| /******************************************************************************* |
| * Copyright (c) 2000, 2011 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.Collections; |
| import java.util.LinkedList; |
| import java.util.Map; |
| |
| import org.eclipse.core.runtime.Assert; |
| |
| import org.eclipse.jdt.core.IField; |
| import org.eclipse.jdt.core.IInitializer; |
| import org.eclipse.jdt.core.IJavaElement; |
| import org.eclipse.jdt.core.IMember; |
| import org.eclipse.jdt.core.IMethod; |
| import org.eclipse.jdt.core.IType; |
| import org.eclipse.jdt.core.Signature; |
| |
| |
| /** |
| * Helper class to transplant a IJavaElement handle from a certain state of the |
| * Java Model into another. |
| * |
| * The changes to the workspace include one type rename, a number of field |
| * renames, and a number of method renames including signature changes. |
| * |
| * The returned handle exists in the target model state. |
| * |
| * @since 3.2 |
| * |
| */ |
| public class RefactoringHandleTransplanter { |
| |
| private final IType fOldType; |
| private final IType fNewType; |
| private final Map<IJavaElement, String> fRefactoredSimilarElements; |
| |
| /** |
| * @param oldType old type |
| * @param newType renamed type |
| * @param refactoredSimilarElements map from similar element (IJavaElement) to new name (String), or <code>null</code> |
| */ |
| public RefactoringHandleTransplanter(IType oldType, IType newType, Map<IJavaElement, String> refactoredSimilarElements) { |
| fOldType= oldType; |
| fNewType= newType; |
| if (refactoredSimilarElements == null) |
| fRefactoredSimilarElements= Collections.emptyMap(); |
| else |
| fRefactoredSimilarElements= refactoredSimilarElements; |
| } |
| |
| /** |
| * Converts the handle. Handle need not exist, but must be a source |
| * reference. |
| * |
| * @param handle |
| * @return the new handle |
| */ |
| public IMember transplantHandle(IMember handle) { |
| |
| /* |
| * Create a list of handles from top-level type to the handle |
| */ |
| final LinkedList<IMember> oldElements= new LinkedList<IMember>(); |
| addElements(handle, oldElements); |
| |
| /* |
| * Step through the elements and re-locate them in the new parents. |
| */ |
| final IMember[] newElements= convertElements(oldElements.toArray(new IMember[0])); |
| |
| return newElements[newElements.length - 1]; |
| } |
| |
| private void addElements(IMember element, LinkedList<IMember> chain) { |
| chain.addFirst(element); |
| IJavaElement parent= element.getParent(); |
| if (parent instanceof IMember) |
| addElements((IMember) parent, chain); |
| } |
| |
| private IMember[] convertElements(IMember[] oldElements) { |
| |
| final IMember[] newElements= new IMember[oldElements.length]; |
| final IMember first= oldElements[0]; |
| |
| Assert.isTrue(first instanceof IType); |
| |
| if (first.equals(fOldType)) |
| // We renamed a top level type. |
| newElements[0]= fNewType; |
| else |
| newElements[0]= first; |
| |
| /* |
| * Note that we only need to translate the information necessary to |
| * create new handles. For example, the return type of a method is not |
| * relevant; neither is information about generic specifics in types. |
| */ |
| |
| for (int i= 1; i < oldElements.length; i++) { |
| final IJavaElement newParent= newElements[i - 1]; |
| final IJavaElement currentElement= oldElements[i]; |
| switch (newParent.getElementType()) { |
| case IJavaElement.TYPE: { |
| switch (currentElement.getElementType()) { |
| case IJavaElement.TYPE: { |
| final String newName= resolveTypeName((IType) currentElement); |
| newElements[i]= ((IType) newParent).getType(newName); |
| break; |
| } |
| case IJavaElement.METHOD: { |
| final String newName= resolveElementName(currentElement); |
| final String[] newParameterTypes= resolveParameterTypes((IMethod) currentElement); |
| newElements[i]= ((IType) newParent).getMethod(newName, newParameterTypes); |
| break; |
| } |
| case IJavaElement.INITIALIZER: { |
| final IInitializer initializer= (IInitializer) currentElement; |
| newElements[i]= ((IType) newParent).getInitializer(initializer.getOccurrenceCount()); |
| break; |
| } |
| case IJavaElement.FIELD: { |
| final String newName= resolveElementName(currentElement); |
| newElements[i]= ((IType) newParent).getField(newName); |
| break; |
| } |
| } |
| break; |
| } |
| case IJavaElement.METHOD: { |
| switch (currentElement.getElementType()) { |
| case IJavaElement.TYPE: { |
| newElements[i]= resolveTypeInMember((IMethod) newParent, (IType) currentElement); |
| break; |
| } |
| } |
| break; |
| } |
| case IJavaElement.INITIALIZER: { |
| switch (currentElement.getElementType()) { |
| case IJavaElement.TYPE: { |
| newElements[i]= resolveTypeInMember((IInitializer) newParent, (IType) currentElement); |
| break; |
| } |
| } |
| break; |
| } |
| case IJavaElement.FIELD: { |
| switch (currentElement.getElementType()) { |
| case IJavaElement.TYPE: { |
| // anonymous type in field declaration |
| newElements[i]= resolveTypeInMember((IField) newParent, (IType) currentElement); |
| break; |
| } |
| } |
| break; |
| } |
| } |
| } |
| return newElements; |
| } |
| |
| private String[] resolveParameterTypes(IMethod method) { |
| final String[] oldParameterTypes= method.getParameterTypes(); |
| final String[] newparams= new String[oldParameterTypes.length]; |
| |
| final String[] possibleOldSigs= new String[4]; |
| possibleOldSigs[0]= Signature.createTypeSignature(fOldType.getElementName(), false); |
| possibleOldSigs[1]= Signature.createTypeSignature(fOldType.getElementName(), true); |
| possibleOldSigs[2]= Signature.createTypeSignature(fOldType.getFullyQualifiedName(), false); |
| possibleOldSigs[3]= Signature.createTypeSignature(fOldType.getFullyQualifiedName(), true); |
| |
| final String[] possibleNewSigs= new String[4]; |
| possibleNewSigs[0]= Signature.createTypeSignature(fNewType.getElementName(), false); |
| possibleNewSigs[1]= Signature.createTypeSignature(fNewType.getElementName(), true); |
| possibleNewSigs[2]= Signature.createTypeSignature(fNewType.getFullyQualifiedName(), false); |
| possibleNewSigs[3]= Signature.createTypeSignature(fNewType.getFullyQualifiedName(), true); |
| |
| // Textually replace all occurrences |
| // This handles stuff like Map<SomeClass, some.package.SomeClass> |
| for (int i= 0; i < oldParameterTypes.length; i++) { |
| newparams[i]= oldParameterTypes[i]; |
| for (int j= 0; j < possibleOldSigs.length; j++) { |
| newparams[i]= replaceAll(newparams[i], possibleOldSigs[j], possibleNewSigs[j]); |
| } |
| } |
| return newparams; |
| } |
| |
| private String resolveElementName(IJavaElement element) { |
| final String newName= fRefactoredSimilarElements.get(element); |
| if (newName != null) |
| return newName; |
| else |
| return element.getElementName(); |
| } |
| |
| private IMember resolveTypeInMember(final IMember newParent, IType oldChild) { |
| // Local type or anonymous type. Only local types can be renamed. |
| String newName= ""; //$NON-NLS-1$ |
| if (oldChild.getElementName().length() != 0) |
| newName= resolveTypeName(oldChild); |
| return newParent.getType(newName, oldChild.getOccurrenceCount()); |
| } |
| |
| private String resolveTypeName(IType type) { |
| return type.equals(fOldType) ? fNewType.getElementName() : type.getElementName(); |
| } |
| |
| private static String replaceAll(final String source, final String replaceFrom, final String replaceTo) { |
| final StringBuffer buf= new StringBuffer(source.length()); |
| int currentIndex= 0; |
| int matchIndex; |
| while ((matchIndex= source.indexOf(replaceFrom, currentIndex)) != -1) { |
| buf.append(source.substring(currentIndex, matchIndex)); |
| buf.append(replaceTo); |
| currentIndex= matchIndex + replaceFrom.length(); |
| } |
| buf.append(source.substring(currentIndex)); |
| return buf.toString(); |
| } |
| } |