001 /*
002 * Copyright 2010-2013 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.k2js.translate.reference;
018
019 import com.google.dart.compiler.backend.js.ast.JsExpression;
020 import org.jetbrains.annotations.NotNull;
021 import org.jetbrains.annotations.Nullable;
022 import org.jetbrains.jet.lang.descriptors.DeclarationDescriptor;
023 import org.jetbrains.jet.lang.descriptors.NamespaceDescriptor;
024 import org.jetbrains.jet.lang.psi.*;
025 import org.jetbrains.k2js.translate.context.TranslationContext;
026 import org.jetbrains.k2js.translate.utils.ErrorReportingUtils;
027
028 import static org.jetbrains.k2js.translate.general.Translation.translateAsExpression;
029 import static org.jetbrains.k2js.translate.utils.BindingUtils.getDescriptorForReferenceExpression;
030 import static org.jetbrains.k2js.translate.utils.PsiUtils.getNotNullSimpleNameSelector;
031 import static org.jetbrains.k2js.translate.utils.PsiUtils.getSelector;
032
033 public final class QualifiedExpressionTranslator {
034
035 private QualifiedExpressionTranslator() {
036 }
037
038 @NotNull
039 public static AccessTranslator getAccessTranslator(@NotNull JetQualifiedExpression expression,
040 @NotNull TranslationContext context) {
041 JsExpression receiver = translateReceiver(expression, context);
042 PropertyAccessTranslator result =
043 PropertyAccessTranslator.newInstance(getNotNullSimpleNameSelector(expression), receiver,
044 CallType.getCallTypeForQualifiedExpression(expression), context);
045 result.setCallType(CallType.getCallTypeForQualifiedExpression(expression));
046 return result;
047 }
048
049 @NotNull
050 public static JsExpression translateQualifiedExpression(@NotNull JetQualifiedExpression expression,
051 @NotNull TranslationContext context) {
052 JsExpression receiver = translateReceiver(expression, context);
053 JetExpression selector = getSelector(expression);
054 CallType callType = CallType.getCallTypeForQualifiedExpression(expression);
055 return dispatchToCorrectTranslator(receiver, selector, callType, context);
056 }
057
058 @NotNull
059 private static JsExpression dispatchToCorrectTranslator(
060 @Nullable JsExpression receiver,
061 @NotNull JetExpression selector,
062 @NotNull CallType callType,
063 @NotNull TranslationContext context
064 ) {
065 if (PropertyAccessTranslator.canBePropertyGetterCall(selector, context)) {
066 assert selector instanceof JetSimpleNameExpression : "Selectors for properties must be simple names.";
067 return PropertyAccessTranslator.translateAsPropertyGetterCall
068 ((JetSimpleNameExpression)selector, receiver, callType, context);
069 }
070 if (selector instanceof JetCallExpression) {
071 return invokeCallExpressionTranslator(receiver, selector, callType, context);
072 }
073 //TODO: never get there
074 if (selector instanceof JetSimpleNameExpression) {
075 return ReferenceTranslator.translateSimpleName((JetSimpleNameExpression)selector, context);
076 }
077 throw new AssertionError("Unexpected qualified expression: " + selector.getText());
078 }
079
080 @NotNull
081 private static JsExpression invokeCallExpressionTranslator(@Nullable JsExpression receiver,
082 @NotNull JetExpression selector,
083 @NotNull CallType callType,
084 @NotNull TranslationContext context) {
085 try {
086 return CallExpressionTranslator.translate((JetCallExpression) selector, receiver, callType, context);
087 } catch (RuntimeException e) {
088 throw ErrorReportingUtils.reportErrorWithLocation(selector, e);
089 }
090 }
091
092 @Nullable
093 private static JsExpression translateReceiver(@NotNull JetQualifiedExpression expression,
094 @NotNull TranslationContext context) {
095 JetExpression receiverExpression = expression.getReceiverExpression();
096 if (isFullQualifierForExpression(receiverExpression, context)) {
097 return null;
098 }
099 return translateAsExpression(receiverExpression, context);
100 }
101
102 //TODO: prove correctness
103 private static boolean isFullQualifierForExpression(@Nullable JetExpression receiverExpression, @NotNull TranslationContext context) {
104 if (receiverExpression == null) {
105 return false;
106 }
107 if (receiverExpression instanceof JetReferenceExpression) {
108 DeclarationDescriptor descriptorForReferenceExpression =
109 getDescriptorForReferenceExpression(context.bindingContext(), (JetReferenceExpression)receiverExpression);
110 if (descriptorForReferenceExpression instanceof NamespaceDescriptor) {
111 return true;
112 }
113 }
114 if (receiverExpression instanceof JetQualifiedExpression) {
115 return isFullQualifierForExpression(((JetQualifiedExpression)receiverExpression).getSelectorExpression(), context);
116 }
117 return false;
118 }
119 }