| /* |
| * 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.resolve; |
| |
| import com.intellij.pom.java.LanguageLevel; |
| import com.intellij.psi.*; |
| import com.intellij.psi.infos.CandidateInfo; |
| import com.intellij.psi.infos.MethodCandidateInfo; |
| import com.intellij.psi.scope.PsiConflictResolver; |
| import com.intellij.psi.scope.PsiScopeProcessor; |
| import com.intellij.psi.scope.conflictResolvers.DuplicateConflictResolver; |
| import com.intellij.psi.scope.conflictResolvers.JavaMethodsConflictResolver; |
| import com.intellij.psi.scope.processor.MethodCandidatesProcessor; |
| import com.intellij.psi.scope.processor.MethodResolverProcessor; |
| import com.intellij.psi.util.MethodSignature; |
| import com.intellij.psi.util.PsiUtil; |
| import com.intellij.util.Function; |
| import com.intellij.util.containers.ContainerUtil; |
| import gnu.trove.THashSet; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Set; |
| |
| /** |
| * @author peter |
| */ |
| public class JavaMethodResolveHelper { |
| private final Set<MethodSignature> myDuplicates = new THashSet<MethodSignature>(); |
| |
| private final MethodCandidatesProcessor myProcessor; |
| @Nullable private final PsiType[] myArgumentTypes; |
| |
| public JavaMethodResolveHelper(@NotNull final PsiElement argumentList, PsiFile containingFile, @Nullable final PsiType[] argumentTypes) { |
| myArgumentTypes = argumentTypes; |
| final LanguageLevel languageLevel = PsiUtil.getLanguageLevel(argumentList); |
| final PsiConflictResolver resolver = argumentTypes == null ? DuplicateConflictResolver.INSTANCE : new JavaMethodsConflictResolver(argumentList, argumentTypes, |
| languageLevel); |
| myProcessor = new MethodResolverProcessor(argumentList, containingFile, new PsiConflictResolver[]{resolver}) { |
| @Override |
| protected MethodCandidateInfo createCandidateInfo(@NotNull final PsiMethod method, @NotNull final PsiSubstitutor substitutor, |
| final boolean staticProblem, |
| final boolean accessible, final boolean varargs) { |
| return JavaMethodResolveHelper.this |
| .createCandidateInfo(method, substitutor, staticProblem, myCurrentFileContext, !accessible, argumentList, argumentTypes, |
| languageLevel); |
| } |
| |
| @Override |
| protected boolean isAccepted(final PsiMethod candidate) { |
| return !candidate.isConstructor(); |
| } |
| }; |
| } |
| |
| protected MethodCandidateInfo createCandidateInfo(@NotNull PsiMethod method, |
| PsiSubstitutor substitutor, |
| boolean staticProblem, |
| PsiElement currentFileContext, |
| boolean accessProblem, |
| PsiElement argumentList, |
| PsiType[] argumentTypes, |
| @NotNull LanguageLevel languageLevel) { |
| return new MethodCandidateInfo(method, substitutor, accessProblem, staticProblem, argumentList, currentFileContext, argumentTypes, |
| PsiType.EMPTY_ARRAY, languageLevel); |
| } |
| |
| public void addMethod(@NotNull PsiMethod method, @NotNull PsiSubstitutor substitutor, boolean staticError) { |
| if (myDuplicates.add(method.getSignature(substitutor))) { |
| myProcessor.addMethod(method, substitutor, staticError); |
| } |
| } |
| |
| @NotNull |
| public ErrorType getResolveError() { |
| final List<CandidateInfo> candidates = getCandidates(); |
| if (candidates.size() != 1) return ErrorType.RESOLVE; |
| |
| if (!candidates.get(0).isStaticsScopeCorrect()) return ErrorType.STATIC; |
| |
| return getResolveError((MethodCandidateInfo)candidates.get(0)); |
| } |
| |
| protected List<CandidateInfo> getCandidates() { |
| return Arrays.asList(myProcessor.getCandidates()); |
| } |
| |
| protected ErrorType getResolveError(MethodCandidateInfo info) { |
| if (myArgumentTypes == null) return ErrorType.NONE; |
| |
| if (!info.isApplicable()) { |
| boolean hasNulls = false; |
| //noinspection ConstantConditions |
| final PsiParameter[] parameters = info.getElement().getParameterList().getParameters(); |
| if (myArgumentTypes.length == parameters.length) { |
| for (int i = 0; i < myArgumentTypes.length; i++) { |
| PsiType type = myArgumentTypes[i]; |
| if (type == null) { |
| hasNulls = true; |
| } |
| else if (!parameters[i].getType().isAssignableFrom(type)) { |
| return ErrorType.RESOLVE; |
| } |
| } |
| } |
| return hasNulls ? ErrorType.NONE : ErrorType.RESOLVE; |
| } |
| return ErrorType.NONE; |
| } |
| |
| public void handleEvent(final PsiScopeProcessor.Event event, final Object associated) { |
| myProcessor.handleEvent(event, associated); |
| } |
| |
| public enum ErrorType { |
| NONE, STATIC, RESOLVE |
| } |
| |
| public Collection<JavaMethodCandidateInfo> getMethods() { |
| return ContainerUtil.mapNotNull(getCandidates(), new Function<JavaResolveResult, JavaMethodCandidateInfo>() { |
| @Override |
| public JavaMethodCandidateInfo fun(final JavaResolveResult javaResolveResult) { |
| return new JavaMethodCandidateInfo((PsiMethod)javaResolveResult.getElement(), javaResolveResult.getSubstitutor()); |
| } |
| }); |
| } |
| } |