if (!(node instanceof Expression)) {
		return null;
	}

	// check if the node is a location where it can be negated
	StructuralPropertyDescriptor locationInParent= node.getLocationInParent();
	if (locationInParent == QualifiedName.NAME_PROPERTY) {
		node= node.getParent();
		locationInParent= node.getLocationInParent();
	}
	while (locationInParent == ParenthesizedExpression.EXPRESSION_PROPERTY) {
		node= node.getParent();
		locationInParent= node.getLocationInParent();
	}
	Expression expression= (Expression) node;
	if (!isBoolean(expression)) {
		return null;
	}
	if (expression.getParent() instanceof InfixExpression) {
		return expression;
	}
	if (locationInParent == Assignment.RIGHT_HAND_SIDE_PROPERTY || locationInParent == IfStatement.EXPRESSION_PROPERTY
			|| locationInParent == WhileStatement.EXPRESSION_PROPERTY || locationInParent == DoStatement.EXPRESSION_PROPERTY
			|| locationInParent == ReturnStatement.EXPRESSION_PROPERTY || locationInParent == ForStatement.EXPRESSION_PROPERTY
			|| locationInParent == AssertStatement.EXPRESSION_PROPERTY || locationInParent == MethodInvocation.ARGUMENTS_PROPERTY
			|| locationInParent == ConstructorInvocation.ARGUMENTS_PROPERTY || locationInParent == SuperMethodInvocation.ARGUMENTS_PROPERTY
			|| locationInParent == EnumConstantDeclaration.ARGUMENTS_PROPERTY || locationInParent == SuperConstructorInvocation.ARGUMENTS_PROPERTY
			|| locationInParent == ClassInstanceCreation.ARGUMENTS_PROPERTY || locationInParent == ConditionalExpression.EXPRESSION_PROPERTY
			|| locationInParent == PrefixExpression.OPERAND_PROPERTY) {
		return expression;
	}
	return null;
}
 

@Override
public void endVisit(ForStatement node) {
	if (fFindForLoopsToConvert || fConvertIterableForLoops) {
		fUsedNames.remove(node);
	}
	super.endVisit(node);
}
 

public ControlStatementFinder(boolean findForLoopsToConvert, boolean convertIterableForLoops, boolean makeFinal, List<ConvertLoopOperation> resultingCollection) {
	fFindForLoopsToConvert= findForLoopsToConvert;
	fConvertIterableForLoops= convertIterableForLoops;
	fMakeFinal= makeFinal;
	fResult= resultingCollection;
	fUsedNames= new Hashtable<ForStatement, String>();
}
 

public boolean visit(ForStatement stmnt) {
	/*
	 * for (
                       [ ForInit ];
                       [ Expression ] ;
                       [ ForUpdate ] )
                       Statement
	 */
	styledString.append("for", new StyledStringStyler(keywordStyle));
	appendSpace();
	appendOpenParenthesis();
	// Handle Initializers
	for (int i = 0; i < stmnt.initializers().size(); i++) {
		handleExpression((Expression) stmnt.initializers().get(i));
		if(i < stmnt.initializers().size() - 1) {
			appendComma();
		}
	}
	appendSemicolon();
	appendSpace();
	handleExpression(stmnt.getExpression());
	appendSemicolon();
	appendSpace();
	// Handle Updaters
	for (int i = 0; i < stmnt.updaters().size(); i++) {
		handleExpression((Expression) stmnt.updaters().get(i));
		if(i < stmnt.updaters().size() - 1) {
			appendComma();
		}
	}
	appendClosedParenthesis();
	return false;
}
 

@Override
public boolean visit(ForStatement node) {
	if (isInside(node)) {
		node.getBody().accept(this);
		visitBackwards(node.initializers());
	}
	return false;
}
 

@Override
public void endVisit(ForStatement node) {
	if (getSelection().getEndVisitSelectionMode(node) == Selection.AFTER) {
		if (node.initializers().contains(getFirstSelectedNode())) {
			invalidSelection(RefactoringCoreMessages.ExtractMethodAnalyzer_cannot_extract_for_initializer, JavaStatusContext.create(fCUnit, getSelection()));
		} else if (node.updaters().contains(getLastSelectedNode())) {
			invalidSelection(RefactoringCoreMessages.ExtractMethodAnalyzer_cannot_extract_for_updater, JavaStatusContext.create(fCUnit, getSelection()));
		}
	}
	super.endVisit(node);
}
 

private void insertAt(ASTNode target, Statement declaration) {
	ASTRewrite rewrite= fCURewrite.getASTRewrite();
	TextEditGroup groupDescription= fCURewrite.createGroupDescription(RefactoringCoreMessages.ExtractTempRefactoring_declare_local_variable);

	ASTNode parent= target.getParent();
	StructuralPropertyDescriptor locationInParent= target.getLocationInParent();
	while (locationInParent != Block.STATEMENTS_PROPERTY && locationInParent != SwitchStatement.STATEMENTS_PROPERTY) {
		if (locationInParent == IfStatement.THEN_STATEMENT_PROPERTY
				|| locationInParent == IfStatement.ELSE_STATEMENT_PROPERTY
				|| locationInParent == ForStatement.BODY_PROPERTY
				|| locationInParent == EnhancedForStatement.BODY_PROPERTY
				|| locationInParent == DoStatement.BODY_PROPERTY
				|| locationInParent == WhileStatement.BODY_PROPERTY) {
			// create intermediate block if target was the body property of a control statement:
			Block replacement= rewrite.getAST().newBlock();
			ListRewrite replacementRewrite= rewrite.getListRewrite(replacement, Block.STATEMENTS_PROPERTY);
			replacementRewrite.insertFirst(declaration, null);
			replacementRewrite.insertLast(rewrite.createMoveTarget(target), null);
			rewrite.replace(target, replacement, groupDescription);
			return;
		}
		target= parent;
		parent= parent.getParent();
		locationInParent= target.getLocationInParent();
	}
	ListRewrite listRewrite= rewrite.getListRewrite(parent, (ChildListPropertyDescriptor)locationInParent);
	listRewrite.insertBefore(declaration, target, groupDescription);
}
 

private static boolean isUsedInForInitializerOrUpdater(Expression expression) {
	ASTNode parent= expression.getParent();
	if (parent instanceof ForStatement) {
		ForStatement forStmt= (ForStatement) parent;
		return forStmt.initializers().contains(expression) || forStmt.updaters().contains(expression);
	}
	return false;
}
 

@Override
public void endVisit(ForStatement node) {
	if (skipNode(node))
		return;
	ForFlowInfo forInfo= createFor();
	setFlowInfo(node, forInfo);
	forInfo.mergeInitializer(createSequential(node.initializers()), fFlowContext);
	forInfo.mergeCondition(getFlowInfo(node.getExpression()), fFlowContext);
	forInfo.mergeAction(getFlowInfo(node.getBody()), fFlowContext);
	// Increments are executed after the action.
	forInfo.mergeIncrement(createSequential(node.updaters()), fFlowContext);
	forInfo.removeLabel(null);
}
 

public static ConvertLoopFix createConvertIterableLoopToEnhancedFix(CompilationUnit compilationUnit, ForStatement loop) {
	ConvertIterableLoopOperation loopConverter= new ConvertIterableLoopOperation(loop);
	IStatus status= loopConverter.satisfiesPreconditions();
	if (status.getSeverity() == IStatus.ERROR)
		return null;

	return new ConvertLoopFix(FixMessages.Java50Fix_ConvertToEnhancedForLoop_description, compilationUnit, new CompilationUnitRewriteOperation[] {loopConverter}, status);
}