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.JetTokens;
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.types.JetType;
029
030 import java.util.Set;
031
032 import static org.jetbrains.kotlin.resolve.source.SourcePackage.toSourceElement;
033
034 public class LazyTypeParameterDescriptor extends AbstractLazyTypeParameterDescriptor implements LazyEntity {
035 private final LazyClassContext c;
036
037 private final JetTypeParameter jetTypeParameter;
038
039 public LazyTypeParameterDescriptor(
040 @NotNull LazyClassContext c,
041 @NotNull LazyClassDescriptor containingDeclaration,
042 @NotNull JetTypeParameter jetTypeParameter,
043 int index) {
044 super(
045 c.getStorageManager(),
046 containingDeclaration,
047 jetTypeParameter.getNameAsSafeName(),
048 jetTypeParameter.getVariance(),
049 jetTypeParameter.hasModifier(JetTokens.REIFIED_KEYWORD),
050 index,
051 toSourceElement(jetTypeParameter)
052 );
053 this.c = c;
054 this.jetTypeParameter = jetTypeParameter;
055
056 this.c.getTrace().record(BindingContext.TYPE_PARAMETER, jetTypeParameter, this);
057 }
058
059 @NotNull
060 @Override
061 protected Set<JetType> resolveUpperBounds() {
062 Set<JetType> upperBounds = Sets.newLinkedHashSet();
063
064 JetTypeParameter jetTypeParameter = this.jetTypeParameter;
065
066 JetTypeReference extendsBound = jetTypeParameter.getExtendsBound();
067 if (extendsBound != null) {
068 JetType boundType = c.getDescriptorResolver().resolveTypeParameterExtendsBound(
069 this, extendsBound, getContainingDeclaration().getScopeForClassHeaderResolution(), c.getTrace());
070 upperBounds.add(boundType);
071 }
072
073 resolveUpperBoundsFromWhereClause(upperBounds);
074
075 if (upperBounds.isEmpty()) {
076 upperBounds.add(c.getModuleDescriptor().getBuiltIns().getDefaultBound());
077 }
078
079 return upperBounds;
080 }
081
082 private void resolveUpperBoundsFromWhereClause(Set<JetType> upperBounds) {
083 JetClassOrObject classOrObject = JetStubbedPsiUtil.getPsiOrStubParent(jetTypeParameter, JetClassOrObject.class, true);
084 if (classOrObject instanceof JetClass) {
085 JetClass jetClass = (JetClass) classOrObject;
086 for (JetTypeConstraint jetTypeConstraint : jetClass.getTypeConstraints()) {
087 JetSimpleNameExpression constrainedParameterName = jetTypeConstraint.getSubjectTypeParameterName();
088 if (constrainedParameterName != null) {
089 if (getName().equals(constrainedParameterName.getReferencedNameAsName())) {
090 c.getTrace().record(BindingContext.REFERENCE_TARGET, constrainedParameterName, this);
091
092 JetTypeReference boundTypeReference = jetTypeConstraint.getBoundTypeReference();
093 if (boundTypeReference != null) {
094 JetType boundType = resolveBoundType(boundTypeReference);
095 upperBounds.add(boundType);
096 }
097 }
098 }
099 }
100 }
101
102 }
103
104 private JetType resolveBoundType(@NotNull JetTypeReference boundTypeReference) {
105 return c.getTypeResolver()
106 .resolveType(getContainingDeclaration().getScopeForClassHeaderResolution(), boundTypeReference,
107 c.getTrace(), false);
108 }
109
110 @NotNull
111 @Override
112 public LazyClassDescriptor getContainingDeclaration() {
113 return (LazyClassDescriptor) super.getContainingDeclaration();
114 }
115
116 @Override
117 public void forceResolveAllContents() {
118 ForceResolveUtil.forceResolveAllContents(getAnnotations());
119 getContainingDeclaration();
120 getDefaultType();
121 getIndex();
122 ForceResolveUtil.forceResolveAllContents(getLowerBounds());
123 getOriginal();
124 ForceResolveUtil.forceResolveAllContents(getTypeConstructor());
125 ForceResolveUtil.forceResolveAllContents(getUpperBounds());
126 getUpperBoundsAsType();
127 getVariance();
128 }
129 }