| /* |
| * 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.scope.conflictResolvers; |
| |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.openapi.progress.ProgressManager; |
| import com.intellij.openapi.projectRoots.JavaSdkVersion; |
| import com.intellij.openapi.projectRoots.JavaVersionService; |
| import com.intellij.openapi.util.Comparing; |
| import com.intellij.pom.java.LanguageLevel; |
| import com.intellij.psi.*; |
| import com.intellij.psi.impl.PsiSuperMethodImplUtil; |
| import com.intellij.psi.impl.source.resolve.graphInference.InferenceSession; |
| import com.intellij.psi.infos.CandidateInfo; |
| import com.intellij.psi.infos.MethodCandidateInfo; |
| import com.intellij.psi.scope.PsiConflictResolver; |
| import com.intellij.psi.search.GlobalSearchScope; |
| import com.intellij.psi.util.*; |
| import com.intellij.util.containers.HashSet; |
| import gnu.trove.THashMap; |
| import gnu.trove.THashSet; |
| import gnu.trove.TIntArrayList; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| /** |
| * Created by IntelliJ IDEA. |
| * User: ik |
| * Date: 10.06.2003 |
| * Time: 19:41:51 |
| * To change this template use Options | File Templates. |
| */ |
| public class JavaMethodsConflictResolver implements PsiConflictResolver{ |
| private static final Logger LOG = Logger.getInstance("#com.intellij.psi.scope.conflictResolvers.JavaMethodsConflictResolver"); |
| |
| private final PsiElement myArgumentsList; |
| private PsiType[] myActualParameterTypes; |
| protected LanguageLevel myLanguageLevel; |
| |
| public JavaMethodsConflictResolver(@NotNull PsiExpressionList list, @NotNull LanguageLevel languageLevel) { |
| this(list, null, languageLevel); |
| } |
| |
| public JavaMethodsConflictResolver(@NotNull PsiElement argumentsList, |
| PsiType[] actualParameterTypes, |
| @NotNull LanguageLevel languageLevel) { |
| myArgumentsList = argumentsList; |
| myActualParameterTypes = actualParameterTypes; |
| myLanguageLevel = languageLevel; |
| } |
| |
| @Override |
| public CandidateInfo resolveConflict(@NotNull List<CandidateInfo> conflicts){ |
| if (conflicts.isEmpty()) return null; |
| if (conflicts.size() == 1) return conflicts.get(0); |
| |
| boolean atLeastOneMatch = checkParametersNumber(conflicts, getActualParametersLength(), true); |
| if (conflicts.size() == 1) return conflicts.get(0); |
| |
| checkSameSignatures(conflicts); |
| if (conflicts.size() == 1) return conflicts.get(0); |
| |
| checkAccessStaticLevels(conflicts, true); |
| if (conflicts.size() == 1) return conflicts.get(0); |
| |
| checkParametersNumber(conflicts, getActualParametersLength(), false); |
| if (conflicts.size() == 1) return conflicts.get(0); |
| |
| final int applicabilityLevel = checkApplicability(conflicts); |
| if (conflicts.size() == 1) return conflicts.get(0); |
| |
| // makes no sense to do further checks, because if no one candidate matches by parameters count |
| // then noone can be more specific |
| if (!atLeastOneMatch) return null; |
| |
| checkLambdaApplicable(conflicts, myLanguageLevel); |
| if (conflicts.size() == 1) return conflicts.get(0); |
| |
| checkSpecifics(conflicts, applicabilityLevel, myLanguageLevel); |
| if (conflicts.size() == 1) return conflicts.get(0); |
| |
| checkPrimitiveVarargs(conflicts, getActualParametersLength()); |
| if (conflicts.size() == 1) return conflicts.get(0); |
| |
| checkAccessStaticLevels(conflicts, false); |
| if (conflicts.size() == 1) return conflicts.get(0); |
| |
| Set<CandidateInfo> uniques = new THashSet<CandidateInfo>(conflicts); |
| if (uniques.size() == 1) return uniques.iterator().next(); |
| return null; |
| } |
| |
| private void checkLambdaApplicable(@NotNull List<CandidateInfo> conflicts, @NotNull LanguageLevel languageLevel) { |
| if (!languageLevel.isAtLeast(LanguageLevel.JDK_1_8)) return; |
| for (int i = 0; i < getActualParametersLength(); i++) { |
| |
| PsiExpression expression; |
| if (myArgumentsList instanceof PsiExpressionList) { |
| expression = ((PsiExpressionList)myArgumentsList).getExpressions()[i]; |
| } |
| else { |
| final PsiType argType = getActualParameterTypes()[i]; |
| expression = argType instanceof PsiLambdaExpressionType ? ((PsiLambdaExpressionType)argType).getExpression() : null; |
| } |
| |
| final PsiLambdaExpression lambdaExpression = findNestedLambdaExpression(expression); |
| if (lambdaExpression != null) { |
| checkLambdaApplicable(conflicts, i, lambdaExpression); |
| } |
| } |
| } |
| |
| private static PsiLambdaExpression findNestedLambdaExpression(PsiExpression expression) { |
| if (expression instanceof PsiLambdaExpression) { |
| return (PsiLambdaExpression)expression; |
| } |
| else if (expression instanceof PsiParenthesizedExpression) { |
| return findNestedLambdaExpression(((PsiParenthesizedExpression)expression).getExpression()); |
| } |
| else if (expression instanceof PsiConditionalExpression) { |
| PsiLambdaExpression lambdaExpression = findNestedLambdaExpression(((PsiConditionalExpression)expression).getThenExpression()); |
| if (lambdaExpression != null) { |
| return lambdaExpression; |
| } |
| return findNestedLambdaExpression(((PsiConditionalExpression)expression).getElseExpression()); |
| } |
| return null; |
| } |
| |
| private static void checkLambdaApplicable(@NotNull List<CandidateInfo> conflicts, int i, @NotNull PsiLambdaExpression lambdaExpression) { |
| for (Iterator<CandidateInfo> iterator = conflicts.iterator(); iterator.hasNext(); ) { |
| ProgressManager.checkCanceled(); |
| final CandidateInfo conflict = iterator.next(); |
| final PsiMethod method = (PsiMethod)conflict.getElement(); |
| final PsiParameter[] methodParameters = method.getParameterList().getParameters(); |
| if (methodParameters.length == 0) continue; |
| final PsiParameter param = i < methodParameters.length ? methodParameters[i] : methodParameters[methodParameters.length - 1]; |
| final PsiType paramType = param.getType(); |
| // http://docs.oracle.com/javase/specs/jls/se8/html/jls-15.html#jls-15.12.2.1 |
| // A lambda expression or a method reference expression is potentially compatible with a type variable if the type variable is a type parameter of the candidate method. |
| final PsiClass paramClass = PsiUtil.resolveClassInType(paramType); |
| if (paramClass instanceof PsiTypeParameter && ((PsiTypeParameter)paramClass).getOwner() == method) continue; |
| if (!lambdaExpression.isAcceptable(((MethodCandidateInfo)conflict).getSubstitutor(false).substitute(paramType), |
| InferenceSession.isPertinentToApplicability(lambdaExpression, method))) { |
| iterator.remove(); |
| } |
| } |
| } |
| |
| public void checkSpecifics(@NotNull List<CandidateInfo> conflicts, |
| @MethodCandidateInfo.ApplicabilityLevelConstant int applicabilityLevel, |
| @NotNull LanguageLevel languageLevel) { |
| final boolean applicable = applicabilityLevel > MethodCandidateInfo.ApplicabilityLevel.NOT_APPLICABLE; |
| |
| int conflictsCount = conflicts.size(); |
| // Specifics |
| if (applicable) { |
| final CandidateInfo[] newConflictsArray = conflicts.toArray(new CandidateInfo[conflicts.size()]); |
| for (int i = 1; i < conflictsCount; i++) { |
| final CandidateInfo method = newConflictsArray[i]; |
| for (int j = 0; j < i; j++) { |
| ProgressManager.checkCanceled(); |
| final CandidateInfo conflict = newConflictsArray[j]; |
| if (nonComparable(method, conflict)) continue; |
| switch (isMoreSpecific((MethodCandidateInfo)method, (MethodCandidateInfo)conflict, applicabilityLevel, languageLevel)) { |
| case FIRST: |
| conflicts.remove(conflict); |
| break; |
| case SECOND: |
| conflicts.remove(method); |
| break; |
| case NEITHER: |
| break; |
| } |
| } |
| } |
| } |
| } |
| |
| protected boolean nonComparable(@NotNull CandidateInfo method, @NotNull CandidateInfo conflict) { |
| assert method != conflict; |
| return false; |
| } |
| |
| protected static void checkAccessStaticLevels(@NotNull List<CandidateInfo> conflicts, boolean checkAccessible) { |
| int conflictsCount = conflicts.size(); |
| |
| int maxCheckLevel = -1; |
| int[] checkLevels = new int[conflictsCount]; |
| int index = 0; |
| for (final CandidateInfo conflict : conflicts) { |
| ProgressManager.checkCanceled(); |
| final MethodCandidateInfo method = (MethodCandidateInfo)conflict; |
| final int level = checkAccessible ? getCheckAccessLevel(method) : getCheckStaticLevel(method); |
| checkLevels[index++] = level; |
| maxCheckLevel = Math.max(maxCheckLevel, level); |
| } |
| |
| for (int i = conflictsCount - 1; i >= 0; i--) { |
| // check for level |
| if (checkLevels[i] < maxCheckLevel) { |
| conflicts.remove(i); |
| } |
| } |
| } |
| |
| protected void checkSameSignatures(@NotNull List<CandidateInfo> conflicts) { |
| // candidates should go in order of class hierarchy traversal |
| // in order for this to work |
| Map<MethodSignature, CandidateInfo> signatures = new THashMap<MethodSignature, CandidateInfo>(conflicts.size()); |
| Set<PsiMethod> superMethods = new HashSet<PsiMethod>(); |
| for (CandidateInfo conflict : conflicts) { |
| final PsiMethod method = ((MethodCandidateInfo)conflict).getElement(); |
| for (HierarchicalMethodSignature methodSignature : method.getHierarchicalMethodSignature().getSuperSignatures()) { |
| final PsiMethod superMethod = methodSignature.getMethod(); |
| if (!CommonClassNames.JAVA_LANG_OBJECT.equals(superMethod.getContainingClass().getQualifiedName())) { |
| superMethods.add(superMethod); |
| } |
| } |
| } |
| nextConflict: |
| for (int i=0; i<conflicts.size();i++) { |
| ProgressManager.checkCanceled(); |
| CandidateInfo info = conflicts.get(i); |
| PsiMethod method = (PsiMethod)info.getElement(); |
| |
| if (!method.hasModifierProperty(PsiModifier.STATIC) && superMethods.contains(method)) { |
| conflicts.remove(i); |
| i--; |
| continue; |
| } |
| |
| PsiClass class1 = method.getContainingClass(); |
| PsiSubstitutor infoSubstitutor = ((MethodCandidateInfo)info).getSubstitutor(false); |
| MethodSignature signature = method.getSignature(infoSubstitutor); |
| CandidateInfo existing = signatures.get(signature); |
| |
| if (existing == null) { |
| signatures.put(signature, info); |
| continue; |
| } |
| PsiMethod existingMethod = (PsiMethod)existing.getElement(); |
| PsiClass existingClass = existingMethod.getContainingClass(); |
| if (class1 != null && existingClass != null && |
| class1.isInterface() && CommonClassNames.JAVA_LANG_OBJECT.equals(existingClass.getQualifiedName())) { //prefer interface methods to methods from Object |
| signatures.put(signature, info); |
| continue; |
| } |
| if (method == existingMethod) { |
| PsiElement scope1 = info.getCurrentFileResolveScope(); |
| PsiElement scope2 = existing.getCurrentFileResolveScope(); |
| if (scope1 instanceof PsiClass && |
| scope2 instanceof PsiClass && |
| PsiTreeUtil.isAncestor(scope1, scope2, true) && |
| !existing.isAccessible()) { //prefer methods from outer class to inaccessible base class methods |
| signatures.put(signature, info); |
| continue; |
| } |
| } |
| |
| // filter out methods with incorrect inferred bounds (for unrelated methods only) |
| boolean existingTypeParamAgree = areTypeParametersAgree(existing); |
| boolean infoTypeParamAgree = areTypeParametersAgree(info); |
| if (existingTypeParamAgree && !infoTypeParamAgree && !PsiSuperMethodImplUtil.isSuperMethodSmart(method, existingMethod)) { |
| conflicts.remove(i); |
| i--; |
| continue; |
| } |
| if (!existingTypeParamAgree && infoTypeParamAgree && !PsiSuperMethodImplUtil.isSuperMethodSmart(existingMethod, method)) { |
| signatures.put(signature, info); |
| int index = conflicts.indexOf(existing); |
| conflicts.remove(index); |
| i--; |
| continue; |
| } |
| |
| if (InheritanceUtil.isInheritorOrSelf(class1, existingClass, true) || |
| InheritanceUtil.isInheritorOrSelf(existingClass, class1, true)) { |
| PsiParameter[] parameters = method.getParameterList().getParameters(); |
| final PsiParameter[] existingParameters = existingMethod.getParameterList().getParameters(); |
| for (int i1 = 0, parametersLength = parameters.length; i1 < parametersLength; i1++) { |
| if (parameters[i1].getType() instanceof PsiArrayType && |
| !(existingParameters[i1].getType() instanceof PsiArrayType)) {//prefer more specific type |
| signatures.put(signature, info); |
| continue nextConflict; |
| } |
| } |
| PsiType returnType1 = method.getReturnType(); |
| PsiType returnType2 = existingMethod.getReturnType(); |
| if (returnType1 != null && returnType2 != null) { |
| returnType1 = infoSubstitutor.substitute(returnType1); |
| returnType2 = ((MethodCandidateInfo)existing).getSubstitutor(false).substitute(returnType2); |
| if (!returnType1.equals(returnType2) && returnType1.isAssignableFrom(returnType2)) { |
| conflicts.remove(i); |
| i--; |
| continue; |
| } |
| } |
| |
| // prefer derived class |
| signatures.put(signature, info); |
| } |
| else { |
| final PsiMethodCallExpression methodCallExpression = PsiTreeUtil.getParentOfType(myArgumentsList, PsiMethodCallExpression.class); |
| if (methodCallExpression != null) { |
| final PsiReferenceExpression expression = methodCallExpression.getMethodExpression(); |
| final PsiExpression qualifierExpression = expression.getQualifierExpression(); |
| PsiClass currentClass; |
| if (qualifierExpression != null) { |
| currentClass = PsiUtil.resolveClassInClassTypeOnly(qualifierExpression.getType()); |
| } |
| else { |
| currentClass = PsiTreeUtil.getParentOfType(expression, PsiClass.class); |
| } |
| |
| if (currentClass != null) { |
| final PsiSubstitutor eSubstitutor = TypeConversionUtil.getMaybeSuperClassSubstitutor(existingClass, currentClass, PsiSubstitutor.EMPTY, null); |
| final PsiSubstitutor cSubstitutor = TypeConversionUtil.getMaybeSuperClassSubstitutor(class1, currentClass, PsiSubstitutor.EMPTY, null); |
| if (eSubstitutor != null && cSubstitutor != null && |
| MethodSignatureUtil.areSignaturesEqual(existingMethod.getSignature(eSubstitutor), method.getSignature(cSubstitutor))) { |
| final PsiType returnType = eSubstitutor.substitute(existingMethod.getReturnType()); |
| final PsiType returnType1 = cSubstitutor.substitute(method.getReturnType()); |
| if (returnType != null && returnType1 != null && !returnType1.equals(returnType)) { |
| if (TypeConversionUtil.isAssignable(returnType, returnType1, false)) { |
| if (class1.isInterface() && !existingClass.isInterface()) continue; |
| conflicts.remove(existing); |
| } else { |
| if (!TypeConversionUtil.isAssignable(returnType1, returnType, false)) continue; |
| conflicts.remove(i); |
| } |
| i--; |
| break; |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| private static boolean areTypeParametersAgree(@NotNull CandidateInfo info) { |
| return ((MethodCandidateInfo)info).getPertinentApplicabilityLevel() != MethodCandidateInfo.ApplicabilityLevel.NOT_APPLICABLE; |
| } |
| |
| private static boolean checkParametersNumber(@NotNull List<CandidateInfo> conflicts, |
| final int argumentsCount, |
| boolean ignoreIfStaticsProblem) { |
| boolean atLeastOneMatch = false; |
| TIntArrayList unmatchedIndices = null; |
| for (int i = 0; i < conflicts.size(); i++) { |
| ProgressManager.checkCanceled(); |
| CandidateInfo info = conflicts.get(i); |
| if (ignoreIfStaticsProblem && !info.isStaticsScopeCorrect()) return true; |
| if (!(info instanceof MethodCandidateInfo)) continue; |
| PsiMethod method = ((MethodCandidateInfo)info).getElement(); |
| if (method.isVarArgs()) return true; |
| if (method.getParameterList().getParametersCount() == argumentsCount) { |
| // remove all unmatched before |
| if (unmatchedIndices != null) { |
| for (int u=unmatchedIndices.size()-1; u>=0; u--) { |
| int index = unmatchedIndices.get(u); |
| conflicts.remove(index); |
| i--; |
| } |
| unmatchedIndices = null; |
| } |
| atLeastOneMatch = true; |
| } |
| else if (atLeastOneMatch) { |
| conflicts.remove(i); |
| i--; |
| } |
| else { |
| if (unmatchedIndices == null) unmatchedIndices = new TIntArrayList(conflicts.size()-i); |
| unmatchedIndices.add(i); |
| } |
| } |
| |
| return atLeastOneMatch; |
| } |
| |
| @MethodCandidateInfo.ApplicabilityLevelConstant |
| public int checkApplicability(@NotNull List<CandidateInfo> conflicts) { |
| @MethodCandidateInfo.ApplicabilityLevelConstant int maxApplicabilityLevel = 0; |
| boolean toFilter = false; |
| for (CandidateInfo conflict : conflicts) { |
| ProgressManager.checkCanceled(); |
| @MethodCandidateInfo.ApplicabilityLevelConstant final int level = getPertinentApplicabilityLevel((MethodCandidateInfo)conflict); |
| if (maxApplicabilityLevel > 0 && maxApplicabilityLevel != level) { |
| toFilter = true; |
| } |
| if (level > maxApplicabilityLevel) { |
| maxApplicabilityLevel = level; |
| } |
| } |
| |
| if (toFilter) { |
| for (Iterator<CandidateInfo> iterator = conflicts.iterator(); iterator.hasNext();) { |
| ProgressManager.checkCanceled(); |
| CandidateInfo info = iterator.next(); |
| final int level = getPertinentApplicabilityLevel((MethodCandidateInfo)info); |
| if (level < maxApplicabilityLevel) { |
| iterator.remove(); |
| } |
| } |
| } |
| |
| return maxApplicabilityLevel; |
| } |
| |
| protected int getPertinentApplicabilityLevel(@NotNull MethodCandidateInfo conflict) { |
| return conflict.getPertinentApplicabilityLevel(); |
| } |
| |
| private static int getCheckAccessLevel(@NotNull MethodCandidateInfo method){ |
| boolean visible = method.isAccessible(); |
| return visible ? 1 : 0; |
| } |
| |
| private static int getCheckStaticLevel(@NotNull MethodCandidateInfo method){ |
| boolean available = method.isStaticsScopeCorrect(); |
| return (available ? 1 : 0) << 1 | |
| (method.getCurrentFileResolveScope() instanceof PsiImportStaticStatement ? 0 : 1); |
| } |
| |
| @NotNull |
| private PsiType[] getActualParameterTypes() { |
| PsiType[] types = myActualParameterTypes; |
| if (types == null) { |
| LOG.assertTrue(myArgumentsList instanceof PsiExpressionList, myArgumentsList); |
| myActualParameterTypes = types = getArgumentTypes(); |
| } |
| return types; |
| } |
| |
| private int getActualParametersLength() { |
| if (myActualParameterTypes == null) { |
| LOG.assertTrue(myArgumentsList instanceof PsiExpressionList, myArgumentsList); |
| return ((PsiExpressionList)myArgumentsList).getExpressions().length; |
| } |
| return myActualParameterTypes.length; |
| } |
| |
| @NotNull |
| protected PsiType[] getArgumentTypes() { |
| return ((PsiExpressionList)myArgumentsList).getExpressionTypes(); |
| } |
| |
| private enum Specifics { |
| FIRST, |
| SECOND, |
| NEITHER |
| } |
| |
| private static boolean isBoxingHappened(PsiType argType, PsiType parameterType, @NotNull LanguageLevel languageLevel) { |
| if (argType == null) return parameterType instanceof PsiPrimitiveType; |
| if (parameterType instanceof PsiClassType) { |
| parameterType = ((PsiClassType)parameterType).setLanguageLevel(languageLevel); |
| } |
| |
| return TypeConversionUtil.boxingConversionApplicable(parameterType, argType); |
| } |
| |
| private Specifics isMoreSpecific(@NotNull MethodCandidateInfo info1, |
| @NotNull MethodCandidateInfo info2, |
| @MethodCandidateInfo.ApplicabilityLevelConstant int applicabilityLevel, |
| @NotNull LanguageLevel languageLevel) { |
| PsiMethod method1 = info1.getElement(); |
| PsiMethod method2 = info2.getElement(); |
| final PsiClass class1 = method1.getContainingClass(); |
| final PsiClass class2 = method2.getContainingClass(); |
| |
| final PsiParameter[] params1 = method1.getParameterList().getParameters(); |
| final PsiParameter[] params2 = method2.getParameterList().getParameters(); |
| |
| final PsiTypeParameter[] typeParameters1 = method1.getTypeParameters(); |
| final PsiTypeParameter[] typeParameters2 = method2.getTypeParameters(); |
| final PsiSubstitutor classSubstitutor1 = info1.getSubstitutor(false); //substitutions for method type parameters will be ignored |
| final PsiSubstitutor classSubstitutor2 = info2.getSubstitutor(false); |
| |
| final int max = Math.max(params1.length, params2.length); |
| PsiType[] types1 = PsiType.createArray(max); |
| PsiType[] types2 = PsiType.createArray(max); |
| final boolean varargsPosition = applicabilityLevel == MethodCandidateInfo.ApplicabilityLevel.VARARGS; |
| for (int i = 0; i < max; i++) { |
| ProgressManager.checkCanceled(); |
| PsiType type1 = params1.length > 0 ? params1[Math.min(i, params1.length - 1)].getType() : null; |
| PsiType type2 = params2.length > 0 ? params2[Math.min(i, params2.length - 1)].getType() : null; |
| if (varargsPosition) { |
| if (type1 instanceof PsiEllipsisType && type2 instanceof PsiEllipsisType && |
| params1.length == params2.length && |
| (!JavaVersionService.getInstance().isAtLeast(class1, JavaSdkVersion.JDK_1_7) || ((PsiArrayType)type1).getComponentType().equalsToText(CommonClassNames.JAVA_LANG_OBJECT) || ((PsiArrayType)type2).getComponentType().equalsToText(CommonClassNames.JAVA_LANG_OBJECT))) { |
| type1 = ((PsiEllipsisType)type1).toArrayType(); |
| type2 = ((PsiEllipsisType)type2).toArrayType(); |
| } |
| else { |
| type1 = type1 instanceof PsiEllipsisType ? ((PsiArrayType)type1).getComponentType() : type1; |
| type2 = type2 instanceof PsiEllipsisType ? ((PsiArrayType)type2).getComponentType() : type2; |
| } |
| } |
| |
| types1[i] = type1; |
| types2[i] = type2; |
| } |
| |
| boolean sameBoxing = true; |
| int[] boxingHappened = new int[2]; |
| for (int i = 0; i < types1.length; i++) { |
| ProgressManager.checkCanceled(); |
| PsiType type1 = classSubstitutor1.substitute(types1[i]); |
| PsiType type2 = classSubstitutor2.substitute(types2[i]); |
| PsiType argType = i < getActualParameterTypes().length ? getActualParameterTypes()[i] : null; |
| |
| boolean boxingInFirst = false; |
| if (isBoxingHappened(argType, type1, languageLevel)) { |
| boxingHappened[0] += 1; |
| boxingInFirst = true; |
| } |
| |
| boolean boxingInSecond = false; |
| if (isBoxingHappened(argType, type2, languageLevel)) { |
| boxingHappened[1] += 1; |
| boxingInSecond = true; |
| } |
| sameBoxing &= boxingInFirst == boxingInSecond; |
| } |
| if (boxingHappened[0] == 0 && boxingHappened[1] > 0) return Specifics.FIRST; |
| if (boxingHappened[0] > 0 && boxingHappened[1] == 0) return Specifics.SECOND; |
| |
| if (sameBoxing) { |
| final PsiSubstitutor siteSubstitutor1 = info1.getSiteSubstitutor(); |
| final PsiSubstitutor siteSubstitutor2 = info2.getSiteSubstitutor(); |
| |
| final PsiType[] types2AtSite = typesAtSite(types2, siteSubstitutor2); |
| final PsiType[] types1AtSite = typesAtSite(types1, siteSubstitutor1); |
| |
| final PsiSubstitutor methodSubstitutor1 = calculateMethodSubstitutor(typeParameters1, method1, siteSubstitutor1, types1, types2AtSite, |
| languageLevel); |
| boolean applicable12 = isApplicableTo(types2AtSite, method1, languageLevel, varargsPosition, methodSubstitutor1, method2); |
| |
| final PsiSubstitutor methodSubstitutor2 = calculateMethodSubstitutor(typeParameters2, method2, siteSubstitutor2, types2, types1AtSite, languageLevel); |
| boolean applicable21 = isApplicableTo(types1AtSite, method2, languageLevel, varargsPosition, methodSubstitutor2, method1); |
| |
| if (!myLanguageLevel.isAtLeast(LanguageLevel.JDK_1_8)) { |
| final boolean typeArgsApplicable12 = GenericsUtil.isTypeArgumentsApplicable(typeParameters1, methodSubstitutor1, myArgumentsList, !applicable21); |
| final boolean typeArgsApplicable21 = GenericsUtil.isTypeArgumentsApplicable(typeParameters2, methodSubstitutor2, myArgumentsList, !applicable12); |
| |
| if (!typeArgsApplicable12) { |
| applicable12 = false; |
| } |
| |
| if (!typeArgsApplicable21) { |
| applicable21 = false; |
| } |
| } |
| |
| if (applicable12 || applicable21) { |
| |
| if (applicable12 && !applicable21) return Specifics.SECOND; |
| if (applicable21 && !applicable12) return Specifics.FIRST; |
| |
| final boolean abstract1 = method1.hasModifierProperty(PsiModifier.ABSTRACT); |
| final boolean abstract2 = method2.hasModifierProperty(PsiModifier.ABSTRACT); |
| if (abstract1 && !abstract2) { |
| return Specifics.SECOND; |
| } |
| if (abstract2 && !abstract1) { |
| return Specifics.FIRST; |
| } |
| |
| } |
| |
| if (languageLevel.isAtLeast(LanguageLevel.JDK_1_8) && myArgumentsList instanceof PsiExpressionList && (typeParameters1.length == 0 || typeParameters2.length == 0)) { |
| boolean toCompareFunctional = false; |
| if (types1.length > 0 && types2.length > 0) { |
| for (int i = 0; i < getActualParametersLength(); i++) { |
| final PsiType type1 = types1[Math.min(i, types1.length - 1)]; |
| final PsiType type2 = types2[Math.min(i, types2.length - 1)]; |
| //from 15.12.2.5 Choosing the Most Specific Method |
| //In addition, a functional interface type S is more specific than a functional interface type T for an expression exp |
| // if T is not a subtype of S and one of the following conditions apply. |
| if (LambdaUtil.isFunctionalType(type1) && !TypeConversionUtil.erasure(type1).isAssignableFrom(type2) && |
| LambdaUtil.isFunctionalType(type2) && !TypeConversionUtil.erasure(type2).isAssignableFrom(type1)) { |
| types1AtSite[Math.min(i, types1.length - 1)] = PsiType.NULL; |
| types2AtSite[Math.min(i, types2.length - 1)] = PsiType.NULL; |
| toCompareFunctional = true; |
| } |
| } |
| } |
| |
| if (toCompareFunctional) { |
| final boolean applicable12ignoreFunctionalType = isApplicableTo(types2AtSite, method1, languageLevel, varargsPosition, |
| calculateMethodSubstitutor(typeParameters1, method1, siteSubstitutor1, types1, types2AtSite, languageLevel), null); |
| final boolean applicable21ignoreFunctionalType = isApplicableTo(types1AtSite, method2, languageLevel, varargsPosition, |
| calculateMethodSubstitutor(typeParameters2, method2, siteSubstitutor2, types2, types1AtSite, languageLevel), null); |
| |
| if (applicable12ignoreFunctionalType || applicable21ignoreFunctionalType) { |
| Specifics specifics = null; |
| for (int i = 0; i < getActualParametersLength(); i++) { |
| if (types1AtSite[Math.min(i, types1.length - 1)] == PsiType.NULL && |
| types2AtSite[Math.min(i, types2.length - 1)] == PsiType.NULL) { |
| Specifics specific = isFunctionalTypeMoreSpecific(info1, info2, ((PsiExpressionList)myArgumentsList).getExpressions()[i], i); |
| if (specific == Specifics.NEITHER) { |
| specifics = Specifics.NEITHER; |
| break; |
| } |
| |
| if (specifics == null) { |
| specifics = specific; |
| } else if (specifics != specific) { |
| specifics = Specifics.NEITHER; |
| break; |
| } |
| } |
| } |
| |
| if (!applicable12ignoreFunctionalType && applicable21ignoreFunctionalType) { |
| return specifics == Specifics.FIRST ? Specifics.FIRST : Specifics.NEITHER; |
| } |
| |
| if (!applicable21ignoreFunctionalType && applicable12ignoreFunctionalType) { |
| return specifics == Specifics.SECOND ? Specifics.SECOND : Specifics.NEITHER; |
| } |
| |
| return specifics; |
| } |
| } |
| } |
| } |
| else if (varargsPosition) { |
| final PsiType lastParamType1 = classSubstitutor1.substitute(types1[types1.length - 1]); |
| final PsiType lastParamType2 = classSubstitutor2.substitute(types2[types1.length - 1]); |
| final boolean assignable1 = TypeConversionUtil.isAssignable(lastParamType2, lastParamType1); |
| final boolean assignable2 = TypeConversionUtil.isAssignable(lastParamType1, lastParamType2); |
| if (assignable1 && !assignable2) { |
| return Specifics.FIRST; |
| } |
| if (assignable2 && !assignable1) { |
| return Specifics.SECOND; |
| } |
| } |
| |
| if (class1 != class2) { |
| if (class2.isInheritor(class1, true) || class1.isInterface() && !class2.isInterface()) { |
| if (MethodSignatureUtil.isSubsignature(method1.getSignature(info1.getSubstitutor(false)), method2.getSignature(info2.getSubstitutor(false)))) { |
| return Specifics.SECOND; |
| } |
| else if (method1.hasModifierProperty(PsiModifier.STATIC) && method2.hasModifierProperty(PsiModifier.STATIC) && boxingHappened[0] == 0) { |
| return Specifics.SECOND; |
| } |
| } |
| else if (class1.isInheritor(class2, true) || class2.isInterface()) { |
| if (MethodSignatureUtil.areErasedParametersEqual(method1.getSignature(PsiSubstitutor.EMPTY), method2.getSignature(PsiSubstitutor.EMPTY)) && |
| MethodSignatureUtil.isSubsignature(method2.getSignature(info2.getSubstitutor(false)), method1.getSignature(info1.getSubstitutor(false)))) { |
| return Specifics.FIRST; |
| } |
| else if (method1.hasModifierProperty(PsiModifier.STATIC) && method2.hasModifierProperty(PsiModifier.STATIC) && boxingHappened[0] == 0) { |
| return Specifics.FIRST; |
| } |
| } |
| } |
| |
| final boolean raw1 = PsiUtil.isRawSubstitutor(method1, classSubstitutor1); |
| final boolean raw2 = PsiUtil.isRawSubstitutor(method2, classSubstitutor2); |
| if (raw1 ^ raw2) { |
| return raw1 ? Specifics.SECOND : Specifics.FIRST; |
| } |
| |
| final boolean varargs1 = info1.isVarargs(); |
| final boolean varargs2 = info2.isVarargs(); |
| if (varargs1 ^ varargs2) { |
| return varargs1 ? Specifics.SECOND : Specifics.FIRST; |
| } |
| |
| return Specifics.NEITHER; |
| } |
| |
| private boolean isApplicableTo(@NotNull PsiType[] types2AtSite, |
| @NotNull PsiMethod method1, |
| @NotNull LanguageLevel languageLevel, |
| boolean varargsPosition, |
| @NotNull PsiSubstitutor methodSubstitutor1, |
| PsiMethod method2) { |
| if (languageLevel.isAtLeast(LanguageLevel.JDK_1_8) && method2 != null && method1.getTypeParameters().length > 0 && myArgumentsList instanceof PsiExpressionList) { |
| final PsiElement parent = myArgumentsList.getParent(); |
| if (parent instanceof PsiCallExpression && ((PsiCallExpression)parent).getTypeArguments().length == 0) { |
| return InferenceSession.isMoreSpecific(method2, method1, ((PsiExpressionList)myArgumentsList).getExpressions(), myArgumentsList, varargsPosition); |
| } |
| } |
| final int applicabilityLevel = PsiUtil.getApplicabilityLevel(method1, methodSubstitutor1, types2AtSite, languageLevel, false, varargsPosition); |
| return applicabilityLevel > MethodCandidateInfo.ApplicabilityLevel.NOT_APPLICABLE; |
| } |
| |
| @NotNull |
| private static PsiType[] typesAtSite(@NotNull PsiType[] types1, @NotNull PsiSubstitutor siteSubstitutor1) { |
| final PsiType[] types = PsiType.createArray(types1.length); |
| for (int i = 0; i < types1.length; i++) { |
| types[i] = siteSubstitutor1.substitute(types1[i]); |
| } |
| return types; |
| } |
| |
| @NotNull |
| private static PsiSubstitutor calculateMethodSubstitutor(@NotNull PsiTypeParameter[] typeParameters, |
| @NotNull PsiMethod method, |
| @NotNull PsiSubstitutor siteSubstitutor, |
| @NotNull PsiType[] types1, |
| @NotNull PsiType[] types2, |
| @NotNull LanguageLevel languageLevel) { |
| PsiSubstitutor substitutor = PsiResolveHelper.SERVICE.getInstance(method.getProject()) |
| .inferTypeArguments(typeParameters, types1, types2, languageLevel); |
| for (PsiTypeParameter typeParameter : PsiUtil.typeParametersIterable(method)) { |
| ProgressManager.checkCanceled(); |
| LOG.assertTrue(typeParameter != null); |
| if (!substitutor.getSubstitutionMap().containsKey(typeParameter)) { |
| PsiType type = siteSubstitutor.substitute(typeParameter); |
| if (type instanceof PsiClassType && typeParameter.getOwner() == method) { |
| final PsiClass aClass = ((PsiClassType)type).resolve(); |
| if (aClass instanceof PsiTypeParameter && ((PsiTypeParameter)aClass).getOwner() == method) { |
| type = TypeConversionUtil.erasure(type, siteSubstitutor); |
| } |
| } |
| substitutor = substitutor.put(typeParameter, type); |
| } else { |
| final PsiType type = substitutor.substitute(typeParameter); |
| if (type instanceof PsiClassType) { |
| final PsiClass aClass = ((PsiClassType)type).resolve(); |
| if (aClass instanceof PsiTypeParameter) { |
| substitutor = substitutor.put(typeParameter, JavaPsiFacade.getElementFactory(aClass.getProject()).createType(aClass, siteSubstitutor)); |
| } |
| } |
| } |
| } |
| return substitutor; |
| } |
| |
| public void checkPrimitiveVarargs(@NotNull List<CandidateInfo> conflicts, |
| final int argumentsCount) { |
| if (JavaVersionService.getInstance().isAtLeast(myArgumentsList, JavaSdkVersion.JDK_1_7)) return; |
| CandidateInfo objectVararg = null; |
| for (CandidateInfo conflict : conflicts) { |
| ProgressManager.checkCanceled(); |
| final PsiMethod method = (PsiMethod)conflict.getElement(); |
| final int parametersCount = method.getParameterList().getParametersCount(); |
| if (method.isVarArgs() && parametersCount - 1 == argumentsCount) { |
| final PsiType type = method.getParameterList().getParameters()[parametersCount - 1].getType(); |
| final PsiType componentType = ((PsiArrayType)type).getComponentType(); |
| final PsiClassType classType = PsiType.getJavaLangObject(method.getManager(), GlobalSearchScope.allScope(method.getProject())); |
| if (Comparing.equal(componentType, classType)) { |
| objectVararg = conflict; |
| } |
| } |
| } |
| |
| if (objectVararg != null) { |
| for (CandidateInfo conflict : conflicts) { |
| ProgressManager.checkCanceled(); |
| PsiMethod method = (PsiMethod)conflict.getElement(); |
| if (method != objectVararg && method.isVarArgs()) { |
| final int paramsCount = method.getParameterList().getParametersCount(); |
| final PsiType type = method.getParameterList().getParameters()[paramsCount - 1].getType(); |
| final PsiType componentType = ((PsiArrayType)type).getComponentType(); |
| if (argumentsCount == paramsCount - 1 && componentType instanceof PsiPrimitiveType) { |
| conflicts.remove(objectVararg); |
| break; |
| } |
| } |
| } |
| } |
| } |
| |
| @Nullable |
| private static PsiType getFunctionalType(int functionalTypeIdx, @NotNull CandidateInfo candidateInfo) { |
| final PsiMethod psiMethod = (PsiMethod)candidateInfo.getElement(); |
| LOG.assertTrue(true); |
| final PsiParameter[] methodParameters = psiMethod.getParameterList().getParameters(); |
| if (methodParameters.length == 0) return null; |
| final PsiParameter param = functionalTypeIdx < methodParameters.length ? methodParameters[functionalTypeIdx] : methodParameters[methodParameters.length - 1]; |
| return ((MethodCandidateInfo)candidateInfo).getSiteSubstitutor().substitute(param.getType()); |
| } |
| |
| @NotNull |
| private static Specifics isFunctionalTypeMoreSpecific(@NotNull CandidateInfo method, |
| @NotNull CandidateInfo conflict, |
| PsiExpression expr, |
| int functionalInterfaceIdx) { |
| if (expr instanceof PsiParenthesizedExpression) { |
| return isFunctionalTypeMoreSpecific(method, conflict, ((PsiParenthesizedExpression)expr).getExpression(), functionalInterfaceIdx); |
| } |
| if (expr instanceof PsiConditionalExpression) { |
| final Specifics thenSpecifics = |
| isFunctionalTypeMoreSpecific(method, conflict, ((PsiConditionalExpression)expr).getThenExpression(), functionalInterfaceIdx); |
| final Specifics elseSpecifics = |
| isFunctionalTypeMoreSpecific(method, conflict, ((PsiConditionalExpression)expr).getElseExpression(), functionalInterfaceIdx); |
| return thenSpecifics == elseSpecifics ? thenSpecifics : Specifics.NEITHER; |
| } |
| |
| if (expr instanceof PsiLambdaExpression || expr instanceof PsiMethodReferenceExpression) { |
| |
| if (expr instanceof PsiLambdaExpression && !((PsiLambdaExpression)expr).hasFormalParameterTypes()) { |
| return Specifics.NEITHER; |
| } |
| if (expr instanceof PsiMethodReferenceExpression && !((PsiMethodReferenceExpression)expr).isExact()) { |
| return Specifics.NEITHER; |
| } |
| |
| final PsiType sType = getFunctionalType(functionalInterfaceIdx, method); |
| final PsiType tType = getFunctionalType(functionalInterfaceIdx, conflict); |
| if (LambdaUtil.isFunctionalType(sType) && LambdaUtil.isFunctionalType(tType)) { |
| final boolean specific12 = InferenceSession.isFunctionalTypeMoreSpecificOnExpression(sType, tType, expr); |
| final boolean specific21 = InferenceSession.isFunctionalTypeMoreSpecificOnExpression(tType, sType, expr); |
| if (specific12 && !specific21) return Specifics.FIRST; |
| if (!specific12 && specific21) return Specifics.SECOND; |
| } |
| } |
| return Specifics.NEITHER; |
| } |
| } |
