/*******************************************************************************
* Copyright (c) 2000, 2013 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.StringTokenizer;
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.text.edits.MultiTextEdit;
import org.eclipse.text.edits.ReplaceEdit;
import org.eclipse.text.edits.TextEdit;
import org.eclipse.text.edits.TextEditGroup;
import org.eclipse.ltk.core.refactoring.Change;
import org.eclipse.ltk.core.refactoring.GroupCategorySet;
import org.eclipse.ltk.core.refactoring.RefactoringChangeDescriptor;
import org.eclipse.ltk.core.refactoring.RefactoringDescriptor;
import org.eclipse.ltk.core.refactoring.RefactoringStatus;
import org.eclipse.ltk.core.refactoring.participants.CheckConditionsContext;
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.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.LambdaExpression;
import org.eclipse.jdt.core.dom.MethodDeclaration;
import org.eclipse.jdt.core.dom.NodeFinder;
import org.eclipse.jdt.core.dom.VariableDeclaration;
import org.eclipse.jdt.core.refactoring.CompilationUnitChange;
import org.eclipse.jdt.core.refactoring.IJavaRefactorings;
import org.eclipse.jdt.core.refactoring.descriptors.RenameJavaElementDescriptor;
import org.eclipse.jdt.internal.core.refactoring.descriptors.RefactoringSignatureDescriptorFactory;
import org.eclipse.jdt.internal.corext.refactoring.Checks;
import org.eclipse.jdt.internal.corext.refactoring.JDTRefactoringDescriptorComment;
import org.eclipse.jdt.internal.corext.refactoring.JavaRefactoringArguments;
import org.eclipse.jdt.internal.corext.refactoring.JavaRefactoringDescriptorUtil;
import org.eclipse.jdt.internal.corext.refactoring.RefactoringAvailabilityTester;
import org.eclipse.jdt.internal.corext.refactoring.RefactoringCoreMessages;
import org.eclipse.jdt.internal.corext.refactoring.changes.TextChangeCompatibility;
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.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.JavaModelUtil;
import org.eclipse.jdt.internal.corext.util.Messages;
import org.eclipse.jdt.ui.JavaElementLabels;
import org.eclipse.jdt.ui.refactoring.RefactoringSaveHelper;
import org.eclipse.jdt.internal.ui.JavaPlugin;
import org.eclipse.jdt.internal.ui.viewsupport.BasicElementLabels;
public class RenameLocalVariableProcessor extends JavaRenameProcessor implements IReferenceUpdating {
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 CompilationUnitChange 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;
}
public RenameLocalVariableProcessor(JavaRefactoringArguments arguments, RefactoringStatus status) {
this(null);
RefactoringStatus initializeStatus= initialize(arguments);
status.merge(initializeStatus);
}
/**
* 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#getAffectedProjectNatures()
*/
@Override
protected final String[] getAffectedProjectNatures() throws CoreException {
return JavaProcessors.computeAffectedNatures(fLocalVariable);
}
/*
* @see org.eclipse.ltk.core.refactoring.participants.RefactoringProcessor#getElements()
*/
@Override
public Object[] getElements() {
return new Object[] { fLocalVariable };
}
/*
* @see org.eclipse.ltk.core.refactoring.participants.RefactoringProcessor#getIdentifier()
*/
@Override
public String getIdentifier() {
return IDENTIFIER;
}
/*
* @see org.eclipse.ltk.core.refactoring.participants.RefactoringProcessor#getProcessorName()
*/
@Override
public String getProcessorName() {
return RefactoringCoreMessages.RenameTempRefactoring_rename;
}
/*
* @see org.eclipse.ltk.core.refactoring.participants.RefactoringProcessor#isApplicable()
*/
@Override
public boolean isApplicable() throws CoreException {
return RefactoringAvailabilityTester.isRenameAvailable(fLocalVariable);
}
/*
* @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()
*/
@Override
public String getNewElementName() {
return fNewName;
}
/*
* @see org.eclipse.jdt.internal.corext.refactoring.tagging.INameUpdating#setNewElementName(java.lang.String)
*/
@Override
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
}
@Override
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)
&& !Checks.isDeclaredIn(fTempDeclarationNode, LambdaExpression.class)) {
if (JavaModelUtil.is18OrHigher(fCu.getJavaProject()))
return RefactoringStatus.createFatalErrorStatus(RefactoringCoreMessages.RenameTempRefactoring_only_in_methods_initializers_and_lambda);
return RefactoringStatus.createFatalErrorStatus(RefactoringCoreMessages.RenameTempRefactoring_only_in_methods_and_initializers);
}
initNames();
return new RefactoringStatus();
}
private void initAST() {
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();
}
@Override
protected RenameModifications computeRenameModifications() throws CoreException {
RenameModifications result= new RenameModifications();
result.rename(fLocalVariable, new RenameArguments(getNewElementName(), getUpdateReferences()));
return result;
}
@Override
protected IFile[] getChangedFiles() throws CoreException {
return new IFile[] {ResourceUtil.getFile(fCu)};
}
@Override
public int getSaveMode() {
return RefactoringSaveHelper.SAVE_NOTHING;
}
@Override
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, fCu);
if (! Checks.startsWithLowerCase(newName))
if (fIsComposite) {
final String nameOfParent= JavaElementLabels.getElementLabel(fLocalVariable.getParent(), JavaElementLabels.ALL_DEFAULT);
final String nameOfType= JavaElementLabels.getElementLabel(fLocalVariable.getAncestor(IJavaElement.TYPE), JavaElementLabels.ALL_DEFAULT);
result.addWarning(Messages.format(RefactoringCoreMessages.RenameTempRefactoring_lowercase2, new String[] { BasicElementLabels.getJavaElementName(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);
}
@Override
public Change createChange(IProgressMonitor monitor) throws CoreException {
try {
monitor.beginTask(RefactoringCoreMessages.RenameTypeProcessor_creating_changes, 1);
RenameJavaElementDescriptor descriptor= createRefactoringDescriptor();
fChange.setDescriptor(new RefactoringChangeDescriptor(descriptor));
return fChange;
} finally {
monitor.done();
}
}
private RenameJavaElementDescriptor createRefactoringDescriptor() {
String project= null;
IJavaProject javaProject= fCu.getJavaProject();
if (javaProject != null)
project= javaProject.getElementName();
final String header= Messages.format(RefactoringCoreMessages.RenameLocalVariableProcessor_descriptor_description, new String[] { BasicElementLabels.getJavaElementName(fCurrentName), JavaElementLabels.getElementLabel(fLocalVariable.getParent(), JavaElementLabels.ALL_FULLY_QUALIFIED), BasicElementLabels.getJavaElementName(fNewName)});
final String description= Messages.format(RefactoringCoreMessages.RenameLocalVariableProcessor_descriptor_description_short, BasicElementLabels.getJavaElementName(fCurrentName));
final String comment= new JDTRefactoringDescriptorComment(project, this, header).asString();
final RenameJavaElementDescriptor descriptor= RefactoringSignatureDescriptorFactory.createRenameJavaElementDescriptor(IJavaRefactorings.RENAME_LOCAL_VARIABLE);
descriptor.setProject(project);
descriptor.setDescription(description);
descriptor.setComment(comment);
descriptor.setFlags(RefactoringDescriptor.NONE);
descriptor.setJavaElement(fLocalVariable);
descriptor.setNewName(getNewElementName());
descriptor.setUpdateReferences(fUpdateReferences);
return descriptor;
}
private RefactoringStatus initialize(JavaRefactoringArguments extended) {
final String handle= extended.getAttribute(JavaRefactoringDescriptorUtil.ATTRIBUTE_INPUT);
if (handle != null) {
final IJavaElement element= JavaRefactoringDescriptorUtil.handleToElement(extended.getProject(), handle, false);
if (element != null && element.exists()) {
if (element.getElementType() == IJavaElement.COMPILATION_UNIT) {
fCu= (ICompilationUnit) element;
} else if (element.getElementType() == IJavaElement.LOCAL_VARIABLE) {
fLocalVariable= (ILocalVariable) element;
fCu= (ICompilationUnit) fLocalVariable.getAncestor(IJavaElement.COMPILATION_UNIT);
if (fCu == null)
return JavaRefactoringDescriptorUtil.createInputFatalStatus(element, getProcessorName(), IJavaRefactorings.RENAME_LOCAL_VARIABLE);
} else
return JavaRefactoringDescriptorUtil.createInputFatalStatus(element, getProcessorName(), IJavaRefactorings.RENAME_LOCAL_VARIABLE);
} else
return JavaRefactoringDescriptorUtil.createInputFatalStatus(element, getProcessorName(), IJavaRefactorings.RENAME_LOCAL_VARIABLE);
} else
return RefactoringStatus.createFatalErrorStatus(Messages.format(RefactoringCoreMessages.InitializableRefactoring_argument_not_exist, JavaRefactoringDescriptorUtil.ATTRIBUTE_INPUT));
final String name= extended.getAttribute(JavaRefactoringDescriptorUtil.ATTRIBUTE_NAME);
if (name != null && !"".equals(name)) //$NON-NLS-1$
setNewElementName(name);
else
return RefactoringStatus.createFatalErrorStatus(Messages.format(RefactoringCoreMessages.InitializableRefactoring_argument_not_exist, JavaRefactoringDescriptorUtil.ATTRIBUTE_NAME));
if (fCu != null && fLocalVariable == null) {
final String selection= extended.getAttribute(JavaRefactoringDescriptorUtil.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 JavaRefactoringDescriptorUtil.createInputFatalStatus(null, getProcessorName(), IJavaRefactorings.RENAME_LOCAL_VARIABLE);
} catch (JavaModelException exception) {
JavaPlugin.log(exception);
}
} else
return RefactoringStatus.createFatalErrorStatus(Messages.format(RefactoringCoreMessages.InitializableRefactoring_illegal_argument, new Object[] { selection,
JavaRefactoringDescriptorUtil.ATTRIBUTE_SELECTION }));
} else
return RefactoringStatus
.createFatalErrorStatus(Messages.format(RefactoringCoreMessages.InitializableRefactoring_argument_not_exist, JavaRefactoringDescriptorUtil.ATTRIBUTE_SELECTION));
}
final String references= extended.getAttribute(JavaRefactoringDescriptorUtil.ATTRIBUTE_REFERENCES);
if (references != null) {
fUpdateReferences= Boolean.valueOf(references).booleanValue();
} else
return RefactoringStatus.createFatalErrorStatus(Messages.format(RefactoringCoreMessages.InitializableRefactoring_argument_not_exist, JavaRefactoringDescriptorUtil.ATTRIBUTE_REFERENCES));
return new RefactoringStatus();
}
public RenameAnalyzeUtil.LocalAnalyzePackage getLocalAnalyzePackage() {
return fLocalAnalyzePackage;
}
}
