/**
* 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.databinding.source;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Collection;
import java.util.logging.Logger;
import javax.activation.DataSource;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.transform.Source;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;
import org.apache.cxf.common.classloader.ClassLoaderUtils;
import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.databinding.DataReader;
import org.apache.cxf.interceptor.Fault;
import org.apache.cxf.io.CachedOutputStream;
import org.apache.cxf.message.Attachment;
import org.apache.cxf.message.Message;
import org.apache.cxf.service.model.MessagePartInfo;
import org.apache.cxf.staxutils.DepthXMLStreamReader;
import org.apache.cxf.staxutils.FragmentStreamReader;
import org.apache.cxf.staxutils.StaxSource;
import org.apache.cxf.staxutils.StaxUtils;
import org.apache.cxf.staxutils.W3CDOMStreamReader;
public class XMLStreamDataReader implements DataReader<XMLStreamReader> {
private static final Logger LOG = LogUtils.getL7dLogger(XMLStreamDataReader.class);
private Schema schema;
private Message message;
public Object read(MessagePartInfo part, XMLStreamReader input) {
return read(null, input, part.getTypeClass());
}
public Object read(final QName name, XMLStreamReader input, Class type) {
if (Source.class.equals(type) && message != null) {
//generic Source, find the preferred type
String s = (String)message.getContextualProperty(SourceDataBinding.PREFERRED_FORMAT);
if (StringUtils.isEmpty(s)) {
s = "dom";
}
if ("dom".equalsIgnoreCase(s)) {
type = DOMSource.class;
} else if ("stream".equalsIgnoreCase(s)) {
type = StreamSource.class;
} else if ("sax".equalsIgnoreCase(s) || "cxf.stax".equalsIgnoreCase(s)) {
type = SAXSource.class;
} else if ("stax".equals(s)) {
try {
type = ClassLoaderUtils.loadClass("javax.xml.transform.stax.StAXSource", getClass());
} catch (ClassNotFoundException e) {
type = SAXSource.class;
}
} else {
type = DOMSource.class;
}
}
try {
Element dom = null;
if (schema != null) {
dom = validate(input);
input = StaxUtils.createXMLStreamReader(dom);
}
if (type != null) {
if (SAXSource.class.isAssignableFrom(type)
|| StaxSource.class.isAssignableFrom(type)) {
return new StaxSource(resetForStreaming(input));
} else if (StreamSource.class.isAssignableFrom(type)) {
return new StreamSource(getInputStream(input));
} else if (XMLStreamReader.class.isAssignableFrom(type)) {
return resetForStreaming(input);
} else if (DataSource.class.isAssignableFrom(type)) {
final InputStream ins = getInputStream(input);
return new DataSource() {
public String getContentType() {
return "text/xml";
}
public InputStream getInputStream() throws IOException {
return ins;
}
public String getName() {
return name.toString();
}
public OutputStream getOutputStream() throws IOException {
return null;
}
};
} else if ("javax.xml.transform.stax.StAXSource".equals(type.getName())) {
input = resetForStreaming(input);
Object o = createStaxSource(input, type);
if (o != null) {
return o;
}
}
}
return dom == null ? read(input) : new DOMSource(dom);
} catch (IOException e) {
throw new Fault("COULD_NOT_READ_XML_STREAM", LOG, e);
} catch (XMLStreamException e) {
throw new Fault("COULD_NOT_READ_XML_STREAM", LOG, e);
} catch (SAXException e) {
throw new Fault("COULD_NOT_READ_XML_STREAM", LOG, e);
}
}
private Object createStaxSource(XMLStreamReader input, Class<?> type) {
try {
return type.getConstructor(XMLStreamReader.class).newInstance(input);
} catch (Exception e) {
//ignore
}
return null;
}
private XMLStreamReader resetForStreaming(XMLStreamReader input) throws XMLStreamException {
//Need to mark the message as streaming this so input stream
//is not closed and additional parts are not read and such
if (message != null) {
message.removeContent(XMLStreamReader.class);
final InputStream ins = message.getContent(InputStream.class);
message.removeContent(InputStream.class);
input = new FragmentStreamReader(input) {
boolean closed;
public boolean hasNext() throws XMLStreamException {
boolean b = super.hasNext();
if (!b && !closed) {
closed = true;
try {
ins.close();
} catch (IOException e) {
//ignore
}
}
return b;
}
};
}
return input;
}
private Element validate(XMLStreamReader input)
throws XMLStreamException, SAXException, IOException {
DOMSource ds = read(input);
schema.newValidator().validate(ds);
Node nd = ds.getNode();
if (nd instanceof Document) {
return ((Document)nd).getDocumentElement();
}
return (Element)ds.getNode();
}
private InputStream getInputStream(XMLStreamReader input)
throws XMLStreamException, IOException {
CachedOutputStream out = new CachedOutputStream();
try {
XMLStreamWriter xsw = StaxUtils.createXMLStreamWriter(out);
StaxUtils.copy(input, xsw);
xsw.close();
return out.getInputStream();
} finally {
out.close();
}
}
public DOMSource read(XMLStreamReader reader) {
// Use a DOMSource for now, we should really use a StaxSource/SAXSource though for
// performance reasons
try {
XMLStreamReader reader2 = reader;
if (reader2 instanceof DepthXMLStreamReader) {
reader2 = ((DepthXMLStreamReader)reader2).getReader();
}
if (reader2 instanceof W3CDOMStreamReader) {
W3CDOMStreamReader domreader = (W3CDOMStreamReader)reader2;
DOMSource o = new DOMSource(domreader.getCurrentElement());
domreader.consumeFrame();
return o;
} else {
Document document = StaxUtils.read(reader);
if (reader.hasNext()) {
//need to actually consume the END_ELEMENT
reader.next();
}
return new DOMSource(document);
}
} catch (XMLStreamException e) {
throw new Fault("COULD_NOT_READ_XML_STREAM", LOG, e);
}
}
public void setSchema(Schema s) {
schema = s;
}
public void setAttachments(Collection<Attachment> attachments) {
}
public void setProperty(String prop, Object value) {
if (Message.class.getName().equals(prop)) {
message = (Message)value;
}
}
}