/*
 * $Id$
 *
 * 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.struts2.views.velocity;

import com.opensymphony.xwork2.util.ClassLoaderUtil;
import org.apache.velocity.exception.ResourceNotFoundException;
import org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader;

import java.io.InputStream;


/**
 * Loads resource from the Thread's context ClassLoader.
 *
 */
public class StrutsResourceLoader extends ClasspathResourceLoader {

    public synchronized InputStream getResourceStream(String name) throws ResourceNotFoundException {
        if ((name == null) || (name.length() == 0)) {
            throw new ResourceNotFoundException("No template name provided");
        }

        if (name.startsWith("/")) {
            name = name.substring(1);
        }

        try {
            return ClassLoaderUtil.getResourceAsStream(name, StrutsResourceLoader.class);
        } catch (Exception e) {
            throw new ResourceNotFoundException(e);
        }
    }
}