/*
    * Copyright 2004-2006 the Seasar Foundation and the Others.
    *
    * 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.isenshi.util.extlib;
  
  import java.io.IOException;
  import java.io.StringWriter;
  import java.io.Writer;
  import java.util.Enumeration;
  
  import javax.servlet.Servlet;
  import javax.servlet.ServletConfig;
  import javax.servlet.ServletContext;
  import javax.servlet.ServletException;
  import javax.servlet.ServletRequest;
  import javax.servlet.ServletResponse;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpSession;
  import javax.servlet.jsp.JspException;
  import javax.servlet.jsp.JspWriter;
  import javax.servlet.jsp.PageContext;
  import javax.servlet.jsp.el.ExpressionEvaluator;
  import javax.servlet.jsp.el.VariableResolver;
  
  import org.apache.struts.taglib.html.JavascriptValidatorTag;
  
  /***
   * @author nishioka
   */
  public class JavascriptValidatorUtils {
  
  
  
  	public static String getScript(Servlet servlet, ServletRequest request,
  			ServletResponse response, String formName)
  			throws IllegalStateException, IllegalArgumentException,
  			IOException, JspException {
  
  		StringWriter writer = new StringWriter();
  
  		PageContext pageContext = new PageContextImpl(writer);
  		pageContext.initialize(servlet, request, response, "", false, 0, false);
  		// pageContext.setContext(context);
  
  		JavascriptValidatorTag tag = new JavascriptValidatorTag();
  		tag.setFormName(formName);
  		tag.setPageContext(pageContext);
  
  		tag.doStartTag();
  
  		String ret = writer.toString();
  
  		return ret;
  	}
  
  	public static class JspWriterImpl extends JspWriter {
  
  		private static final String SEP = System.getProperty("line.separator");
  
  		private Writer writer;
  
  		public JspWriterImpl(Writer writer, int buffSize, boolean autoFlash) {
  			super(buffSize, autoFlash);
  			this.writer = writer;
  		}
  
  		public void newLine() throws IOException {
  			writer.write(SEP);
  		}
  
  		public void print(boolean b) throws IOException {
  			write(Boolean.toString(b));
  		}
  
  		public void print(char c) throws IOException {
  			write(Character.toString(c));
  		}
  
  		public void print(int i) throws IOException {
  			write(Integer.toString(i));
  		}
  
  		public void print(long l) throws IOException {
  			write(Long.toString(l));
  		}
  
  		public void print(float f) throws IOException {
 			write(java.lang.Float.toString(f));
 		}
 
 		public void print(double d) throws IOException {
 			write(Double.toString(d));
 		}
 
 		public void print(char[] s) throws IOException {
 			write(s);
 		}
 
 		public void print(String s) throws IOException {
 			write(s);
 		}
 
 		public void print(Object obj) throws IOException {
 			write(String.valueOf(obj));
 		}
 
 		public void println() throws IOException {
 			newLine();
 		}
 
 		public void println(boolean x) throws IOException {
 			print(x);
 			newLine();
 		}
 
 		public void println(char x) throws IOException {
 			print(x);
 			newLine();
 		}
 
 		public void println(int x) throws IOException {
 			print(x);
 			newLine();
 		}
 
 		public void println(long x) throws IOException {
 			print(x);
 			newLine();
 		}
 
 		public void println(float x) throws IOException {
 			print(x);
 			newLine();
 		}
 
 		public void println(double x) throws IOException {
 			print(x);
 			newLine();
 		}
 
 		public void println(char[] x) throws IOException {
 			print(x);
 			newLine();
 		}
 
 		public void println(String x) throws IOException {
 			print(x);
 			newLine();
 		}
 
 		public void println(Object x) throws IOException {
 			print(x);
 			newLine();
 		}
 
 		public void clear() throws IOException {
 			// TODO Auto-generated method stub
 
 		}
 
 		public void clearBuffer() throws IOException {
 			// TODO Auto-generated method stub
 
 		}
 
 		public void flush() throws IOException {
 			// TODO Auto-generated method stub
 
 		}
 
 		public void close() throws IOException {
 			// TODO Auto-generated method stub
 
 		}
 
 		public int getRemaining() {
 			// TODO Auto-generated method stub
 			return 0;
 		}
 
 		public void write(char[] cbuf, int off, int len) throws IOException {
 			writer.write(cbuf, off, len);
 		}
 	}
 
 	public static class PageContextImpl extends PageContext {
 
 		private ServletContext context_;
 
 		private ServletRequest request;
 
 		private ServletResponse response;
 
 		private Writer writer;
 
 		private JspWriter jspWriter;
 
 		public PageContextImpl(Writer writer) {
 			this.writer = writer;
 		}
 
 		public void initialize(Servlet servlet, ServletRequest arg1,
 				ServletResponse arg2, String arg3, boolean arg4, int buffSize,
 				boolean autoFlash) throws IOException, IllegalStateException,
 				IllegalArgumentException {
 
 			this.context_ = servlet.getServletConfig().getServletContext();
 
 			// this.context_ = context;
 			this.request = arg1;
 			this.response = arg2;
 
 			this.jspWriter = new JspWriterImpl(writer, buffSize, autoFlash);
 
 			response.getClass();
 		}
 
 		public void release() {
 		}
 
 		public HttpSession getSession() {
 			return null;
 		}
 
 		public Object getPage() {
 			return null;
 		}
 
 		public ServletRequest getRequest() {
 			return this.request;
 		}
 
 		public ServletResponse getResponse() {
 			return null;
 		}
 
 		public Exception getException() {
 			return null;
 		}
 
 		public ServletConfig getServletConfig() {
 			return null;
 		}
 
 		public ServletContext getServletContext() {
 			return null;
 		}
 
 		public void forward(String arg0) throws ServletException, IOException {
 		}
 
 		public void include(String arg0) throws ServletException, IOException {
 		}
 
 		public void include(String arg0, boolean arg1) throws ServletException,
 				IOException {
 		}
 
 		public void handlePageException(Exception arg0)
 				throws ServletException, IOException {
 		}
 
 		public void handlePageException(Throwable arg0)
 				throws ServletException, IOException {
 		}
 
 		public void setAttribute(String arg0, Object arg1) {
 		}
 
 		public void setAttribute(String arg0, Object arg1, int arg2) {
 		}
 
 		public Object getAttribute(String arg0) {
 			return null;
 		}
 
 		public Object getAttribute(String name, int scope) {
 
 			switch (scope) {
 			case PAGE_SCOPE:
 				return null;
 
 			case REQUEST_SCOPE:
 				return this.request.getAttribute(name);
 
 			case SESSION_SCOPE:
 				return ((HttpServletRequest) request).getSession()
 						.getAttribute(name);
 
 			case APPLICATION_SCOPE:
 				return context_.getAttribute(name);
 
 			default:
 				throw new IllegalArgumentException("Invalid scope");
 			}
 
 		}
 
 		public Object findAttribute(String arg0) {
 			return null;
 		}
 
 		public void removeAttribute(String arg0) {
 		}
 
 		public void removeAttribute(String arg0, int arg1) {
 		}
 
 		public int getAttributesScope(String arg0) {
 			return 0;
 		}
 
 		public Enumeration getAttributeNamesInScope(int arg0) {
 			return null;
 		}
 
 		public JspWriter getOut() {
 			return jspWriter;
 		}
 
 		public ExpressionEvaluator getExpressionEvaluator() {
 			return null;
 		}
 
 		public VariableResolver getVariableResolver() {
 			return null;
 		}
 	}
 
 }