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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.apache.bcel.classfile;
import java.io.DataInput;
import java.io.DataOutputStream;
import java.io.IOException;
import org.apache.bcel.Const;
/**
* This attribute exists for local or
* anonymous classes and ... there can be only one.
*
* @since 6.0
*/
public class EnclosingMethod extends Attribute {
// Pointer to the CONSTANT_Class_info structure representing the
// innermost class that encloses the declaration of the current class.
private int classIndex;
// If the current class is not immediately enclosed by a method or
// constructor, then the value of the method_index item must be zero.
// Otherwise, the value of the method_index item must point to a
// CONSTANT_NameAndType_info structure representing the name and the
// type of a method in the class referenced by the class we point
// to in the class_index. *It is the compiler responsibility* to
// ensure that the method identified by this index is the closest
// lexically enclosing method that includes the local/anonymous class.
private int methodIndex;
// Ctors - and code to read an attribute in.
EnclosingMethod(final int nameIndex, final int len, final DataInput input, final ConstantPool cpool) throws IOException {
this(nameIndex, len, input.readUnsignedShort(), input.readUnsignedShort(), cpool);
}
private EnclosingMethod(final int nameIndex, final int len, final int classIdx,final int methodIdx, final ConstantPool cpool) {
super(Const.ATTR_ENCLOSING_METHOD, nameIndex, len, cpool);
classIndex = classIdx;
methodIndex = methodIdx;
}
@Override
public void accept(final Visitor v) {
v.visitEnclosingMethod(this);
}
@Override
public Attribute copy(final ConstantPool constant_pool) {
return (Attribute) clone();
}
// Accessors
public final int getEnclosingClassIndex() {
return classIndex;
}
public final int getEnclosingMethodIndex() {
return methodIndex;
}
public final void setEnclosingClassIndex(final int idx) {
classIndex = idx;
}
public final void setEnclosingMethodIndex(final int idx) {
methodIndex = idx;
}
public final ConstantClass getEnclosingClass() {
final ConstantClass c =
(ConstantClass)super.getConstantPool().getConstant(classIndex,Const.CONSTANT_Class);
return c;
}
public final ConstantNameAndType getEnclosingMethod() {
if (methodIndex == 0) {
return null;
}
final ConstantNameAndType nat =
(ConstantNameAndType)super.getConstantPool().getConstant(methodIndex,Const.CONSTANT_NameAndType);
return nat;
}
@Override
public final void dump(final DataOutputStream file) throws IOException {
super.dump(file);
file.writeShort(classIndex);
file.writeShort(methodIndex);
}
}
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