001    /*
002     * Copyright 2010-2016 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.PropertyDescriptor;
023    import org.jetbrains.kotlin.js.translate.context.Namer;
024    import org.jetbrains.kotlin.js.translate.context.TranslationContext;
025    import org.jetbrains.kotlin.js.translate.general.Translation;
026    import org.jetbrains.kotlin.js.translate.utils.JsAstUtils;
027    import org.jetbrains.kotlin.psi.KtExpression;
028    import org.jetbrains.kotlin.psi.KtProperty;
029    
030    import static org.jetbrains.kotlin.js.translate.utils.TranslationUtils.assignmentToBackingField;
031    
032    public final class InitializerUtils {
033        private InitializerUtils() {
034        }
035    
036        @NotNull
037        public static JsStatement generateInitializerForProperty(@NotNull TranslationContext context,
038                @NotNull PropertyDescriptor descriptor,
039                @NotNull JsExpression value) {
040            return assignmentToBackingField(context, descriptor, value).makeStmt();
041        }
042    
043        @Nullable
044        public static JsStatement generateInitializerForDelegate(@NotNull TranslationContext context, @NotNull KtProperty property) {
045            KtExpression delegate = property.getDelegateExpression();
046            if (delegate != null) {
047                JsExpression value = Translation.translateAsExpression(delegate, context);
048                String name = property.getName();
049                assert name != null: "Delegate property must have name";
050                return JsAstUtils.defineSimpleProperty(Namer.getDelegateName(name), value);
051            }
052            return null;
053        }
054    }