regexpcontainsfilter.java

java编写的OCR软件

package de.spieleck.app.jacson.filter;

import java.util.*;

import org.apache.oro.text.regex.*;

import de.spieleck.config.ConfigNode;

import de.spieleck.app.jacson.JacsonConfigException;
import de.spieleck.app.jacson.JacsonException;
import de.spieleck.app.jacson.JacsonRegistry;
import de.spieleck.app.jacson.util.RegExpUtil;

/**
 * Regexp based Filter for {@link de.spieleck.app.jacson.Jacson}. 
 * Only lets through chunks that match (nomatch with inverse)
 * the given regexp.
 * @author fsn
 */
public class RegExpContainsFilter
    extends ConstFilter
{
    /** oro-Regexp-Pattern */
    protected Pattern pattern;

    protected RegExpUtil rutil;

    public RegExpContainsFilter()
    {
    }

    public void init(ConfigNode node, JacsonRegistry registry)
        throws JacsonConfigException
    {
        rutil = registry.getRegExpUtil();
        pattern = rutil.obtainPattern("RegExpContainsFilter", node, registry);
        super.init(node, registry);
    }

    public boolean accept(ConfigNode node)
    {
        return super.accept(node)
            || rutil.accept(node);
    }

    public void putChunk(String chunk)
        throws JacsonException
    {
        if ( chunk == null )
            drain.putChunk(null);
          else
        {
            PatternMatcher matcher = rutil.getMatcher();
            if ( matcher.contains(chunk, pattern) ^ inverse )
                drain.putChunk(chunk);
        }
    }
}
//
//    Jacson - Text Filtering with Java.
//    Copyright (C) 2002 Frank S. Nestel (nestefan -at- users.sourceforge.net)
//
//    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
//