/**
* 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.camel.util;
import org.apache.camel.Message;
import org.apache.camel.NoTypeConversionAvailableException;
import org.apache.camel.converter.stream.StreamCache;
/**
* Some helper methods when working with {@link org.apache.camel.Message}.
*
* @version $Revision: 767437 $
*/
public final class MessageHelper {
/**
* Utility classes should not have a public constructor.
*/
private MessageHelper() {
}
/**
* Extracts the given body and returns it as a String, that
* can be used for logging etc.
* <p/>
* Will handle stream based bodies wrapped in StreamCache.
*
* @param message the message with the body
* @return the body as String, can return <tt>null</null> if no body
*/
public static String extractBodyAsString(Message message) {
if (message == null) {
return null;
}
StreamCache newBody = null;
try {
newBody = message.getBody(StreamCache.class);
if (newBody != null) {
message.setBody(newBody);
}
} catch (NoTypeConversionAvailableException ex) {
// ignore, in not of StreamCache type
}
Object answer;
try {
answer = message.getBody(String.class);
} catch (NoTypeConversionAvailableException ex) {
answer = message.getBody();
}
if (newBody != null) {
// Reset the InputStreamCache
newBody.reset();
}
return answer != null ? answer.toString() : null;
}
/**
* Gets the given body class type name as a String.
* <p/>
* Will skip java.lang. for the build in Java types.
*
* @param message the message with the body
* @return the body typename as String, can return <tt>null</null> if no body
*/
public static String getBodyTypeName(Message message) {
if (message == null) {
return null;
}
String answer = ObjectHelper.classCanonicalName(message.getBody());
if (answer != null && answer.startsWith("java.lang.")) {
return answer.substring(10);
}
return answer;
}
/**
* If the message body contains a {@link StreamCache} instance, reset the cache to
* enable reading from it again.
*
* @param message the message for which to reset the body
*/
public static void resetStreamCache(Message message) {
if (message == null) {
return;
}
if (message.getBody() instanceof StreamCache) {
((StreamCache) message.getBody()).reset();
}
}
}