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Apache CXF example source code file (StreamWriterContentHandler.java)

This example Apache CXF source code file (StreamWriterContentHandler.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Apache CXF tags/keywords

attributes, contenthandler, linkedhashmap, map, sax, saxexception, saxexception, streamwritercontenthandler, streamwritercontenthandler, string, string, util, xmlstreamexception, xmlstreamexception, xmlstreamwriter

The Apache CXF StreamWriterContentHandler.java source code

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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 org.apache.cxf.staxutils;

import java.util.LinkedHashMap;
import java.util.Map;

import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;

import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;

import org.apache.cxf.common.util.StringUtils;

/**
 * 
 */
public class StreamWriterContentHandler implements ContentHandler {
    
    XMLStreamWriter writer;
    Map<String, String> mapping = new LinkedHashMap();
    
    public StreamWriterContentHandler(XMLStreamWriter w) {
        writer = w;
    }

    /**
     * Method endDocument.
     *
     * @throws SAXException
     */
    public void endDocument() throws SAXException {
        // do nothing
    }

    /**
     * Method startDocument.
     *
     * @throws SAXException
     */
    public void startDocument() throws SAXException {
        // 
    }

    /**
     * Method characters.
     *
     * @param ch
     * @param start
     * @param length
     * @throws SAXException
     */
    public void characters(char ch[], int start, int length) throws SAXException {
        try {
            writer.writeCharacters(ch, start, length);
        } catch (XMLStreamException e) {
            throw new SAXException(e);
        }
    }

    /**
     * Method ignorableWhitespace.
     *
     * @param ch
     * @param start
     * @param length
     * @throws SAXException
     */
    public void ignorableWhitespace(char ch[], int start, int length) throws SAXException {
    }

    /**
     * Method endPrefixMapping.
     *
     * @param prefix
     * @throws SAXException
     */
    public void endPrefixMapping(String prefix) throws SAXException {
    }

    /**
     * Method skippedEntity.
     *
     * @param name
     * @throws SAXException
     */
    public void skippedEntity(String name) throws SAXException {
    }

    /**
     * Method setDocumentLocator.
     *
     * @param locator
     */
    public void setDocumentLocator(Locator locator) {
    }

    /**
     * Method processingInstruction.
     *
     * @param target
     * @param data
     * @throws SAXException
     */
    public void processingInstruction(String target, String data)
        throws SAXException {
    }

    /**
     * Method startPrefixMapping.
     *
     * @param prefix
     * @param uri
     * @throws SAXException
     */
    public void startPrefixMapping(String prefix, String uri)
        throws SAXException {
        mapping.put(prefix, uri);
        try {
            writer.setPrefix(prefix, uri);
        } catch (XMLStreamException e) {
            throw new SAXException(e);
        }
    }

    /**
     * Method endElement.
     *
     * @param namespaceURI
     * @param localName
     * @param qName
     * @throws SAXException
     */
    public void endElement(String namespaceURI,
                           String localName,
                           String qName) throws SAXException {
        try {
            writer.writeEndElement();
        } catch (XMLStreamException e) {
            throw new SAXException(e);
        }
    }

    /**
     * Method getPrefix.
     * @param namespaceURI 
     *
     * @param qname
     * @return Returns String.
     */
    private String getPrefix(String ns, String namespaceURI) {
        int idx = ns.indexOf(':');
        if (idx != -1) {
            return ns.substring(0, idx);
        } else if (namespaceURI != null && namespaceURI.length() > 0) {
            //this is the case that have namespaceURI but use DEFAULT_NS_PREFIX
            return "";
        } else {
            //this is the case that namespaceURI is just empty, so NS_PREFIX is null
            return null;
        }
    }

    /**
     * Method startElement.
     *
     * @param namespaceURI
     * @param localName
     * @param qName
     * @param atts
     * @throws SAXException
     */
    public void startElement(String namespaceURI,
                             String localName,
                             String qName,
                             Attributes atts) throws SAXException {
        try {
            String prefix = getPrefix(qName, namespaceURI);
            
            // it is only the prefix we want to learn from the QName! so we can get rid of the
            // spliting QName
            if (prefix == null) {
                writer.writeStartElement(namespaceURI, localName);
            } else {
                writer.writeStartElement(prefix, localName, namespaceURI);
            }
            for (Map.Entry<String, String> e : mapping.entrySet()) {
                if ("".equals(e.getKey())) {
                    writer.writeDefaultNamespace(e.getValue());
                } else {
                    writer.writeNamespace(e.getKey(), e.getValue());
                }
            }
            mapping.clear();
            if (atts != null) {
                int attCount = atts.getLength();
                for (int i = 0; i < attCount; i++) {
                    if (StringUtils.isEmpty(atts.getURI(i))) {
                        String s = atts.getLocalName(i);
                        if (StringUtils.isEmpty(s)) {
                            s = atts.getQName(i);
                        }
                        writer.writeAttribute(s,
                                              atts.getValue(i));
                    } else {
                        String pfx = atts.getQName(i);
                        if (pfx.indexOf(':') != -1) {
                            pfx = pfx.substring(0, pfx.indexOf(':'));
                            writer.writeAttribute(pfx,
                                                  atts.getURI(i),
                                                  atts.getLocalName(i),
                                                  atts.getValue(i));
                        } else {
                            writer.writeAttribute(atts.getURI(i),
                                              atts.getLocalName(i),
                                              atts.getValue(i));
                        }
                    }
                }
            }
        } catch (XMLStreamException e) {
            throw new SAXException(e);
        }
    }
    
    

}

Other Apache CXF examples (source code examples)

Here is a short list of links related to this Apache CXF StreamWriterContentHandler.java source code file:

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