padfilter.java.org

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.JacsonRegistry;
import de.spieleck.app.jacson.util.ConfigUtil;

/**
 * Filter to pad a chunk. That is the chunk gets 
 * a prefix and postfix attached.
 * @author fsn
 */
public class PadFilter
    extends FilterBase
    implements Acceptor
{
    public final static String PRE_NODE = "pre";
    public final static String POST_NODE = "post";

    protected String pre, post;

    public void init(ConfigNode config, JacsonRegistry registry)
        throws JacsonConfigException
    {
        pre = config.getString(PRE_NODE, "");
        post = config.getString(POST_NODE, "");
        if ( "".equals(pre) && "".equals(post) )
            throw new JacsonConfigException("PadFilter needs pre and or post data.");
        ConfigUtil.verify(config, this);
    }

    public boolean accept(ConfigNode node)
    {
        String name = node.getName();
        return PRE_NODE.equals(name)
            || POST_NODE.equals(name);
    }

    public void putChunk(String chunk)
        throws JacsonException
    {
        if ( chunk == null )
        {
            drain.putChunk(chunk);
        }
        else 
        {
            drain.putChunk(pre+chunk+post);
        }
    }
}
//
//    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
//