flow4jtagsupport.java

一个java写的business process management系统

/*
 * Copyright (c) 2003-2004, Alexander Greif
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Flow4J-Eclipse project nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package net.orthanc.flow4j.runtime.web.taglib;

import java.util.Enumeration;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.tagext.TagSupport;

/**
 * Class Flow4JTagSupport TODO
 * @author agreif
 * 
 */
public class Flow4JTagSupport extends TagSupport {

	protected void log(String msg) {
		getServletContext().log(msg);
	}
	
	protected void log(String msg, Throwable t) {
		getServletContext().log(msg, t);
	}





	protected ServletContext getServletContext() {
		return pageContext.getServletContext();
	}

	protected ServletConfig getServletConfig() {
		return pageContext.getServletConfig();
	}






	protected String getInitParameter(String name, int scope) {
		switch(scope) {
			case PageContext.PAGE_SCOPE:
					return getServletConfig().getInitParameter(name);
					
			case PageContext.APPLICATION_SCOPE:
					return getServletContext().getInitParameter(name);
					
			default:
					throw new IllegalArgumentException("Illegal scope");
		}
	}
	

	protected Enumeration getInitParameterNamesForScope(int scope) {
		switch(scope) {
			case PageContext.PAGE_SCOPE:
					return getServletConfig().getInitParameterNames();
					
			case PageContext.APPLICATION_SCOPE:
					return getServletContext().getInitParameterNames();
					
			default:
					throw new IllegalArgumentException("Illegal scope");
		}
	}


	protected String getInitParameter(String name) {
		return getInitParameter(name, PageContext.APPLICATION_SCOPE);
	}
	

	protected Enumeration getInitParameterNames() {
		return getInitParameterNamesForScope(PageContext.APPLICATION_SCOPE);
	}


/*
	void writeHtml(JspWriter out, String html) throws IOException {
		html = Util.replaceString(html, "<", "&lt;");
		html = Util.replaceString(html, ">", "&gt;");
		html = Util.replaceString(html, "&", "&amp;");
		
		out.print(html);
	}
*/
	protected HttpServletResponse getHttpServletResponse() {
		return (HttpServletResponse)pageContext.getResponse();
	}




	/**
	 * TODO
	 * 
	 */
	protected void clearProperties () {
	}
	
	/**
	 * TODO
	 * 
	 */
	protected void clearServiceState () {
	}

}