// HTMLParser Library $Name: v1_6_20060319 $ - 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/NotFilterWrapper.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 org.htmlparser.Node;import org.htmlparser.NodeFilter;import org.htmlparser.Parser;import org.htmlparser.filters.NotFilter;import org.htmlparser.parserapplications.filterbuilder.Filter;import org.htmlparser.parserapplications.filterbuilder.SubFilterList;/** * Wrapper for NotFilters. */public class NotFilterWrapper    extends        Filter{    /**     * The drop target container.     */    protected SubFilterList mContainer;        /**     * The underlying filter.     */    protected NotFilter mFilter;    /**     * Create a wrapper over a new NotFilter.     */     public NotFilterWrapper ()    {        mFilter = new NotFilter ();        // add the subfilter container        mContainer = new SubFilterList (this, "Predicate", 1);        add (mContainer);    }    //    // Filter overrides and concrete implementations    //        /**     * Get the name of the filter.     * @return A descriptive name for the filter.     */    public String getDescription ()    {        return ("Not");    }    /**     * Get the resource name for the icon.     * @return The icon resource specification.     */    public String getIconSpec ()    {        return ("images/NotFilter.gif");    }    /**     * Get the underlying node filter object.     * @return The node filter object suitable for serialization.     */    public NodeFilter getNodeFilter ()    {        NodeFilter predicate;        NotFilter ret;                ret = new NotFilter ();        predicate = mFilter.getPredicate ();        if (null != predicate)            ret.setPredicate (((Filter)predicate).getNodeFilter ());                    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)    {        mFilter = (NotFilter)filter;    }    /**     * Get the underlying node filter's subordinate filters.     * @return The node filter object's contained filters.     */    public NodeFilter[] getSubNodeFilters ()    {        NodeFilter predicate;        NodeFilter[] ret;        predicate = mFilter.getPredicate ();        if (null != predicate)            ret = new NodeFilter[] { predicate };        else            ret = new NodeFilter[0];        return (ret);    }    /**     * Assign the underlying node filter's subordinate filters.     * @param filters The filters to insert into the underlying node filter.     */    public void setSubNodeFilters (NodeFilter[] filters)    {        if (0 != filters.length)            mFilter.setPredicate (filters[0]);        else            mFilter.setPredicate (null);    }    /**     * 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 name;        String ret;        if (null != mFilter.getPredicate ())            name = ((Filter)mFilter.getPredicate ()).toJavaCode (out, context);        else            name = null;        ret = "filter" + context[1]++;        spaces (out, context[0]);        out.append ("NotFilter ");        out.append (ret);        out.append (" = new NotFilter ();");        newline (out);        if (null != name)        {            spaces (out, context[0]);            out.append (ret);            out.append (".setPredicate (");            out.append (name);            out.append (");");            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));    }}