017 package org.apache.servicemix.components.util

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2008-05-15 22.29 http://servicemix.apache.org/dist/servicemix-3.2.1/site/parent/co…/org/apache/servicemix/components/util/DefaultFileMarshaler.html

Sida 1 av 3 001 /*

002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership.

005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at

008 *

009 * http://www.apache.org/licenses/LICENSE-2.0 010 *

011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

014 * See the License for the specific language governing permissions and 015 * limitations under the License.

016 */

017 package org.apache.servicemix.components.util;

018

019 import java.io.File;

020 import java.io.IOException;

021 import java.io.InputStream;

022 import java.io.ObjectOutputStream;

023 import java.io.OutputStream;

024 import java.io.OutputStreamWriter;

025

026 import javax.jbi.JBIException;

027 import javax.jbi.messaging.MessageExchange;

028 import javax.jbi.messaging.MessagingException;

029 import javax.jbi.messaging.NormalizedMessage;

030 import javax.xml.transform.Source;

031 import javax.xml.transform.TransformerException;

032 import javax.xml.transform.stream.StreamResult;

033 import javax.xml.transform.stream.StreamSource;

034

035 import org.apache.servicemix.expression.Expression;

036 import org.apache.servicemix.expression.PropertyExpression;

037 import org.apache.servicemix.jbi.NoMessageContentAvailableException;

038 039 /**

040 * A default file transformer which assumes the file is already in XML format and 041 * requires no transformation other than to be wrapped in a normalized message..

042 *

043 * @org.apache.xbean.XBean 044 * @version $Revision: 564374 $ 045 */

046 public class DefaultFileMarshaler extends MarshalerSupport implements FileMarshaler { 047

048 public static final String FILE_NAME_PROPERTY = "org.apache.servicemix.file.name";

049 public static final String FILE_PATH_PROPERTY = "org.apache.servicemix.file.path";

050 public static final String FILE_CONTENT = "org.apache.servicemix.file.content";

051

052 protected static final PropertyExpression FILE_NAME_EXPRESSION = new PropertyExpression(FILE_NAME_PROPERTY);

053 protected static final PropertyExpression FILE_CONTENT_EXPRESSION = new PropertyExpression(FILE_CONTENT);

054

055 private Expression fileName = FILE_NAME_EXPRESSION;

056 private Expression content = FILE_CONTENT_EXPRESSION;

057

058 public void readMessage(MessageExchange exchange, NormalizedMessage message,

059 InputStream in, String path) throws IOException, JBIException { 060 message.setContent(new StreamSource(in, path));

061 message.setProperty(FILE_NAME_PROPERTY, new File(path).getName());

062 message.setProperty(FILE_PATH_PROPERTY, path);

063 } 064

065 public String getOutputName(MessageExchange exchange, NormalizedMessage message) throws MessagingException { 066 return asString(fileName.evaluate(exchange, message));

067 } 068

069 public void writeMessage(MessageExchange exchange, NormalizedMessage message,

070 OutputStream out, String path) throws IOException, JBIException { 071 try {

072 Object value = content.evaluate(exchange, message);

073 if (value != null) { 074 writeValue(value, out);

075 } else {

076 writeMessageContent(exchange, message, out, path);

077 }

078 } catch (IOException e) {

079 throw new MessagingException(e);

080 } 081 } 082

083 // Properties

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Sida 2 av 3 084 //---

085 public Expression getContent() { 086 return content;

087 } 088

089 public void setContent(Expression content) { 090 this.content = content;

091 } 092

093 public Expression getFileName() { 094 return fileName;

095 } 096

097 public void setFileName(Expression fileName) { 098 this.fileName = fileName;

099 } 100

101 // Implementation methods

102 //--- 103

104 /**

105 * Writes the given value to the output stream 106 *

107 * @param value the value to be written to the stream 108 * @param out the output stream

109 */

110 protected void writeValue(Object value, OutputStream out) throws IOException, MessagingException { 111 if (value instanceof String) {

112 OutputStreamWriter writer = new OutputStreamWriter(out);

113 writer.write((String) value);

114 writer.flush();

115 } else if (value instanceof byte[]) { 116 out.write((byte[]) value);

117 } else {

118 ObjectOutputStream objectOut = new ObjectOutputStream(out);

119 objectOut.writeObject(value);

120 } 121 } 122 123 /**

124 * Writes the message content to the given output stream 125 *

126 * @param message the message who's content we are about to write 127 * @param out the destination of the output

128 * @param path the name of the output resource (file, uri, url) 129 */

130 protected void writeMessageContent(MessageExchange exchange, NormalizedMessage message, 131 OutputStream out, String path) throws MessagingException { 132 Source src = message.getContent();

133 if (src == null) {

134 throw new NoMessageContentAvailableException(exchange);

135 } 136 try {

137 getTransformer().toResult(src, new StreamResult(out));

138 } catch (TransformerException e) { 139 throw new MessagingException(e);

140 } 141 } 142 }

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