Package io.covert.dns.extract

Source Code of io.covert.dns.extract.Extractor

/*
* 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 io.covert.dns.extract;

import java.util.Map;

import org.apache.commons.jexl2.Expression;
import org.apache.commons.jexl2.JexlEngine;
import org.apache.commons.jexl2.MapContext;

public class Extractor {
 
  final JexlEngine engine;
  final Expression expr;
 
  public Extractor(String jexlExpression)
  {
    engine = new JexlEngine();
    engine.setSilent(true);
    expr = engine.createExpression(jexlExpression);
  }
 
  public Object extract(Map<String, Object> record)
  {
    return expr.evaluate(new MapContext(record));
  }
}
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