[Htmlparser-cvs] htmlparser/src/org/htmlparser/filters LinkRegexFilter.java,NONE,1.1 LinkStringFilter.java,NONE,1.1

[Derrick O. <der...@us...>]

Update of /cvsroot/htmlparser/htmlparser/src/org/htmlparser/filters
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv23052/src/org/htmlparser/filters

Added Files:
	LinkRegexFilter.java LinkStringFilter.java 
Log Message:
Add link pattern filters submitted by John Derrick.

--- NEW FILE: LinkStringFilter.java ---
// HTMLParser Library $Name:  $ - A java-based parser for HTML
// http://sourceforge.org/projects/htmlparser
// Copyright (C) 2005 John Derrick
//
// Revision Control Information
//
// $Source: /cvsroot/htmlparser/htmlparser/src/org/htmlparser/filters/LinkStringFilter.java,v $
// $Author: derrickoswald $
// $Date: 2005/04/06 10:20:23 $
// $Revision: 1.1 $
//
// 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.filters;

import org.htmlparser.Node;
import org.htmlparser.NodeFilter;
import org.htmlparser.tags.LinkTag;

/**
 * This class accepts tags of class LinkTag that contain a link matching a given
 * pattern string. Use this filter to extract LinkTag nodes with URLs containing
 * the desired string.
 */
public class LinkStringFilter implements NodeFilter
{
    protected String mPattern;
    protected boolean mCaseSensitive;
    
    /**
     * Creates a new instance of LinkStringFilter that accepts LinkTag nodes containing
     * a URL that matches the supplied pattern. The match is case insensitive.
     * @param pattern The pattern to match.
     */
    public LinkStringFilter (String pattern)
    {
        this (pattern, false);
    }
    
    /**
     * Creates a new instance of LinkStringFilter that accepts LinkTag nodes containing
     * a URL that matches the supplied pattern.
     * @param pattern The pattern to match.
     * @param caseSensitive Specifies case sensitivity for the matching process.
     */
    public LinkStringFilter (String pattern, boolean caseSensitive)
    {
        mPattern = pattern;
        mCaseSensitive = caseSensitive;
    }
    
    /**
     * Accept nodes that are assignable from the LinkTag class and have a URL that
     * matches the pattern supplied in the constructor.
     * @param node The node to check.
     * @return <code>true</code> if the node is a link with the pattern.
     */
    public boolean accept (Node node)
    {
        boolean ret;
        
        ret = false;
        if (LinkTag.class.isAssignableFrom (node.getClass ()))
        {
            String link = ((LinkTag)node).getLink ();
            if (mCaseSensitive)
            {
                if (link.indexOf (mPattern) > -1)
                    ret = true;
            }
            else
            {
                if (link.toUpperCase ().indexOf (mPattern.toUpperCase ()) > -1)
                    ret = true;
            }
        }

        return (ret);
    }
}

--- NEW FILE: LinkRegexFilter.java ---
// HTMLParser Library $Name:  $ - A java-based parser for HTML
// http://sourceforge.org/projects/htmlparser
// Copyright (C) 2005 John Derrick
//
// Revision Control Information
//
// $Source: /cvsroot/htmlparser/htmlparser/src/org/htmlparser/filters/LinkRegexFilter.java,v $
// $Author: derrickoswald $
// $Date: 2005/04/06 10:20:23 $
// $Revision: 1.1 $
//
// 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.filters;

import java.util.regex.*;

import org.htmlparser.Node;
import org.htmlparser.NodeFilter;
import org.htmlparser.tags.LinkTag;

/**
 * This class accepts tags of class LinkTag that contain a link matching a given
 * regex pattern. Use this filter to extract LinkTag nodes with URLs that match
 * the desired regex pattern.
 */
public class LinkRegexFilter implements NodeFilter
{
    protected Pattern mRegex;
    
    /**
     * Creates a new instance of LinkRegexFilter that accepts LinkTag nodes containing
     * a URL that matches the supplied regex pattern. The match is case insensitive.
     * @param regexPattern The pattern to match.
     */
    public LinkRegexFilter (String regexPattern) throws Exception
    {
        this (regexPattern, true);
    }
    
    /**
     * Creates a new instance of LinkRegexFilter that accepts LinkTag nodes containing
     * a URL that matches the supplied regex pattern.
     * @param regexPattern The regex pattern to match.
     * @param caseSensitive Specifies case sensitivity for the matching process.
     */
    public LinkRegexFilter (String regexPattern, boolean caseSensitive) throws Exception
    {
        if (caseSensitive)
            mRegex = Pattern.compile (regexPattern);
        else
            mRegex = Pattern.compile (regexPattern, Pattern.CASE_INSENSITIVE);
    }
    
    /**
     * Accept nodes that are assignable from the LinkTag class and have a URL that
     * matches the regex pattern supplied in the constructor.
     * @param node The node to check.
     * @return <code>true</code> if the node is a link with the pattern.
     */
    public boolean accept (Node node)
    {
        boolean ret;
        
        ret = false;
        if (LinkTag.class.isAssignableFrom (node.getClass ()))
        {
            String link = ((LinkTag)node).getLink ();
            Matcher matcher = mRegex.matcher (link);
            ret = matcher.find ();
        }

        return (ret);
    }
}