| /** |
| * |
| * Copyright 2009-2011 Rickard Öberg AB |
| * |
| * Licensed 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.qi4j.library.rest.client.requestwriter; |
| |
| import java.io.IOException; |
| import java.io.Writer; |
| import org.qi4j.api.injection.scope.Service; |
| import org.qi4j.api.injection.scope.Structure; |
| import org.qi4j.api.property.PropertyDescriptor; |
| import org.qi4j.api.property.StateHolder; |
| import org.qi4j.api.service.qualifier.Tagged; |
| import org.qi4j.api.value.ValueComposite; |
| import org.qi4j.api.value.ValueDescriptor; |
| import org.qi4j.api.value.ValueSerialization; |
| import org.qi4j.api.value.ValueSerializationException; |
| import org.qi4j.api.value.ValueSerializer; |
| import org.qi4j.library.rest.client.spi.RequestWriter; |
| import org.qi4j.spi.Qi4jSPI; |
| import org.restlet.Request; |
| import org.restlet.data.CharacterSet; |
| import org.restlet.data.MediaType; |
| import org.restlet.data.Method; |
| import org.restlet.data.Reference; |
| import org.restlet.engine.io.WriterOutputStream; |
| import org.restlet.representation.WriterRepresentation; |
| import org.restlet.resource.ResourceException; |
| |
| /** |
| * Request writer for ValueComposites. Transfers value state to request reference as query parameters or JSON entity |
| */ |
| public class ValueCompositeRequestWriter |
| implements RequestWriter |
| { |
| @Structure |
| private Qi4jSPI spi; |
| |
| @Service |
| @Tagged( ValueSerialization.Formats.JSON ) |
| private ValueSerializer valueSerializer; |
| |
| @Override |
| public boolean writeRequest(Object requestObject, Request request) throws ResourceException |
| { |
| if (requestObject instanceof ValueComposite) |
| { |
| // Value as parameter |
| final ValueComposite valueObject = (ValueComposite) requestObject; |
| if (request.getMethod().equals(Method.GET)) |
| { |
| StateHolder holder = spi.stateOf( valueObject ); |
| final ValueDescriptor descriptor = spi.valueDescriptorFor( valueObject ); |
| |
| final Reference ref = request.getResourceRef(); |
| ref.setQuery( null ); |
| |
| try |
| { |
| for( PropertyDescriptor propertyDescriptor : descriptor.state().properties() ) |
| { |
| Object value = holder.propertyFor( propertyDescriptor.accessor() ).get(); |
| String param; |
| if( value == null ) |
| { |
| param = null; |
| } |
| else |
| { |
| param = valueSerializer.serialize( value ); |
| } |
| ref.addQueryParameter( propertyDescriptor.qualifiedName().name(), param ); |
| } |
| } |
| catch( ValueSerializationException e ) |
| { |
| throw new ResourceException( e ); |
| } |
| } else |
| { |
| request.setEntity(new WriterRepresentation( MediaType.APPLICATION_JSON ) |
| { |
| @Override |
| public void write( Writer writer ) |
| throws IOException |
| { |
| setCharacterSet( CharacterSet.UTF_8 ); |
| valueSerializer.serialize( valueObject, new WriterOutputStream( writer ) ); |
| } |
| }); |
| } |
| |
| return true; |
| } |
| |
| return false; |
| } |
| } |