package com.efsol.friki;

import java.io.Reader;
import java.io.Writer;
import java.io.IOException;

import org.stringtree.factory.StringFetcher;
import org.stringtree.util.ReaderUtils;
import org.stringtree.util.StringUtils;

public abstract class TransformFilter 
	implements ContentFilter
{
	protected StringFetcher converter;
	
	public void filter(Reader reader, Writer out)
		throws IOException
	{
		String content = ReaderUtils.readReader(reader);
		content = converter.get(content);
		out.write(StringUtils.nullToEmpty(content));
	}

	public String makeLinkSource(String name)
	{
		return name;	
	}

	protected void setConverter(StringFetcher fetcher)
	{
		this.converter = fetcher;
	}
}