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/*
* Copyright 2005-2014 Red Hat, Inc.
* Red Hat 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.hornetq.rest;
import org.hornetq.rest.util.HttpMessageHelper;
import org.jboss.resteasy.core.Headers;
import org.jboss.resteasy.spi.ResteasyProviderFactory;
import org.jboss.resteasy.util.GenericType;
import javax.jms.BytesMessage;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.ObjectMessage;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.Providers;
import java.io.ByteArrayInputStream;
import java.lang.reflect.Type;
/**
* @author Bill Burke
* @version $Revision: 1 $
*/
public class Jms
{
/**
* Set a JMS Message property to the value of an HTTP header
*
* @param message
* @param name
* @param value
*/
public static void setHttpHeader(Message message, String name, String value)
{
try
{
message.setStringProperty(HttpHeaderProperty.toPropertyName(name), value);
}
catch (JMSException e)
{
throw new RuntimeException(e);
}
}
/**
* Get an HTTP header value from a JMS Message
* @param message
* @param name
* @return the header or {@code null} if not present
*/
public static String getHttpHeader(Message message, String name)
{
try
{
return message.getStringProperty(HttpHeaderProperty.toPropertyName(name));
}
catch (JMSException e)
{
throw new RuntimeException(e);
}
}
/**
* Extract an object using a built-in RESTEasy JAX-RS MessageBodyReader
*
* @param message
* @param type
* @param
* @return
*/
public static T getEntity(Message message, Class type)
{
return getEntity(message, type, null, ResteasyProviderFactory.getInstance());
}
/**
* Extract an object using a built-in RESTEasy JAX-RS MessageBodyReader
*
* @param message
* @param type
* @param factory
* @param
* @return
*/
public static T getEntity(Message message, Class type, ResteasyProviderFactory factory)
{
return getEntity(message, type, null, factory);
}
/**
* Extract an object using a built-in RESTEasy JAX-RS MessageBodyReader
*
* @param message
* @param type
* @param factory
* @param
* @return
* @throws UnknownMediaType
* @throws UnmarshalException
*/
public static T getEntity(Message message, GenericType type, ResteasyProviderFactory factory) throws UnknownMediaType
{
return getEntity(message, type.getType(), type.getGenericType(), factory);
}
public static boolean isHttpMessage(Message message)
{
try
{
Boolean aBoolean = message.getBooleanProperty(HttpMessageHelper.POSTED_AS_HTTP_MESSAGE);
return aBoolean != null && aBoolean.booleanValue() == true;
}
catch (JMSException e)
{
return false;
}
}
/**
* Extract an object using a built-in RESTEasy JAX-RS MessageBodyReader
*
* @param message
* @param type
* @param genericType
* @param factory
* @param
* @return
* @throws UnknownMediaType
* @throws UnmarshalException
*/
public static T getEntity(Message message, Class type, Type genericType, ResteasyProviderFactory factory) throws UnknownMediaType
{
if (!isHttpMessage(message))
{
try
{
return (T) ((ObjectMessage) message).getObject();
}
catch (JMSException e)
{
throw new RuntimeException(e);
}
}
BytesMessage bytesMessage = (BytesMessage) message;
try
{
long size = bytesMessage.getBodyLength();
if (size <= 0)
{
return null;
}
byte[] body = new byte[(int) size];
bytesMessage.readBytes(body);
String contentType = message.getStringProperty(HttpHeaderProperty.CONTENT_TYPE);
if (contentType == null)
{
throw new UnknownMediaType("Message did not have a Content-Type header cannot extract entity");
}
MediaType ct = MediaType.valueOf(contentType);
MessageBodyReader reader = factory.getMessageBodyReader(type, genericType, null, ct);
if (reader == null)
{
throw new UnmarshalException("Unable to find a JAX-RS reader for type " + type.getName() + " and media type " + contentType);
}
Providers current = ResteasyProviderFactory.getContextData(Providers.class);
ResteasyProviderFactory.pushContext(Providers.class, factory);
try
{
return reader.readFrom(type, genericType, null, ct, new Headers(), new ByteArrayInputStream(body));
}
finally
{
ResteasyProviderFactory.popContextData(Providers.class);
if (current != null) ResteasyProviderFactory.pushContext(Providers.class, current);
}
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
}
