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/*
 * 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.component.beanclass;

import java.util.Map;

import org.apache.camel.Endpoint;
import org.apache.camel.component.bean.BeanComponent;
import org.apache.camel.component.bean.BeanHolder;
import org.apache.camel.component.bean.ConstantBeanHolder;
import org.apache.camel.component.bean.ConstantTypeBeanHolder;
import org.apache.camel.component.bean.ParameterMappingStrategy;
import org.apache.camel.component.bean.ParameterMappingStrategyHelper;
import org.apache.camel.util.PropertiesHelper;

/**
 * The Class Component is for binding JavaBeans to Camel message
 * exchanges based on class name.
 * 
 * This component is an extension to the {@link org.apache.camel.component.bean.BeanComponent}.
 */
@org.apache.camel.spi.annotations.Component("class")
public class ClassComponent extends BeanComponent {

    private ParameterMappingStrategy parameterMappingStrategy;
    private BeanComponent beanComponent;

    public ClassComponent() {
    }

    @Override
    protected Endpoint createEndpoint(String uri, String remaining, Map parameters) throws Exception {
        ClassEndpoint endpoint = new ClassEndpoint(uri, this);
        endpoint.setBeanName(remaining);

        // bean name is the FQN
        String name = endpoint.getBeanName();
        Class clazz = getCamelContext().getClassResolver().resolveMandatoryClass(name);

        // the bean.xxx options is for the bean
        Map options = PropertiesHelper.extractProperties(parameters, "bean.");
        endpoint.setParameters(options);

        BeanHolder holder;

        // if there is options then we need to create a bean instance
        if (!options.isEmpty()) {
            // create bean
            Object bean = getCamelContext().getInjector().newInstance(clazz);

            // now set additional properties on it
            setProperties(bean, options);

            holder = new ConstantBeanHolder(bean, getCamelContext(), parameterMappingStrategy, beanComponent);
        } else {
            // otherwise refer to the type
            holder = new ConstantTypeBeanHolder(clazz, getCamelContext(), parameterMappingStrategy, beanComponent);
        }

        validateParameters(uri, options, null);

        // and register the bean as a holder on the endpoint
        endpoint.setBeanHolder(holder);

        return endpoint;
    }

    @Override
    protected void doInit() throws Exception {
        parameterMappingStrategy = ParameterMappingStrategyHelper.createParameterMappingStrategy(getCamelContext());
        beanComponent = getCamelContext().getComponent("bean", BeanComponent.class);
    }
}