/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000-2002 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Ant", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
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 *
 * 5. Products derived from this software may not be called "Apache"
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 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */
package org.apache.tools.ant.taskdefs.optional.depend.constantpool;

import java.io.DataInputStream;
import java.io.IOException;

/**
 * A InterfaceMethodRef CP Info
 *
 * @author Conor MacNeill
 */
public class InterfaceMethodRefCPInfo extends ConstantPoolEntry {
    /** the class name of the class defining the interafce method */
    private String interfaceMethodClassName;
    /** the name of the interface nmethod */
    private String interfaceMethodName;
    /** the method signature of the interface method */
    private String interfaceMethodType;
    /**
     * the index into the constant pool of the class entry for the interface
     * class
     */
    private int classIndex;
    /**
     * the index into the constant pool of the name and type entry
     * describing the method
     */
    private int nameAndTypeIndex;

    /** Constructor. */
    public InterfaceMethodRefCPInfo() {
        super(CONSTANT_INTERFACEMETHODREF, 1);
    }

    /**
     * read a constant pool entry from a class stream.
     *
     * @param cpStream the DataInputStream which contains the constant pool
     *      entry to be read.
     * @exception IOException if there is a problem reading the entry from
     *      the stream.
     */
    public void read(DataInputStream cpStream) throws IOException {
        classIndex = cpStream.readUnsignedShort();
        nameAndTypeIndex = cpStream.readUnsignedShort();
    }

    /**
     * Resolve this constant pool entry with respect to its dependents in
     * the constant pool.
     *
     * @param constantPool the constant pool of which this entry is a member
     *      and against which this entry is to be resolved.
     */
    public void resolve(ConstantPool constantPool) {
        ClassCPInfo interfaceMethodClass
             = (ClassCPInfo) constantPool.getEntry(classIndex);

        interfaceMethodClass.resolve(constantPool);

        interfaceMethodClassName = interfaceMethodClass.getClassName();

        NameAndTypeCPInfo nt
             = (NameAndTypeCPInfo) constantPool.getEntry(nameAndTypeIndex);

        nt.resolve(constantPool);

        interfaceMethodName = nt.getName();
        interfaceMethodType = nt.getType();

        super.resolve(constantPool);
    }

    /**
     * Print a readable version of the constant pool entry.
     *
     * @return the string representation of this constant pool entry.
     */
    public String toString() {
        String value;

        if (isResolved()) {
            value = "InterfaceMethod : Class = " + interfaceMethodClassName
                 + ", name = " + interfaceMethodName + ", type = "
                 + interfaceMethodType;
        } else {
            value = "InterfaceMethod : Class index = " + classIndex
                 + ", name and type index = " + nameAndTypeIndex;
        }

        return value;
    }

    /**
     * Gets the name of the class defining the interface method
     *
     * @return the name of the class defining the interface method
     */
    public String getInterfaceMethodClassName() {
        return interfaceMethodClassName;
    }

    /**
     * Get the name of the interface method
     *
     * @return the name of the interface method
     */
    public String getInterfaceMethodName() {
        return interfaceMethodName;
    }

    /**
     * Gets the type of the interface method
     *
     * @return the interface method's type signature
     */
    public String getInterfaceMethodType() {
        return interfaceMethodType;
    }

}