org.xmatthew.spy2servers.config.IntegrationNamespaceHandler.java Source code

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Here is the source code for org.xmatthew.spy2servers.config.IntegrationNamespaceHandler.java

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/*
 * Copyright 2002-2006 the original author or authors.
 *
 * 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.xmatthew.spy2servers.config;

import java.io.IOException;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.xml.BeanDefinitionParser;
import org.springframework.beans.factory.xml.NamespaceHandlerSupport;
import org.springframework.core.io.support.PropertiesLoaderUtils;
import org.springframework.util.ClassUtils;
import org.xmatthew.spy2servers.component.web.config.ServerPaser;

/**
 * @Notice this source is main copied from Spring-integration project.
 * more info please see http://springframework.org/
 * Namespace handler for the integration namespace.
 * 
 * @author Mark Fisher
 * @author Marius Bogoevici
 */
public class IntegrationNamespaceHandler extends NamespaceHandlerSupport {

    private static final String ADAPTER_PARSER_MAPPINGS_LOCATION = "META-INF/spy2servers.parsers";

    private final Log logger = LogFactory.getLog(this.getClass());

    public void init() {
        Map<String, Class<? extends BeanDefinitionParser>> parserMappings = this.loadAdapterParserMappings();
        try {
            registerBeanDefinitionParser("core-component", new CoreComponentParser());
            registerBeanDefinitionParser("annotation-driven", new AnnotationDrivenParser());
            registerBeanDefinitionParser("channel", new ChannelParser());
            registerBeanDefinitionParser("jmxService-component", new JmxServiceComponentParser());

            registerBeanDefinitionParser("jetty", new ServerPaser());

            registerBeanDefinitionParser("spring-integerate-channel", new IntegrationChannelPaser());

            for (Map.Entry<String, Class<? extends BeanDefinitionParser>> entry : parserMappings.entrySet()) {
                registerBeanDefinitionParser(entry.getKey(), (BeanDefinitionParser) entry.getValue().newInstance());
            }
        } catch (Exception e) {
            throw new IllegalStateException("Failed to instantiate BeanDefinitionParser.", e);
        }
    }

    @SuppressWarnings("unchecked")
    private Map<String, Class<? extends BeanDefinitionParser>> loadAdapterParserMappings() {
        Map<String, Class<? extends BeanDefinitionParser>> parserMappings = new HashMap<String, Class<? extends BeanDefinitionParser>>();
        ClassLoader classLoader = getClass().getClassLoader();
        try {
            Properties mappings = PropertiesLoaderUtils.loadAllProperties(ADAPTER_PARSER_MAPPINGS_LOCATION,
                    classLoader);
            if (logger.isDebugEnabled()) {
                logger.debug("Loaded parser mappings [" + mappings + "]");
            }
            Enumeration<?> propertyNames = mappings.propertyNames();
            while (propertyNames.hasMoreElements()) {
                String name = (String) propertyNames.nextElement();
                String classname = mappings.getProperty(name);
                Class<?> parserClass = ClassUtils.forName(classname, classLoader);
                if (!BeanDefinitionParser.class.isAssignableFrom(parserClass)) {
                    throw new IllegalStateException("Expected class of type BeanDefinitionParser, but '" + name
                            + "' was of type '" + parserClass.getSimpleName() + "'");
                }
                parserMappings.put(name, (Class<? extends BeanDefinitionParser>) parserClass);
            }
            return parserMappings;
        } catch (IOException e) {
            throw new IllegalStateException("Unable to load BeanDefinitionParser mappings from location ["
                    + ADAPTER_PARSER_MAPPINGS_LOCATION + "]. Root cause: " + e);
        } catch (ClassNotFoundException e) {
            throw new IllegalStateException("Failed to load BeanDefinitionParser.", e);
        }
    }

}