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.js.translate.reference;
018    
019    import com.google.dart.compiler.backend.js.ast.JsExpression;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.kotlin.descriptors.DeclarationDescriptor;
022    import org.jetbrains.kotlin.descriptors.PropertyDescriptor;
023    import org.jetbrains.kotlin.js.translate.context.TemporaryVariable;
024    import org.jetbrains.kotlin.js.translate.context.TranslationContext;
025    import org.jetbrains.kotlin.js.translate.general.AbstractTranslator;
026    import org.jetbrains.kotlin.psi.JetSimpleNameExpression;
027    
028    import java.util.Collections;
029    import java.util.List;
030    
031    import static org.jetbrains.kotlin.js.translate.utils.BindingUtils.getDescriptorForReferenceExpression;
032    import static org.jetbrains.kotlin.js.translate.utils.TranslationUtils.assignmentToBackingField;
033    import static org.jetbrains.kotlin.js.translate.utils.TranslationUtils.backingFieldReference;
034    
035    public final class BackingFieldAccessTranslator extends AbstractTranslator implements CachedAccessTranslator {
036    
037        @NotNull
038        private final PropertyDescriptor descriptor;
039    
040        /*package*/
041        public static BackingFieldAccessTranslator newInstance(@NotNull JetSimpleNameExpression expression,
042                                                        @NotNull TranslationContext context) {
043            DeclarationDescriptor referencedProperty = getDescriptorForReferenceExpression(context.bindingContext(), expression);
044            assert referencedProperty instanceof PropertyDescriptor;
045            return new BackingFieldAccessTranslator((PropertyDescriptor) referencedProperty, context);
046        }
047    
048        private BackingFieldAccessTranslator(@NotNull PropertyDescriptor descriptor, @NotNull TranslationContext context) {
049            super(context);
050            this.descriptor = descriptor;
051        }
052    
053        @NotNull
054        @Override
055        public JsExpression translateAsGet() {
056            return backingFieldReference(context(), descriptor);
057        }
058    
059        @NotNull
060        @Override
061        public JsExpression translateAsSet(@NotNull JsExpression setTo) {
062            return assignmentToBackingField(context(), descriptor, setTo);
063        }
064    
065        @NotNull
066        @Override
067        public CachedAccessTranslator getCached() {
068            return this;
069        }
070    
071        @NotNull
072        @Override
073        public List<TemporaryVariable> declaredTemporaries() {
074            return Collections.emptyList();
075        }
076    }