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/*
* QName.java
* Copyright (C) 2004 The Free Software Foundation
*
* This file is part of GNU JAXP, a library.
*
* GNU JAXP is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GNU JAXP 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Linking this library statically or dynamically with other modules is
* making a combined work based on this library. Thus, the terms and
* conditions of the GNU General Public License cover the whole
* combination.
*
* As a special exception, the copyright holders of this library give you
* permission to link this library with independent modules to produce an
* executable, regardless of the license terms of these independent
* modules, and to copy and distribute the resulting executable under
* terms of your choice, provided that you also meet, for each linked
* independent module, the terms and conditions of the license of that
* module. An independent module is a module which is not derived from
* or based on this library. If you modify this library, you may extend
* this exception to your version of the library, but you are not
* obliged to do so. If you do not wish to do so, delete this
* exception statement from your version.
*/
package javax.xml.namespace;
import javax.xml.XMLConstants;
/**
* An XML
* <a href='http://www.w3.org/TR/REC-xml-names/#ns-qualnames'>qualified name</a>.
*
* @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
* @since 1.3
*/
public class QName
{
private final String namespaceURI;
private final String localPart;
private final String prefix;
private final String qName;
int hashCode = -1;
public QName(String namespaceURI, String localPart)
{
this(namespaceURI, localPart, null);
}
public QName(String namespaceURI, String localPart, String prefix)
{
if (namespaceURI == null)
{
namespaceURI = XMLConstants.NULL_NS_URI;
}
if (localPart == null)
{
throw new IllegalArgumentException();
}
if (prefix == null)
{
prefix = XMLConstants.DEFAULT_NS_PREFIX;
}
this.namespaceURI = namespaceURI;
this.localPart = localPart;
this.prefix = prefix;
StringBuffer buf = new StringBuffer();
if (namespaceURI != null && namespaceURI.length() > 0)
{
buf.append('{');
buf.append(namespaceURI);
buf.append('}');
}
if (prefix != null && prefix.length() > 0)
{
buf.append(prefix);
buf.append(':');
}
buf.append(localPart);
qName = buf.toString();
}
public QName(String localPart)
{
this(null, localPart, null);
}
public String getNamespaceURI()
{
return namespaceURI;
}
public String getLocalPart()
{
return localPart;
}
public String getPrefix()
{
return prefix;
}
public boolean equals(Object obj)
{
if (obj instanceof QName)
{
QName qname = (QName) obj;
return qname.getLocalPart().equals(localPart) &&
qname.getNamespaceURI().equals(namespaceURI);
}
return false;
}
public final int hashCode()
{
if (hashCode == -1)
{
StringBuffer buf = new StringBuffer();
buf.append('{');
buf.append(namespaceURI);
buf.append('}');
buf.append(localPart);
hashCode = buf.toString().hashCode();
}
return hashCode;
}
public String toString()
{
return qName;
}
public static QName valueOf(String qNameAsString)
{
String namespaceUri = "", prefix = null;
int start = qNameAsString.indexOf('{');
int end = qNameAsString.indexOf('}');
if (start != -1)
{
if (end < start)
{
throw new IllegalArgumentException(qNameAsString);
}
namespaceUri = qNameAsString.substring(start + 1, end);
qNameAsString = qNameAsString.substring(end + 1);
}
start = qNameAsString.indexOf(':');
if (start != -1)
{
prefix = qNameAsString.substring(0, start);
qNameAsString = qNameAsString.substring(start + 1);
}
return new QName(namespaceUri, qNameAsString, prefix);
}
}
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