001 /*
002 * Copyright 2010-2014 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.jet.codegen;
018
019 import org.jetbrains.annotations.NotNull;
020 import org.jetbrains.annotations.Nullable;
021 import org.jetbrains.asm4.MethodVisitor;
022 import org.jetbrains.asm4.Type;
023 import org.jetbrains.jet.codegen.context.ClassContext;
024 import org.jetbrains.jet.codegen.state.GenerationState;
025 import org.jetbrains.jet.lang.descriptors.*;
026 import org.jetbrains.jet.lang.descriptors.annotations.Annotations;
027 import org.jetbrains.jet.lang.descriptors.impl.SimpleFunctionDescriptorImpl;
028 import org.jetbrains.jet.lang.psi.*;
029 import org.jetbrains.jet.lang.resolve.BindingContext;
030 import org.jetbrains.jet.lang.resolve.name.Name;
031
032 import java.util.Collections;
033 import java.util.List;
034
035 import static org.jetbrains.asm4.Opcodes.ACC_STATIC;
036 import static org.jetbrains.asm4.Opcodes.RETURN;
037 import static org.jetbrains.jet.codegen.binding.CodegenBinding.enumEntryNeedSubclass;
038 import static org.jetbrains.jet.lang.resolve.DescriptorUtils.isTopLevelOrInnerClass;
039
040 public abstract class ClassBodyCodegen extends MemberCodegen {
041 protected final JetClassOrObject myClass;
042 protected final OwnerKind kind;
043 protected final ClassDescriptor descriptor;
044 protected final ClassBuilder v;
045
046 private MethodVisitor clInitMethod;
047
048 private ExpressionCodegen clInitCodegen;
049
050 protected ClassBodyCodegen(
051 @NotNull JetClassOrObject aClass,
052 @NotNull ClassContext context,
053 @NotNull ClassBuilder v,
054 @NotNull GenerationState state,
055 @Nullable MemberCodegen parentCodegen
056 ) {
057 super(state, parentCodegen, context, v);
058 descriptor = state.getBindingContext().get(BindingContext.CLASS, aClass);
059 myClass = aClass;
060 this.kind = context.getContextKind();
061 this.v = v;
062 }
063
064 public void generate() {
065 generateDeclaration();
066
067 generateClassBody();
068
069 generateSyntheticParts();
070
071 generateStaticInitializer();
072
073 if (state.getClassBuilderMode() == ClassBuilderMode.FULL && isTopLevelOrInnerClass(descriptor)) {
074 generateKotlinAnnotation();
075 }
076 }
077
078 protected abstract void generateDeclaration();
079
080 protected abstract void generateKotlinAnnotation();
081
082 protected void generateSyntheticParts() {
083 }
084
085 private void generateClassBody() {
086 FunctionCodegen functionCodegen = new FunctionCodegen(context, v, state, this);
087 PropertyCodegen propertyCodegen = new PropertyCodegen(context, v, functionCodegen, this);
088
089 if (kind != OwnerKind.TRAIT_IMPL) {
090 //generate nested classes first and only then generate class body. It necessary to access to nested CodegenContexts
091 for (JetDeclaration declaration : myClass.getDeclarations()) {
092 if (shouldProcessFirst(declaration)) {
093 generateDeclaration(propertyCodegen, declaration);
094 }
095 }
096 }
097
098 for (JetDeclaration declaration : myClass.getDeclarations()) {
099 if (!shouldProcessFirst(declaration)) {
100 generateDeclaration(propertyCodegen, declaration);
101 }
102 }
103
104 generatePrimaryConstructorProperties(propertyCodegen, myClass);
105 }
106
107 private static boolean shouldProcessFirst(JetDeclaration declaration) {
108 return !(declaration instanceof JetProperty || declaration instanceof JetNamedFunction);
109 }
110
111
112 protected void generateDeclaration(PropertyCodegen propertyCodegen, JetDeclaration declaration) {
113 if (declaration instanceof JetProperty || declaration instanceof JetNamedFunction) {
114 genFunctionOrProperty(context, (JetTypeParameterListOwner) declaration, v);
115 }
116 else if (declaration instanceof JetClassOrObject) {
117 if (declaration instanceof JetEnumEntry && !enumEntryNeedSubclass(state.getBindingContext(), (JetEnumEntry) declaration)) {
118 return;
119 }
120
121 genClassOrObject(context, (JetClassOrObject) declaration);
122 }
123 else if (declaration instanceof JetClassObject) {
124 genClassOrObject(context, ((JetClassObject) declaration).getObjectDeclaration());
125 }
126 }
127
128 private void generatePrimaryConstructorProperties(PropertyCodegen propertyCodegen, JetClassOrObject origin) {
129 boolean isAnnotation = origin instanceof JetClass && ((JetClass) origin).isAnnotation();
130 for (JetParameter p : getPrimaryConstructorParameters()) {
131 if (p.getValOrVarNode() != null) {
132 PropertyDescriptor propertyDescriptor = state.getBindingContext().get(BindingContext.PRIMARY_CONSTRUCTOR_PARAMETER, p);
133 if (propertyDescriptor != null) {
134 if (!isAnnotation) {
135 propertyCodegen.generatePrimaryConstructorProperty(p, propertyDescriptor);
136 }
137 else {
138 propertyCodegen.generateConstructorPropertyAsMethodForAnnotationClass(p, propertyDescriptor);
139 }
140 }
141 }
142 }
143 }
144
145 protected @NotNull List<JetParameter> getPrimaryConstructorParameters() {
146 if (myClass instanceof JetClass) {
147 return ((JetClass) myClass).getPrimaryConstructorParameters();
148 }
149 return Collections.emptyList();
150 }
151
152 private void generateStaticInitializer() {
153 if (clInitMethod != null) {
154 createOrGetClInitMethod();
155
156 if (state.getClassBuilderMode() == ClassBuilderMode.FULL) {
157 ExpressionCodegen codegen = createOrGetClInitCodegen();
158
159 createOrGetClInitMethod().visitInsn(RETURN);
160 FunctionCodegen.endVisit(codegen.v, "static initializer", myClass);
161 }
162 }
163 }
164
165 @NotNull
166 protected MethodVisitor createOrGetClInitMethod() {
167 if (clInitMethod == null) {
168 clInitMethod = v.newMethod(null, ACC_STATIC, "<clinit>", "()V", null, null);
169 }
170 return clInitMethod;
171 }
172
173 @NotNull
174 protected ExpressionCodegen createOrGetClInitCodegen() {
175 assert state.getClassBuilderMode() == ClassBuilderMode.FULL;
176 if (clInitCodegen == null) {
177 MethodVisitor method = createOrGetClInitMethod();
178 method.visitCode();
179 SimpleFunctionDescriptorImpl clInit =
180 new SimpleFunctionDescriptorImpl(descriptor, Annotations.EMPTY,
181 Name.special("<clinit>"),
182 CallableMemberDescriptor.Kind.SYNTHESIZED);
183 clInit.initialize(null, null, Collections.<TypeParameterDescriptor>emptyList(),
184 Collections.<ValueParameterDescriptor>emptyList(), null, null, Visibilities.PRIVATE);
185
186 clInitCodegen = new ExpressionCodegen(method, new FrameMap(), Type.VOID_TYPE, context.intoFunction(clInit), state, this);
187 }
188 return clInitCodegen;
189 }
190 }