container/webapps/admin/WEB-INF/classes/org/apache/webapp/admin/TreeControlTag.java - tomcat55 - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.
  * The ASF licenses this file to You 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 org.apache.webapp.admin;


 import java.io.IOException;
 import java.net.URLEncoder;
 import javax.servlet.http.HttpServletResponse;
 import javax.servlet.jsp.JspException;
 import javax.servlet.jsp.JspWriter;
 import javax.servlet.jsp.PageContext;
 import javax.servlet.jsp.tagext.TagSupport;


 /**
  * <p>JSP custom tag that renders a tree control represented by the
  * <code>TreeControl</code> and <code>TreeControlNode</code> classes.
  * This tag has the following user-settable attributes:</p>
  * <ul>
  * <li><strong>action</strong> - Hyperlink to which expand/contract actions
  *     should be sent, with a string "<code>{name}</code> marking where
  *     the node name of the affected node should be included.</li>
  * <li><strong>images</strong> - Name of the directory containing the images
  *     for our icons, relative to the page including this tag.  If not
  *     specified, defaults to "images".</li>
  * <li><strong>scope</strong> - Attribute scope in which the <code>tree</code>
  *     attribute is to be found (page, request, session, application).  If
  *     not specified, the attribute is searched for in all scopes.</li>
  * <li><strong>style</strong> - CSS style <code>class</code> to be applied
  *     to be applied to the entire rendered output of the tree control.
  *     If not specified, no style class is applied.</li>
  * <li><strong>styleSelected</strong> - CSS style <code>class</code> to be
  *     applied to the text of any element that is currently selected.  If not
  *     specified, no additional style class is applied.</li>
  * <li><strong>styleUnselected</strong> - CSS style <code>class</code> to be
  *     applied to the text of any element that is not currently selected.
  *     If not specified, no additional style class is applied.</li>
  * <li><strong>tree</strong> - Attribute name under which the
  *     <code>TreeControl</code> bean of the tree we are rendering
  *     is stored, in the scope specified by the <code>scope</code>
  *     attribute.  This attribute is required.</li>
  * </ul>
  *
  * <strong>FIXME</strong> - Internationalize the exception messages!
  *
  * @author Craig R. McClanahan
  * @version $Revision$ $Date$
  */

 public class TreeControlTag extends TagSupport {


     /**
      * The default directory name for icon images.
      */
     static final String DEFAULT_IMAGES = "images";


     /**
      * The names of tree state images that we need.
      */
     static final String IMAGE_HANDLE_DOWN_LAST =    "handledownlast.gif";
     static final String IMAGE_HANDLE_DOWN_MIDDLE =  "handledownmiddle.gif";
     static final String IMAGE_HANDLE_RIGHT_LAST =   "handlerightlast.gif";
     static final String IMAGE_HANDLE_RIGHT_MIDDLE = "handlerightmiddle.gif";
     static final String IMAGE_LINE_LAST =           "linelastnode.gif";
     static final String IMAGE_LINE_MIDDLE =         "linemiddlenode.gif";
     static final String IMAGE_LINE_VERTICAL =       "linevertical.gif";


     // ------------------------------------------------------------- Properties


     /**
      * The hyperlink to be used for submitting requests to expand and
      * contract tree nodes.  The placeholder "<code>{name}</code>" will
      * be replaced by the <code>name</code> property of the current
      * tree node.
      */
     protected String action = null;

     public String getAction() {
         return (this.action);
     }

     public void setAction(String action) {
         this.action = action;
     }


     /**
      * The name of the directory containing the images for our icons,
      * relative to the page including this tag.
      */
     protected String images = DEFAULT_IMAGES;

     public String getImages() {
         return (this.images);
     }

     public void setImages(String images) {
         this.images = images;
     }


     /**
      * The name of the scope in which to search for the <code>tree</code>
      * attribute.  Must be "page", "request", "session", or "application"
      * (or <code>null</code> for an ascending-visibility search).
      */
     protected String scope = null;

     public String getScope() {
         return (this.scope);
     }

     public void setScope(String scope) {
         if (!"page".equals(scope) &&
             !"request".equals(scope) &&
             !"session".equals(scope) &&
             !"application".equals(scope))
             throw new IllegalArgumentException("Invalid scope '" +
                                                scope + "'");
         this.scope = scope;
     }


     /**
      * The CSS style <code>class</code> to be applied to the entire tree.
      */
     protected String style = null;

     public String getStyle() {
         return (this.style);
     }

     public void setStyle(String style) {
         this.style = style;
     }


     /**
      * The CSS style <code>class</code> to be applied to the text
      * of selected nodes.
      */
     protected String styleSelected = null;

     public String getStyleSelected() {
         return (this.styleSelected);
     }

     public void setStyleSelected(String styleSelected) {
         this.styleSelected = styleSelected;
     }


     /**
      * The CSS style <code>class</code> to be applied to the text
      * of unselected nodes.
      */
     protected String styleUnselected = null;

     public String getStyleUnselected() {
         return (this.styleUnselected);
     }

     public void setStyleUnselected(String styleUnselected) {
         this.styleUnselected = styleUnselected;
     }


     /**
      * The name of the attribute (in the specified scope) under which our
      * <code>TreeControl</code> instance is stored.
      */
     protected String tree = null;

     public String getTree() {
         return (this.tree);
     }

     public void setTree(String tree) {
         this.tree = tree;
     }


     // --------------------------------------------------------- Public Methods


     /**
      * Render this tree control.
      *
      * @exception JspException if a processing error occurs
      */
     public int doEndTag() throws JspException {

         TreeControl treeControl = getTreeControl();
         JspWriter out = pageContext.getOut();
         try {
             out.print
                 ("<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\"");
             if (style != null) {
                 out.print(" class=\"");
                 out.print(style);
                 out.print("\"");
             }
             out.println(">");
             int level = 0;
             TreeControlNode node = treeControl.getRoot();
             render(out, node, level, treeControl.getWidth(), true);
             out.println("</table>");
         } catch (IOException e) {
             throw new JspException(e);
         }

         return (EVAL_PAGE);

     }


     /**
      * Release all state information set by this tag.
      */
     public void release() {

         this.action = null;
         this.images = DEFAULT_IMAGES;
         this.scope = null;
         this.style = null;
         this.styleSelected = null;
         this.styleUnselected = null;
         this.tree = null;

     }


     // ------------------------------------------------------ Protected Methods


     /**
      * Return the <code>TreeControl</code> instance for the tree control that
      * we are rendering.
      *
      * @exception JspException if no TreeControl instance can be found
      */
     protected TreeControl getTreeControl() throws JspException {

         Object treeControl = null;
         if (scope == null)
             treeControl = pageContext.findAttribute(tree);
         else if ("page".equals(scope))
             treeControl =
                 pageContext.getAttribute(tree, PageContext.PAGE_SCOPE);
         else if ("request".equals(scope))
             treeControl =
                 pageContext.getAttribute(tree, PageContext.REQUEST_SCOPE);
         else if ("session".equals(scope))
             treeControl =
                 pageContext.getAttribute(tree, PageContext.SESSION_SCOPE);
         else if ("application".equals(scope))
             treeControl =
                 pageContext.getAttribute(tree, PageContext.APPLICATION_SCOPE);
         if (treeControl == null)
             throw new JspException("Cannot find tree control attribute '" +
                                    tree + "'");
         else if (!(treeControl instanceof TreeControl))
             throw new JspException("Invalid tree control attribute '" +
                                    tree + "'");
         else
             return ((TreeControl) treeControl);

     }


     /**
      * Render the specified node, as controlled by the specified parameters.
      *
      * @param out The <code>JspWriter</code> to which we are writing
      * @param node The <code>TreeControlNode</code> we are currently
      *  rendering
      * @param level The indentation level of this node in the tree
      * @param width Total displayable width of the tree
      * @param last Is this the last node in a list?
      *
      * @exception IOException if an input/output error occurs
      */
     protected void render(JspWriter out, TreeControlNode node,
                           int level, int width, boolean last)
         throws IOException {

         HttpServletResponse response =
             (HttpServletResponse) pageContext.getResponse();

         // if the node is root node and the label value is
         // null, then do not render root node in the tree.

         if ("ROOT-NODE".equalsIgnoreCase(node.getName()) &&
         (node.getLabel() == null)) {
             // Render the children of this node
             TreeControlNode children[] = node.findChildren();
             int lastIndex = children.length - 1;
             int newLevel = level + 1;
             for (int i = 0; i < children.length; i++) {
                 render(out, children[i], newLevel, width, i == lastIndex);
             }
             return;
         }

         // Render the beginning of this node
         out.println("  <tr valign=\"middle\">");

         // Create the appropriate number of indents
         for (int i = 0; i < level; i++) {
             int levels = level - i;
             TreeControlNode parent = node;
             for (int j = 1; j <= levels; j++)
                 parent = parent.getParent();
             if (parent.isLast())
                 out.print("    <td></td>");
             else {
                 out.print("    <td><img src=\"");
                 out.print(images);
                 out.print("/");
                 out.print(IMAGE_LINE_VERTICAL);
                 out.print("\" alt=\"\" border=\"0\"></td>");
             }
             out.println();
         }

         // Render the tree state image for this node

         // HACK to take into account special characters like = and &
         // in the node name, could remove this code if encode URL
         // and later request.getParameter() could deal with = and &
         // character in parameter values.
         String encodedNodeName = URLEncoder.encode(node.getName(),TomcatTreeBuilder.URL_ENCODING);

         String action = replace(getAction(), "{name}", encodedNodeName);


         String updateTreeAction =
             replace(getAction(), "tree={name}", "select=" + encodedNodeName);
         updateTreeAction =
             ((HttpServletResponse) pageContext.getResponse()).
             encodeURL(updateTreeAction);

         out.print("    <td>");
         if ((action != null) && !node.isLeaf()) {
             out.print("<a href=\"");
             out.print(response.encodeURL(action));
             out.print("\">");
         }
         out.print("<img src=\"");
         out.print(images);
         out.print("/");
         if (node.isLeaf()) {
             if (node.isLast())
                 out.print(IMAGE_LINE_LAST);
             else
                 out.print(IMAGE_LINE_MIDDLE);
             out.print("\" alt=\"");
         } else if (node.isExpanded()) {
             if (node.isLast())
                 out.print(IMAGE_HANDLE_DOWN_LAST);
             else
                 out.print(IMAGE_HANDLE_DOWN_MIDDLE);
             out.print("\" alt=\"close node");
         } else {
             if (node.isLast())
                 out.print(IMAGE_HANDLE_RIGHT_LAST);
             else
                 out.print(IMAGE_HANDLE_RIGHT_MIDDLE);
             out.print("\" alt=\"expand node");
         }
         out.print("\" border=\"0\">");
         if ((action != null) && !node.isLeaf())
             out.print("</a>");
         out.println("</td>");

         // Calculate the hyperlink for this node (if any)
         String hyperlink = null;
         if (node.getAction() != null)
             hyperlink = ((HttpServletResponse) pageContext.getResponse()).
                 encodeURL(node.getAction());

         // Render the icon for this node (if any)
         out.print("    <td colspan=\"");
         out.print(width - level + 1);
         out.print("\">");
         if (node.getIcon() != null) {
             if (hyperlink != null) {
                 out.print("<a href=\"");
                 out.print(hyperlink);
                 out.print("\"");
                 String target = node.getTarget();
                 if(target != null) {
                     out.print(" target=\"");
                     out.print(target);
                     out.print("\"");
                 }
                 // to refresh the tree in the same 'self' frame
                 out.print(" onclick=\"");
                 out.print("self.location.href='" + updateTreeAction + "'");
                 out.print("\"");
                 out.print(">");
             }
             out.print("<img src=\"");
             out.print(images);
             out.print("/");
             out.print(node.getIcon());
             out.print("\" alt=\"");
             out.print("\" border=\"0\">");
             if (hyperlink != null)
                 out.print("</a>");
         }

         // Render the label for this node (if any)

         if (node.getLabel() != null) {
             String labelStyle = null;
             if (node.isSelected() && (styleSelected != null))
                 labelStyle = styleSelected;
             else if (!node.isSelected() && (styleUnselected != null))
                 labelStyle = styleUnselected;
             if (hyperlink != null) {
                 // Note the leading space so that the text has some space
                 // between it and any preceding images
                 out.print(" <a href=\"");
                 out.print(hyperlink);
                 out.print("\"");
                 String target = node.getTarget();
                 if(target != null) {
                     out.print(" target=\"");
                     out.print(target);
                     out.print("\"");
                 }
                 if (labelStyle != null) {
                     out.print(" class=\"");
                     out.print(labelStyle);
                     out.print("\"");
                 }
                 // to refresh the tree in the same 'self' frame
                 out.print(" onclick=\"");
                 out.print("self.location.href='" + updateTreeAction + "'");
                 out.print("\"");
                 out.print(">");
             } else if (labelStyle != null) {
                 out.print("<span class=\"");
                 out.print(labelStyle);
                 out.print("\">");
             }
             out.print(node.getLabel());
             if (hyperlink != null)
                 out.print("</a>");
             else if (labelStyle != null)
                 out.print("</span>");
         }
         out.println("</td>");

         // Render the end of this node
         out.println("  </tr>");

         // Render the children of this node
         if (node.isExpanded()) {
             TreeControlNode children[] = node.findChildren();
             int lastIndex = children.length - 1;
             int newLevel = level + 1;
             for (int i = 0; i < children.length; i++) {
                 render(out, children[i], newLevel, width, i == lastIndex);
             }
         }

     }


     /**
      * Replace any occurrence of the specified placeholder in the specified
      * template string with the specified replacement value.
      *
      * @param template Pattern string possibly containing the placeholder
      * @param placeholder Placeholder expression to be replaced
      * @param value Replacement value for the placeholder
      */
     protected String replace(String template, String placeholder,
                              String value) {

         if (template == null)
             return (null);
         if ((placeholder == null) || (value == null))
             return (template);
         while (true) {
             int index = template.indexOf(placeholder);
             if (index < 0)
                 break;
             StringBuffer temp = new StringBuffer(template.substring(0, index));
             temp.append(value);
             temp.append(template.substring(index + placeholder.length()));
             template = temp.toString();
         }
         return (template);

     }


 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one or more
	* contributor license agreements. See the NOTICE file distributed with
	* this work for additional information regarding copyright ownership.
	* The ASF licenses this file to You 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 org.apache.webapp.admin;


	import java.io.IOException;
	import java.net.URLEncoder;
	import javax.servlet.http.HttpServletResponse;
	import javax.servlet.jsp.JspException;
	import javax.servlet.jsp.JspWriter;
	import javax.servlet.jsp.PageContext;
	import javax.servlet.jsp.tagext.TagSupport;


	/**
	* <p>JSP custom tag that renders a tree control represented by the
	* <code>TreeControl</code> and <code>TreeControlNode</code> classes.
	* This tag has the following user-settable attributes:</p>
	* <ul>
	* <li><strong>action</strong> - Hyperlink to which expand/contract actions
	* should be sent, with a string "<code>{name}</code> marking where
	* the node name of the affected node should be included.</li>
	* <li><strong>images</strong> - Name of the directory containing the images
	* for our icons, relative to the page including this tag. If not
	* specified, defaults to "images".</li>
	* <li><strong>scope</strong> - Attribute scope in which the <code>tree</code>
	* attribute is to be found (page, request, session, application). If
	* not specified, the attribute is searched for in all scopes.</li>
	* <li><strong>style</strong> - CSS style <code>class</code> to be applied
	* to be applied to the entire rendered output of the tree control.
	* If not specified, no style class is applied.</li>
	* <li><strong>styleSelected</strong> - CSS style <code>class</code> to be
	* applied to the text of any element that is currently selected. If not
	* specified, no additional style class is applied.</li>
	* <li><strong>styleUnselected</strong> - CSS style <code>class</code> to be
	* applied to the text of any element that is not currently selected.
	* If not specified, no additional style class is applied.</li>
	* <li><strong>tree</strong> - Attribute name under which the
	* <code>TreeControl</code> bean of the tree we are rendering
	* is stored, in the scope specified by the <code>scope</code>
	* attribute. This attribute is required.</li>
	* </ul>
	*
	* <strong>FIXME</strong> - Internationalize the exception messages!
	*
	* @author Craig R. McClanahan
	* @version $Revision$ $Date$
	*/

	public class TreeControlTag extends TagSupport {


	/**
	* The default directory name for icon images.
	*/
	static final String DEFAULT_IMAGES = "images";


	/**
	* The names of tree state images that we need.
	*/
	static final String IMAGE_HANDLE_DOWN_LAST = "handledownlast.gif";
	static final String IMAGE_HANDLE_DOWN_MIDDLE = "handledownmiddle.gif";
	static final String IMAGE_HANDLE_RIGHT_LAST = "handlerightlast.gif";
	static final String IMAGE_HANDLE_RIGHT_MIDDLE = "handlerightmiddle.gif";
	static final String IMAGE_LINE_LAST = "linelastnode.gif";
	static final String IMAGE_LINE_MIDDLE = "linemiddlenode.gif";
	static final String IMAGE_LINE_VERTICAL = "linevertical.gif";


	// ------------------------------------------------------------- Properties


	/**
	* The hyperlink to be used for submitting requests to expand and
	* contract tree nodes. The placeholder "<code>{name}</code>" will
	* be replaced by the <code>name</code> property of the current
	* tree node.
	*/
	protected String action = null;

	public String getAction() {
	return (this.action);
	}

	public void setAction(String action) {
	this.action = action;
	}


	/**
	* The name of the directory containing the images for our icons,
	* relative to the page including this tag.
	*/
	protected String images = DEFAULT_IMAGES;

	public String getImages() {
	return (this.images);
	}

	public void setImages(String images) {
	this.images = images;
	}


	/**
	* The name of the scope in which to search for the <code>tree</code>
	* attribute. Must be "page", "request", "session", or "application"
	* (or <code>null</code> for an ascending-visibility search).
	*/
	protected String scope = null;

	public String getScope() {
	return (this.scope);
	}

	public void setScope(String scope) {
	if (!"page".equals(scope) &&
	!"request".equals(scope) &&
	!"session".equals(scope) &&
	!"application".equals(scope))
	throw new IllegalArgumentException("Invalid scope '" +
	scope + "'");
	this.scope = scope;
	}


	/**
	* The CSS style <code>class</code> to be applied to the entire tree.
	*/
	protected String style = null;

	public String getStyle() {
	return (this.style);
	}

	public void setStyle(String style) {
	this.style = style;
	}


	/**
	* The CSS style <code>class</code> to be applied to the text
	* of selected nodes.
	*/
	protected String styleSelected = null;

	public String getStyleSelected() {
	return (this.styleSelected);
	}

	public void setStyleSelected(String styleSelected) {
	this.styleSelected = styleSelected;
	}


	/**
	* The CSS style <code>class</code> to be applied to the text
	* of unselected nodes.
	*/
	protected String styleUnselected = null;

	public String getStyleUnselected() {
	return (this.styleUnselected);
	}

	public void setStyleUnselected(String styleUnselected) {
	this.styleUnselected = styleUnselected;
	}


	/**
	* The name of the attribute (in the specified scope) under which our
	* <code>TreeControl</code> instance is stored.
	*/
	protected String tree = null;

	public String getTree() {
	return (this.tree);
	}

	public void setTree(String tree) {
	this.tree = tree;
	}


	// --------------------------------------------------------- Public Methods


	/**
	* Render this tree control.
	*
	* @exception JspException if a processing error occurs
	*/
	public int doEndTag() throws JspException {

	TreeControl treeControl = getTreeControl();
	JspWriter out = pageContext.getOut();
	try {
	out.print
	("<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\"");
	if (style != null) {
	out.print(" class=\"");
	out.print(style);
	out.print("\"");
	}
	out.println(">");
	int level = 0;
	TreeControlNode node = treeControl.getRoot();
	render(out, node, level, treeControl.getWidth(), true);
	out.println("</table>");
	} catch (IOException e) {
	throw new JspException(e);
	}

	return (EVAL_PAGE);

	}


	/**
	* Release all state information set by this tag.
	*/
	public void release() {

	this.action = null;
	this.images = DEFAULT_IMAGES;
	this.scope = null;
	this.style = null;
	this.styleSelected = null;
	this.styleUnselected = null;
	this.tree = null;

	}


	// ------------------------------------------------------ Protected Methods


	/**
	* Return the <code>TreeControl</code> instance for the tree control that
	* we are rendering.
	*
	* @exception JspException if no TreeControl instance can be found
	*/
	protected TreeControl getTreeControl() throws JspException {

	Object treeControl = null;
	if (scope == null)
	treeControl = pageContext.findAttribute(tree);
	else if ("page".equals(scope))
	treeControl =
	pageContext.getAttribute(tree, PageContext.PAGE_SCOPE);
	else if ("request".equals(scope))
	treeControl =
	pageContext.getAttribute(tree, PageContext.REQUEST_SCOPE);
	else if ("session".equals(scope))
	treeControl =
	pageContext.getAttribute(tree, PageContext.SESSION_SCOPE);
	else if ("application".equals(scope))
	treeControl =
	pageContext.getAttribute(tree, PageContext.APPLICATION_SCOPE);
	if (treeControl == null)
	throw new JspException("Cannot find tree control attribute '" +
	tree + "'");
	else if (!(treeControl instanceof TreeControl))
	throw new JspException("Invalid tree control attribute '" +
	tree + "'");
	else
	return ((TreeControl) treeControl);

	}


	/**
	* Render the specified node, as controlled by the specified parameters.
	*
	* @param out The <code>JspWriter</code> to which we are writing
	* @param node The <code>TreeControlNode</code> we are currently
	* rendering
	* @param level The indentation level of this node in the tree
	* @param width Total displayable width of the tree
	* @param last Is this the last node in a list?
	*
	* @exception IOException if an input/output error occurs
	*/
	protected void render(JspWriter out, TreeControlNode node,
	int level, int width, boolean last)
	throws IOException {

	HttpServletResponse response =
	(HttpServletResponse) pageContext.getResponse();

	// if the node is root node and the label value is
	// null, then do not render root node in the tree.

	if ("ROOT-NODE".equalsIgnoreCase(node.getName()) &&
	(node.getLabel() == null)) {
	// Render the children of this node
	TreeControlNode children[] = node.findChildren();
	int lastIndex = children.length - 1;
	int newLevel = level + 1;
	for (int i = 0; i < children.length; i++) {
	render(out, children[i], newLevel, width, i == lastIndex);
	}
	return;
	}

	// Render the beginning of this node
	out.println(" <tr valign=\"middle\">");

	// Create the appropriate number of indents
	for (int i = 0; i < level; i++) {
	int levels = level - i;
	TreeControlNode parent = node;
	for (int j = 1; j <= levels; j++)
	parent = parent.getParent();
	if (parent.isLast())
	out.print(" <td></td>");
	else {
	out.print(" <td><img src=\"");
	out.print(images);
	out.print("/");
	out.print(IMAGE_LINE_VERTICAL);
	out.print("\" alt=\"\" border=\"0\"></td>");
	}
	out.println();
	}

	// Render the tree state image for this node

	// HACK to take into account special characters like = and &
	// in the node name, could remove this code if encode URL
	// and later request.getParameter() could deal with = and &
	// character in parameter values.
	String encodedNodeName = URLEncoder.encode(node.getName(),TomcatTreeBuilder.URL_ENCODING);

	String action = replace(getAction(), "{name}", encodedNodeName);


	String updateTreeAction =
	replace(getAction(), "tree={name}", "select=" + encodedNodeName);
	updateTreeAction =
	((HttpServletResponse) pageContext.getResponse()).
	encodeURL(updateTreeAction);

	out.print(" <td>");
	if ((action != null) && !node.isLeaf()) {
	out.print("<a href=\"");
	out.print(response.encodeURL(action));
	out.print("\">");
	}
	out.print("<img src=\"");
	out.print(images);
	out.print("/");
	if (node.isLeaf()) {
	if (node.isLast())
	out.print(IMAGE_LINE_LAST);
	else
	out.print(IMAGE_LINE_MIDDLE);
	out.print("\" alt=\"");
	} else if (node.isExpanded()) {
	if (node.isLast())
	out.print(IMAGE_HANDLE_DOWN_LAST);
	else
	out.print(IMAGE_HANDLE_DOWN_MIDDLE);
	out.print("\" alt=\"close node");
	} else {
	if (node.isLast())
	out.print(IMAGE_HANDLE_RIGHT_LAST);
	else
	out.print(IMAGE_HANDLE_RIGHT_MIDDLE);
	out.print("\" alt=\"expand node");
	}
	out.print("\" border=\"0\">");
	if ((action != null) && !node.isLeaf())
	out.print("</a>");
	out.println("</td>");

	// Calculate the hyperlink for this node (if any)
	String hyperlink = null;
	if (node.getAction() != null)
	hyperlink = ((HttpServletResponse) pageContext.getResponse()).
	encodeURL(node.getAction());

	// Render the icon for this node (if any)
	out.print(" <td colspan=\"");
	out.print(width - level + 1);
	out.print("\">");
	if (node.getIcon() != null) {
	if (hyperlink != null) {
	out.print("<a href=\"");
	out.print(hyperlink);
	out.print("\"");
	String target = node.getTarget();
	if(target != null) {
	out.print(" target=\"");
	out.print(target);
	out.print("\"");
	}
	// to refresh the tree in the same 'self' frame
	out.print(" onclick=\"");
	out.print("self.location.href='" + updateTreeAction + "'");
	out.print("\"");
	out.print(">");
	}
	out.print("<img src=\"");
	out.print(images);
	out.print("/");
	out.print(node.getIcon());
	out.print("\" alt=\"");
	out.print("\" border=\"0\">");
	if (hyperlink != null)
	out.print("</a>");
	}

	// Render the label for this node (if any)

	if (node.getLabel() != null) {
	String labelStyle = null;
	if (node.isSelected() && (styleSelected != null))
	labelStyle = styleSelected;
	else if (!node.isSelected() && (styleUnselected != null))
	labelStyle = styleUnselected;
	if (hyperlink != null) {
	// Note the leading space so that the text has some space
	// between it and any preceding images
	out.print(" <a href=\"");
	out.print(hyperlink);
	out.print("\"");
	String target = node.getTarget();
	if(target != null) {
	out.print(" target=\"");
	out.print(target);
	out.print("\"");
	}
	if (labelStyle != null) {
	out.print(" class=\"");
	out.print(labelStyle);
	out.print("\"");
	}
	// to refresh the tree in the same 'self' frame
	out.print(" onclick=\"");
	out.print("self.location.href='" + updateTreeAction + "'");
	out.print("\"");
	out.print(">");
	} else if (labelStyle != null) {
	out.print("<span class=\"");
	out.print(labelStyle);
	out.print("\">");
	}
	out.print(node.getLabel());
	if (hyperlink != null)
	out.print("</a>");
	else if (labelStyle != null)
	out.print("</span>");
	}
	out.println("</td>");

	// Render the end of this node
	out.println(" </tr>");

	// Render the children of this node
	if (node.isExpanded()) {
	TreeControlNode children[] = node.findChildren();
	int lastIndex = children.length - 1;
	int newLevel = level + 1;
	for (int i = 0; i < children.length; i++) {
	render(out, children[i], newLevel, width, i == lastIndex);
	}
	}

	}


	/**
	* Replace any occurrence of the specified placeholder in the specified
	* template string with the specified replacement value.
	*
	* @param template Pattern string possibly containing the placeholder
	* @param placeholder Placeholder expression to be replaced
	* @param value Replacement value for the placeholder
	*/
	protected String replace(String template, String placeholder,
	String value) {

	if (template == null)
	return (null);
	if ((placeholder == null) \|\| (value == null))
	return (template);
	while (true) {
	int index = template.indexOf(placeholder);
	if (index < 0)
	break;
	StringBuffer temp = new StringBuffer(template.substring(0, index));
	temp.append(value);
	temp.append(template.substring(index + placeholder.length()));
	template = temp.toString();
	}
	return (template);

	}


	}