org.apache.tomcat.util.bcel.classfile.ConstantClass 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;
import org.apache.tomcat.util.bcel.Constants;
/**
* This class is derived from the abstract
* Constant class
* and represents a reference to a (external) class.
*
* @version $Id: ConstantClass.java 992409 2010-09-03 18:35:59Z markt $
* @author M. Dahm
* @see Constant
*/
public final class ConstantClass extends Constant implements ConstantObject {
private static final long serialVersionUID = -6603658849582876642L;
private int name_index; // Identical to ConstantString except for the name
/**
* Initialize instance from file data.
*
* @param file Input stream
* @throws IOException
*/
ConstantClass(DataInput file) throws IOException {
this(file.readUnsignedShort());
}
/**
* @param name_index Name index in constant pool. Should refer to a
* ConstantUtf8.
*/
public ConstantClass(int name_index) {
super(Constants.CONSTANT_Class);
this.name_index = name_index;
}
/**
* Dump constant class 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(name_index);
}
/**
* @return Name index in constant pool of class name.
*/
public final int getNameIndex() {
return name_index;
}
/**
* @return String representation.
*/
@Override
public final String toString() {
return super.toString() + "(name_index = " + name_index + ")";
}
}