com.clican.pluto.common.resource.ClassPathResource.java Source code

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Here is the source code for com.clican.pluto.common.resource.ClassPathResource.java

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/**
 * The Clican-Pluto software suit is Copyright 2009, Clican Company and individual contributors, and is licensed under the GNU LGPL.
 *
 * @author wei.zhang
 *
 */
package com.clican.pluto.common.resource;

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

import org.apache.commons.lang.StringUtils;

/**
 * This class<code>ClassPathResource</code> represents 
 * the class path resource whose path starts with "classpath:".
 * @author wei.zhang
 *
 */
public class ClassPathResource implements Resource {

    public final static String CLASS_PATH_RESOURCE_PREFIX = "classpath:";

    private String classPath;

    private URL resource;

    public ClassPathResource(String classPath) {
        if (StringUtils.isEmpty(classPath)) {
            throw new IllegalArgumentException("classPath cannot be null");
        }
        if (!classPath.startsWith(CLASS_PATH_RESOURCE_PREFIX)) {
            this.classPath = classPath;
        } else {
            this.classPath = classPath.substring(CLASS_PATH_RESOURCE_PREFIX.length());
        }
        resource = Thread.currentThread().getContextClassLoader().getResource(this.classPath);
        if (resource == null) {
            throw new IllegalArgumentException("resource cannot be found");
        }
    }

    public InputStream getInputStream() throws FileNotFoundException {
        try {
            InputStream is = resource.openStream();
            return is;
        } catch (Exception e) {
            throw new FileNotFoundException(e.getMessage());
        }
    }

    public OutputStream getOutputStream() throws FileNotFoundException {
        throw new FileNotFoundException("Classpath resourceOutputStream");
    }

}

// $Id$