gt:       generateSetOrRemove(out, _var, _scope, messageVar);
context: /*
   * Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
   *
   * This file is part of Resin(R) Open Source
   *
   * Each copy or derived work must preserve the copyright notice and this
   * notice unmodified.
   *
   * Resin Open Source is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * Resin Open Source is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
   * of NON-INFRINGEMENT.  See the GNU General Public License for more
   * details.
   *
   * You should have received a copy of the GNU General Public License
   * along with Resin Open Source; if not, write to the
   *   Free SoftwareFoundation, Inc.
   *   59 Temple Place, Suite 330
   *   Boston, MA 02111-1307  USA
   *
   * @author Scott Ferguson
   */
  
  package com.caucho.jsp.java;
  
  import com.caucho.jsp.JspParseException;
  import com.caucho.vfs.WriteStream;
  import com.caucho.xml.QName;
  
  import java.io.IOException;
  import java.util.ArrayList;
  
  public class JstlFmtMessage extends JstlNode {
    private static final QName KEY = new QName("key");
    private static final QName BUNDLE = new QName("bundle");
    private static final QName VAR = new QName("var");
    private static final QName SCOPE = new QName("scope");
    
    private String _key;
    private JspAttribute _keyAttr;
    
    private String _bundle;
    private JspAttribute _bundleAttr;
    
    private String _var;
    private String _scope;
  
    private ArrayList<JstlFmtParam> _params = new ArrayList<JstlFmtParam>();
    
    /**
     * Adds an attribute.
     */
    public void addAttribute(QName name, String value)
      throws JspParseException
    {
      if (KEY.equals(name))
        _key = value;
      else if (BUNDLE.equals(name))
        _bundle = value;
      else if (VAR.equals(name))
        _var = value;
      else if (SCOPE.equals(name))
        _scope = value;
      else
        throw error(L.l("`{0}' is an unknown attribute for <{1}>.",
                        name.getName(), getTagName()));
    }
    
    /**
     * Adds an attribute.
     */
    public void addAttribute(QName name, JspAttribute value)
      throws JspParseException
    {
      if (KEY.equals(name))
        _keyAttr = value;
      else if (BUNDLE.equals(name))
        _bundleAttr = value;
      else
        throw error(L.l("`{0}' is an unsupported jsp:attribute for <{1}>.",
                        name.getName(), getTagName()));
    }
  
    /**
     * Adds a child element.
     */
    public void addChild(JspNode node)
      throws JspParseException
    {
      if (node instanceof JstlFmtParam)
        _params.add((JstlFmtParam) node);
      else
        super.addChild(node);
    }
  
    @Override
    public boolean hasCustomTag()
    {
      if (super.hasCustomTag())
        return true;
  
      for (JstlFmtParam param : _params) {
        if (param.hasCustomTag())
          return true;
      }
  
      return false;
    }
  
    /**
     * Generates the XML text representation for the tag validation.
     *
     * @param os write stream to the generated XML.
     */
    public void printXml(WriteStream os)
      throws IOException
    {
      os.print("<fmt:message");
  
      if (_key != null) {
        os.print(" key=\"" + xmlText(_key) + "\"");
      }
  
      if (_bundle != null)
        os.print(" bundle=\"" + xmlText(_bundle) + "\"");
      
      if (_var != null)
        os.print(" var=\"" + _var + "\"");
      
      if (_scope != null)
        os.print(" scope=\"" + _scope + "\"");
  
      os.print(">");
  
      for (int i = 0; i < _params.size(); i++)
        _params.get(i).printXml(os);
  
      printXmlChildren(os);
  
      os.print("</fmt:message>");
    }
  
    /**
     * Generates the code for the fmt:message tag.
     */
    @Override
    public void generatePrologue(JspJavaWriter out)
      throws Exception
    {
      for (int i = 0; i < _params.size(); i++) {
        _params.get(i).generatePrologue(out);
      }
    }
  
    /**
     * Generates the code for the fmt:message tag.
     */
    @Override
    public void generateTagState(JspJavaWriter out)
      throws Exception
    {
      for (int i = 0; i < _params.size(); i++) {
        _params.get(i).generateTagState(out);
      }
    }
  
    /**
     * Generates the code for the fmt:message tag.
     */
    public void generate(JspJavaWriter out)
      throws Exception
    {
      String keyExpr = null;
  
      if (_key != null) {
        keyExpr = generateValue(String.class, _key);
      }
      else if (_keyAttr != null) {
        keyExpr = _keyAttr.generateValue();
      }
      else if (isChildrenStatic()) {
        keyExpr = '"' + escapeJavaString(getStaticText().trim()) + '"';
      }
      else {
        out.println("out = pageContext.pushBody();");
  
        generateChildren(out);
  
        keyExpr = "_caucho_var_" + _gen.uniqueId();
  
        out.println("String " + keyExpr + " = ((com.caucho.jsp.BodyContentImpl) out).getTrimString();");
  
        out.println("out = pageContext.popBody();");
      }
  
      // see if there's a fmt:bundle with a prefix
  
      String prefix = "";
      JspNode node;
  
      // jsp/1c51, jsp/1c54
      /*
      for (node = getParent(); node != null; node = node.getParent()) {
        if (node instanceof JstlFmtBundle) {
          prefix = ((JstlFmtBundle) node).getPrefixCode();
          break;
        }
      }
      */
  
      String paramVar = "null";
  
      if (_params.size() > 0) {
        paramVar = "_caucho_param_" + _gen.uniqueId();
  
        out.println("Object []" + paramVar + " = new Object[" + _params.size() + "];");
  
        for (int i = 0; i < _params.size(); i++) {
          JstlFmtParam param = _params.get(i);
  
          param.generateSet(out, paramVar + "[" + i + "]");
  
          /*
          String value = param.getAttribute("value");
  
          if (! value.equals("")) {
            int paramIndex = _gen.addExpr(value);
  
            out.println(paramVar + "[" + i + "] = _caucho_expr_" + paramIndex + ".evalObject(pageContext);");
          }
          else {
            out.println("out = pageContext.pushBody();");
  
            _gen.generateChildren(param.getFirstChild());
  
            out.println(paramVar + "[" + i + "] = ((com.caucho.jsp.BodyContentImpl) out).getTrimString();");
  
            out.println("out = pageContext.popBody();");
          }
          */
        }
      }
  
  
      String locObjVar = "_caucho_loc_object_" + _gen.uniqueId();
      out.println("Object " + locObjVar + ";");
  
      if (_bundleAttr != null) {
        out.println(locObjVar + " = " + _bundleAttr.generateValue() + ";");
      } else if (_bundle != null) {
        out.println(locObjVar + " = " + generateValue(Object.class, _bundle) + ";");
      } else {
        out.println(locObjVar + " = " + "(javax.servlet.jsp.jstl.fmt.LocalizationContext) pageContext.getAttribute(\"caucho.bundle\");");
      }
  
      String locCtxVar = "_caucho_loc_ctx_" + _gen.uniqueId();
      out.println("javax.servlet.jsp.jstl.fmt.LocalizationContext " + locCtxVar + ";");
  
      out.println("if (" + locObjVar + " instanceof javax.servlet.jsp.jstl.fmt.LocalizationContext)");
      out.pushDepth();
      out.println(locCtxVar + " = (javax.servlet.jsp.jstl.fmt.LocalizationContext)" + locObjVar + ";");
      out.popDepth();
  
      out.println(" else if (" + locObjVar + " instanceof String)");
      out.pushDepth();
      out.println(locCtxVar + " = pageContext.getBundle((String)" + locObjVar + ");");
      out.popDepth();
  
      out.println("else");
      out.pushDepth();
      out.println(locCtxVar + " = null;");
      out.popDepth();
  
      out.println();
  
      String messageVar = "_caucho_message_" + _gen.uniqueId();
      out.println("String " + messageVar + ";");
  
      out.println("if (" + locCtxVar + " != null) {");
      out.pushDepth();
  
  
      String localeVar = "_caucho_locale_" + _gen.uniqueId();
      out.println("java.util.Locale " + localeVar + "= " + locCtxVar + ".getLocale();");
      out.println("if (" + localeVar + " != null)");
      out.pushDepth();
      out.println("com.caucho.jstl.rt.I18NSupport.setResponseLocale(pageContext, " + localeVar + ");");
      out.popDepth();
      out.println(messageVar + " = " + "pageContext.getLocalizedMessage(" +
                  locCtxVar + ", " + prefix + keyExpr + ", " + paramVar + ", null);");
  
      out.popDepth();
      out.println("}");
      out.println("else {");
      out.pushDepth();
      out.println(messageVar + " = " + "pageContext.getLocalizedMessage(null, "
                  + prefix + keyExpr + ", " + paramVar + ", null);");
      out.popDepth();
      out.println("}");
  
      out.println();
      if (_var != null) {
  