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/*
* Copyright 2001, 2002,2004 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 xni;
import org.apache.xerces.xni.Augmentations;
import org.apache.xerces.xni.QName;
import org.apache.xerces.xni.XMLAttributes;
import org.apache.xerces.xni.XNIException;
/**
* This sample demonstrates how to create a filter for the document
* "streaming" information set that turns element names into upper
* case.
* <p>
* <strong>Note:</strong> This sample does not contain a
* <code>main</code> method and cannot be run. It is only for
* demonstration purposes.
*
* @author Andy Clark, IBM
*
* @version $Id: UpperCaseFilter.java 319809 2004-02-24 23:52:54Z mrglavas $
*/
public class UpperCaseFilter
extends PassThroughFilter {
//
// Data
//
/**
* Temporary QName structure used by the <code>toUpperCase</code>
* method. It should not be used anywhere else.
*
* @see #toUpperCase
*/
private final QName fQName = new QName();
//
// XMLDocumentHandler methods
//
/**
* The start of an element.
*
* @param element The name of the element.
* @param attributes The element attributes.
*
* @throws XNIException Thrown by handler to signal an error.
*/
public void startElement(QName element, XMLAttributes attributes, Augmentations augs)
throws XNIException {
super.startElement(toUpperCase(element), attributes, augs);
} // startElement(QName,XMLAttributes)
/**
* An empty element.
*
* @param element The name of the element.
* @param attributes The element attributes.
*
* @throws XNIException Thrown by handler to signal an error.
*/
public void emptyElement(QName element, XMLAttributes attributes, Augmentations augs)
throws XNIException {
super.emptyElement(toUpperCase(element), attributes, augs);
} // emptyElement(QName,XMLAttributes)
/**
* The end of an element.
*
* @param element The name of the element.
*
* @throws XNIException Thrown by handler to signal an error.
*/
public void endElement(QName element, Augmentations augs)
throws XNIException {
super.endElement(toUpperCase(element), augs);
} // endElement(QName)
//
// Protected methods
//
/**
* This method upper-cases the prefix, localpart, and rawname
* fields in the specified QName and returns a different
* QName object containing the upper-cased string values.
*
* @param qname The QName to upper-case.
*/
protected QName toUpperCase(QName qname) {
String prefix = qname.prefix != null
? qname.prefix.toUpperCase() : null;
String localpart = qname.localpart != null
? qname.localpart.toUpperCase() : null;
String rawname = qname.rawname != null
? qname.rawname.toUpperCase() : null;
String uri = qname.uri;
fQName.setValues(prefix, localpart, rawname, uri);
return fQName;
} // toUpperCase(QName):QName
} // class UpperCaseFilter
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