/*
 *  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
 *
 *    https://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.grails.plugins.web.mapping.factory;

import java.util.HashMap;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.beans.factory.config.AbstractFactoryBean;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * A factory bean that creates the URL mappings, checking if there is a bean
 * called urlMap in the ctx and merging that with the mappings set explicitly
 * on this bean.
 *
 * @author Graeme Rocher
 * @since 0.3
 */
@SuppressWarnings({"unchecked", "rawtypes"})
public class UrlMappingFactoryBean extends AbstractFactoryBean<Map> implements ApplicationContextAware {

    private static final Log LOG = LogFactory.getLog(UrlMappingFactoryBean.class);
    private static final String URL_MAP_BEAN = "urlMappings";
    private ApplicationContext applicationContext;
    private Map mappings = new HashMap();

    /* (non-Javadoc)
     * @see org.springframework.beans.factory.config.AbstractFactoryBean#createInstance()
     */
    @Override
    protected Map createInstance() {
        if (applicationContext.containsBean(UrlMappingFactoryBean.URL_MAP_BEAN)) {
            Object o = applicationContext.getBean(UrlMappingFactoryBean.URL_MAP_BEAN);
            if (o instanceof Map) {
                mappings.putAll((Map) o);
            }
        }
        if (LOG.isDebugEnabled()) {
            LOG.debug("[UrlMappingFactoryBean] Creating URL mappings as...");
            for (Object key : mappings.keySet()) {
                LOG.debug("[UrlMappingFactoryBean] " + key + "=" + mappings.get(key));
            }
        }
        return mappings;
    }

    /* (non-Javadoc)
     * @see org.springframework.beans.factory.FactoryBean#getObjectType()
     */
    @Override
    public Class<?> getObjectType() {
        return Map.class;
    }

    public void setMappings(Map mappings) {
        this.mappings = mappings;
    }

    public void setApplicationContext(ApplicationContext applicationContext) {
        this.applicationContext = applicationContext;
    }
}
