org.apache.tomcat.util.bcel.classfile.ConstantCP Maven / Gradle / Ivy
/*
* 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.tomcat.util.bcel.classfile;
import java.io.DataInput;
import java.io.DataOutputStream;
import java.io.IOException;
/**
* Abstract super class for Fieldref and Methodref constants.
*
* @version $Id: ConstantCP.java 992409 2010-09-03 18:35:59Z markt $
* @author M. Dahm
* @see ConstantFieldref
* @see ConstantMethodref
* @see ConstantInterfaceMethodref
*/
public abstract class ConstantCP extends Constant {
private static final long serialVersionUID = 7282382456501145526L;
/** References to the constants containing the class and the field signature
*/
protected int class_index, name_and_type_index;
/**
* Initialize instance from file data.
*
* @param tag Constant type tag
* @param file Input stream
* @throws IOException
*/
ConstantCP(byte tag, DataInput file) throws IOException {
this(tag, file.readUnsignedShort(), file.readUnsignedShort());
}
/**
* @param class_index Reference to the class containing the field
* @param name_and_type_index and the field signature
*/
protected ConstantCP(byte tag, int class_index, int name_and_type_index) {
super(tag);
this.class_index = class_index;
this.name_and_type_index = name_and_type_index;
}
/**
* Dump constant field reference to file stream in binary format.
*
* @param file Output file stream
* @throws IOException
*/
@Override
public final void dump( DataOutputStream file ) throws IOException {
file.writeByte(tag);
file.writeShort(class_index);
file.writeShort(name_and_type_index);
}
/**
* @return Reference (index) to class this field or method belongs to.
*/
public final int getClassIndex() {
return class_index;
}
/**
* @return Reference (index) to signature of the field.
*/
public final int getNameAndTypeIndex() {
return name_and_type_index;
}
/**
* @return String representation.
*/
@Override
public final String toString() {
return super.toString() + "(class_index = " + class_index + ", name_and_type_index = "
+ name_and_type_index + ")";
}
}