selectionextractfilter.java

java编写的OCR软件

package de.spieleck.app.jacson.filter;

import de.spieleck.config.ConfigNode;
import de.spieleck.config.ConfigVerify.Acceptor;

import de.spieleck.app.jacson.JacsonException;
import de.spieleck.app.jacson.JacsonConfigException;
import de.spieleck.app.jacson.JacsonSelect;
import de.spieleck.app.jacson.JacsonRegistry;
import de.spieleck.app.jacson.SelectionResult;
import de.spieleck.app.jacson.util.ConfigUtil;

/**
 * Filter to extract a {@link JacsonSelect} from a chunk.
 * @author fsn
 */
public class SelectionExtractFilter
    extends FilterBase
    implements Acceptor
{
    protected JacsonSelect select;

    public SelectionExtractFilter()
    {
    }

    public void init(ConfigNode config, JacsonRegistry registry)
        throws JacsonConfigException
    {
        select = SelectionFilterFilter.getSelect(config, registry);
        ConfigUtil.verify(config, this);
    }

    public boolean accept(ConfigNode node)
    {
        return SelectionFilterFilter.acceptSelect(node);
    }

    public void putChunk(String chunk)
        throws JacsonException
    {
        if ( chunk == null )
            drain.putChunk(null);
        else
        {    
            select.setChunk(chunk);
            SelectionResult sr = select.getNextSelection();
            while ( sr != null )
            {
                drain.putChunk(sr.getChunk());
                sr = select.getNextSelection();
            }
        }
    }
}

//
//    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
//