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.initializer;
018
019 import com.google.dart.compiler.backend.js.ast.*;
020 import com.intellij.util.SmartList;
021 import org.jetbrains.annotations.NotNull;
022 import org.jetbrains.annotations.Nullable;
023 import org.jetbrains.jet.lang.descriptors.ConstructorDescriptor;
024 import org.jetbrains.jet.lang.descriptors.DeclarationDescriptor;
025 import org.jetbrains.jet.lang.descriptors.PropertyDescriptor;
026 import org.jetbrains.jet.lang.psi.JetClassOrObject;
027 import org.jetbrains.jet.lang.psi.JetDelegationSpecifier;
028 import org.jetbrains.jet.lang.psi.JetDelegatorToSuperCall;
029 import org.jetbrains.jet.lang.psi.JetParameter;
030 import org.jetbrains.jet.lang.types.JetType;
031 import org.jetbrains.jet.lexer.JetTokens;
032 import org.jetbrains.k2js.translate.context.Namer;
033 import org.jetbrains.k2js.translate.context.TranslationContext;
034 import org.jetbrains.k2js.translate.general.AbstractTranslator;
035
036 import java.util.ArrayList;
037 import java.util.Collections;
038 import java.util.List;
039
040 import static org.jetbrains.jet.lang.resolve.DescriptorUtils.getClassDescriptorForType;
041 import static org.jetbrains.k2js.translate.utils.BindingUtils.*;
042 import static org.jetbrains.k2js.translate.utils.JsAstUtils.convertToStatement;
043 import static org.jetbrains.k2js.translate.utils.PsiUtils.getPrimaryConstructorParameters;
044 import static org.jetbrains.k2js.translate.utils.TranslationUtils.translateArgumentList;
045
046 public final class ClassInitializerTranslator extends AbstractTranslator {
047 @NotNull
048 private final JetClassOrObject classDeclaration;
049 @NotNull
050 private final List<JsStatement> initializerStatements = new SmartList<JsStatement>();
051
052 public ClassInitializerTranslator(@NotNull JetClassOrObject classDeclaration, @NotNull TranslationContext context) {
053 // Note: it's important we use scope for class descriptor because anonymous function used in property initializers
054 // belong to the properties themselves
055 super(context.newDeclaration(getConstructor(context.bindingContext(), classDeclaration)));
056 this.classDeclaration = classDeclaration;
057 }
058
059 @NotNull
060 public JsFunction generateInitializeMethod() {
061 //TODO: it's inconsistent that we have scope for class and function for constructor, currently have problems implementing better way
062 ConstructorDescriptor primaryConstructor = getConstructor(bindingContext(), classDeclaration);
063 JsFunction result = context().getFunctionObject(primaryConstructor);
064 //NOTE: while we translate constructor parameters we also add property initializer statements
065 // for properties declared as constructor parameters
066 result.getParameters().addAll(translatePrimaryConstructorParameters());
067 mayBeAddCallToSuperMethod(result);
068 new InitializerVisitor(initializerStatements).traverseContainer(classDeclaration, context());
069
070 for (JsStatement statement : initializerStatements) {
071 if (statement instanceof JsBlock) {
072 result.getBody().getStatements().addAll(((JsBlock) statement).getStatements());
073 }
074 else {
075 result.getBody().getStatements().add(statement);
076 }
077 }
078
079 return result;
080 }
081
082 @NotNull
083 public JsExpression generateEnumEntryInstanceCreation(@NotNull JetType enumClassType) {
084 JetDelegatorToSuperCall superCall = getSuperCall();
085 List<JsExpression> arguments;
086 if (superCall != null) {
087 arguments = translateArguments(superCall);
088 } else {
089 arguments = Collections.emptyList();
090 }
091 JsNameRef reference = context().getQualifiedReference(getClassDescriptorForType(enumClassType));
092 if(context().isEcma5()) {
093 return new JsInvocation(reference, arguments);
094 } else {
095 return new JsNew(reference, arguments);
096 }
097 }
098
099 private void mayBeAddCallToSuperMethod(JsFunction initializer) {
100 if (classDeclaration.hasModifier(JetTokens.ENUM_KEYWORD)) {
101 addCallToSuperMethod(Collections.<JsExpression>emptyList(), initializer);
102 return;
103 }
104 if (hasAncestorClass(bindingContext(), classDeclaration)) {
105 JetDelegatorToSuperCall superCall = getSuperCall();
106 if (superCall == null) {
107 return;
108 }
109 addCallToSuperMethod(translateArguments(superCall), initializer);
110 }
111 }
112
113 private void addCallToSuperMethod(@NotNull List<JsExpression> arguments, JsFunction initializer) {
114 if (context().isEcma5()) {
115 JsName ref = context().scope().declareName(Namer.CALLEE_NAME);
116 initializer.setName(ref);
117 JsInvocation call = new JsInvocation(new JsNameRef("call", new JsNameRef("baseInitializer", ref.makeRef())));
118 call.getArguments().add(JsLiteral.THIS);
119 call.getArguments().addAll(arguments);
120 initializerStatements.add(call.makeStmt());
121 }
122 else {
123 JsName superMethodName = context().scope().declareName(Namer.superMethodName());
124 initializerStatements.add(convertToStatement(new JsInvocation(new JsNameRef(superMethodName, JsLiteral.THIS), arguments)));
125 }
126 }
127
128 @NotNull
129 private List<JsExpression> translateArguments(@NotNull JetDelegatorToSuperCall superCall) {
130 return translateArgumentList(context(), superCall.getValueArguments());
131 }
132
133 @Nullable
134 private JetDelegatorToSuperCall getSuperCall() {
135 JetDelegatorToSuperCall result = null;
136 for (JetDelegationSpecifier specifier : classDeclaration.getDelegationSpecifiers()) {
137 if (specifier instanceof JetDelegatorToSuperCall) {
138 result = (JetDelegatorToSuperCall) specifier;
139 }
140 }
141 return result;
142 }
143
144 @NotNull
145 List<JsParameter> translatePrimaryConstructorParameters() {
146 List<JetParameter> parameterList = getPrimaryConstructorParameters(classDeclaration);
147 List<JsParameter> result = new ArrayList<JsParameter>();
148 for (JetParameter jetParameter : parameterList) {
149 result.add(translateParameter(jetParameter));
150 }
151 return result;
152 }
153
154 @NotNull
155 private JsParameter translateParameter(@NotNull JetParameter jetParameter) {
156 DeclarationDescriptor parameterDescriptor =
157 getDescriptorForElement(bindingContext(), jetParameter);
158 JsName parameterName = context().getNameForDescriptor(parameterDescriptor);
159 JsParameter jsParameter = new JsParameter(parameterName);
160 mayBeAddInitializerStatementForProperty(jsParameter, jetParameter);
161 return jsParameter;
162 }
163
164 private void mayBeAddInitializerStatementForProperty(@NotNull JsParameter jsParameter,
165 @NotNull JetParameter jetParameter) {
166 PropertyDescriptor propertyDescriptor =
167 getPropertyDescriptorForConstructorParameter(bindingContext(), jetParameter);
168 if (propertyDescriptor == null) {
169 return;
170 }
171 JsNameRef initialValueForProperty = jsParameter.getName().makeRef();
172 addInitializerOrPropertyDefinition(initialValueForProperty, propertyDescriptor);
173 }
174
175 private void addInitializerOrPropertyDefinition(@NotNull JsNameRef initialValue, @NotNull PropertyDescriptor propertyDescriptor) {
176 initializerStatements.add(InitializerUtils.generateInitializerForProperty(context(), propertyDescriptor, initialValue));
177 }
178 }