Jetty example source code file (FrameSet.java)

This example Jetty source code file (FrameSet.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Jetty tags/keywords

enumeration, frame, frame, frameset, frameset, hashtable, hashtable, io, ioexception, page, string, string, util, vector

The Jetty FrameSet.java source code

// ========================================================================
// $Id: FrameSet.java,v 1.4 2004/11/20 13:32:33 gregwilkins Exp $
// Copyright 1996-2004 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// 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 org.mortbay.html;
import java.io.IOException;
import java.io.Writer;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;

/* ---------------------------------------------------------------- */
/** FrameSet.
 * <p>
 * Usage
 * <pre>
 *      FrameSet set = new FrameSet("FrameTest","*,*","*,*");
 *      set.frame(0,0).name("Frame1",req.getRequestPath()+"?Frame=1");
 *      set.frame(0,1).name("Frame2",req.getRequestPath()+"?Frame=2");
 *      set.frame(1,0).name("Frame3",req.getRequestPath()+"?Frame=3");
 *      set.frame(1,1).name("Frame4",req.getRequestPath()+"?Frame=4");
 *      set.write(new Writer(res.getOutputStream()));
 * </pre>
 * @version $Id: FrameSet.java,v 1.4 2004/11/20 13:32:33 gregwilkins Exp $
 * @author Greg Wilkins
*/
public class FrameSet extends Page
{
    Frame[][] frames=null;
    String colSpec=null;
    String rowSpec=null;
    int cols;
    int rows;
    String border="";
    Vector frameNames=null;
    Hashtable frameMap=null;
    
    /* ------------------------------------------------------------ */
    /** FrameSet constructor.
     * @param colSpec Comma separated list of column widths specified
     *                as pixels, percentage or '*' for variable
     */
    public FrameSet(String title, String colSpec, String rowSpec)
    {
        super(title);

        this.colSpec=colSpec;
        this.rowSpec=rowSpec;
        
        cols=1;
        rows=1;

        int i=-1;
        while(colSpec != null && (i=colSpec.indexOf(",",i+1))>=0)
            cols++;
        
        i=-1;
        while(rowSpec != null && (i=rowSpec.indexOf(",",i+1))>=0)
            rows++;
        
        frames=new Frame[cols][rows];
        for(int c=0;c<cols;c++)
            for(int r=0;r<rows;r++)
                frames[c][r]=new Frame();
    }
    
    /* ------------------------------------------------------------ */
    public Frame frame(int col, int row)
    {
        return frames[col][row];
    }

    /* ------------------------------------------------------------ */
    public FrameSet border(boolean threeD, int width, String color)
    {
        border=" frameborder=\""+(threeD?"yes":"no")+"\"";
        if (width>=0)
            border+=" border=\""+width+"\"";

        if (color!=null)
            border+=" bordercolor=\""+color+"\"";
        return this;
    }
    
    /* ----------------------------------------------------------------- */
    public Enumeration namedFrames()
    {
        if (frameNames==null)
            return new Vector().elements();
        return frameNames.elements();
    }
    
    /* ----------------------------------------------------------------- */
    public Frame frame(String name)
    {
        if (frameMap==null)
            return null;
        return (Frame) frameMap.get(name);
    }
    
    /* ----------------------------------------------------------------- */
    /** Name a frame.
     * By convention, frame names match Page section names
     */
    public Frame nameFrame(String name,int col, int row)
    {
        if (frameMap==null)
        {
            frameMap=new Hashtable(10);
            frameNames=new Vector(10);
        }
        
        Frame frame = frames[col][row];
        if (frame==null)
            frame = frames[col][row] = new Frame();
        
        if (frameMap.get(name)==null)
            frameNames.addElement(name);
        frameMap.put(name,frame);
        frame.name(name);

        return frame;
    }
    
    
    /* ----------------------------------------------------------------- */
    public void write(Writer out)
         throws IOException
    {
        writeHtmlHead(out);
        
        out.write("<frameset "+border);
        
        if(colSpec!=null)
            out.write(" cols=\""+colSpec+"\"");
        if(rowSpec!=null)
            out.write(" rows=\""+rowSpec+"\"");
        out.write(">");

        for(int r=0;r<rows;r++)
            for(int c=0;c<cols;c++)
                frames[c][r].write(out);

        out.write("<noframes>");
        writeElements(out);
        out.write("</noframes>");

        out.write("</frameset>");
        out.write("</html>");
    }
};