001 /*
002 * Copyright 2010-2015 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.kotlin.codegen.inline;
018
019 import org.jetbrains.annotations.NotNull;
020 import org.jetbrains.kotlin.codegen.AsmUtil;
021 import org.jetbrains.kotlin.codegen.StackValue;
022 import org.jetbrains.kotlin.codegen.binding.CalculatedClosure;
023 import org.jetbrains.kotlin.codegen.context.EnclosedValueDescriptor;
024 import org.jetbrains.kotlin.codegen.state.JetTypeMapper;
025 import org.jetbrains.kotlin.descriptors.ClassDescriptor;
026 import org.jetbrains.kotlin.descriptors.FunctionDescriptor;
027 import org.jetbrains.kotlin.psi.KtExpression;
028 import org.jetbrains.kotlin.psi.KtFunctionLiteralExpression;
029 import org.jetbrains.kotlin.resolve.BindingContext;
030 import org.jetbrains.kotlin.resolve.jvm.AsmTypes;
031 import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodSignature;
032 import org.jetbrains.org.objectweb.asm.Type;
033 import org.jetbrains.org.objectweb.asm.tree.FieldInsnNode;
034
035 import java.util.ArrayList;
036 import java.util.Arrays;
037 import java.util.List;
038 import java.util.Set;
039
040 import static org.jetbrains.kotlin.codegen.binding.CodegenBinding.*;
041
042 public class LambdaInfo implements CapturedParamOwner, LabelOwner {
043
044 public final KtExpression expression;
045
046 private final JetTypeMapper typeMapper;
047
048 @NotNull
049 public final Set<String> labels;
050
051 private final CalculatedClosure closure;
052
053 private SMAPAndMethodNode node;
054
055 private List<CapturedParamDesc> capturedVars;
056
057 private final FunctionDescriptor functionDescriptor;
058
059 private final ClassDescriptor classDescriptor;
060
061 private final Type closureClassType;
062
063 LambdaInfo(@NotNull KtExpression expr, @NotNull JetTypeMapper typeMapper) {
064 this.expression = expr instanceof KtFunctionLiteralExpression ?
065 ((KtFunctionLiteralExpression) expr).getFunctionLiteral() : expr;
066
067 this.typeMapper = typeMapper;
068 BindingContext bindingContext = typeMapper.getBindingContext();
069 functionDescriptor = bindingContext.get(BindingContext.FUNCTION, expression);
070 assert functionDescriptor != null : "Function is not resolved to descriptor: " + expression.getText();
071
072 classDescriptor = anonymousClassForCallable(bindingContext, functionDescriptor);
073 closureClassType = asmTypeForAnonymousClass(bindingContext, functionDescriptor);
074
075 closure = bindingContext.get(CLOSURE, classDescriptor);
076 assert closure != null : "Closure for lambda should be not null " + expression.getText();
077
078
079 labels = InlineCodegen.getDeclarationLabels(expr, functionDescriptor);
080 }
081
082 public SMAPAndMethodNode getNode() {
083 return node;
084 }
085
086 public void setNode(SMAPAndMethodNode node) {
087 this.node = node;
088 }
089
090 public FunctionDescriptor getFunctionDescriptor() {
091 return functionDescriptor;
092 }
093
094 public KtExpression getFunctionWithBodyOrCallableReference() {
095 return expression;
096 }
097
098 public ClassDescriptor getClassDescriptor() {
099 return classDescriptor;
100 }
101
102 public Type getLambdaClassType() {
103 return closureClassType;
104 }
105
106 public List<CapturedParamDesc> getCapturedVars() {
107 //lazy initialization cause it would be calculated after object creation
108 if (capturedVars == null) {
109 capturedVars = new ArrayList<CapturedParamDesc>();
110
111 if (closure.getCaptureThis() != null) {
112 Type type = typeMapper.mapType(closure.getCaptureThis());
113 EnclosedValueDescriptor descriptor =
114 new EnclosedValueDescriptor(AsmUtil.CAPTURED_THIS_FIELD,
115 null,
116 StackValue.field(type, closureClassType, AsmUtil.CAPTURED_THIS_FIELD, false,
117 StackValue.LOCAL_0),
118 type);
119 capturedVars.add(getCapturedParamInfo(descriptor));
120 }
121
122 if (closure.getCaptureReceiverType() != null) {
123 Type type = typeMapper.mapType(closure.getCaptureReceiverType());
124 EnclosedValueDescriptor descriptor =
125 new EnclosedValueDescriptor(
126 AsmUtil.CAPTURED_RECEIVER_FIELD,
127 null,
128 StackValue.field(type, closureClassType, AsmUtil.CAPTURED_RECEIVER_FIELD, false,
129 StackValue.LOCAL_0),
130 type);
131 capturedVars.add(getCapturedParamInfo(descriptor));
132 }
133
134 for (EnclosedValueDescriptor descriptor : closure.getCaptureVariables().values()) {
135 capturedVars.add(getCapturedParamInfo(descriptor));
136 }
137 }
138 return capturedVars;
139 }
140
141 @NotNull
142 private CapturedParamDesc getCapturedParamInfo(@NotNull EnclosedValueDescriptor descriptor) {
143 return CapturedParamDesc.createDesc(this, descriptor.getFieldName(), descriptor.getType());
144 }
145
146 @NotNull
147 public List<Type> getInvokeParamsWithoutCaptured() {
148 Type[] types = typeMapper.mapSignature(functionDescriptor).getAsmMethod().getArgumentTypes();
149 return Arrays.asList(types);
150 }
151
152 @NotNull
153 public Parameters addAllParameters(FieldRemapper remapper) {
154 JvmMethodSignature signature = typeMapper.mapSignature(getFunctionDescriptor());
155 ParametersBuilder builder =
156 ParametersBuilder.initializeBuilderFrom(AsmTypes.OBJECT_TYPE, signature.getAsmMethod().getDescriptor(), this);
157
158 for (CapturedParamDesc info : getCapturedVars()) {
159 CapturedParamInfo field = remapper.findField(new FieldInsnNode(0, info.getContainingLambdaName(), info.getFieldName(), ""));
160 builder.addCapturedParam(field, info.getFieldName());
161 }
162
163 return builder.buildParameters();
164 }
165
166 @Override
167 public Type getType() {
168 return closureClassType;
169 }
170
171 @Override
172 public boolean isMyLabel(@NotNull String name) {
173 return labels.contains(name);
174 }
175
176 }
177