001 /*
002 * Copyright 2010-2013 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 com.intellij.psi.util.PsiTreeUtil;
021 import org.jetbrains.annotations.NotNull;
022 import org.jetbrains.jet.lang.descriptors.TypeParameterDescriptor;
023 import org.jetbrains.jet.lang.psi.*;
024 import org.jetbrains.jet.lang.resolve.BindingContext;
025 import org.jetbrains.jet.lang.resolve.lazy.LazyDescriptor;
026 import org.jetbrains.jet.lang.resolve.lazy.ResolveSession;
027 import org.jetbrains.jet.lang.resolve.lazy.ResolveSessionUtils;
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 public class LazyTypeParameterDescriptor extends AbstractLazyTypeParameterDescriptor implements TypeParameterDescriptor, LazyDescriptor {
035 private final ResolveSession resolveSession;
036
037 private final JetTypeParameter jetTypeParameter;
038
039 public LazyTypeParameterDescriptor(
040 @NotNull ResolveSession resolveSession,
041 @NotNull LazyClassDescriptor containingDeclaration,
042 @NotNull JetTypeParameter jetTypeParameter,
043 int index) {
044 super(
045 resolveSession.getStorageManager(),
046 containingDeclaration,
047 ResolveSessionUtils.safeNameForLazyResolve(jetTypeParameter.getNameAsName()),
048 jetTypeParameter.getVariance(),
049 jetTypeParameter.hasModifier(JetTokens.REIFIED_KEYWORD),
050 index
051 );
052 this.resolveSession = resolveSession;
053 this.jetTypeParameter = jetTypeParameter;
054
055 this.resolveSession.getTrace().record(BindingContext.TYPE_PARAMETER, jetTypeParameter, this);
056 }
057
058 @NotNull
059 @Override
060 protected Set<JetType> resolveUpperBounds() {
061 Set<JetType> upperBounds = Sets.newLinkedHashSet();
062
063 JetTypeParameter jetTypeParameter = this.jetTypeParameter;
064
065 resolveUpperBoundsFromWhereClause(upperBounds, false);
066
067 JetTypeReference extendsBound = jetTypeParameter.getExtendsBound();
068 if (extendsBound != null) {
069 upperBounds.add(resolveBoundType(extendsBound));
070 }
071
072 if (upperBounds.isEmpty()) {
073 upperBounds.add(KotlinBuiltIns.getInstance().getDefaultBound());
074 }
075
076 return upperBounds;
077 }
078
079 private void resolveUpperBoundsFromWhereClause(Set<JetType> upperBounds, boolean forClassObject) {
080 JetClassOrObject classOrObject = PsiTreeUtil.getParentOfType(jetTypeParameter, JetClassOrObject.class);
081 if (classOrObject instanceof JetClass) {
082 JetClass jetClass = (JetClass) classOrObject;
083 for (JetTypeConstraint jetTypeConstraint : jetClass.getTypeConstraints()) {
084 if (jetTypeConstraint.isClassObjectContraint() != forClassObject) continue;
085
086 JetSimpleNameExpression constrainedParameterName = jetTypeConstraint.getSubjectTypeParameterName();
087 if (constrainedParameterName != null) {
088 if (getName().equals(constrainedParameterName.getReferencedNameAsName())) {
089
090 JetTypeReference boundTypeReference = jetTypeConstraint.getBoundTypeReference();
091 if (boundTypeReference != null) {
092 upperBounds.add(resolveBoundType(boundTypeReference));
093 }
094 }
095 }
096 }
097 }
098
099 }
100
101 private JetType resolveBoundType(@NotNull JetTypeReference boundTypeReference) {
102 return resolveSession.getInjector().getTypeResolver()
103 .resolveType(getContainingDeclaration().getScopeForClassHeaderResolution(), boundTypeReference,
104 resolveSession.getTrace(), false);
105 }
106
107 @NotNull
108 @Override
109 public LazyClassDescriptor getContainingDeclaration() {
110 return (LazyClassDescriptor) super.getContainingDeclaration();
111 }
112
113 @Override
114 public void forceResolveAllContents() {
115 getAnnotations();
116 getClassObjectType();
117 getContainingDeclaration();
118 getDefaultType();
119 getIndex();
120 getLowerBounds();
121 getLowerBoundsAsType();
122 getOriginal();
123 getTypeConstructor();
124 getUpperBounds();
125 getUpperBoundsAsType();
126 getVariance();
127 }
128 }