/*

 * Copyright 2005 Sun Microsystems, Inc.  All Rights Reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package com.sun.xml.internal.stream.events;

import javax.xml.stream.events.Namespace;

import javax.xml.stream.events.XMLEvent;

import javax.xml.namespace.QName;

import javax.xml.XMLConstants;

/**

 *

 * @author  Neeraj Bajaj,K.Venugopal@sun.com  Sun Microsystems.

 */

public class NamespaceImpl extends AttributeImpl implements Namespace{

    public NamespaceImpl( ) {

        init();

    }

    /** Creates a new instance of NamespaceImpl */

    public NamespaceImpl(String namespaceURI) {

        super(XMLConstants.XMLNS_ATTRIBUTE,XMLConstants.XMLNS_ATTRIBUTE_NS_URI,XMLConstants.DEFAULT_NS_PREFIX,namespaceURI,null);

        init();

    }

    public NamespaceImpl(String prefix, String namespaceURI){

        super(XMLConstants.XMLNS_ATTRIBUTE,XMLConstants.XMLNS_ATTRIBUTE_NS_URI,prefix,namespaceURI,null);

        init();

    }

    public boolean isDefaultNamespaceDeclaration() {

        QName name = this.getName();

        if(name != null && (name.getLocalPart().equals(XMLConstants.DEFAULT_NS_PREFIX)))

            return true;

        return false;

    }

    void setPrefix(String prefix){

        if(prefix == null)

            setName(new QName(XMLConstants.XMLNS_ATTRIBUTE_NS_URI,XMLConstants.DEFAULT_NS_PREFIX,XMLConstants.XMLNS_ATTRIBUTE));

        else// new QName(uri, localpart, prefix)

            setName(new QName(XMLConstants.XMLNS_ATTRIBUTE_NS_URI,prefix,XMLConstants.XMLNS_ATTRIBUTE));

    }

    public String getPrefix() {

        //for a namespace declaration xmlns:prefix="uri" to get the prefix we have to get the

        //local name if this declaration is stored as QName.

        QName name = this.getName();

        if(name != null)

            return name.getLocalPart();

        return null;

    }

    public String getNamespaceURI() {

        //we are treating namespace declaration as attribute -- so URI is stored as value

        //xmlns:prefix="Value"

        return this.getValue();

    }

    void setNamespaceURI(String uri) {

        //we are treating namespace declaration as attribute -- so URI is stored as value

        //xmlns:prefix="Value"

        this.setValue(uri);

    }

    protected void init(){

        setEventType(XMLEvent.NAMESPACE);

    }

    public int getEventType(){

        return XMLEvent.NAMESPACE;

    }

    public boolean isNamespace(){

        return true;

    }

}