/*
* Copyright (c) 2002-2012 Alibaba Group Holding Limited.
* All rights reserved.
*
* 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.alibaba.citrus.webx.handler;
import static com.alibaba.citrus.util.ServletUtil.*;
import java.io.IOException;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.alibaba.citrus.util.internal.webpagelite.ServletRequestContext;
import com.alibaba.citrus.webx.ResourceNotFoundException;
/**
* 这个类提供给<code>RequestHandler</code>相关的上下文信息，使<code>RequestHandler</code>和
* <code>RequestProcessor</code>整合起来。
*
* @author Michael Zhou
*/
public abstract class RequestHandlerContext extends ServletRequestContext {
private final String internalBaseURL;
/** 创建context。 */
public RequestHandlerContext(HttpServletRequest request, HttpServletResponse response,
ServletContext servletContext, String internalBaseURL, String baseURL,
String resourceName) {
super(request, response, servletContext, baseURL, resourceName);
this.internalBaseURL = internalBaseURL + '/';
}
public final void handleRequest() throws Exception {
getRequestHandler().handleRequest(this);
}
/** 取得当前调用的<code>RequestHandler</code>对象。 */
protected abstract RequestHandler getRequestHandler();
/** 当请求的资源找不到时，方法被调用。子类可以修改此行为。 */
@Override
public void resourceNotFound(String resourceName) throws IOException {
throw new ResourceNotFoundException("Resource Not Found: " + resourceName);
}
/** 取得相对于internal目录的URL。 */
public final String getInternalResourceURL(String resourceName) {
return normalizeURI(internalBaseURL + resourceName);
}
}