// HTMLParser Library $Name: v1_6 $ - A java-based parser for HTML// http://sourceforge.org/projects/htmlparser// Copyright (C) 2005 Derrick Oswald//// Revision Control Information//// $Source: /cvsroot/htmlparser/htmlparser/src/org/htmlparser/parserapplications/filterbuilder/wrappers/NodeClassFilterWrapper.java,v $// $Author: derrickoswald $// $Date: 2005/04/12 11:27:42 $// $Revision: 1.2 $//// This library is free software; you can redistribute it and/or// modify it under the terms of the GNU Lesser General Public// License as published by the Free Software Foundation; either// version 2.1 of the License, or (at your option) any later version.//// This library 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. See the GNU// Lesser General Public License for more details.//// You should have received a copy of the GNU Lesser General Public// License along with this library; if not, write to the Free Software// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA//package org.htmlparser.parserapplications.filterbuilder.wrappers;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.util.Iterator;import java.util.Set;import javax.swing.JComboBox;//import javax.swing.event.DocumentEvent;//import javax.swing.event.DocumentListener;//import javax.swing.text.BadLocationException;//import javax.swing.text.Document;import org.htmlparser.Node;import org.htmlparser.NodeFactory;import org.htmlparser.NodeFilter;import org.htmlparser.Parser;import org.htmlparser.PrototypicalNodeFactory;import org.htmlparser.Tag;import org.htmlparser.filters.NodeClassFilter;import org.htmlparser.parserapplications.filterbuilder.Filter;/** * Wrapper for NodeClassFilters. */public class NodeClassFilterWrapper    extends        Filter    implements        ActionListener//        ,//        DocumentListener{    /**     * The underlying filter.     */    protected NodeClassFilter mFilter;    /**     * Combo box for strategy.     */    protected JComboBox mClass;    /**     * Create a wrapper over a new NodeClassFilter.     */     public NodeClassFilterWrapper ()    {        mFilter = new NodeClassFilter ();        // add the strategy choice        mClass = new JComboBox ();        mClass.addItem ("");        add (mClass);        mClass.addActionListener (this);    }    //    // Filter overrides and concrete implementations    //    /**     * Get the name of the filter.     * @return A descriptive name for the filter.     */    public String getDescription ()    {        return ("Nodes of class");    }    /**     * Get the resource name for the icon.     * @return The icon resource specification.     */    public String getIconSpec ()    {        return ("images/NodeClassFilter.gif");    }    /**     * Get the underlying node filter object.     * @return The node filter object suitable for serialization.     */    public NodeFilter getNodeFilter ()    {        NodeClassFilter ret;                ret = new NodeClassFilter ();        ret.setMatchClass (mFilter.getMatchClass ());                    return (ret);    }    /**     * Assign the underlying node filter for this wrapper.     * @param filter The filter to wrap.     * @param context The parser to use for conditioning this filter.     * Some filters need contextual information to provide to the user,     * i.e. for tag names or attribute names or values,     * so the Parser context is provided.      */    public void setNodeFilter (NodeFilter filter, Parser context)    {        NodeFactory factory;        PrototypicalNodeFactory proto;        Set names;        String name;        Tag tag;        mFilter = (NodeClassFilter)filter;        factory = context.getNodeFactory ();        if (factory instanceof PrototypicalNodeFactory)        {            proto = (PrototypicalNodeFactory)factory;            // iterate over the classes            names = proto.getTagNames ();            for (Iterator iterator = names.iterator (); iterator.hasNext (); )            {                name = (String)iterator.next ();                tag = proto.get (name);                mClass.addItem (tag.getClass ().getName ());            }        }        mClass.setSelectedItem (mFilter.getMatchClass ().getName ());    }    /**     * Get the underlying node filter's subordinate filters.     * @return The node filter object's contained filters.     */    public NodeFilter[] getSubNodeFilters ()    {        return (new NodeFilter[0]);    }    /**     * Assign the underlying node filter's subordinate filters.     * @param filters The filters to insert into the underlying node filter.     */    public void setSubNodeFilters (NodeFilter[] filters)    {        // should we complain?    }    /**     * Convert this filter into Java code.     * Output whatever text necessary and return the variable name.     * @param out The output buffer.     * @param context Three integers as follows:     * <li>indent level - the number of spaces to insert at the beginning of each line</li>     * <li>filter number - the next available filter number</li>     * <li>filter array number - the next available array of filters number</li>     * @return The variable name to use when referencing this filter (usually "filter" + context[1]++)      */    public String toJavaCode (StringBuffer out, int[] context)    {        String ret;        ret = "filter" + context[1]++;        spaces (out, context[0]);        out.append ("NodeClassFilter ");        out.append (ret);        out.append (" = new NodeClassFilter ();");        newline (out);        spaces (out, context[0]);        out.append ("try { ");        out.append (ret);        out.append (".setMatchClass (Class.forName (\"");        out.append (mFilter.getMatchClass ().getName ());        out.append ("\")); } catch (ClassNotFoundException cnfe) { cnfe.printStackTrace (); }");        newline (out);                return (ret);    }    //    // NodeFilter interface    //    /**     * Predicate to determine whether or not to keep the given node.     * The behaviour based on this outcome is determined by the context     * in which it is called. It may lead to the node being added to a list     * or printed out. See the calling routine for details.     * @return <code>true</code> if the node is to be kept, <code>false</code>     * if it is to be discarded.     * @param node The node to test.     */    public boolean accept (Node node)    {        return (mFilter.accept (node));    }    //    // ActionListener interface    //    /**     * Invoked when an action occurs on the combo box.     * @param event Details about the action event.     */    public void actionPerformed (ActionEvent event)    {        Object source;        source = event.getSource ();        if (source == mClass)            try            {                mFilter.setMatchClass (Class.forName ((String)mClass.getSelectedItem ()));            }            catch (ClassNotFoundException cnfe)            {                cnfe.printStackTrace ();            }    }//    ////    // DocumentListener interface//    //////    public void insertUpdate (DocumentEvent e)//    {//        Document doc;//        //        doc = e.getDocument ();//        try//        {//            mFilter.setPattern (doc.getText (0, doc.getLength ()));//        }//        catch (BadLocationException ble)//        {//            ble.printStackTrace ();//        }//    }////    public void removeUpdate (DocumentEvent e)//    {//        Document doc;//        //        doc = e.getDocument ();//        try//        {//            mFilter.setPattern (doc.getText (0, doc.getLength ()));//        }//        catch (BadLocationException ble)//        {//            ble.printStackTrace ();//        }//    }////    public void changedUpdate (DocumentEvent e)//    {//        // plain text components don't fire these events//    }}