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.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.AnnotationDescriptor;
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
039 public abstract class ClassBodyCodegen extends MemberCodegen {
040 protected final JetClassOrObject myClass;
041 protected final OwnerKind kind;
042 protected final ClassDescriptor descriptor;
043 protected final ClassBuilder v;
044 protected final ClassContext context;
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);
058 descriptor = state.getBindingContext().get(BindingContext.CLASS, aClass);
059 myClass = aClass;
060 this.context = context;
061 this.kind = context.getContextKind();
062 this.v = v;
063 }
064
065 public void generate() {
066 generateDeclaration();
067
068 generateClassBody();
069
070 generateSyntheticParts();
071
072 generateStaticInitializer();
073
074 generateKotlinAnnotation();
075 }
076
077 protected abstract void generateDeclaration();
078
079 protected void generateKotlinAnnotation() {
080 }
081
082 protected void generateSyntheticParts() {
083 }
084
085 private void generateClassBody() {
086 FunctionCodegen functionCodegen = new FunctionCodegen(context, v, state);
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 boolean shouldProcessFirst(JetDeclaration declaration) {
108 return false == (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(
118 state.getBindingContext(), (JetEnumEntry) declaration)) {
119 return;
120 }
121
122 genClassOrObject(context, (JetClassOrObject) declaration);
123 }
124 else if (declaration instanceof JetClassObject) {
125 genClassOrObject(context, ((JetClassObject) declaration).getObjectDeclaration());
126 }
127 }
128
129 private void generatePrimaryConstructorProperties(PropertyCodegen propertyCodegen, JetClassOrObject origin) {
130 boolean isAnnotation = origin instanceof JetClass && ((JetClass) origin).isAnnotation();
131 for (JetParameter p : getPrimaryConstructorParameters()) {
132 if (p.getValOrVarNode() != null) {
133 PropertyDescriptor propertyDescriptor = state.getBindingContext().get(BindingContext.PRIMARY_CONSTRUCTOR_PARAMETER, p);
134 if (propertyDescriptor != null) {
135 if (!isAnnotation) {
136 propertyCodegen.generatePrimaryConstructorProperty(p, propertyDescriptor);
137 }
138 else {
139 propertyCodegen.generateConstructorPropertyAsMethodForAnnotationClass(p, propertyDescriptor);
140 }
141 }
142 }
143 }
144 }
145
146 protected @NotNull List<JetParameter> getPrimaryConstructorParameters() {
147 if (myClass instanceof JetClass) {
148 return ((JetClass) myClass).getPrimaryConstructorParameters();
149 }
150 return Collections.emptyList();
151 }
152
153 private void generateStaticInitializer() {
154 if (clInitMethod != null) {
155 createOrGetClInitMethod();
156
157 if (state.getClassBuilderMode() == ClassBuilderMode.FULL) {
158 ExpressionCodegen codegen = createOrGetClInitCodegen();
159
160 createOrGetClInitMethod().visitInsn(RETURN);
161 FunctionCodegen.endVisit(codegen.v, "static initializer", myClass);
162 }
163 }
164 }
165
166 @Nullable
167 protected MethodVisitor createOrGetClInitMethod() {
168 if (clInitMethod == null) {
169 clInitMethod = v.newMethod(null, ACC_STATIC, "<clinit>", "()V", null, null);
170 }
171 return clInitMethod;
172 }
173
174 @Nullable
175 protected ExpressionCodegen createOrGetClInitCodegen() {
176 assert state.getClassBuilderMode() == ClassBuilderMode.FULL;
177 if (state.getClassBuilderMode() == ClassBuilderMode.FULL) {
178 if (clInitCodegen == null) {
179 MethodVisitor method = createOrGetClInitMethod();
180 method.visitCode();
181 SimpleFunctionDescriptorImpl clInit =
182 new SimpleFunctionDescriptorImpl(descriptor, Collections.<AnnotationDescriptor>emptyList(),
183 Name.special("<clinit>"),
184 CallableMemberDescriptor.Kind.SYNTHESIZED);
185 clInit.initialize(null, null, Collections.<TypeParameterDescriptor>emptyList(),
186 Collections.<ValueParameterDescriptor>emptyList(), null, null, Visibilities.PRIVATE, false);
187
188 clInitCodegen = new ExpressionCodegen(method, new FrameMap(), Type.VOID_TYPE, context.intoFunction(clInit), state);
189 }
190 }
191 return clInitCodegen;
192 }
193 }