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.js.translate.context.TranslationContext;
022    import org.jetbrains.kotlin.js.translate.general.Translation;
023    import org.jetbrains.kotlin.psi.*;
024    
025    import java.util.LinkedHashMap;
026    import java.util.Map;
027    
028    public final class AccessTranslationUtils {
029        private AccessTranslationUtils() {
030        }
031    
032        @NotNull
033        public static AccessTranslator getAccessTranslator(@NotNull KtExpression referenceExpression,
034                                                           @NotNull TranslationContext context) {
035            return getAccessTranslator(referenceExpression, context, false);
036        }
037    
038        @NotNull
039        public static AccessTranslator getAccessTranslator(@NotNull KtExpression referenceExpression,
040                @NotNull TranslationContext context, boolean forceOrderOfEvaluation) {
041            assert ((referenceExpression instanceof KtReferenceExpression) ||
042                    (referenceExpression instanceof KtQualifiedExpression));
043            if (referenceExpression instanceof KtQualifiedExpression) {
044                return QualifiedExpressionTranslator.getAccessTranslator((KtQualifiedExpression) referenceExpression, context, forceOrderOfEvaluation);
045            }
046            if (referenceExpression instanceof KtSimpleNameExpression) {
047                return ReferenceTranslator.getAccessTranslator((KtSimpleNameExpression) referenceExpression, context);
048            }
049            if (referenceExpression instanceof KtArrayAccessExpression) {
050                return getArrayAccessTranslator((KtArrayAccessExpression) referenceExpression, context, forceOrderOfEvaluation);
051            }
052            return new DefaultAccessTranslator(referenceExpression, context);
053        }
054    
055        @NotNull
056        private static AccessTranslator getArrayAccessTranslator(
057                @NotNull KtArrayAccessExpression expression,
058                @NotNull TranslationContext context,
059                boolean forceOrderOfEvaluation
060        ) {
061            TranslationContext accessArrayContext;
062            if (forceOrderOfEvaluation) {
063                Map<KtExpression, JsExpression> indexesMap = new LinkedHashMap<KtExpression, JsExpression>();
064                for(KtExpression indexExpression : expression.getIndexExpressions()) {
065                    JsExpression jsIndexExpression = context.cacheExpressionIfNeeded(
066                            Translation.translateAsExpression(indexExpression, context));
067                    indexesMap.put(indexExpression, jsIndexExpression);
068                }
069                accessArrayContext = context.innerContextWithAliasesForExpressions(indexesMap);
070            } else {
071                accessArrayContext = context;
072            }
073    
074            return ArrayAccessTranslator.newInstance(expression, accessArrayContext);
075        }
076    
077        @NotNull
078        public static JsExpression translateAsGet(@NotNull KtExpression expression,
079                                                  @NotNull TranslationContext context) {
080            return (getAccessTranslator(expression, context)).translateAsGet();
081        }
082    }