/*
 * Copyright (c) 2001-2013 Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - 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.
 *
 *   - Neither the name of Oracle nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * 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 USE, DATA, OR
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 */

package com.sun.msv.util;

import com.sun.msv.grammar.SimpleNameClass;

/**
 * pair of Strings.
 * 
 * @author <a href="mailto:kohsuke.kawaguchi@eng.sun.com">Kohsuke KAWAGUCHI</a>
 */
public final class StringPair implements java.io.Serializable
{
    public final String namespaceURI;
    public final String localName;
    
    public StringPair( SimpleNameClass name ) { this(name.namespaceURI, name.localName); }
    public StringPair( String ns, String ln ) {
        // assertion check
        if(ns==null)
            throw new InternalError("namespace URI is null");
        if(ln==null)
            throw new InternalError("local name is null");
        
        namespaceURI=ns;
        localName=ln;
    }
    
    public boolean equals( Object o )
    {
        if(!(o instanceof StringPair))    return false;
        
        return namespaceURI.equals(((StringPair)o).namespaceURI)
            && localName.equals(((StringPair)o).localName);
    }
    public int hashCode() { return namespaceURI.hashCode()^localName.hashCode(); }
    
    public String toString() {
        return "{"+namespaceURI+"}"+localName;
    }
}
