001 /*
002 * Copyright 2010-2015 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017 package org.jetbrains.kotlin.load.java.components;
018
019 import kotlin.Unit;
020 import kotlin.jvm.functions.Function1;
021 import org.jetbrains.annotations.NotNull;
022 import org.jetbrains.annotations.Nullable;
023 import org.jetbrains.kotlin.descriptors.*;
024 import org.jetbrains.kotlin.load.java.structure.*;
025 import org.jetbrains.kotlin.name.FqName;
026 import org.jetbrains.kotlin.name.Name;
027 import org.jetbrains.kotlin.resolve.NonReportingOverrideStrategy;
028 import org.jetbrains.kotlin.resolve.OverridingUtil;
029 import org.jetbrains.kotlin.serialization.deserialization.ErrorReporter;
030
031 import java.util.Collection;
032 import java.util.LinkedHashSet;
033 import java.util.List;
034 import java.util.Set;
035
036 public final class DescriptorResolverUtils {
037 private DescriptorResolverUtils() {
038 }
039
040 @NotNull
041 public static <D extends CallableMemberDescriptor> Collection<D> resolveOverridesForNonStaticMembers(
042 @NotNull Name name, @NotNull Collection<D> membersFromSupertypes, @NotNull Collection<D> membersFromCurrent,
043 @NotNull ClassDescriptor classDescriptor, @NotNull ErrorReporter errorReporter
044 ) {
045 return resolveOverrides(name, membersFromSupertypes, membersFromCurrent, classDescriptor, errorReporter, false);
046 }
047
048 @NotNull
049 public static <D extends CallableMemberDescriptor> Collection<D> resolveOverridesForStaticMembers(
050 @NotNull Name name, @NotNull Collection<D> membersFromSupertypes, @NotNull Collection<D> membersFromCurrent,
051 @NotNull ClassDescriptor classDescriptor, @NotNull ErrorReporter errorReporter
052 ) {
053 return resolveOverrides(name, membersFromSupertypes, membersFromCurrent, classDescriptor, errorReporter, true);
054 }
055
056 @NotNull
057 private static <D extends CallableMemberDescriptor> Collection<D> resolveOverrides(
058 @NotNull Name name,
059 @NotNull Collection<D> membersFromSupertypes,
060 @NotNull Collection<D> membersFromCurrent,
061 @NotNull ClassDescriptor classDescriptor,
062 @NotNull final ErrorReporter errorReporter,
063 final boolean isStaticContext
064 ) {
065 final Set<D> result = new LinkedHashSet<D>();
066
067 OverridingUtil.generateOverridesInFunctionGroup(
068 name, membersFromSupertypes, membersFromCurrent, classDescriptor,
069 new NonReportingOverrideStrategy() {
070 @Override
071 @SuppressWarnings("unchecked")
072 public void addFakeOverride(@NotNull CallableMemberDescriptor fakeOverride) {
073 OverridingUtil.resolveUnknownVisibilityForMember(fakeOverride, new Function1<CallableMemberDescriptor, Unit>() {
074 @Override
075 public Unit invoke(@NotNull CallableMemberDescriptor descriptor) {
076 errorReporter.reportCannotInferVisibility(descriptor);
077 return Unit.INSTANCE;
078 }
079 });
080 result.add((D) fakeOverride);
081 }
082
083 @Override
084 public void conflict(@NotNull CallableMemberDescriptor fromSuper, @NotNull CallableMemberDescriptor fromCurrent) {
085 // nop
086 }
087
088 @Override
089 public void setOverriddenDescriptors(
090 @NotNull CallableMemberDescriptor member, @NotNull Collection<? extends CallableMemberDescriptor> overridden
091 ) {
092 // do not set overridden descriptors for declared static fields and methods from java
093 if (isStaticContext && member.getKind() != CallableMemberDescriptor.Kind.FAKE_OVERRIDE) {
094 return;
095 }
096 super.setOverriddenDescriptors(member, overridden);
097 }
098 }
099 );
100
101 return result;
102 }
103
104 @Nullable
105 public static ValueParameterDescriptor getAnnotationParameterByName(@NotNull Name name, @NotNull ClassDescriptor annotationClass) {
106 Collection<ClassConstructorDescriptor> constructors = annotationClass.getConstructors();
107 if (constructors.size() != 1) return null;
108
109 for (ValueParameterDescriptor parameter : constructors.iterator().next().getValueParameters()) {
110 if (parameter.getName().equals(name)) {
111 return parameter;
112 }
113 }
114
115 return null;
116 }
117
118 public static boolean isObjectMethodInInterface(@NotNull JavaMember member) {
119 return member.getContainingClass().isInterface() && member instanceof JavaMethod && isObjectMethod((JavaMethod) member);
120 }
121
122 public static boolean isObjectMethod(@NotNull JavaMethod method) {
123 String name = method.getName().asString();
124 if (name.equals("toString") || name.equals("hashCode")) {
125 return method.getValueParameters().isEmpty();
126 }
127 else if (name.equals("equals")) {
128 return isMethodWithOneParameterWithFqName(method, "java.lang.Object");
129 }
130 return false;
131 }
132
133 private static boolean isMethodWithOneParameterWithFqName(@NotNull JavaMethod method, @NotNull String fqName) {
134 List<JavaValueParameter> parameters = method.getValueParameters();
135 if (parameters.size() == 1) {
136 JavaType type = parameters.get(0).getType();
137 if (type instanceof JavaClassifierType) {
138 JavaClassifier classifier = ((JavaClassifierType) type).getClassifier();
139 if (classifier instanceof JavaClass) {
140 FqName classFqName = ((JavaClass) classifier).getFqName();
141 return classFqName != null && classFqName.asString().equals(fqName);
142 }
143 }
144 }
145 return false;
146 }
147 }