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.JsAstUtils.setQualifier;
031 import static org.jetbrains.k2js.translate.utils.PsiUtils.getNotNullSimpleNameSelector;
032 import static org.jetbrains.k2js.translate.utils.PsiUtils.getSelector;
033
034 public final class QualifiedExpressionTranslator {
035
036 private QualifiedExpressionTranslator() {
037 }
038
039 @NotNull
040 public static AccessTranslator getAccessTranslator(@NotNull JetQualifiedExpression expression,
041 @NotNull TranslationContext context) {
042 JsExpression receiver = translateReceiver(expression, context);
043 PropertyAccessTranslator result =
044 PropertyAccessTranslator.newInstance(getNotNullSimpleNameSelector(expression), receiver,
045 CallType.getCallTypeForQualifiedExpression(expression), context);
046 result.setCallType(CallType.getCallTypeForQualifiedExpression(expression));
047 return result;
048 }
049
050 @NotNull
051 public static JsExpression translateQualifiedExpression(@NotNull JetQualifiedExpression expression,
052 @NotNull TranslationContext context) {
053 JsExpression receiver = translateReceiver(expression, context);
054 JetExpression selector = getSelector(expression);
055 CallType callType = CallType.getCallTypeForQualifiedExpression(expression);
056 return dispatchToCorrectTranslator(receiver, selector, callType, context);
057 }
058
059 @NotNull
060 private static JsExpression dispatchToCorrectTranslator(
061 @Nullable JsExpression receiver,
062 @NotNull JetExpression selector,
063 @NotNull CallType callType,
064 @NotNull TranslationContext context
065 ) {
066 if (PropertyAccessTranslator.canBePropertyGetterCall(selector, context)) {
067 assert selector instanceof JetSimpleNameExpression : "Selectors for properties must be simple names.";
068 return PropertyAccessTranslator.translateAsPropertyGetterCall
069 ((JetSimpleNameExpression)selector, receiver, callType, context);
070 }
071 if (selector instanceof JetCallExpression) {
072 return invokeCallExpressionTranslator(receiver, selector, callType, context);
073 }
074 //TODO: never get there
075 if (selector instanceof JetSimpleNameExpression) {
076 JsExpression simpleName = ReferenceTranslator.translateSimpleName((JetSimpleNameExpression) selector, context);
077 if (receiver != null) { // TODO: hack for nested Object
078 setQualifier(simpleName, receiver);
079 }
080 return simpleName;
081 }
082 throw new AssertionError("Unexpected qualified expression: " + selector.getText());
083 }
084
085 @NotNull
086 private static JsExpression invokeCallExpressionTranslator(@Nullable JsExpression receiver,
087 @NotNull JetExpression selector,
088 @NotNull CallType callType,
089 @NotNull TranslationContext context) {
090 try {
091 return CallExpressionTranslator.translate((JetCallExpression) selector, receiver, callType, context);
092 } catch (RuntimeException e) {
093 throw ErrorReportingUtils.reportErrorWithLocation(selector, e);
094 }
095 }
096
097 @Nullable
098 private static JsExpression translateReceiver(@NotNull JetQualifiedExpression expression,
099 @NotNull TranslationContext context) {
100 JetExpression receiverExpression = expression.getReceiverExpression();
101 if (isFullQualifierForExpression(receiverExpression, context)) {
102 return null;
103 }
104 return translateAsExpression(receiverExpression, context);
105 }
106
107 //TODO: prove correctness
108 private static boolean isFullQualifierForExpression(@Nullable JetExpression receiverExpression, @NotNull TranslationContext context) {
109 if (receiverExpression == null) {
110 return false;
111 }
112 if (receiverExpression instanceof JetReferenceExpression) {
113 DeclarationDescriptor descriptorForReferenceExpression =
114 getDescriptorForReferenceExpression(context.bindingContext(), (JetReferenceExpression)receiverExpression);
115 if (descriptorForReferenceExpression instanceof NamespaceDescriptor) {
116 return true;
117 }
118 }
119 if (receiverExpression instanceof JetQualifiedExpression) {
120 return isFullQualifierForExpression(((JetQualifiedExpression)receiverExpression).getSelectorExpression(), context);
121 }
122 return false;
123 }
124 }