| /* |
| * 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. |
| */ |
| |
| /* |
| * Created by IntelliJ IDEA. |
| * User: dsl |
| * Date: 06.05.2002 |
| * Time: 14:38:40 |
| * To change template for new class use |
| * Code Style | Class Templates options (Tools | IDE Options). |
| */ |
| package com.intellij.refactoring.introduceParameter; |
| |
| import com.intellij.psi.*; |
| import com.intellij.psi.search.searches.OverridingMethodsSearch; |
| import com.intellij.psi.search.searches.ReferencesSearch; |
| import com.intellij.psi.util.PropertyUtil; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.intellij.psi.util.PsiUtil; |
| import com.intellij.refactoring.introduceField.ElementToWorkOn; |
| import com.intellij.usageView.UsageInfo; |
| import com.intellij.util.ArrayUtil; |
| import com.intellij.util.Processor; |
| import gnu.trove.TIntArrayList; |
| import gnu.trove.TIntHashSet; |
| import gnu.trove.TIntIterator; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.List; |
| |
| public class Util { |
| |
| public static void analyzeExpression(PsiExpression expr, |
| List<UsageInfo> localVars, |
| List<UsageInfo> classMemberRefs, |
| List<UsageInfo> params) { |
| |
| if (expr instanceof PsiThisExpression || expr instanceof PsiSuperExpression) { |
| classMemberRefs.add(new ClassMemberInExprUsageInfo(expr)); |
| } |
| else if (expr instanceof PsiReferenceExpression) { |
| final PsiReferenceExpression refExpr = (PsiReferenceExpression)expr; |
| |
| PsiElement subj = refExpr.resolve(); |
| |
| if (subj instanceof PsiParameter) { |
| params.add(new ParameterInExprUsageInfo(refExpr)); |
| } |
| else if (subj instanceof PsiLocalVariable) { |
| localVars.add(new LocalVariableInExprUsageInfo(refExpr)); |
| } |
| else if (subj instanceof PsiField || subj instanceof PsiMethod) { |
| classMemberRefs.add(new ClassMemberInExprUsageInfo(refExpr)); |
| } |
| |
| } |
| |
| PsiElement[] children = expr.getChildren(); |
| |
| for (PsiElement child : children) { |
| if (child instanceof PsiExpression) { |
| analyzeExpression((PsiExpression)child, localVars, classMemberRefs, params); |
| } |
| } |
| } |
| |
| @NotNull |
| private static PsiElement getPhysical(@NotNull PsiElement expr) { |
| PsiElement physicalElement = expr.getUserData(ElementToWorkOn.PARENT); |
| if (physicalElement != null) expr = physicalElement; |
| return expr; |
| } |
| |
| public static PsiMethod getContainingMethod(PsiElement expr) { |
| return PsiTreeUtil.getParentOfType(getPhysical(expr), PsiMethod.class); |
| } |
| public static boolean isAncestor(PsiElement ancestor, PsiElement element, boolean strict) { |
| return PsiTreeUtil.isAncestor(getPhysical(ancestor), getPhysical(element), strict); |
| } |
| |
| public static boolean anyFieldsWithGettersPresent(List<UsageInfo> classMemberRefs) { |
| for (UsageInfo usageInfo : classMemberRefs) { |
| |
| if (usageInfo.getElement() instanceof PsiReferenceExpression) { |
| PsiElement e = ((PsiReferenceExpression)usageInfo.getElement()).resolve(); |
| |
| if (e instanceof PsiField) { |
| PsiField psiField = (PsiField)e; |
| PsiMethod getterPrototype = PropertyUtil.generateGetterPrototype(psiField); |
| |
| PsiMethod getter = psiField.getContainingClass().findMethodBySignature(getterPrototype, true); |
| |
| if (getter != null) return true; |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| // returns parameters that are used solely in specified expression |
| @NotNull |
| public static TIntArrayList findParametersToRemove(@NotNull PsiMethod method, |
| @NotNull final PsiExpression expr, |
| @Nullable final PsiExpression[] occurences) { |
| final PsiParameter[] parameters = method.getParameterList().getParameters(); |
| if (parameters.length == 0) return new TIntArrayList(); |
| |
| PsiMethod[] overridingMethods = OverridingMethodsSearch.search(method, true).toArray(PsiMethod.EMPTY_ARRAY); |
| final PsiMethod[] allMethods = ArrayUtil.append(overridingMethods, method); |
| |
| final TIntHashSet suspects = new TIntHashSet(); |
| expr.accept(new JavaRecursiveElementWalkingVisitor() { |
| @Override public void visitReferenceExpression(final PsiReferenceExpression expression) { |
| super.visitReferenceExpression(expression); |
| PsiElement resolved = expression.resolve(); |
| if (resolved instanceof PsiParameter) { |
| int i = ArrayUtil.find(parameters, resolved); |
| if (i != -1) { |
| suspects.add(i); |
| } |
| } |
| } |
| }); |
| |
| final TIntIterator iterator = suspects.iterator(); |
| while(iterator.hasNext()) { |
| final int paramNum = iterator.next(); |
| for (PsiMethod psiMethod : allMethods) { |
| PsiParameter[] psiParameters = psiMethod.getParameterList().getParameters(); |
| if (paramNum >= psiParameters.length) continue; |
| PsiParameter parameter = psiParameters[paramNum]; |
| if (!ReferencesSearch.search(parameter, parameter.getResolveScope(), false).forEach(new Processor<PsiReference>() { |
| public boolean process(final PsiReference reference) { |
| PsiElement element = reference.getElement(); |
| boolean stillCanBeRemoved = false; |
| if (element != null) { |
| stillCanBeRemoved = isAncestor(expr, element, false) || PsiUtil.isInsideJavadocComment(getPhysical(element)); |
| if (!stillCanBeRemoved && occurences != null) { |
| for (PsiExpression occurence : occurences) { |
| if (isAncestor(occurence, element, false)) { |
| stillCanBeRemoved = true; |
| break; |
| } |
| } |
| } |
| } |
| if (!stillCanBeRemoved) { |
| iterator.remove(); |
| return false; |
| } |
| return true; |
| } |
| })) break; |
| } |
| } |
| |
| return new TIntArrayList(suspects.toArray()); |
| } |
| } |