/*
* 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.servicemix.components.util;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.nio.charset.Charset;
import javax.jbi.JBIException;
import javax.jbi.messaging.MessageExchange;
import javax.jbi.messaging.MessagingException;
import javax.jbi.messaging.NormalizedMessage;
import javax.xml.transform.Source;
import javax.xml.transform.TransformerException;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import org.apache.servicemix.expression.Expression;
import org.apache.servicemix.expression.PropertyExpression;
import org.apache.servicemix.jbi.NoMessageContentAvailableException;
/**
* A default file transformer which assumes the file is already in XML format and
* requires no transformation other than to be wrapped in a normalized message..
*
* @org.apache.xbean.XBean
* @version $Revision: 669865 $
*/
public class DefaultFileMarshaler extends MarshalerSupport implements FileMarshaler {
public static final String FILE_NAME_PROPERTY = "org.apache.servicemix.file.name";
public static final String FILE_PATH_PROPERTY = "org.apache.servicemix.file.path";
public static final String FILE_CONTENT = "org.apache.servicemix.file.content";
protected static final PropertyExpression FILE_NAME_EXPRESSION = new PropertyExpression(FILE_NAME_PROPERTY);
protected static final PropertyExpression FILE_CONTENT_EXPRESSION = new PropertyExpression(FILE_CONTENT);
private Expression fileName = FILE_NAME_EXPRESSION;
private Expression content = FILE_CONTENT_EXPRESSION;
private String encoding;
public void readMessage(MessageExchange exchange, NormalizedMessage message,
InputStream in, String path) throws IOException, JBIException {
if (encoding == null) {
message.setContent(new StreamSource(in, path));
} else {
message.setContent(new StreamSource(new InputStreamReader(in, Charset.forName(encoding)), path));
}
message.setProperty(FILE_NAME_PROPERTY, new File(path).getName());
message.setProperty(FILE_PATH_PROPERTY, path);
}
public String getOutputName(MessageExchange exchange, NormalizedMessage message) throws MessagingException {
return asString(fileName.evaluate(exchange, message));
}
public void writeMessage(MessageExchange exchange, NormalizedMessage message,
OutputStream out, String path) throws IOException, JBIException {
try {
Object value = content.evaluate(exchange, message);
if (value != null) {
writeValue(value, out);
} else {
writeMessageContent(exchange, message, out, path);
}
} catch (IOException e) {
throw new MessagingException(e);
}
}
// Properties
//-------------------------------------------------------------------------
public Expression getContent() {
return content;
}
public void setContent(Expression content) {
this.content = content;
}
public Expression getFileName() {
return fileName;
}
public void setFileName(Expression fileName) {
this.fileName = fileName;
}
public void setEncoding(String encoding) {
this.encoding = encoding;
}
public String getEncoding() {
return encoding;
}
// Implementation methods
//-------------------------------------------------------------------------
/**
* Writes the given value to the output stream
*
* @param value the value to be written to the stream
* @param out the output stream
*/
protected void writeValue(Object value, OutputStream out) throws IOException, MessagingException {
if (value instanceof String) {
OutputStreamWriter writer = new OutputStreamWriter(out);
writer.write((String) value);
writer.flush();
} else if (value instanceof byte[]) {
out.write((byte[]) value);
} else {
ObjectOutputStream objectOut = new ObjectOutputStream(out);
objectOut.writeObject(value);
}
}
/**
* Writes the message content to the given output stream
*
* @param message the message who's content we are about to write
* @param out the destination of the output
* @param path the name of the output resource (file, uri, url)
*/
protected void writeMessageContent(MessageExchange exchange, NormalizedMessage message,
OutputStream out, String path) throws MessagingException {
Source src = message.getContent();
if (src == null) {
throw new NoMessageContentAvailableException(exchange);
}
try {
getTransformer().toResult(src, new StreamResult(out), encoding);
} catch (TransformerException e) {
throw new MessagingException(e);
}
}
}