/*
 * Copyright  2000-2004 The Apache Software Foundation
 *
 *  Licensed 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.DataInputStream;
import java.io.IOException;
import org.apache.bcel.Constants;

/**
 * This class represents a constant pool reference to a field.
 * 
 * @version $Id: ConstantFieldref.java 386056 2006-03-15 11:31:56Z tcurdt $
 * @author <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A>
 */
public final class ConstantFieldref extends ConstantCP {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	/**
	 * Initialize from another object.
	 */
	public ConstantFieldref(ConstantFieldref c) {
		super(Constants.CONSTANT_Fieldref, c.getClassIndex(), c
				.getNameAndTypeIndex());
	}

	/**
	 * Initialize instance from file data.
	 * 
	 * @param file
	 *            input stream
	 * @throws IOException
	 */
	ConstantFieldref(DataInputStream file) throws IOException {
		super(Constants.CONSTANT_Fieldref, file);
	}

	/**
	 * @param class_index
	 *            Reference to the class containing the Field
	 * @param name_and_type_index
	 *            and the Field signature
	 */
	public ConstantFieldref(int class_index, int name_and_type_index) {
		super(Constants.CONSTANT_Fieldref, class_index, name_and_type_index);
	}

	/**
	 * Called by objects that are traversing the nodes of the tree implicitely
	 * defined by the contents of a Java class. I.e., the hierarchy of Fields,
	 * fields, attributes, etc. spawns a tree of objects.
	 * 
	 * @param v
	 *            Visitor object
	 */
	@Override
	public void accept(Visitor v) {
		v.visitConstantFieldref(this);
	}
}
