/
AbstractFunctionalInterfaceWriter.java
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/
AbstractFunctionalInterfaceWriter.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.codehaus.groovy.classgen.asm.sc;
import org.codehaus.groovy.ast.ClassHelper;
import org.codehaus.groovy.ast.ClassNode;
import org.codehaus.groovy.ast.MethodNode;
import org.codehaus.groovy.ast.Parameter;
import org.codehaus.groovy.ast.expr.Expression;
import org.codehaus.groovy.classgen.asm.BytecodeHelper;
import org.codehaus.groovy.syntax.RuntimeParserException;
import org.objectweb.asm.Handle;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import java.util.Arrays;
import java.util.List;
import static org.codehaus.groovy.ast.ClassHelper.getUnwrapper;
import static org.codehaus.groovy.ast.ClassHelper.getWrapper;
import static org.codehaus.groovy.transform.stc.StaticTypesMarker.INFERRED_FUNCTIONAL_INTERFACE_TYPE;
import static org.codehaus.groovy.transform.stc.StaticTypesMarker.PARAMETER_TYPE;
/**
* Represents functional interface writer which contains some common methods to complete generating bytecode
* @since 3.0.0
*/
public interface AbstractFunctionalInterfaceWriter {
String ORIGINAL_PARAMETERS_WITH_EXACT_TYPE = "__ORIGINAL_PARAMETERS_WITH_EXACT_TYPE";
default ClassNode getFunctionalInterfaceType(Expression expression) {
ClassNode type = expression.getNodeMetaData(PARAMETER_TYPE);
if (null == type) {
type = expression.getNodeMetaData(INFERRED_FUNCTIONAL_INTERFACE_TYPE);
}
return type;
}
default String createMethodDescriptor(MethodNode abstractMethodNode) {
return BytecodeHelper.getMethodDescriptor(
abstractMethodNode.getReturnType().getTypeClass(),
Arrays.stream(abstractMethodNode.getParameters())
.map(e -> e.getType().getTypeClass())
.toArray(Class[]::new)
);
}
default Handle createBootstrapMethod(boolean isInterface, boolean serializable) {
if (serializable) {
return new Handle(
Opcodes.H_INVOKESTATIC,
"java/lang/invoke/LambdaMetafactory",
"altMetafactory",
"(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;[Ljava/lang/Object;)Ljava/lang/invoke/CallSite;",
isInterface
);
}
return new Handle(
Opcodes.H_INVOKESTATIC,
"java/lang/invoke/LambdaMetafactory",
"metafactory",
"(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;",
isInterface
);
}
default Object[] createBootstrapMethodArguments(final String abstractMethodDesc, final int insn, final ClassNode methodOwner, final MethodNode methodNode, final boolean serializable) {
Object[] arguments = !serializable ? new Object[3] : new Object[]{null, null, null, 5, 0};
arguments[0] = Type.getType(abstractMethodDesc);
arguments[1] = new Handle(
insn, // H_INVOKESTATIC or H_INVOKEVIRTUAL or H_INVOKEINTERFACE (GROOVY-9853)
BytecodeHelper.getClassInternalName(methodOwner.getName()),
methodNode.getName(),
BytecodeHelper.getMethodDescriptor(methodNode),
methodOwner.isInterface());
arguments[2] = Type.getType(
BytecodeHelper.getMethodDescriptor(methodNode.getReturnType(),
(Parameter[]) methodNode.getNodeMetaData(ORIGINAL_PARAMETERS_WITH_EXACT_TYPE)));
return arguments;
}
default ClassNode convertParameterType(ClassNode targetType, ClassNode parameterType, ClassNode inferredType) {
if (!getWrapper(inferredType).isDerivedFrom(getWrapper(parameterType))) {
throw new RuntimeParserException("The inferred type[" + inferredType.redirect() + "] is not compatible with the parameter type[" + parameterType.redirect() + "]", parameterType);
}
ClassNode type;
boolean isParameterTypePrimitive = ClassHelper.isPrimitiveType(parameterType);
boolean isInferredTypePrimitive = ClassHelper.isPrimitiveType(inferredType);
if (!isParameterTypePrimitive && isInferredTypePrimitive) {
if (ClassHelper.isDynamicTyped(parameterType) && ClassHelper.isPrimitiveType(targetType) // (1)
|| !parameterType.equals(getUnwrapper(parameterType)) && !inferredType.equals(getWrapper(inferredType)) // (2)
) {
// GROOVY-9790: bootstrap method initialization exception raised when lambda parameter type is wrong
// (1) java.lang.invoke.LambdaConversionException: Type mismatch for instantiated parameter 0: class java.lang.Integer is not a subtype of int
// (2) java.lang.BootstrapMethodError: bootstrap method initialization exception
type = inferredType;
} else {
// The non-primitive type and primitive type are not allowed to mix since Java 9+
// java.lang.invoke.LambdaConversionException: Type mismatch for instantiated parameter 0: int is not a subtype of class java.lang.Object
type = getWrapper(inferredType);
}
} else if (isParameterTypePrimitive && !isInferredTypePrimitive) {
// The non-primitive type and primitive type are not allowed to mix since Java 9+
// java.lang.invoke.LambdaConversionException: Type mismatch for instantiated parameter 0: class java.lang.Integer is not a subtype of int
type = getUnwrapper(inferredType);
} else {
type = inferredType;
}
return type;
}
/**
* @deprecated use {@link #convertParameterType(ClassNode, ClassNode, ClassNode)} instead
*/
@Deprecated
default ClassNode convertParameterType(ClassNode parameterType, ClassNode inferredType) {
if (!ClassHelper.getWrapper(inferredType.redirect()).isDerivedFrom(ClassHelper.getWrapper(parameterType.redirect()))) {
throw new RuntimeParserException("The inferred type[" + inferredType.redirect() + "] is not compatible with the parameter type[" + parameterType.redirect() + "]", parameterType);
} else {
boolean isParameterTypePrimitive = ClassHelper.isPrimitiveType(parameterType);
boolean isInferredTypePrimitive = ClassHelper.isPrimitiveType(inferredType);
ClassNode type;
if (!isParameterTypePrimitive && isInferredTypePrimitive) {
if (parameterType != ClassHelper.getUnwrapper(parameterType) && inferredType != ClassHelper.getWrapper(inferredType)) {
type = inferredType;
} else {
type = ClassHelper.getWrapper(inferredType);
}
} else if (isParameterTypePrimitive && !isInferredTypePrimitive) {
type = ClassHelper.getUnwrapper(inferredType);
} else {
type = inferredType;
}
return type;
}
}
default Parameter prependParameter(List<Parameter> methodParameterList, String parameterName, ClassNode parameterType) {
Parameter parameter = new Parameter(parameterType, parameterName);
parameter.setOriginType(parameterType);
parameter.setClosureSharedVariable(false);
methodParameterList.add(0, parameter);
return parameter;
}
}