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.initializer;
018    
019    import com.google.dart.compiler.backend.js.ast.*;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.annotations.Nullable;
022    import org.jetbrains.kotlin.descriptors.ClassDescriptor;
023    import org.jetbrains.kotlin.descriptors.PropertyDescriptor;
024    import org.jetbrains.kotlin.js.translate.context.Namer;
025    import org.jetbrains.kotlin.js.translate.context.TranslationContext;
026    import org.jetbrains.kotlin.js.translate.declaration.ClassTranslator;
027    import org.jetbrains.kotlin.js.translate.general.Translation;
028    import org.jetbrains.kotlin.js.translate.utils.JsAstUtils;
029    import org.jetbrains.kotlin.psi.JetExpression;
030    import org.jetbrains.kotlin.psi.JetObjectDeclaration;
031    import org.jetbrains.kotlin.psi.JetProperty;
032    
033    import java.util.List;
034    
035    import static org.jetbrains.kotlin.js.translate.utils.BindingUtils.getClassDescriptor;
036    import static org.jetbrains.kotlin.js.translate.utils.JsAstUtils.assignment;
037    import static org.jetbrains.kotlin.js.translate.utils.TranslationUtils.assignmentToBackingField;
038    
039    public final class InitializerUtils {
040        private InitializerUtils() {
041        }
042    
043        @NotNull
044        public static JsStatement generateInitializerForProperty(@NotNull TranslationContext context,
045                @NotNull PropertyDescriptor descriptor,
046                @NotNull JsExpression value) {
047            return assignmentToBackingField(context, descriptor, value).makeStmt();
048        }
049    
050        @Nullable
051        public static JsStatement generateInitializerForDelegate(@NotNull TranslationContext context, @NotNull JetProperty property) {
052            JetExpression delegate = property.getDelegateExpression();
053            if (delegate != null) {
054                JsExpression value = Translation.translateAsExpression(delegate, context);
055                String name = property.getName();
056                assert name != null: "Delegate property must have name";
057                return JsAstUtils.defineSimpleProperty(Namer.getDelegateName(name), value);
058            }
059            return null;
060        }
061    
062        public static void generateObjectInitializer(
063                @NotNull JetObjectDeclaration declaration,
064                @NotNull List<JsStatement> initializers,
065                @NotNull TranslationContext context
066        ) {
067            JsExpression value = ClassTranslator.generateObjectLiteral(declaration, context);
068            ClassDescriptor descriptor = getClassDescriptor(context.bindingContext(), declaration);
069            JsExpression expression = assignment(new JsNameRef(descriptor.getName().asString(), JsLiteral.THIS), value);
070            initializers.add(expression.makeStmt());
071        }
072    
073        public static JsPropertyInitializer createCompanionObjectInitializer(JsExpression value, TranslationContext context) {
074            JsStringLiteral companionObjectInitStr = context.program().getStringLiteral(Namer.getNameForCompanionObjectInitializer());
075            return new JsPropertyInitializer(companionObjectInitStr, value);
076        }
077    }