tabletag.java

网上商店 新增功能： 1

/*
 * Copyright 2001,2004 The Apache Software Foundation.
 * 
 * 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 netstore.framework.tag;


import java.io.IOException;
import java.net.URLEncoder;
import java.util.ArrayList;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.tagext.BodyTagSupport;


/**
 * <p>JSP custom tag that renders an "instant table" control.  To the user,
 * it appears as an HTML &lt;table&gt; element
 * This tag has the following user-settable attributes:</p>
 * <ul>
 * <li><strong>columns</strong> - (Integer) number of columns in the table.
 * If not specified, one two columns will be created.</li>
 * <li><strong>table-class</strong> - The CSS style class to be applied to the
 *     entire rendered output of the entire table, if any.</li>
 * <li><strong>header-row-class</strong> - The CSS style class to be applied to the
 *     entire rendered output of the table header-row, if any.</li>
 *
 * </ul>
 *
 * <strong>FIXME</strong> - Internationalize the exception messages!
 *
 * @author Manveen Kaur
 * @version $Revision: 1.4 $ $Date: 2004/02/27 14:59:01 $
 */

public class TableTag extends BodyTagSupport {
    
    
    // ----------------------------------------------------- Manifest Constants
    
    
    /**
     * Attribute name used to indicate that we have generated the JavaScript
     * function already on the current page.  The data stored for this
     * attribute is arbitrary - only its existence is relevant.
     */
    //   protected static final String FUNCTION_TAG =
    //       "org.apache.webapp.admin.TableTag.FUNCTION_TAG";
    
    
    // ----------------------------------------------------- Instance Variables
    
    
    /**
     * The set of labels for the rows displayed by this control.
     */
    protected ArrayList labels = new ArrayList();
    
    
    /**
     * The set of datas for the rows displayed by this control.
     */
    protected ArrayList datas = new ArrayList();
    
    
    /**
     * The set of labelStyles for the rows displayed by this control.
     */
    protected ArrayList labelStyles = new ArrayList();
    
    
    /**
     * The set of dataStyles for the rows displayed by this control.
     */
    protected ArrayList dataStyles = new ArrayList();
    
    /**
     * The set of "headers" flags for rows displayed by this control.
     */
    protected ArrayList headers = new ArrayList();
    
    /**
     * The set of styleIds for the rows displayed by this control.
     */
    protected ArrayList styleIds = new ArrayList();
        
    
    // ------------------------------------------------------------- Properties
    
    
    /**
     * The number of elements that will be displayed to the user.
     */
    protected int columns = 2;
    
    public int getColumns() {
        return (this.columns);
    }
    
    public void setColumns(int columns) {
        this.columns = columns;
    }
    
    
    /**
     * The CSS style class to be applied to the entire rendered output
     * of this "instant table" object.
     */
    protected String tableStyle = null;
    
    public String getTableStyle() {
        return (this.tableStyle);
    }
    
    public void setTableStyle(String tableStyle) {
        this.tableStyle = tableStyle;
    }
    
    /**
     * The CSS Style for the lines between table rows.
     */
    protected String lineStyle = null;
    
    public String getLineStyle() {
        return (this.lineStyle);
    }
    
    public void setLineStyle(String lineStyle) {
        this.lineStyle = lineStyle;
    }
    
    // --------------------------------------------------------- Public Methods


    public int doStartTag() throws JspException {
 
        this.headers.clear();
        this.labels.clear();
        this.datas.clear();
        this.labelStyles.clear();
        this.dataStyles.clear();
        this.styleIds.clear();
        
        return (EVAL_BODY_TAG);
 
     }    

    
    /**
     * Render this instant actions control.
     *
     * @exception JspException if a processing error occurs
     */
    public int doEndTag() throws JspException {
        
        JspWriter out = pageContext.getOut();
        
        try {
            
            // Render the beginning of this element
            out.println();
            out.print("<table ");
            if (columns > 2) {
                out.print(" columns=\"");
                out.print(columns);
                out.print("\"");
            }
            if (tableStyle != null) {
                out.print(" class=\"");
                out.print(tableStyle);
                out.print("\"");
                out.print(" border=\"1\" cellspacing=\"0\" ");
                out.print(" cellpadding=\"0\" width=\"100%\" ");
            }
            out.println(">");
            
            
            // Render each defined row
            int n = labels.size();
            for (int i = 0; i < n; i++) {
                String label = (String) labels.get(i);
                boolean header = ((Boolean) headers.get(i)).booleanValue();
                String data = (String) datas.get(i);
                String labelStyle = (String) labelStyles.get(i);
                String dataStyle = (String) dataStyles.get(i);
                String styleId = (String) styleIds.get(i);
                
                if (header) {
                    out.println("<tr class=\"header-row\" >");
                    out.println("  <th scope=\"col\" width=\"27%\"> ");
                
                    out.print("    <div align=\"left\"");
                    if (labelStyle != null)
                        out.print( " class=\"" + labelStyle +"\"");
                    out.print(">");
                    if (styleId != null) {
                        out.print("<label for=\"" + styleId + "\">");
                    }
                    out.print(label);
                    if (styleId != null) {
                        out.print("</label>");
                    }
                    out.println("    </div>");
                    out.println("  </th>");
                
                    out.println("  <th scope=\"col\" width=\"73%\"> ");
                    out.print("    <div align=\"left\"" );
                    if (dataStyle != null)
                        out.print(" class=\"" + dataStyle + "\"");
                    out.print(">");
                    out.print(data);
                    out.println("    </div>");
                    out.print("  </th>");
                    out.println("</tr>");
                } else {
                    out.println("<tr>");
                
                    out.println("  <td scope=\"row\" width=\"27%\"> ");
                
                    out.print("    <div align=\"left\"");
                    if (labelStyle != null)
                        out.print( " class=\"" + labelStyle +"\"");
                    out.print(">");
                    if (styleId != null) {
                        out.print("<label for=\"" + styleId + "\">");
                    }
                    out.print(label);
                    if (styleId != null) {
                        out.print("</label>");
                    }
                    out.println("    </div>");
                    out.println("  </td>");
                
                    out.println("  <td width=\"73%\"> ");
                    out.print("    <div align=\"left\"" );
                    if (dataStyle != null)
                        out.print(" class=\"" + dataStyle + "\"");
                    out.print(">");
                    out.print(data);
                    out.println("    </div>");
                    out.print("  </td>");
                    out.println("</tr>");
                }
                
                /*
                if (!header) {
                    out.println("<tr height=\"1\">");
                    out.println("  <td class=\""+ lineStyle + "\" colspan=\"2\">");
                    out.println("    <img src=\"\" alt=\"\" width=\"1\" height=\"1\" border=\"0\">");
                    out.println("  </td>");
                    out.println("</tr>");
                }
                 */
            }
            
            // Render the end of this element
            out.println("</table>");
            out.println();
            
        } catch (IOException e) {
            throw new JspException(e);
        }
        
        return (EVAL_PAGE);
        
    }
    
    
    /**
     * Release all state information set by this tag.
     */
    public void release() {
        
        this.headers.clear();
        this.labels.clear();
        this.datas.clear();
        this.labelStyles.clear();
        this.dataStyles.clear();
        this.columns = 2;
        this.tableStyle = null;
        this.lineStyle = null;
        this.styleIds.clear();
        
    }
    
    
    // -------------------------------------------------------- Package Methods
    
    
    /**
     * Add a new Action to the set that will be rendered by this control.
     *
     * @param label Localized label visible to the user
     * @param selected Initial selected state of this option
     * @param url URL to which control should be transferred if selected
     */
    
    void addRow(boolean header, String label, String data,
    String labelStyle, String dataStyle, String styleId) {
        
        headers.add(new Boolean(header));
        labels.add(label);
        datas.add(data);
        labelStyles.add(labelStyle);
        dataStyles.add(dataStyle);
        styleIds.add(styleId);
        
    }
    
    // ------------------------------------------------------ Protected Methods
    
    
}