CustomComposer.java

/*
 * Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors.
 *
 * 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.switchyard.quickstarts.rest.binding;

import org.switchyard.Exchange;
import org.switchyard.Message;

import org.switchyard.component.common.label.EndpointLabel;
import org.switchyard.component.resteasy.composer.RESTEasyBindingData;
import org.switchyard.component.resteasy.composer.RESTEasyContextMapper;
import org.switchyard.component.resteasy.composer.RESTEasyMessageComposer;

/**
 * Composes/decomposes multiple parameter RESTEasy messages.
 *
 * @author Magesh Kumar B <mageshbk@jboss.com> (C) 2013 Red Hat Inc.
 */
public class CustomComposer extends RESTEasyMessageComposer {

    /**
     * {@inheritDoc}
     */
    @Override
    public Message compose(RESTEasyBindingData source, Exchange exchange) throws Exception {
        final Message message = super.compose(source, exchange);
        if (source.getOperationName().equals("addItem") && (source.getParameters().length == 2)) {
            // Wrap the parameters
            Item item = new Item((Integer)source.getParameters()[0], (String)source.getParameters()[1]);
            message.setContent(item);
        }
        return message;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public RESTEasyBindingData decompose(Exchange exchange, RESTEasyBindingData target) throws Exception {
        Object content = exchange.getMessage().getContent();
        String opName = exchange.getContract().getProviderOperation().getName();
        if (opName.equals("getItem") && (content == null)) {
                exchange.getContext().setProperty(RESTEasyContextMapper.HTTP_RESPONSE_STATUS, 404).addLabels(new String[]{EndpointLabel.HTTP.label()});
        }

        target = super.decompose(exchange, target);

        if (target.getOperationName().equals("addItem")
            && (content != null) && (content instanceof Item)) {
            // Unwrap the parameters
            target.setParameters(new Object[]{((Item)content).getItemId(), ((Item)content).getName()});
        }

        return target;
    }

}