com.saysth.commons.quartz.ResourceLoaderClassLoadHelper.java Source code

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Here is the source code for com.saysth.commons.quartz.ResourceLoaderClassLoadHelper.java

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/*
 * Copyright 2002-2008 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 com.saysth.commons.quartz;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.quartz.spi.ClassLoadHelper;
import org.springframework.core.io.DefaultResourceLoader;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;

/**
 * Wrapper that adapts from the Quartz {@link ClassLoadHelper} interface onto
 * Spring's {@link ResourceLoader} interface. Used by default when the
 * SchedulerFactoryBean runs in a Spring ApplicationContext.
 * 
 * @author Juergen Hoeller
 * @since 2.5.5
 * @see SchedulerFactoryBean#setApplicationContext
 */
public class ResourceLoaderClassLoadHelper implements ClassLoadHelper {

    protected static final Log logger = LogFactory.getLog(ResourceLoaderClassLoadHelper.class);

    private ResourceLoader resourceLoader;

    /**
     * Create a new ResourceLoaderClassLoadHelper for the default
     * ResourceLoader.
     * 
     * @see SchedulerFactoryBean#getConfigTimeResourceLoader()
     */
    public ResourceLoaderClassLoadHelper() {
    }

    /**
     * Create a new ResourceLoaderClassLoadHelper for the given ResourceLoader.
     * 
     * @param resourceLoader
     *            the ResourceLoader to delegate to
     */
    public ResourceLoaderClassLoadHelper(ResourceLoader resourceLoader) {
        this.resourceLoader = resourceLoader;
    }

    public void initialize() {
        if (this.resourceLoader == null) {
            this.resourceLoader = SchedulerFactoryBean.getConfigTimeResourceLoader();
            if (this.resourceLoader == null) {
                this.resourceLoader = new DefaultResourceLoader();
            }
        }
    }

    @Override
    public Class<?> loadClass(String name) throws ClassNotFoundException {
        return this.resourceLoader.getClassLoader().loadClass(name);
    }

    @SuppressWarnings("unchecked")
    @Override
    public <T> Class<? extends T> loadClass(String name, Class<T> clazz) throws ClassNotFoundException {
        Class<?> loadClass = loadClass(name);
        if (loadClass.equals(clazz)) {

        }
        return (Class<? extends T>) loadClass;
    }

    public URL getResource(String name) {
        Resource resource = this.resourceLoader.getResource(name);
        try {
            return resource.getURL();
        } catch (FileNotFoundException ex) {
            return null;
        } catch (IOException ex) {
            logger.warn("Could not load " + resource);
            return null;
        }
    }

    public InputStream getResourceAsStream(String name) {
        Resource resource = this.resourceLoader.getResource(name);
        try {
            return resource.getInputStream();
        } catch (FileNotFoundException ex) {
            return null;
        } catch (IOException ex) {
            logger.warn("Could not load " + resource);
            return null;
        }
    }

    public ClassLoader getClassLoader() {
        return this.resourceLoader.getClassLoader();
    }

}