Apache CXF example source code file (StaxSource.java)

This example Apache CXF source code file (StaxSource.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

attributesimpl, cdata, contenthandler, lexicalhandler, object, sax, saxexception, saxexception, saxnotrecognizedexception, saxnotrecognizedexception, saxnotsupportedexception, saxnotsupportedexception, string, string, xml, xmlstreamreader

The Apache CXF StaxSource.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 javax.xml.XMLConstants;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.transform.sax.SAXSource;

import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.DTDHandler;
import org.xml.sax.EntityResolver;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
import org.xml.sax.SAXParseException;
import org.xml.sax.XMLReader;
import org.xml.sax.ext.LexicalHandler;
import org.xml.sax.helpers.AttributesImpl;

public class StaxSource extends SAXSource implements XMLReader {

    private XMLStreamReader streamReader;

    private ContentHandler contentHandler;
    
    private LexicalHandler lexicalHandler;

    public StaxSource(XMLStreamReader streamReader) {
        this.streamReader = streamReader;
        setInputSource(new InputSource());
    }

    public XMLReader getXMLReader() {
        return this;
    }

    public XMLStreamReader getXMLStreamReader() {
        return streamReader;
    }

    protected void parse() throws SAXException {
        try {
            while (true) {
                switch (streamReader.getEventType()) {
                // Attributes are handled in START_ELEMENT
                case XMLStreamConstants.ATTRIBUTE:
                    break;
                case XMLStreamConstants.CDATA:
                {
                    if (lexicalHandler != null) {
                        lexicalHandler.startCDATA();
                    }
                    int length = streamReader.getTextLength();
                    int start = streamReader.getTextStart();
                    char[] chars = streamReader.getTextCharacters();
                    contentHandler.characters(chars, start, length);
                    if (lexicalHandler != null) {
                        lexicalHandler.endCDATA();
                    }
                    break;
                }
                case XMLStreamConstants.CHARACTERS:
                {
                    int length = streamReader.getTextLength();
                    int start = streamReader.getTextStart();
                    char[] chars = streamReader.getTextCharacters();
                    contentHandler.characters(chars, start, length);
                    break;
                }
                case XMLStreamConstants.SPACE:
                {
                    int length = streamReader.getTextLength();
                    int start = streamReader.getTextStart();
                    char[] chars = streamReader.getTextCharacters();
                    contentHandler.ignorableWhitespace(chars, start, length);
                    break;
                }
                case XMLStreamConstants.COMMENT:
                    if (lexicalHandler != null) {
                        int length = streamReader.getTextLength();
                        int start = streamReader.getTextStart();
                        char[] chars = streamReader.getTextCharacters();
                        lexicalHandler.comment(chars, start, length);
                    }
                    break;
                case XMLStreamConstants.DTD:
                    break;
                case XMLStreamConstants.END_DOCUMENT:
                    contentHandler.endDocument();
                    return;
                case XMLStreamConstants.END_ELEMENT: {
                    String uri = streamReader.getNamespaceURI();
                    String localName = streamReader.getLocalName();
                    String prefix = streamReader.getPrefix();
                    String qname = prefix != null && prefix.length() > 0 
                        ? prefix + ":" + localName : localName;
                    contentHandler.endElement(uri, localName, qname);
                    break;
                }
                case XMLStreamConstants.ENTITY_DECLARATION:
                case XMLStreamConstants.ENTITY_REFERENCE:
                case XMLStreamConstants.NAMESPACE:
                case XMLStreamConstants.NOTATION_DECLARATION:
                    break;
                case XMLStreamConstants.PROCESSING_INSTRUCTION:
                    break;
                case XMLStreamConstants.START_DOCUMENT:
                    contentHandler.startDocument();
                    break;
                case XMLStreamConstants.START_ELEMENT: {
                    String uri = streamReader.getNamespaceURI();
                    String localName = streamReader.getLocalName();
                    String prefix = streamReader.getPrefix();
                    String qname = prefix != null && prefix.length() > 0 
                        ? prefix + ":" + localName : localName;
                    contentHandler.startElement(uri == null ? "" : uri, localName, qname, getAttributes());
                    break;
                }
                default:
                    break;
                }
                if (!streamReader.hasNext()) {
                    return;
                }
                streamReader.next();
            }
        } catch (XMLStreamException e) {
            SAXParseException spe;
            if (e.getLocation() != null) {
                spe = new SAXParseException(e.getMessage(), null, null,
                                            e.getLocation().getLineNumber(),
                                            e.getLocation().getColumnNumber(), e);
            } else {
                spe = new SAXParseException(e.getMessage(), null, null, -1, -1, e);
            }
            spe.initCause(e);
            throw spe;
        }
    }

    protected String getQualifiedName() {
        String prefix = streamReader.getPrefix();
        if (prefix != null && prefix.length() > 0) {
            return prefix + ":" + streamReader.getLocalName();
        } else {
            return streamReader.getLocalName();
        }
    }

    protected Attributes getAttributes() {
        AttributesImpl attrs = new AttributesImpl();
        // Adding namespace declaration as attributes is necessary because
        // the xalan implementation that ships with SUN JDK 1.4 is bugged
        // and does not handle the startPrefixMapping method
        for (int i = 0; i < streamReader.getNamespaceCount(); i++) {
            String prefix = streamReader.getNamespacePrefix(i);
            String uri = streamReader.getNamespaceURI(i);
            if (uri == null) {
                uri = "";
            }
            // Default namespace
            if (prefix == null || prefix.length() == 0) {
                attrs.addAttribute(XMLConstants.DEFAULT_NS_PREFIX, 
                                   null, 
                                   XMLConstants.XMLNS_ATTRIBUTE, 
                                   "CDATA", 
                                   uri);
            } else {
                attrs.addAttribute(XMLConstants.XMLNS_ATTRIBUTE_NS_URI, 
                                   prefix, 
                                   XMLConstants.XMLNS_ATTRIBUTE + ":" + prefix, 
                                   "CDATA", 
                                   uri);
            }
        }
        for (int i = 0; i < streamReader.getAttributeCount(); i++) {
            String uri = streamReader.getAttributeNamespace(i);
            String localName = streamReader.getAttributeLocalName(i);
            String prefix = streamReader.getAttributePrefix(i);
            String qName;
            if (prefix != null && prefix.length() > 0) {
                qName = prefix + ':' + localName;
            } else {
                qName = localName;
            }
            String type = streamReader.getAttributeType(i);
            String value = streamReader.getAttributeValue(i);
            if (value == null) {
                value = "";
            }

            attrs.addAttribute(uri == null ? "" : uri, localName, qName, type, value);
        }
        return attrs;
    }

    public boolean getFeature(String name) throws SAXNotRecognizedException, SAXNotSupportedException {
        return false;
    }

    public void setFeature(String name, boolean value) 
        throws SAXNotRecognizedException, SAXNotSupportedException {
    }

    public Object getProperty(String name) throws SAXNotRecognizedException, SAXNotSupportedException {
        return null;
    }

    public void setProperty(String name, Object value) 
        throws SAXNotRecognizedException, SAXNotSupportedException {
        if ("http://xml.org/sax/properties/lexical-handler".equals(name)) {
            lexicalHandler = (LexicalHandler) value;
        } else {
            throw new SAXNotRecognizedException(name);
        }
    }

    public void setEntityResolver(EntityResolver resolver) {
    }

    public EntityResolver getEntityResolver() {
        return null;
    }

    public void setDTDHandler(DTDHandler handler) {
    }

    public DTDHandler getDTDHandler() {
        return null;
    }

    public void setContentHandler(ContentHandler handler) {
        this.contentHandler = handler;
    }

    public ContentHandler getContentHandler() {
        return this.contentHandler;
    }

    public void setErrorHandler(ErrorHandler handler) {
    }

    public ErrorHandler getErrorHandler() {
        return null;
    }

    public void parse(InputSource input) throws SAXException {
        StaxSource.this.parse();
    }

    public void parse(String systemId) throws SAXException {
        StaxSource.this.parse();
    }

}