org.eclipse.jdt.ui/core refactoring/org/eclipse/jdt/internal/corext/refactoring/rename/RenameLocalVariableProcessor.java - jdt/eclipse.jdt.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jdt.internal.corext.refactoring.rename;

 import java.util.HashMap;
 import java.util.Map;
 import java.util.StringTokenizer;

 import org.eclipse.text.edits.MultiTextEdit;
 import org.eclipse.text.edits.ReplaceEdit;
 import org.eclipse.text.edits.TextEdit;
 import org.eclipse.text.edits.TextEditGroup;

 import org.eclipse.core.runtime.Assert;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.OperationCanceledException;

 import org.eclipse.core.resources.IFile;

 import org.eclipse.ltk.core.refactoring.Change;
 import org.eclipse.ltk.core.refactoring.GroupCategorySet;
 import org.eclipse.ltk.core.refactoring.RefactoringDescriptor;
 import org.eclipse.ltk.core.refactoring.RefactoringStatus;
 import org.eclipse.ltk.core.refactoring.TextChange;
 import org.eclipse.ltk.core.refactoring.participants.CheckConditionsContext;
 import org.eclipse.ltk.core.refactoring.participants.RefactoringArguments;
 import org.eclipse.ltk.core.refactoring.participants.RenameArguments;

 import org.eclipse.jdt.core.ICompilationUnit;
 import org.eclipse.jdt.core.IJavaElement;
 import org.eclipse.jdt.core.IJavaProject;
 import org.eclipse.jdt.core.ILocalVariable;
 import org.eclipse.jdt.core.IMethod;
 import org.eclipse.jdt.core.ISourceRange;
 import org.eclipse.jdt.core.JavaModelException;
 import org.eclipse.jdt.core.dom.ASTNode;
 import org.eclipse.jdt.core.dom.CompilationUnit;
 import org.eclipse.jdt.core.dom.Initializer;
 import org.eclipse.jdt.core.dom.MethodDeclaration;
 import org.eclipse.jdt.core.dom.VariableDeclaration;

 import org.eclipse.jdt.internal.corext.dom.NodeFinder;
 import org.eclipse.jdt.internal.corext.refactoring.Checks;
 import org.eclipse.jdt.internal.corext.refactoring.JavaRefactoringArguments;
 import org.eclipse.jdt.internal.corext.refactoring.JavaRefactoringDescriptor;
 import org.eclipse.jdt.internal.corext.refactoring.JavaRefactoringDescriptorComment;
 import org.eclipse.jdt.internal.corext.refactoring.RefactoringAvailabilityTester;
 import org.eclipse.jdt.internal.corext.refactoring.RefactoringCoreMessages;
 import org.eclipse.jdt.internal.corext.refactoring.changes.CompilationUnitChange;
 import org.eclipse.jdt.internal.corext.refactoring.changes.RefactoringDescriptorChange;
 import org.eclipse.jdt.internal.corext.refactoring.changes.TextChangeCompatibility;
 import org.eclipse.jdt.internal.corext.refactoring.code.ScriptableRefactoring;
 import org.eclipse.jdt.internal.corext.refactoring.participants.JavaProcessors;
 import org.eclipse.jdt.internal.corext.refactoring.rename.RenameAnalyzeUtil.LocalAnalyzePackage;
 import org.eclipse.jdt.internal.corext.refactoring.tagging.INameUpdating;
 import org.eclipse.jdt.internal.corext.refactoring.tagging.IReferenceUpdating;
 import org.eclipse.jdt.internal.corext.refactoring.util.RefactoringASTParser;
 import org.eclipse.jdt.internal.corext.refactoring.util.ResourceUtil;
 import org.eclipse.jdt.internal.corext.refactoring.util.TextChangeManager;
 import org.eclipse.jdt.internal.corext.util.Messages;

 import org.eclipse.jdt.ui.JavaElementLabels;

 import org.eclipse.jdt.internal.ui.JavaPlugin;

 public class RenameLocalVariableProcessor extends JavaRenameProcessor implements INameUpdating, IReferenceUpdating {

 	private static final String ID_RENAME_LOCAL_VARIABLE= "org.eclipse.jdt.ui.rename.local.variable"; //$NON-NLS-1$
 	private static final String ATTRIBUTE_REFERENCES= "references"; //$NON-NLS-1$

 	private ILocalVariable fLocalVariable;
 	private ICompilationUnit fCu;

 	//the following fields are set or modified after the construction
 	private boolean fUpdateReferences;
 	private String fCurrentName;
 	private String fNewName;
 	private CompilationUnit fCompilationUnitNode;
 	private VariableDeclaration fTempDeclarationNode;
 	private TextChange fChange;

 	private boolean fIsComposite;
 	private GroupCategorySet fCategorySet;
 	private TextChangeManager fChangeManager;
 	private RenameAnalyzeUtil.LocalAnalyzePackage fLocalAnalyzePackage;

 	public static final String IDENTIFIER= "org.eclipse.jdt.ui.renameLocalVariableProcessor"; //$NON-NLS-1$

 	/**
 	 * Creates a new rename local variable processor.
 	 * @param localVariable the local variable, or <code>null</code> if invoked by scripting
 	 */
 	public RenameLocalVariableProcessor(ILocalVariable localVariable) {
 		fLocalVariable= localVariable;
 		fUpdateReferences= true;
 		if (localVariable != null)
 			fCu= (ICompilationUnit) localVariable.getAncestor(IJavaElement.COMPILATION_UNIT);
 		fNewName= ""; //$NON-NLS-1$
 		fIsComposite= false;
 	}

 	/**
 	 * Creates a new rename local variable processor.
 	 * <p>
 	 * This constructor is only used by <code>RenameTypeProcessor</code>.
 	 * </p>
 	 *
 	 * @param localVariable the local variable
 	 * @param manager the change manager
 	 * @param node the compilation unit node
 	 * @param categorySet the group category set
 	 */
 	RenameLocalVariableProcessor(ILocalVariable localVariable, TextChangeManager manager, CompilationUnit node, GroupCategorySet categorySet) {
 		this(localVariable);
 		fChangeManager= manager;
 		fCategorySet= categorySet;
 		fCompilationUnitNode= node;
 		fIsComposite= true;
 	}

 	/*
 	 * @see org.eclipse.jdt.internal.corext.refactoring.rename.JavaRenameProcessor#needsSavedEditors()
 	 */
 	public boolean needsSavedEditors() {
 		return false;
 	}

 	/*
 	 * @see org.eclipse.jdt.internal.corext.refactoring.rename.JavaRenameProcessor#getAffectedProjectNatures()
 	 */
 	protected final String[] getAffectedProjectNatures() throws CoreException {
 		return JavaProcessors.computeAffectedNatures(fLocalVariable);
 	}

 	/*
 	 * @see org.eclipse.ltk.core.refactoring.participants.RefactoringProcessor#getElements()
 	 */
 	public Object[] getElements() {
 		return new Object[] { fLocalVariable };
 	}

 	/*
 	 * @see org.eclipse.ltk.core.refactoring.participants.RefactoringProcessor#getIdentifier()
 	 */
 	public String getIdentifier() {
 		return IDENTIFIER;
 	}

 	/*
 	 * @see org.eclipse.ltk.core.refactoring.participants.RefactoringProcessor#getProcessorName()
 	 */
 	public String getProcessorName() {
 		return RefactoringCoreMessages.RenameTempRefactoring_rename;
 	}

 	/*
 	 * @see org.eclipse.ltk.core.refactoring.participants.RefactoringProcessor#isApplicable()
 	 */
 	public boolean isApplicable() throws CoreException {
 		return RefactoringAvailabilityTester.isRenameAvailable(fLocalVariable);
 	}

 	/*
 	 * @see org.eclipse.jdt.internal.corext.refactoring.tagging.IReferenceUpdating#canEnableUpdateReferences()
 	 */
 	public boolean canEnableUpdateReferences() {
 		return true;
 	}

 	/*
 	 * @see org.eclipse.jdt.internal.corext.refactoring.rename.JavaRenameProcessor#getUpdateReferences()
 	 */
 	public boolean getUpdateReferences() {
 		return fUpdateReferences;
 	}

 	/*
 	 * @see org.eclipse.jdt.internal.corext.refactoring.tagging.IReferenceUpdating#setUpdateReferences(boolean)
 	 */
 	public void setUpdateReferences(boolean updateReferences) {
 		fUpdateReferences= updateReferences;
 	}

 	/*
 	 * @see org.eclipse.jdt.internal.corext.refactoring.tagging.INameUpdating#getCurrentElementName()
 	 */
 	public String getCurrentElementName() {
 		return fCurrentName;
 	}

 	/*
 	 * @see org.eclipse.jdt.internal.corext.refactoring.tagging.INameUpdating#getNewElementName()
 	 */
 	public String getNewElementName() {
 		return fNewName;
 	}

 	/*
 	 * @see org.eclipse.jdt.internal.corext.refactoring.tagging.INameUpdating#setNewElementName(java.lang.String)
 	 */
 	public void setNewElementName(String newName) {
 		Assert.isNotNull(newName);
 		fNewName= newName;
 	}

 	/*
 	 * @see org.eclipse.jdt.internal.corext.refactoring.tagging.INameUpdating#getNewElement()
 	 */
 	public Object getNewElement() {
 		return null; //cannot create an ILocalVariable
 	}

 	public RefactoringStatus checkInitialConditions(IProgressMonitor pm) throws CoreException {
 		initAST();
 		if (fTempDeclarationNode == null || fTempDeclarationNode.resolveBinding() == null)
 			return RefactoringStatus.createFatalErrorStatus(RefactoringCoreMessages.RenameTempRefactoring_must_select_local);
 		if (! Checks.isDeclaredIn(fTempDeclarationNode, MethodDeclaration.class)
 		 && ! Checks.isDeclaredIn(fTempDeclarationNode, Initializer.class))
 			return RefactoringStatus.createFatalErrorStatus(RefactoringCoreMessages.RenameTempRefactoring_only_in_methods_and_initializers);

 		initNames();
 		return new RefactoringStatus();
 	}

 	private void initAST() throws JavaModelException {
 		if (!fIsComposite)
 			fCompilationUnitNode= RefactoringASTParser.parseWithASTProvider(fCu, true, null);
 		ISourceRange sourceRange= fLocalVariable.getNameRange();
 		ASTNode name= NodeFinder.perform(fCompilationUnitNode, sourceRange);
 		if (name == null)
 			return;
 		if (name.getParent() instanceof VariableDeclaration)
 			fTempDeclarationNode= (VariableDeclaration) name.getParent();
 	}

 	private void initNames(){
 		fCurrentName= fTempDeclarationNode.getName().getIdentifier();
 	}

 	protected RenameModifications computeRenameModifications() throws CoreException {
 		RenameModifications result= new RenameModifications();
 		result.rename(fLocalVariable, new RenameArguments(getNewElementName(), getUpdateReferences()));
 		return result;
 	}

 	protected IFile[] getChangedFiles() throws CoreException {
 		return new IFile[] {ResourceUtil.getFile(fCu)};
 	}

 	protected RefactoringStatus doCheckFinalConditions(IProgressMonitor pm, CheckConditionsContext context)
 			throws CoreException, OperationCanceledException {
 		try {
 			pm.beginTask("", 1);	 //$NON-NLS-1$

 			RefactoringStatus result= checkNewElementName(fNewName);
 			if (result.hasFatalError())
 				return result;
 			createEdits();
 			if (!fIsComposite) {
 				LocalAnalyzePackage[] localAnalyzePackages= new RenameAnalyzeUtil.LocalAnalyzePackage[] { fLocalAnalyzePackage };
 				result.merge(RenameAnalyzeUtil.analyzeLocalRenames(localAnalyzePackages, fChange, fCompilationUnitNode, true));
 			}
 			return result;
 		} finally {
 			pm.done();
 			if (fIsComposite) {
 				// end of life cycle for this processor
 				fChange= null;
 				fCompilationUnitNode= null;
 				fTempDeclarationNode= null;
 			}
 		}
 	}

 	/*
 	 * @see org.eclipse.jdt.internal.corext.refactoring.tagging.INameUpdating#checkNewElementName(java.lang.String)
 	 */
 	public RefactoringStatus checkNewElementName(String newName) throws JavaModelException {
 		RefactoringStatus result= Checks.checkFieldName(newName);
 		if (! Checks.startsWithLowerCase(newName))
 			if (fIsComposite) {
 				final String nameOfParent= (fLocalVariable.getParent() instanceof IMethod) ? fLocalVariable.getParent().getElementName() : RefactoringCoreMessages.JavaElementUtil_initializer;
 				final String nameOfType= fLocalVariable.getAncestor(IJavaElement.TYPE).getElementName();
 				result.addWarning(Messages.format(RefactoringCoreMessages.RenameTempRefactoring_lowercase2, new String[] { newName, nameOfParent, nameOfType }));
 			} else {
 				result.addWarning(RefactoringCoreMessages.RenameTempRefactoring_lowercase);
 			}
 		return result;
 	}

 	private void createEdits() {
 		TextEdit declarationEdit= createRenameEdit(fTempDeclarationNode.getName().getStartPosition());
 		TextEdit[] allRenameEdits= getAllRenameEdits(declarationEdit);

 		TextEdit[] allUnparentedRenameEdits= new TextEdit[allRenameEdits.length];
 		TextEdit unparentedDeclarationEdit= null;

 		fChange= new CompilationUnitChange(RefactoringCoreMessages.RenameTempRefactoring_rename, fCu);
 		MultiTextEdit rootEdit= new MultiTextEdit();
 		fChange.setEdit(rootEdit);
 		fChange.setKeepPreviewEdits(true);

 		for (int i= 0; i < allRenameEdits.length; i++) {
 			if (fIsComposite) {
 				// Add a copy of the text edit (text edit may only have one
 				// parent) to keep problem reporting code clean
 				TextChangeCompatibility.addTextEdit(fChangeManager.get(fCu), RefactoringCoreMessages.RenameTempRefactoring_changeName, allRenameEdits[i].copy(), fCategorySet);

 				// Add a separate copy for problem reporting
 				allUnparentedRenameEdits[i]= allRenameEdits[i].copy();
 				if (allRenameEdits[i].equals(declarationEdit))
 					unparentedDeclarationEdit= allUnparentedRenameEdits[i];
 			}
 			rootEdit.addChild(allRenameEdits[i]);
 			fChange.addTextEditGroup(new TextEditGroup(RefactoringCoreMessages.RenameTempRefactoring_changeName, allRenameEdits[i]));
 		}

 		// store information for analysis
 		if (fIsComposite) {
 			fLocalAnalyzePackage= new RenameAnalyzeUtil.LocalAnalyzePackage(unparentedDeclarationEdit, allUnparentedRenameEdits);
 		} else
 			fLocalAnalyzePackage= new RenameAnalyzeUtil.LocalAnalyzePackage(declarationEdit, allRenameEdits);
 	}

 	private TextEdit[] getAllRenameEdits(TextEdit declarationEdit) {
 		if (! fUpdateReferences)
 			return new TextEdit[] { declarationEdit };

 		TempOccurrenceAnalyzer fTempAnalyzer= new TempOccurrenceAnalyzer(fTempDeclarationNode, true);
 		fTempAnalyzer.perform();
 		int[] referenceOffsets= fTempAnalyzer.getReferenceAndJavadocOffsets();

 		TextEdit[] allRenameEdits= new TextEdit[referenceOffsets.length + 1];
 		for (int i= 0; i < referenceOffsets.length; i++)
 			allRenameEdits[i]= createRenameEdit(referenceOffsets[i]);
 		allRenameEdits[referenceOffsets.length]= declarationEdit;
 		return allRenameEdits;
 	}

 	private TextEdit createRenameEdit(int offset) {
 		return new ReplaceEdit(offset, fCurrentName.length(), fNewName);
 	}

 	public Change createChange(IProgressMonitor monitor) throws CoreException {
 		try {
 			Change change= fChange;
 			if (change != null) {
 				final ISourceRange range= fLocalVariable.getNameRange();
 				final Map arguments= new HashMap();
 				String project= null;
 				IJavaProject javaProject= fCu.getJavaProject();
 				if (javaProject != null)
 					project= javaProject.getElementName();
 				final String header= Messages.format(RefactoringCoreMessages.RenameLocalVariableProcessor_descriptor_description, new String[] { fCurrentName, JavaElementLabels.getElementLabel(fLocalVariable.getParent(), JavaElementLabels.ALL_FULLY_QUALIFIED), fNewName});
 				final String description= Messages.format(RefactoringCoreMessages.RenameLocalVariableProcessor_descriptor_description_short, fCurrentName);
 				final String comment= new JavaRefactoringDescriptorComment(this, header).asString();
 				final JavaRefactoringDescriptor descriptor= new JavaRefactoringDescriptor(ID_RENAME_LOCAL_VARIABLE, project, description, comment, arguments, RefactoringDescriptor.NONE);
 				arguments.put(JavaRefactoringDescriptor.ATTRIBUTE_INPUT, descriptor.elementToHandle(fCu));
 				arguments.put(JavaRefactoringDescriptor.ATTRIBUTE_NAME, getNewElementName());
 				arguments.put(JavaRefactoringDescriptor.ATTRIBUTE_SELECTION, new Integer(range.getOffset()).toString() + " " + new Integer(range.getLength()).toString()); //$NON-NLS-1$
 				arguments.put(ATTRIBUTE_REFERENCES, Boolean.valueOf(fUpdateReferences).toString());
 				final RefactoringDescriptorChange result= new RefactoringDescriptorChange(descriptor, RefactoringCoreMessages.RenameTempRefactoring_rename, new Change[] { change});
 				result.markAsSynthetic();
 				change= result;
 			}
 			return change;
 		} finally {
 			monitor.done();
 		}
 	}

 	public RefactoringStatus initialize(RefactoringArguments arguments) {
 		if (arguments instanceof JavaRefactoringArguments) {
 			final JavaRefactoringArguments extended= (JavaRefactoringArguments) arguments;
 			final String handle= extended.getAttribute(JavaRefactoringDescriptor.ATTRIBUTE_INPUT);
 			if (handle != null) {
 				final IJavaElement element= JavaRefactoringDescriptor.handleToElement(extended.getProject(), handle, false);
 				if (element == null || !element.exists() || element.getElementType() != IJavaElement.COMPILATION_UNIT)
 					return ScriptableRefactoring.createInputFatalStatus(element, getRefactoring().getName(), ID_RENAME_LOCAL_VARIABLE);
 				else
 					fCu= (ICompilationUnit) element;
 			} else
 				return RefactoringStatus.createFatalErrorStatus(Messages.format(RefactoringCoreMessages.InitializableRefactoring_argument_not_exist, JavaRefactoringDescriptor.ATTRIBUTE_INPUT));
 			final String name= extended.getAttribute(JavaRefactoringDescriptor.ATTRIBUTE_NAME);
 			if (name != null && !"".equals(name)) //$NON-NLS-1$
 				setNewElementName(name);
 			else
 				return RefactoringStatus.createFatalErrorStatus(Messages.format(RefactoringCoreMessages.InitializableRefactoring_argument_not_exist, JavaRefactoringDescriptor.ATTRIBUTE_NAME));
 			if (fCu != null) {
 				final String selection= extended.getAttribute(JavaRefactoringDescriptor.ATTRIBUTE_SELECTION);
 				if (selection != null) {
 					int offset= -1;
 					int length= -1;
 					final StringTokenizer tokenizer= new StringTokenizer(selection);
 					if (tokenizer.hasMoreTokens())
 						offset= Integer.valueOf(tokenizer.nextToken()).intValue();
 					if (tokenizer.hasMoreTokens())
 						length= Integer.valueOf(tokenizer.nextToken()).intValue();
 					if (offset >= 0 && length >= 0) {
 						try {
 							final IJavaElement[] elements= fCu.codeSelect(offset, length);
 							if (elements != null) {
 								for (int index= 0; index < elements.length; index++) {
 									final IJavaElement element= elements[index];
 									if (element instanceof ILocalVariable)
 										fLocalVariable= (ILocalVariable) element;
 								}
 							}
 							if (fLocalVariable == null)
 								return ScriptableRefactoring.createInputFatalStatus(null, getRefactoring().getName(), ID_RENAME_LOCAL_VARIABLE);
 						} catch (JavaModelException exception) {
 							JavaPlugin.log(exception);
 						}
 					} else
 						return RefactoringStatus.createFatalErrorStatus(Messages.format(RefactoringCoreMessages.InitializableRefactoring_illegal_argument, new Object[] { selection, JavaRefactoringDescriptor.ATTRIBUTE_SELECTION}));
 				} else
 					return RefactoringStatus.createFatalErrorStatus(Messages.format(RefactoringCoreMessages.InitializableRefactoring_argument_not_exist, JavaRefactoringDescriptor.ATTRIBUTE_SELECTION));
 			}
 			final String references= extended.getAttribute(ATTRIBUTE_REFERENCES);
 			if (references != null) {
 				fUpdateReferences= Boolean.valueOf(references).booleanValue();
 			} else
 				return RefactoringStatus.createFatalErrorStatus(Messages.format(RefactoringCoreMessages.InitializableRefactoring_argument_not_exist, ATTRIBUTE_REFERENCES));
 		} else
 			return RefactoringStatus.createFatalErrorStatus(RefactoringCoreMessages.InitializableRefactoring_inacceptable_arguments);
 		return new RefactoringStatus();
 	}

 	public RenameAnalyzeUtil.LocalAnalyzePackage getLocalAnalyzePackage() {
 		return fLocalAnalyzePackage;
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2006 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jdt.internal.corext.refactoring.rename;

	import java.util.HashMap;
	import java.util.Map;
	import java.util.StringTokenizer;

	import org.eclipse.text.edits.MultiTextEdit;
	import org.eclipse.text.edits.ReplaceEdit;
	import org.eclipse.text.edits.TextEdit;
	import org.eclipse.text.edits.TextEditGroup;

	import org.eclipse.core.runtime.Assert;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IProgressMonitor;
	import org.eclipse.core.runtime.OperationCanceledException;

	import org.eclipse.core.resources.IFile;

	import org.eclipse.ltk.core.refactoring.Change;
	import org.eclipse.ltk.core.refactoring.GroupCategorySet;
	import org.eclipse.ltk.core.refactoring.RefactoringDescriptor;
	import org.eclipse.ltk.core.refactoring.RefactoringStatus;
	import org.eclipse.ltk.core.refactoring.TextChange;
	import org.eclipse.ltk.core.refactoring.participants.CheckConditionsContext;
	import org.eclipse.ltk.core.refactoring.participants.RefactoringArguments;
	import org.eclipse.ltk.core.refactoring.participants.RenameArguments;

	import org.eclipse.jdt.core.ICompilationUnit;
	import org.eclipse.jdt.core.IJavaElement;
	import org.eclipse.jdt.core.IJavaProject;
	import org.eclipse.jdt.core.ILocalVariable;
	import org.eclipse.jdt.core.IMethod;
	import org.eclipse.jdt.core.ISourceRange;
	import org.eclipse.jdt.core.JavaModelException;
	import org.eclipse.jdt.core.dom.ASTNode;
	import org.eclipse.jdt.core.dom.CompilationUnit;
	import org.eclipse.jdt.core.dom.Initializer;
	import org.eclipse.jdt.core.dom.MethodDeclaration;
	import org.eclipse.jdt.core.dom.VariableDeclaration;

	import org.eclipse.jdt.internal.corext.dom.NodeFinder;
	import org.eclipse.jdt.internal.corext.refactoring.Checks;
	import org.eclipse.jdt.internal.corext.refactoring.JavaRefactoringArguments;
	import org.eclipse.jdt.internal.corext.refactoring.JavaRefactoringDescriptor;
	import org.eclipse.jdt.internal.corext.refactoring.JavaRefactoringDescriptorComment;
	import org.eclipse.jdt.internal.corext.refactoring.RefactoringAvailabilityTester;
	import org.eclipse.jdt.internal.corext.refactoring.RefactoringCoreMessages;
	import org.eclipse.jdt.internal.corext.refactoring.changes.CompilationUnitChange;
	import org.eclipse.jdt.internal.corext.refactoring.changes.RefactoringDescriptorChange;
	import org.eclipse.jdt.internal.corext.refactoring.changes.TextChangeCompatibility;
	import org.eclipse.jdt.internal.corext.refactoring.code.ScriptableRefactoring;
	import org.eclipse.jdt.internal.corext.refactoring.participants.JavaProcessors;
	import org.eclipse.jdt.internal.corext.refactoring.rename.RenameAnalyzeUtil.LocalAnalyzePackage;
	import org.eclipse.jdt.internal.corext.refactoring.tagging.INameUpdating;
	import org.eclipse.jdt.internal.corext.refactoring.tagging.IReferenceUpdating;
	import org.eclipse.jdt.internal.corext.refactoring.util.RefactoringASTParser;
	import org.eclipse.jdt.internal.corext.refactoring.util.ResourceUtil;
	import org.eclipse.jdt.internal.corext.refactoring.util.TextChangeManager;
	import org.eclipse.jdt.internal.corext.util.Messages;

	import org.eclipse.jdt.ui.JavaElementLabels;

	import org.eclipse.jdt.internal.ui.JavaPlugin;

	public class RenameLocalVariableProcessor extends JavaRenameProcessor implements INameUpdating, IReferenceUpdating {

	private static final String ID_RENAME_LOCAL_VARIABLE= "org.eclipse.jdt.ui.rename.local.variable"; //$NON-NLS-1$
	private static final String ATTRIBUTE_REFERENCES= "references"; //$NON-NLS-1$

	private ILocalVariable fLocalVariable;
	private ICompilationUnit fCu;

	//the following fields are set or modified after the construction
	private boolean fUpdateReferences;
	private String fCurrentName;
	private String fNewName;
	private CompilationUnit fCompilationUnitNode;
	private VariableDeclaration fTempDeclarationNode;
	private TextChange fChange;

	private boolean fIsComposite;
	private GroupCategorySet fCategorySet;
	private TextChangeManager fChangeManager;
	private RenameAnalyzeUtil.LocalAnalyzePackage fLocalAnalyzePackage;

	public static final String IDENTIFIER= "org.eclipse.jdt.ui.renameLocalVariableProcessor"; //$NON-NLS-1$

	/**
	* Creates a new rename local variable processor.
	* @param localVariable the local variable, or <code>null</code> if invoked by scripting
	*/
	public RenameLocalVariableProcessor(ILocalVariable localVariable) {
	fLocalVariable= localVariable;
	fUpdateReferences= true;
	if (localVariable != null)
	fCu= (ICompilationUnit) localVariable.getAncestor(IJavaElement.COMPILATION_UNIT);
	fNewName= ""; //$NON-NLS-1$
	fIsComposite= false;
	}

	/**
	* Creates a new rename local variable processor.
	* <p>
	* This constructor is only used by <code>RenameTypeProcessor</code>.
	* </p>
	*
	* @param localVariable the local variable
	* @param manager the change manager
	* @param node the compilation unit node
	* @param categorySet the group category set
	*/
	RenameLocalVariableProcessor(ILocalVariable localVariable, TextChangeManager manager, CompilationUnit node, GroupCategorySet categorySet) {
	this(localVariable);
	fChangeManager= manager;
	fCategorySet= categorySet;
	fCompilationUnitNode= node;
	fIsComposite= true;
	}

	/*
	* @see org.eclipse.jdt.internal.corext.refactoring.rename.JavaRenameProcessor#needsSavedEditors()
	*/
	public boolean needsSavedEditors() {
	return false;
	}

	/*
	* @see org.eclipse.jdt.internal.corext.refactoring.rename.JavaRenameProcessor#getAffectedProjectNatures()
	*/
	protected final String[] getAffectedProjectNatures() throws CoreException {
	return JavaProcessors.computeAffectedNatures(fLocalVariable);
	}

	/*
	* @see org.eclipse.ltk.core.refactoring.participants.RefactoringProcessor#getElements()
	*/
	public Object[] getElements() {
	return new Object[] { fLocalVariable };
	}

	/*
	* @see org.eclipse.ltk.core.refactoring.participants.RefactoringProcessor#getIdentifier()
	*/
	public String getIdentifier() {
	return IDENTIFIER;
	}

	/*
	* @see org.eclipse.ltk.core.refactoring.participants.RefactoringProcessor#getProcessorName()
	*/
	public String getProcessorName() {
	return RefactoringCoreMessages.RenameTempRefactoring_rename;
	}

	/*
	* @see org.eclipse.ltk.core.refactoring.participants.RefactoringProcessor#isApplicable()
	*/
	public boolean isApplicable() throws CoreException {
	return RefactoringAvailabilityTester.isRenameAvailable(fLocalVariable);
	}

	/*
	* @see org.eclipse.jdt.internal.corext.refactoring.tagging.IReferenceUpdating#canEnableUpdateReferences()
	*/
	public boolean canEnableUpdateReferences() {
	return true;
	}

	/*
	* @see org.eclipse.jdt.internal.corext.refactoring.rename.JavaRenameProcessor#getUpdateReferences()
	*/
	public boolean getUpdateReferences() {
	return fUpdateReferences;
	}

	/*
	* @see org.eclipse.jdt.internal.corext.refactoring.tagging.IReferenceUpdating#setUpdateReferences(boolean)
	*/
	public void setUpdateReferences(boolean updateReferences) {
	fUpdateReferences= updateReferences;
	}

	/*
	* @see org.eclipse.jdt.internal.corext.refactoring.tagging.INameUpdating#getCurrentElementName()
	*/
	public String getCurrentElementName() {
	return fCurrentName;
	}

	/*
	* @see org.eclipse.jdt.internal.corext.refactoring.tagging.INameUpdating#getNewElementName()
	*/
	public String getNewElementName() {
	return fNewName;
	}

	/*
	* @see org.eclipse.jdt.internal.corext.refactoring.tagging.INameUpdating#setNewElementName(java.lang.String)
	*/
	public void setNewElementName(String newName) {
	Assert.isNotNull(newName);
	fNewName= newName;
	}

	/*
	* @see org.eclipse.jdt.internal.corext.refactoring.tagging.INameUpdating#getNewElement()
	*/
	public Object getNewElement() {
	return null; //cannot create an ILocalVariable
	}

	public RefactoringStatus checkInitialConditions(IProgressMonitor pm) throws CoreException {
	initAST();
	if (fTempDeclarationNode == null \|\| fTempDeclarationNode.resolveBinding() == null)
	return RefactoringStatus.createFatalErrorStatus(RefactoringCoreMessages.RenameTempRefactoring_must_select_local);
	if (! Checks.isDeclaredIn(fTempDeclarationNode, MethodDeclaration.class)
	&& ! Checks.isDeclaredIn(fTempDeclarationNode, Initializer.class))
	return RefactoringStatus.createFatalErrorStatus(RefactoringCoreMessages.RenameTempRefactoring_only_in_methods_and_initializers);

	initNames();
	return new RefactoringStatus();
	}

	private void initAST() throws JavaModelException {
	if (!fIsComposite)
	fCompilationUnitNode= RefactoringASTParser.parseWithASTProvider(fCu, true, null);
	ISourceRange sourceRange= fLocalVariable.getNameRange();
	ASTNode name= NodeFinder.perform(fCompilationUnitNode, sourceRange);
	if (name == null)
	return;
	if (name.getParent() instanceof VariableDeclaration)
	fTempDeclarationNode= (VariableDeclaration) name.getParent();
	}

	private void initNames(){
	fCurrentName= fTempDeclarationNode.getName().getIdentifier();
	}

	protected RenameModifications computeRenameModifications() throws CoreException {
	RenameModifications result= new RenameModifications();
	result.rename(fLocalVariable, new RenameArguments(getNewElementName(), getUpdateReferences()));
	return result;
	}

	protected IFile[] getChangedFiles() throws CoreException {
	return new IFile[] {ResourceUtil.getFile(fCu)};
	}

	protected RefactoringStatus doCheckFinalConditions(IProgressMonitor pm, CheckConditionsContext context)
	throws CoreException, OperationCanceledException {
	try {
	pm.beginTask("", 1); //$NON-NLS-1$

	RefactoringStatus result= checkNewElementName(fNewName);
	if (result.hasFatalError())
	return result;
	createEdits();
	if (!fIsComposite) {
	LocalAnalyzePackage[] localAnalyzePackages= new RenameAnalyzeUtil.LocalAnalyzePackage[] { fLocalAnalyzePackage };
	result.merge(RenameAnalyzeUtil.analyzeLocalRenames(localAnalyzePackages, fChange, fCompilationUnitNode, true));
	}
	return result;
	} finally {
	pm.done();
	if (fIsComposite) {
	// end of life cycle for this processor
	fChange= null;
	fCompilationUnitNode= null;
	fTempDeclarationNode= null;
	}
	}
	}

	/*
	* @see org.eclipse.jdt.internal.corext.refactoring.tagging.INameUpdating#checkNewElementName(java.lang.String)
	*/
	public RefactoringStatus checkNewElementName(String newName) throws JavaModelException {
	RefactoringStatus result= Checks.checkFieldName(newName);
	if (! Checks.startsWithLowerCase(newName))
	if (fIsComposite) {
	final String nameOfParent= (fLocalVariable.getParent() instanceof IMethod) ? fLocalVariable.getParent().getElementName() : RefactoringCoreMessages.JavaElementUtil_initializer;
	final String nameOfType= fLocalVariable.getAncestor(IJavaElement.TYPE).getElementName();
	result.addWarning(Messages.format(RefactoringCoreMessages.RenameTempRefactoring_lowercase2, new String[] { newName, nameOfParent, nameOfType }));
	} else {
	result.addWarning(RefactoringCoreMessages.RenameTempRefactoring_lowercase);
	}
	return result;
	}

	private void createEdits() {
	TextEdit declarationEdit= createRenameEdit(fTempDeclarationNode.getName().getStartPosition());
	TextEdit[] allRenameEdits= getAllRenameEdits(declarationEdit);

	TextEdit[] allUnparentedRenameEdits= new TextEdit[allRenameEdits.length];
	TextEdit unparentedDeclarationEdit= null;

	fChange= new CompilationUnitChange(RefactoringCoreMessages.RenameTempRefactoring_rename, fCu);
	MultiTextEdit rootEdit= new MultiTextEdit();
	fChange.setEdit(rootEdit);
	fChange.setKeepPreviewEdits(true);

	for (int i= 0; i < allRenameEdits.length; i++) {
	if (fIsComposite) {
	// Add a copy of the text edit (text edit may only have one
	// parent) to keep problem reporting code clean
	TextChangeCompatibility.addTextEdit(fChangeManager.get(fCu), RefactoringCoreMessages.RenameTempRefactoring_changeName, allRenameEdits[i].copy(), fCategorySet);

	// Add a separate copy for problem reporting
	allUnparentedRenameEdits[i]= allRenameEdits[i].copy();
	if (allRenameEdits[i].equals(declarationEdit))
	unparentedDeclarationEdit= allUnparentedRenameEdits[i];
	}
	rootEdit.addChild(allRenameEdits[i]);
	fChange.addTextEditGroup(new TextEditGroup(RefactoringCoreMessages.RenameTempRefactoring_changeName, allRenameEdits[i]));
	}

	// store information for analysis
	if (fIsComposite) {
	fLocalAnalyzePackage= new RenameAnalyzeUtil.LocalAnalyzePackage(unparentedDeclarationEdit, allUnparentedRenameEdits);
	} else
	fLocalAnalyzePackage= new RenameAnalyzeUtil.LocalAnalyzePackage(declarationEdit, allRenameEdits);
	}

	private TextEdit[] getAllRenameEdits(TextEdit declarationEdit) {
	if (! fUpdateReferences)
	return new TextEdit[] { declarationEdit };

	TempOccurrenceAnalyzer fTempAnalyzer= new TempOccurrenceAnalyzer(fTempDeclarationNode, true);
	fTempAnalyzer.perform();
	int[] referenceOffsets= fTempAnalyzer.getReferenceAndJavadocOffsets();

	TextEdit[] allRenameEdits= new TextEdit[referenceOffsets.length + 1];
	for (int i= 0; i < referenceOffsets.length; i++)
	allRenameEdits[i]= createRenameEdit(referenceOffsets[i]);
	allRenameEdits[referenceOffsets.length]= declarationEdit;
	return allRenameEdits;
	}

	private TextEdit createRenameEdit(int offset) {
	return new ReplaceEdit(offset, fCurrentName.length(), fNewName);
	}

	public Change createChange(IProgressMonitor monitor) throws CoreException {
	try {
	Change change= fChange;
	if (change != null) {
	final ISourceRange range= fLocalVariable.getNameRange();
	final Map arguments= new HashMap();
	String project= null;
	IJavaProject javaProject= fCu.getJavaProject();
	if (javaProject != null)
	project= javaProject.getElementName();
	final String header= Messages.format(RefactoringCoreMessages.RenameLocalVariableProcessor_descriptor_description, new String[] { fCurrentName, JavaElementLabels.getElementLabel(fLocalVariable.getParent(), JavaElementLabels.ALL_FULLY_QUALIFIED), fNewName});
	final String description= Messages.format(RefactoringCoreMessages.RenameLocalVariableProcessor_descriptor_description_short, fCurrentName);
	final String comment= new JavaRefactoringDescriptorComment(this, header).asString();
	final JavaRefactoringDescriptor descriptor= new JavaRefactoringDescriptor(ID_RENAME_LOCAL_VARIABLE, project, description, comment, arguments, RefactoringDescriptor.NONE);
	arguments.put(JavaRefactoringDescriptor.ATTRIBUTE_INPUT, descriptor.elementToHandle(fCu));
	arguments.put(JavaRefactoringDescriptor.ATTRIBUTE_NAME, getNewElementName());
	arguments.put(JavaRefactoringDescriptor.ATTRIBUTE_SELECTION, new Integer(range.getOffset()).toString() + " " + new Integer(range.getLength()).toString()); //$NON-NLS-1$
	arguments.put(ATTRIBUTE_REFERENCES, Boolean.valueOf(fUpdateReferences).toString());
	final RefactoringDescriptorChange result= new RefactoringDescriptorChange(descriptor, RefactoringCoreMessages.RenameTempRefactoring_rename, new Change[] { change});
	result.markAsSynthetic();
	change= result;
	}
	return change;
	} finally {
	monitor.done();
	}
	}

	public RefactoringStatus initialize(RefactoringArguments arguments) {
	if (arguments instanceof JavaRefactoringArguments) {
	final JavaRefactoringArguments extended= (JavaRefactoringArguments) arguments;
	final String handle= extended.getAttribute(JavaRefactoringDescriptor.ATTRIBUTE_INPUT);
	if (handle != null) {
	final IJavaElement element= JavaRefactoringDescriptor.handleToElement(extended.getProject(), handle, false);
	if (element == null \|\| !element.exists() \|\| element.getElementType() != IJavaElement.COMPILATION_UNIT)
	return ScriptableRefactoring.createInputFatalStatus(element, getRefactoring().getName(), ID_RENAME_LOCAL_VARIABLE);
	else
	fCu= (ICompilationUnit) element;
	} else
	return RefactoringStatus.createFatalErrorStatus(Messages.format(RefactoringCoreMessages.InitializableRefactoring_argument_not_exist, JavaRefactoringDescriptor.ATTRIBUTE_INPUT));
	final String name= extended.getAttribute(JavaRefactoringDescriptor.ATTRIBUTE_NAME);
	if (name != null && !"".equals(name)) //$NON-NLS-1$
	setNewElementName(name);
	else
	return RefactoringStatus.createFatalErrorStatus(Messages.format(RefactoringCoreMessages.InitializableRefactoring_argument_not_exist, JavaRefactoringDescriptor.ATTRIBUTE_NAME));
	if (fCu != null) {
	final String selection= extended.getAttribute(JavaRefactoringDescriptor.ATTRIBUTE_SELECTION);
	if (selection != null) {
	int offset= -1;
	int length= -1;
	final StringTokenizer tokenizer= new StringTokenizer(selection);
	if (tokenizer.hasMoreTokens())
	offset= Integer.valueOf(tokenizer.nextToken()).intValue();
	if (tokenizer.hasMoreTokens())
	length= Integer.valueOf(tokenizer.nextToken()).intValue();
	if (offset >= 0 && length >= 0) {
	try {
	final IJavaElement[] elements= fCu.codeSelect(offset, length);
	if (elements != null) {
	for (int index= 0; index < elements.length; index++) {
	final IJavaElement element= elements[index];
	if (element instanceof ILocalVariable)
	fLocalVariable= (ILocalVariable) element;
	}
	}
	if (fLocalVariable == null)
	return ScriptableRefactoring.createInputFatalStatus(null, getRefactoring().getName(), ID_RENAME_LOCAL_VARIABLE);
	} catch (JavaModelException exception) {
	JavaPlugin.log(exception);
	}
	} else
	return RefactoringStatus.createFatalErrorStatus(Messages.format(RefactoringCoreMessages.InitializableRefactoring_illegal_argument, new Object[] { selection, JavaRefactoringDescriptor.ATTRIBUTE_SELECTION}));
	} else
	return RefactoringStatus.createFatalErrorStatus(Messages.format(RefactoringCoreMessages.InitializableRefactoring_argument_not_exist, JavaRefactoringDescriptor.ATTRIBUTE_SELECTION));
	}
	final String references= extended.getAttribute(ATTRIBUTE_REFERENCES);
	if (references != null) {
	fUpdateReferences= Boolean.valueOf(references).booleanValue();
	} else
	return RefactoringStatus.createFatalErrorStatus(Messages.format(RefactoringCoreMessages.InitializableRefactoring_argument_not_exist, ATTRIBUTE_REFERENCES));
	} else
	return RefactoringStatus.createFatalErrorStatus(RefactoringCoreMessages.InitializableRefactoring_inacceptable_arguments);
	return new RefactoringStatus();
	}

	public RenameAnalyzeUtil.LocalAnalyzePackage getLocalAnalyzePackage() {
	return fLocalAnalyzePackage;
	}
	}