/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.nutch.net;
// Hadoop imports
import org.apache.hadoop.conf.Configurable;
// Nutch imports
import org.apache.nutch.plugin.Pluggable;
/**
* Interface used to limit which URLs enter Nutch.
* Used by the injector and the db updater.
*/
public interface URLFilter extends Pluggable, Configurable {
/** The name of the extension point. */
public final static String X_POINT_ID = URLFilter.class.getName();
/* Interface for a filter that transforms a URL: it can pass the
original URL through or "delete" the URL by returning null */
public String filter(String urlString);
}