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This module provides dwr3.x support in Jawr

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/**
 * Copyright 2008 Jordi Hernández Sellés
 * 
 * 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 net.jawr.web.resource.bundle.renderer;

import org.directwebremoting.impl.DefaultSecureIdGenerator;

/**
 * This class adds a small script to pages, which is needed when integrating
 * JAWR with DWR.
 * 
 * @author Jordi Hernández Sellés
 */
public class DWRParamWriter {
	private static final DefaultSecureIdGenerator ID_GENERATOR = new DefaultSecureIdGenerator();

	private static boolean USE_DYNAMIC_SESSION_ID; // Should this evolve to an
													// interceptor chain for the
													// AbstractBundleLinkRenderer?

	/**
	 * Adds a script with DWR needed params, including a generated ID that DWR
	 * needs.
	 * 
	 * @param contextPath
	 * @param dwrPath
	 * @return
	 */
	public static StringBuffer buildRequestSpecificParams(String contextPath,
			String dwrPath) {
		StringBuffer sb = new StringBuffer(
				"").append("\n");

		return sb;
	}

	public static StringBuffer buildDWRJSParams(String contextPath,
			String dwrPath) {
		StringBuffer sb = new StringBuffer(";");
		sb.append("JAWR.jawr_dwr_path='");
		sb.append(dwrPath).append("';");

		if (USE_DYNAMIC_SESSION_ID)
			sb.append("JAWR.dwr_scriptSessionId='")
					.append(ID_GENERATOR.generate()).append("';");

		sb.append("JAWR.app_context_path='").append(contextPath).append("';");
		return sb;
	}

	/**
	 * Sets the flag indicating that we must yse the dynamic session ID
	 * 
	 * @param useDynamicSessionId
	 *            the flag to set
	 */
	public static void setUseDynamicSessionId(boolean useDynamicSessionId) {
		DWRParamWriter.USE_DYNAMIC_SESSION_ID = useDynamicSessionId;
	}

}