| /* |
| * Copyright 2000-2014 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.psi.impl.search; |
| |
| import com.intellij.openapi.application.ApplicationManager; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.util.Computable; |
| import com.intellij.psi.*; |
| import com.intellij.psi.impl.java.stubs.index.JavaMethodParameterTypesIndex; |
| import com.intellij.psi.search.EverythingGlobalScope; |
| import com.intellij.psi.search.GlobalSearchScope; |
| import com.intellij.psi.search.SearchScope; |
| import com.intellij.psi.search.searches.FunctionalExpressionSearch; |
| import com.intellij.psi.search.searches.MethodReferencesSearch; |
| import com.intellij.psi.search.searches.ReferencesSearch; |
| import com.intellij.psi.util.PsiUtil; |
| import com.intellij.psi.util.PsiUtilCore; |
| import com.intellij.util.Processor; |
| import com.intellij.util.QueryExecutor; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.Collection; |
| |
| public class JavaFunctionalExpressionSearcher implements QueryExecutor<PsiFunctionalExpression, FunctionalExpressionSearch.SearchParameters> { |
| |
| @Override |
| public boolean execute(@NotNull final FunctionalExpressionSearch.SearchParameters queryParameters, |
| @NotNull final Processor<PsiFunctionalExpression> consumer) { |
| final PsiClass aClass = queryParameters.getElementToSearch(); |
| if (ApplicationManager.getApplication().runReadAction(new Computable<Boolean>() { |
| @Override |
| public Boolean compute() { |
| return !LambdaUtil.isFunctionalClass(aClass) || !PsiUtil.isLanguageLevel8OrHigher(aClass); |
| } |
| })) { |
| return true; |
| } |
| return collectFunctionalExpressions(aClass, ApplicationManager.getApplication().runReadAction(new Computable<SearchScope>() { |
| @Override |
| public SearchScope compute() { |
| return queryParameters.getEffectiveSearchScope(); |
| } |
| }), consumer); |
| } |
| |
| public static boolean collectFunctionalExpressions(final PsiClass aClass, |
| final SearchScope searchScope, |
| final Processor<PsiFunctionalExpression> consumer) { |
| final SearchScope classScope = ApplicationManager.getApplication().runReadAction(new Computable<SearchScope>() { |
| @Override |
| public SearchScope compute() { |
| return aClass.getUseScope(); |
| } |
| }); |
| final SearchScope useScope = ApplicationManager.getApplication().runReadAction(new Computable<SearchScope>() { |
| @Override |
| public SearchScope compute() { |
| return searchScope.intersectWith(classScope); |
| } |
| }); |
| final Project project = PsiUtilCore.getProjectInReadAction(aClass); |
| final GlobalSearchScope scope = useScope instanceof GlobalSearchScope ? (GlobalSearchScope)useScope : new EverythingGlobalScope(project); |
| final Collection<PsiMethod> lambdaCandidates = ApplicationManager.getApplication().runReadAction(new Computable<Collection<PsiMethod>>() { |
| @Override |
| public Collection<PsiMethod> compute() { |
| final String functionalInterfaceName = aClass.getName(); |
| final GlobalSearchScope useClassScope = classScope instanceof GlobalSearchScope ? (GlobalSearchScope)classScope : scope; |
| return JavaMethodParameterTypesIndex.getInstance().get(functionalInterfaceName, project, useClassScope); |
| } |
| }); |
| for (PsiMethod psiMethod : lambdaCandidates) { |
| for (final PsiReference ref : MethodReferencesSearch.search(psiMethod, scope, false)) { |
| boolean accepted = ApplicationManager.getApplication().runReadAction(new Computable<Boolean>() { |
| @Override |
| public Boolean compute() { |
| final PsiElement refElement = ref.getElement(); |
| if (refElement != null) { |
| final PsiElement candidateElement = refElement.getParent(); |
| if (candidateElement instanceof PsiCallExpression) { |
| final PsiExpressionList argumentList = ((PsiCallExpression)candidateElement).getArgumentList(); |
| if (argumentList != null) { |
| final PsiExpression[] args = argumentList.getExpressions(); |
| for (PsiExpression arg : args) { |
| if (arg instanceof PsiFunctionalExpression) { |
| final PsiFunctionalExpression functionalExpression = (PsiFunctionalExpression)arg; |
| final PsiType functionalType = functionalExpression.getFunctionalInterfaceType(); |
| if (PsiUtil.resolveClassInType(functionalType) == aClass) { |
| if (!consumer.process(functionalExpression)) return false; |
| } |
| } |
| } |
| } |
| } |
| } |
| return true; |
| } |
| }); |
| if (!accepted) return false; |
| } |
| } |
| |
| for (final PsiReference reference : ReferencesSearch.search(aClass, scope)) { |
| boolean accepted = ApplicationManager.getApplication().runReadAction(new Computable<Boolean>() { |
| @Override |
| public Boolean compute() { |
| final PsiElement element = reference.getElement(); |
| if (element != null) { |
| final PsiElement parent = element.getParent(); |
| if (parent instanceof PsiTypeElement) { |
| final PsiElement gParent = parent.getParent(); |
| if (gParent instanceof PsiVariable) { |
| final PsiExpression initializer = PsiUtil.skipParenthesizedExprDown(((PsiVariable)gParent).getInitializer()); |
| if (initializer instanceof PsiFunctionalExpression) { |
| if (!consumer.process((PsiFunctionalExpression)initializer)) return false; |
| } |
| for (PsiReference varRef : ReferencesSearch.search(parent, scope)) { |
| final PsiElement varElement = varRef.getElement(); |
| if (varElement != null) { |
| final PsiElement varElementParent = varElement.getParent(); |
| if (varElementParent instanceof PsiAssignmentExpression && |
| ((PsiAssignmentExpression)varElementParent).getLExpression() == varElement) { |
| final PsiExpression rExpression = PsiUtil.skipParenthesizedExprDown(((PsiAssignmentExpression)varElementParent).getRExpression()); |
| if (rExpression instanceof PsiFunctionalExpression) { |
| if (!consumer.process((PsiFunctionalExpression)rExpression)) return false; |
| } |
| } |
| } |
| } |
| } else if (gParent instanceof PsiMethod) { |
| final PsiReturnStatement[] returnStatements = ApplicationManager.getApplication().runReadAction( |
| new Computable<PsiReturnStatement[]>() { |
| @Override |
| public PsiReturnStatement[] compute() { |
| return PsiUtil.findReturnStatements((PsiMethod)gParent); |
| } |
| }); |
| for (PsiReturnStatement returnStatement : returnStatements) { |
| final PsiExpression returnValue = returnStatement.getReturnValue(); |
| if (returnValue instanceof PsiFunctionalExpression) { |
| if (!consumer.process((PsiFunctionalExpression)returnValue)) return false; |
| } |
| } |
| } |
| } |
| } |
| |
| return true; |
| } |
| }); |
| if (!accepted) return false; |
| |
| } |
| return true; |
| } |
| } |