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.PropertyDescriptor;
022    import org.jetbrains.kotlin.descriptors.impl.SyntheticFieldDescriptorKt;
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.KtSimpleNameExpression;
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 KtSimpleNameExpression expression,
042                                                        @NotNull TranslationContext context) {
043            PropertyDescriptor referencedProperty = SyntheticFieldDescriptorKt.getReferencedProperty(
044                    getDescriptorForReferenceExpression(context.bindingContext(), expression)
045            );
046            assert referencedProperty != null;
047            return new BackingFieldAccessTranslator(referencedProperty, context);
048        }
049    
050        private BackingFieldAccessTranslator(@NotNull PropertyDescriptor descriptor, @NotNull TranslationContext context) {
051            super(context);
052            this.descriptor = descriptor;
053        }
054    
055        @NotNull
056        @Override
057        public JsExpression translateAsGet() {
058            return backingFieldReference(context(), descriptor);
059        }
060    
061        @NotNull
062        @Override
063        public JsExpression translateAsSet(@NotNull JsExpression setTo) {
064            return assignmentToBackingField(context(), descriptor, setTo);
065        }
066    
067        @NotNull
068        @Override
069        public CachedAccessTranslator getCached() {
070            return this;
071        }
072    
073        @NotNull
074        @Override
075        public List<TemporaryVariable> declaredTemporaries() {
076            return Collections.emptyList();
077        }
078    }