org.apache.xmlbeans.impl.common.XmlReaderToWriter Maven / Gradle / Ivy

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The Apache Commons Codec package contains simple encoder and decoders for various formats such as Base64 and Hexadecimal. In addition to these widely used encoders and decoders, the codec package also maintains a collection of phonetic encoding utilities.
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/*   Copyright 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 org.apache.xmlbeans.impl.common;

import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.stream.events.XMLEvent;


public final class XmlReaderToWriter
{
    private XmlReaderToWriter()
    {
    }

    public static void writeAll(XMLStreamReader xmlr, XMLStreamWriter writer)
        throws XMLStreamException
    {
        while (xmlr.hasNext()) {
            write(xmlr, writer);
            xmlr.next();
        }
        write(xmlr, writer); // write the last element
        writer.flush();
    }

    public static void write(XMLStreamReader xmlr, XMLStreamWriter writer)
        throws XMLStreamException
    {
        switch (xmlr.getEventType()) {
            case XMLEvent.START_ELEMENT:
                final String localName = xmlr.getLocalName();
                final String namespaceURI = xmlr.getNamespaceURI();
                if (namespaceURI != null && namespaceURI.length() > 0) {
                    final String prefix = xmlr.getPrefix();
                    if (prefix != null)
                        writer.writeStartElement(prefix, localName,
                                                 namespaceURI);
                    else
                        writer.writeStartElement(namespaceURI, localName);
                } else {
                    writer.writeStartElement(localName);
                }

                for (int i = 0, len = xmlr.getNamespaceCount(); i < len; i++) {
                    writer.writeNamespace(xmlr.getNamespacePrefix(i),
                                          xmlr.getNamespaceURI(i));
                }

                for (int i = 0, len = xmlr.getAttributeCount(); i < len; i++) {
                    String attUri = xmlr.getAttributeNamespace(i);
                    if (attUri != null)
                        writer.writeAttribute(attUri,
                                              xmlr.getAttributeLocalName(i),
                                              xmlr.getAttributeValue(i));
                    else
                        writer.writeAttribute(xmlr.getAttributeLocalName(i),
                                              xmlr.getAttributeValue(i));
                }
                break;
            case XMLEvent.END_ELEMENT:
                writer.writeEndElement();
                break;
            case XMLEvent.SPACE:
            case XMLEvent.CHARACTERS:
                writer.writeCharacters(xmlr.getTextCharacters(),
                                       xmlr.getTextStart(),
                                       xmlr.getTextLength());
                break;
            case XMLEvent.PROCESSING_INSTRUCTION:
                writer.writeProcessingInstruction(xmlr.getPITarget(),
                                                  xmlr.getPIData());
                break;
            case XMLEvent.CDATA:
                writer.writeCData(xmlr.getText());
                break;

            case XMLEvent.COMMENT:
                writer.writeComment(xmlr.getText());
                break;
            case XMLEvent.ENTITY_REFERENCE:
                writer.writeEntityRef(xmlr.getLocalName());
                break;
            case XMLEvent.START_DOCUMENT:
                String encoding = xmlr.getCharacterEncodingScheme();
                String version = xmlr.getVersion();

                if (encoding != null && version != null)
                    writer.writeStartDocument(encoding,
                                              version);
                else if (version != null)
                    writer.writeStartDocument(xmlr.getVersion());
                break;
            case XMLEvent.END_DOCUMENT:
                writer.writeEndDocument();
                break;
            case XMLEvent.DTD:
                writer.writeDTD(xmlr.getText());
                break;
        }
    }
}