001 /*
002 * Copyright 2010-2014 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.jet.lang.resolve.lazy.descriptors;
018
019 import com.google.common.collect.Sets;
020 import org.jetbrains.annotations.NotNull;
021 import org.jetbrains.jet.lang.descriptors.impl.AbstractLazyTypeParameterDescriptor;
022 import org.jetbrains.jet.lang.psi.*;
023 import org.jetbrains.jet.lang.resolve.BindingContext;
024 import org.jetbrains.jet.lang.resolve.DescriptorResolver;
025 import org.jetbrains.jet.lang.resolve.lazy.ForceResolveUtil;
026 import org.jetbrains.jet.lang.resolve.lazy.LazyEntity;
027 import org.jetbrains.jet.lang.resolve.lazy.ResolveSession;
028 import org.jetbrains.jet.lang.types.JetType;
029 import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns;
030 import org.jetbrains.jet.lexer.JetTokens;
031
032 import java.util.Set;
033
034 import static org.jetbrains.jet.lang.resolve.source.SourcePackage.toSourceElement;
035
036 public class LazyTypeParameterDescriptor extends AbstractLazyTypeParameterDescriptor implements LazyEntity {
037 private final ResolveSession resolveSession;
038
039 private final JetTypeParameter jetTypeParameter;
040
041 public LazyTypeParameterDescriptor(
042 @NotNull ResolveSession resolveSession,
043 @NotNull LazyClassDescriptor containingDeclaration,
044 @NotNull JetTypeParameter jetTypeParameter,
045 int index) {
046 super(
047 resolveSession.getStorageManager(),
048 containingDeclaration,
049 jetTypeParameter.getNameAsSafeName(),
050 jetTypeParameter.getVariance(),
051 jetTypeParameter.hasModifier(JetTokens.REIFIED_KEYWORD),
052 index,
053 toSourceElement(jetTypeParameter)
054 );
055 this.resolveSession = resolveSession;
056 this.jetTypeParameter = jetTypeParameter;
057
058 this.resolveSession.getTrace().record(BindingContext.TYPE_PARAMETER, jetTypeParameter, this);
059 }
060
061 @NotNull
062 @Override
063 protected Set<JetType> resolveUpperBounds() {
064 Set<JetType> upperBounds = Sets.newLinkedHashSet();
065
066 JetTypeParameter jetTypeParameter = this.jetTypeParameter;
067
068 resolveUpperBoundsFromWhereClause(upperBounds);
069
070 JetTypeReference extendsBound = jetTypeParameter.getExtendsBound();
071 if (extendsBound != null) {
072 upperBounds.add(resolveBoundType(extendsBound));
073 }
074
075 if (upperBounds.isEmpty()) {
076 upperBounds.add(KotlinBuiltIns.getInstance().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 DescriptorResolver.reportUnsupportedClassObjectConstraint(resolveSession.getTrace(), jetTypeConstraint);
088
089 JetSimpleNameExpression constrainedParameterName = jetTypeConstraint.getSubjectTypeParameterName();
090 if (constrainedParameterName != null) {
091 if (getName().equals(constrainedParameterName.getReferencedNameAsName())) {
092 resolveSession.getTrace().record(BindingContext.REFERENCE_TARGET, constrainedParameterName, this);
093
094 JetTypeReference boundTypeReference = jetTypeConstraint.getBoundTypeReference();
095 if (boundTypeReference != null) {
096 JetType boundType = resolveBoundType(boundTypeReference);
097 if (!jetTypeConstraint.isClassObjectConstraint()) {
098 upperBounds.add(boundType);
099 }
100 }
101 }
102 }
103 }
104 }
105
106 }
107
108 private JetType resolveBoundType(@NotNull JetTypeReference boundTypeReference) {
109 return resolveSession.getTypeResolver()
110 .resolveType(getContainingDeclaration().getScopeForClassHeaderResolution(), boundTypeReference,
111 resolveSession.getTrace(), false);
112 }
113
114 @NotNull
115 @Override
116 public LazyClassDescriptor getContainingDeclaration() {
117 return (LazyClassDescriptor) super.getContainingDeclaration();
118 }
119
120 @Override
121 public void forceResolveAllContents() {
122 ForceResolveUtil.forceResolveAllContents(getAnnotations());
123 ForceResolveUtil.forceResolveAllContents(getClassObjectType());
124 getContainingDeclaration();
125 getDefaultType();
126 getIndex();
127 ForceResolveUtil.forceResolveAllContents(getLowerBounds());
128 getOriginal();
129 ForceResolveUtil.forceResolveAllContents(getTypeConstructor());
130 ForceResolveUtil.forceResolveAllContents(getUpperBounds());
131 getUpperBoundsAsType();
132 getVariance();
133 }
134 }