| /* |
| * Copyright 2000-2009 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.intellij.refactoring.util.occurrences; |
| |
| import com.intellij.psi.PsiClass; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiExpression; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.intellij.refactoring.introduceField.ElementToWorkOn; |
| import com.intellij.refactoring.util.RefactoringUtil; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * @author dsl |
| */ |
| public abstract class BaseOccurrenceManager implements OccurrenceManager { |
| private PsiExpression[] myOccurrences = null; |
| private PsiElement myAnchorStatement = null; |
| protected final OccurrenceFilter myFilter; |
| |
| public BaseOccurrenceManager(OccurrenceFilter filter) { |
| myFilter = filter; |
| } |
| |
| public PsiExpression[] getOccurrences() { |
| if(myOccurrences == null) { |
| myOccurrences = findOccurrences(); |
| |
| if(myFilter != null) { |
| ArrayList<PsiExpression> result = new ArrayList<PsiExpression>(); |
| for (PsiExpression occurrence : myOccurrences) { |
| if (myFilter.isOK(occurrence)) result.add(occurrence); |
| } |
| if (result.isEmpty()) { |
| myOccurrences = defaultOccurrences(); |
| } |
| else { |
| myOccurrences = result.toArray(new PsiExpression[result.size()]); |
| } |
| } |
| |
| if (getAnchorStatementForAll() == null) { |
| myOccurrences = defaultOccurrences(); |
| } |
| } |
| return myOccurrences; |
| } |
| |
| protected abstract PsiExpression[] defaultOccurrences(); |
| |
| protected abstract PsiExpression[] findOccurrences(); |
| |
| public boolean isInFinalContext() { |
| return needToDeclareFinal(myOccurrences); |
| } |
| |
| public PsiElement getAnchorStatementForAll() { |
| if(myAnchorStatement == null) { |
| myAnchorStatement = getAnchorStatementForAllInScope(null); |
| } |
| return myAnchorStatement; |
| |
| } |
| public PsiElement getAnchorStatementForAllInScope(PsiElement scope) { |
| return RefactoringUtil.getAnchorElementForMultipleExpressions(myOccurrences, scope); |
| } |
| |
| private static boolean needToDeclareFinal(PsiExpression[] occurrences) { |
| PsiElement scopeToDeclare = null; |
| for (PsiExpression occurrence : occurrences) { |
| final PsiElement data = occurrence.getUserData(ElementToWorkOn.PARENT); |
| if (scopeToDeclare == null) { |
| scopeToDeclare = data != null ? data : occurrence; |
| } |
| else { |
| scopeToDeclare = PsiTreeUtil.findCommonParent(scopeToDeclare, data != null ? data : occurrence); |
| } |
| } |
| if(scopeToDeclare == null) { |
| return false; |
| } |
| |
| for (PsiExpression occurrence : occurrences) { |
| PsiElement parent = occurrence.getUserData(ElementToWorkOn.PARENT); |
| if (parent == null) parent = occurrence; |
| while (!parent.equals(scopeToDeclare)) { |
| parent = parent.getParent(); |
| if (parent instanceof PsiClass) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| } |