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.resolve.lazy.descriptors;
018
019 import com.google.common.collect.Sets;
020 import org.jetbrains.annotations.NotNull;
021 import org.jetbrains.kotlin.descriptors.impl.AbstractLazyTypeParameterDescriptor;
022 import org.jetbrains.kotlin.lexer.KtTokens;
023 import org.jetbrains.kotlin.psi.*;
024 import org.jetbrains.kotlin.resolve.BindingContext;
025 import org.jetbrains.kotlin.resolve.lazy.ForceResolveUtil;
026 import org.jetbrains.kotlin.resolve.lazy.LazyClassContext;
027 import org.jetbrains.kotlin.resolve.lazy.LazyEntity;
028 import org.jetbrains.kotlin.resolve.source.KotlinSourceElementKt;
029 import org.jetbrains.kotlin.types.KotlinType;
030
031 import java.util.Set;
032
033 public class LazyTypeParameterDescriptor extends AbstractLazyTypeParameterDescriptor implements LazyEntity {
034 private final LazyClassContext c;
035
036 private final KtTypeParameter jetTypeParameter;
037
038 public LazyTypeParameterDescriptor(
039 @NotNull LazyClassContext c,
040 @NotNull LazyClassDescriptor containingDeclaration,
041 @NotNull KtTypeParameter jetTypeParameter,
042 int index) {
043 super(
044 c.getStorageManager(),
045 containingDeclaration,
046 jetTypeParameter.getNameAsSafeName(),
047 jetTypeParameter.getVariance(),
048 jetTypeParameter.hasModifier(KtTokens.REIFIED_KEYWORD),
049 index,
050 KotlinSourceElementKt.toSourceElement(jetTypeParameter)
051 );
052 this.c = c;
053 this.jetTypeParameter = jetTypeParameter;
054
055 this.c.getTrace().record(BindingContext.TYPE_PARAMETER, jetTypeParameter, this);
056 }
057
058 @NotNull
059 @Override
060 protected Set<KotlinType> resolveUpperBounds() {
061 Set<KotlinType> upperBounds = Sets.newLinkedHashSet();
062
063 KtTypeParameter jetTypeParameter = this.jetTypeParameter;
064
065 KtTypeReference extendsBound = jetTypeParameter.getExtendsBound();
066 if (extendsBound != null) {
067 KotlinType boundType = c.getDescriptorResolver().resolveTypeParameterExtendsBound(
068 this, extendsBound, getContainingDeclaration().getScopeForClassHeaderResolution(), c.getTrace());
069 upperBounds.add(boundType);
070 }
071
072 resolveUpperBoundsFromWhereClause(upperBounds);
073
074 if (upperBounds.isEmpty()) {
075 upperBounds.add(c.getModuleDescriptor().getBuiltIns().getDefaultBound());
076 }
077
078 return upperBounds;
079 }
080
081 private void resolveUpperBoundsFromWhereClause(Set<KotlinType> upperBounds) {
082 KtClassOrObject classOrObject = KtStubbedPsiUtil.getPsiOrStubParent(jetTypeParameter, KtClassOrObject.class, true);
083 if (classOrObject instanceof KtClass) {
084 KtClass ktClass = (KtClass) classOrObject;
085 for (KtTypeConstraint jetTypeConstraint : ktClass.getTypeConstraints()) {
086 KtSimpleNameExpression constrainedParameterName = jetTypeConstraint.getSubjectTypeParameterName();
087 if (constrainedParameterName != null) {
088 if (getName().equals(constrainedParameterName.getReferencedNameAsName())) {
089 c.getTrace().record(BindingContext.REFERENCE_TARGET, constrainedParameterName, this);
090
091 KtTypeReference boundTypeReference = jetTypeConstraint.getBoundTypeReference();
092 if (boundTypeReference != null) {
093 KotlinType boundType = resolveBoundType(boundTypeReference);
094 upperBounds.add(boundType);
095 }
096 }
097 }
098 }
099 }
100
101 }
102
103 private KotlinType resolveBoundType(@NotNull KtTypeReference boundTypeReference) {
104 return c.getTypeResolver()
105 .resolveType(getContainingDeclaration().getScopeForClassHeaderResolution(), boundTypeReference,
106 c.getTrace(), false);
107 }
108
109 @NotNull
110 @Override
111 public LazyClassDescriptor getContainingDeclaration() {
112 return (LazyClassDescriptor) super.getContainingDeclaration();
113 }
114
115 @Override
116 public void forceResolveAllContents() {
117 ForceResolveUtil.forceResolveAllContents(getAnnotations());
118 getContainingDeclaration();
119 getDefaultType();
120 getIndex();
121 ForceResolveUtil.forceResolveAllContents(getLowerBounds());
122 getOriginal();
123 ForceResolveUtil.forceResolveAllContents(getTypeConstructor());
124 ForceResolveUtil.forceResolveAllContents(getUpperBounds());
125 getUpperBoundsAsType();
126 getVariance();
127 }
128 }