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.descriptors.impl;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.annotations.Nullable;
021    import org.jetbrains.kotlin.descriptors.*;
022    import org.jetbrains.kotlin.descriptors.annotations.Annotations;
023    import org.jetbrains.kotlin.name.Name;
024    import org.jetbrains.kotlin.resolve.constants.CompileTimeConstant;
025    import org.jetbrains.kotlin.storage.NullableLazyValue;
026    import org.jetbrains.kotlin.types.JetType;
027    import org.jetbrains.kotlin.types.LazyType;
028    
029    import java.util.Collections;
030    import java.util.List;
031    import java.util.Set;
032    
033    public abstract class VariableDescriptorImpl extends DeclarationDescriptorNonRootImpl implements VariableDescriptor {
034        private JetType outType;
035        private NullableLazyValue<CompileTimeConstant<?>> compileTimeInitializer;
036    
037        public VariableDescriptorImpl(
038                @NotNull DeclarationDescriptor containingDeclaration,
039                @NotNull Annotations annotations,
040                @NotNull Name name,
041                @Nullable JetType outType,
042                @NotNull SourceElement source
043        ) {
044            super(containingDeclaration, annotations, name, source);
045    
046            this.outType = outType;
047        }
048    
049        @NotNull
050        @Override
051        public JetType getType() {
052            return outType;
053        }
054    
055        public void setOutType(JetType outType) {
056            assert this.outType == null;
057            this.outType = outType;
058        }
059    
060        @Nullable
061        @Override
062        public CompileTimeConstant<?> getCompileTimeInitializer() {
063            // Force computation and setting of compileTimeInitializer, if needed
064            if (compileTimeInitializer == null && outType instanceof LazyType) {
065                outType.getConstructor();
066            }
067    
068            if (compileTimeInitializer != null) {
069                return compileTimeInitializer.invoke();
070            }
071            return null;
072        }
073    
074        public void setCompileTimeInitializer(@NotNull NullableLazyValue<CompileTimeConstant<?>> compileTimeInitializer) {
075            assert !isVar() : "Compile-time value for property initializer should be recorded only for final variables " + getName();
076            this.compileTimeInitializer = compileTimeInitializer;
077        }
078    
079        @Override
080        @NotNull
081        public VariableDescriptor getOriginal() {
082            return (VariableDescriptor) super.getOriginal();
083        }
084    
085        @NotNull
086        @Override
087        public List<ValueParameterDescriptor> getValueParameters() {
088            return Collections.emptyList();
089        }
090    
091        @Override
092        public boolean hasStableParameterNames() {
093            return false;
094        }
095    
096        @Override
097        public boolean hasSynthesizedParameterNames() {
098            return false;
099        }
100    
101        @NotNull
102        @Override
103        public Set<? extends CallableDescriptor> getOverriddenDescriptors() {
104            return Collections.emptySet();
105        }
106    
107        @NotNull
108        @Override
109        public List<TypeParameterDescriptor> getTypeParameters() {
110            return Collections.emptyList();
111        }
112    
113        @Override
114        public ReceiverParameterDescriptor getExtensionReceiverParameter() {
115            return ReceiverParameterDescriptor.NO_RECEIVER_PARAMETER;
116        }
117    
118        @Override
119        public ReceiverParameterDescriptor getDispatchReceiverParameter() {
120            return ReceiverParameterDescriptor.NO_RECEIVER_PARAMETER;
121        }
122    
123        @NotNull
124        @Override
125        public JetType getReturnType() {
126            return getType();
127        }
128    }