simplecontainsfilter.java

java编写的OCR软件

package de.spieleck.app.jacson.filter;

import java.util.*;

import de.spieleck.config.ConfigNode;

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

/**
 * A simple alternative to RegEXpContainsFilter, which only works for
 * fixed strings, but is somewhat faster in that case.
 * @author fsn
 */
public class SimpleContainsFilter
    extends ConstFilter
{
    /** Setup node for the pattern */
    public final static String PATTERN = "pattern";

    /** The String to find */
    protected String pattern;

    public SimpleContainsFilter()
    {
    }

    public void init(ConfigNode node, JacsonRegistry registry)
        throws JacsonConfigException
    {
        pattern = node.getString(PATTERN, null);
        if ( pattern == null )
            throw new JacsonConfigException("SimpleContainsFilter needs a pattern-config.");
        super.init(node, registry);
    }

    public boolean accept(ConfigNode node)
    {
        return super.accept(node)
            || PATTERN.equals(node.getName());
    }

    public void putChunk(String chunk)
        throws JacsonException
    {
        if ( chunk == null )
            drain.putChunk(null);
          else
        {
            if ( inverse ^ (chunk.indexOf(pattern) != -1) )
                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
//