package com.heaton.bot.catbot;import java.util.*;import com.heaton.bot.*;/** * The link recognizer is used to search for a specific * text or graphic link on the page. To locate this link * the recognizer uses ALT tags, the text linked, and * even the HREF itself to establish the identity of * the link. * * @author Jeff Heaton * @version 1.0 */public class RecognizeLink extends Recognize{  /**   * The string that is being searched for.   */  String _search;  /**   * The HREF found in the target link.   */  String _targetHREF;  /**   * The constructor. Pass the controller on   * to the parent.   *   * @param controller   */  public RecognizeLink(CatBot controller)  {    super(controller);  }  /**   * Returns true if the link has already been   * recognized.   *   * @return True if the link has already been recognized.   */  public boolean isRecognized()  {    return(_targetHREF!=null);  }  /**   * Returns the search string being used to find   * the link.   *   * @return The search string being used to find the   * link.   */  public String getSearch()  {    return _search;  }  /**   * Sets the search string being used to find the link.   *   * @param s The search string being used to find the link.   */  public void setSearch(String s)  {    _search = s.toUpperCase();  }  /**   * Returns true if this page can be recognized.   *   * @param page The page to look at.   * @return True if this page can be recognized.   */  public boolean isRecognizable(HTMLPage page)  {    for(Enumeration e = page.getLinks().elements() ; e.hasMoreElements() ;)    {      Link link = (Link)e.nextElement();      String alt = link.getALT();      String href = link.getHREF();      String prompt = link.getPrompt();      if(prompt==null)        prompt="";      if(alt==null)        alt="";      if(href==null)        continue;      if( ( alt.toUpperCase().indexOf(_search)!=-1) ||          ( prompt.toUpperCase().indexOf(_search)!=-1) ||          ( href.toUpperCase().indexOf(_search)!=-1) )      {        _targetHREF = link.getHREF();        Log.log(Log.LOG_LEVEL_NORMAL,"Recognized a link:" + _search);        return true;      }    }    return false;  }  /**   * The internal perform of this class will scan   * all forms of links on the page searching for   * the text specified by the setSearch method.   *   * @param page The page to look at.   * @return True if successful.   * @exception java.io.IOException   * @exception javax.swing.text.BadLocationException   */  protected boolean internalPerform(HTMLPage page)    throws java.io.IOException,      javax.swing.text.BadLocationException  {    if(_targetHREF!=null)    {      page.open(_targetHREF,null);      return true;    }    else return false;  }}