/**
*
* Copyright
* 2009-2015 Jayway Products AB
* 2016-2017 Föreningen Sambruk
*
* Licensed under AGPL, Version 3.0 (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.gnu.org/licenses/agpl.txt
*
* 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 se.streamsource.dci.restlet.server.responsewriter;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.VelocityEngine;
import org.json.JSONException;
import org.json.JSONObject;
import org.qi4j.api.injection.scope.Service;
import org.qi4j.spi.property.PropertyDescriptor;
import org.qi4j.spi.value.ValueDescriptor;
import org.restlet.Response;
import org.restlet.data.MediaType;
import org.restlet.representation.Representation;
import org.restlet.representation.StringRepresentation;
import org.restlet.representation.WriterRepresentation;
import org.restlet.resource.ResourceException;
import java.io.IOException;
import java.io.Writer;
import java.util.Arrays;
import java.util.List;
/**
* JAVADOC
*/
public class ValueDescriptorResponseWriter
extends AbstractResponseWriter
{
private static final List<MediaType> supportedMediaTypes = Arrays.asList( MediaType.TEXT_HTML, MediaType.APPLICATION_JSON );
private Template formHtmlTemplate;
public ValueDescriptorResponseWriter(@Service VelocityEngine velocity) throws Exception
{
formHtmlTemplate = velocity.getTemplate( "rest/template/form.htm" );
}
public boolean write( final Object result, final Response response ) throws ResourceException
{
if (result instanceof ValueDescriptor)
{
MediaType type = getVariant( response.getRequest(), ENGLISH, supportedMediaTypes).getMediaType();
if (MediaType.APPLICATION_JSON.equals(type))
{
JSONObject json = new JSONObject();
ValueDescriptor vd = (ValueDescriptor) result;
try
{
for (PropertyDescriptor propertyDescriptor : vd.state().properties())
{
Object o = propertyDescriptor.initialValue();
if (o == null)
json.put( propertyDescriptor.qualifiedName().name(), JSONObject.NULL );
else
json.put( propertyDescriptor.qualifiedName().name(), o.toString() );
}
} catch (JSONException e)
{
e.printStackTrace();
}
StringRepresentation representation = new StringRepresentation( json.toString(),
MediaType.APPLICATION_JSON );
response.setEntity( representation );
return true;
} else if (MediaType.TEXT_HTML.equals(type))
{
Representation rep = new WriterRepresentation( MediaType.TEXT_HTML )
{
@Override
public void write( Writer writer ) throws IOException
{
VelocityContext context = new VelocityContext();
context.put( "request", response.getRequest() );
context.put( "response", response );
context.put( "result", result );
formHtmlTemplate.merge( context, writer );
}
};
response.setEntity( rep );
return true;
}
}
return false;
}
}