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/*
* 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.tuscany.sca.databinding.jaxb.axiom.ext;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import org.apache.axiom.om.OMDataSourceExt;
import org.apache.axiom.om.OMException;
import org.apache.axiom.om.ds.OMDataSourceExtBase;
import org.apache.axiom.om.util.StAXUtils;
/**
* OMDataSource backed by a source
*/
public class SourceDataSource extends OMDataSourceExtBase {
private Source data;
public SourceDataSource(Source data) {
super();
this.data = data;
}
public void close() {
}
public OMDataSourceExt copy() {
return new SourceDataSource(data);
}
public Object getObject() {
return data;
}
public XMLStreamReader getReader() throws XMLStreamException {
try {
String encoding = "UTF-8";
InputStream is = new ByteArrayInputStream(getXMLBytes(encoding));
return StAXUtils.createXMLStreamReader(is, encoding);
} catch (UnsupportedEncodingException e) {
throw new XMLStreamException(e);
}
}
public byte[] getXMLBytes(String encoding) throws UnsupportedEncodingException {
byte[] bytes = null;
try {
bytes = (byte[])null;
if (data instanceof StreamSource) {
InputStream is = ((StreamSource)data).getInputStream();
if (is != null) {
bytes = getBytesFromStream(is);
}
} else {
ByteArrayOutputStream out = new ByteArrayOutputStream();
Result result = new StreamResult(out);
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.transform(data, result);
bytes = out.toByteArray();
}
} catch (OMException e) {
throw e;
} catch (UnsupportedEncodingException e) {
throw e;
} catch (Throwable e) {
throw new OMException(e);
}
return bytes;
}
public boolean isDestructiveRead() {
return false;
}
public boolean isDestructiveWrite() {
return false;
}
private static byte[] getBytesFromStream(InputStream is) throws IOException {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
byte[] buf = new byte[4096];
while (true) {
int size = is.read(buf);
if (size < 0) {
break;
}
bos.write(buf, 0, size);
}
return bos.toByteArray();
}
}
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