/*
* 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.synapse.util;
import org.apache.axiom.om.OMAbstractFactory;
import org.apache.axiom.om.OMDataSourceExt;
import org.apache.axiom.om.OMFactory;
import org.apache.axiom.om.OMOutputFormat;
import org.apache.axiom.om.OMSourcedElement;
import org.apache.axiom.om.ds.OMDataSourceExtBase;
import org.apache.axiom.om.impl.MTOMXMLStreamWriter;
import org.apache.axiom.om.impl.llom.OMSourcedElementImpl;
import org.apache.axiom.om.impl.serialize.StreamingOMSerializer;
import org.apache.axiom.om.util.StAXUtils;
import org.apache.axiom.util.blob.OverflowBlob;
import org.apache.axiom.util.stax.WrappedTextNodeStreamReader;
import org.apache.axis2.transport.base.BaseConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.nio.charset.Charset;
public class TextFileDataSource extends OMDataSourceExtBase {
private final OverflowBlob overflowBlob;
private final Charset charset;
public TextFileDataSource(OverflowBlob overflowBlob, Charset charset) {
this.overflowBlob = overflowBlob;
this.charset = charset;
}
public static OMSourcedElement createOMSourcedElement(OverflowBlob overflowBlob, Charset charset) {
OMFactory fac = OMAbstractFactory.getOMFactory();
TextFileDataSource txtFileDS = new TextFileDataSource(overflowBlob, charset);
return new OMSourcedElementImpl(BaseConstants.DEFAULT_TEXT_WRAPPER, fac, txtFileDS);
}
@Override
public void serialize(OutputStream out, OMOutputFormat format) throws XMLStreamException {
XMLStreamWriter writer = new MTOMXMLStreamWriter(out, format);
serialize(writer);
writer.flush();
}
@Override
public void serialize(Writer writer, OMOutputFormat format) throws XMLStreamException {
MTOMXMLStreamWriter xmlWriter =
new MTOMXMLStreamWriter(StAXUtils.createXMLStreamWriter(writer));
xmlWriter.setOutputFormat(format);
serialize(xmlWriter);
xmlWriter.flush();
}
@Override
public void serialize(XMLStreamWriter xmlWriter) throws XMLStreamException {
StreamingOMSerializer serializer = new StreamingOMSerializer();
serializer.serialize(getReader(), xmlWriter);
}
public XMLStreamReader getReader() throws XMLStreamException {
InputStream is;
try {
is = overflowBlob.getInputStream();
}
catch (IOException ex) {
throw new XMLStreamException(ex);
}
return new WrappedTextNodeStreamReader(
BaseConstants.DEFAULT_TEXT_WRAPPER, new InputStreamReader(is, charset));
}
public Object getObject() {
return overflowBlob;
}
public boolean isDestructiveRead() {
return false;
}
public boolean isDestructiveWrite() {
return false;
}
public byte[] getXMLBytes(String encoding) throws UnsupportedEncodingException {
throw new UnsupportedOperationException();
}
public void close() {
}
public OMDataSourceExt copy() {
return new TextFileDataSource(overflowBlob, charset);
}
}