Package org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.regex

Source Code of org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.regex.CompiledAutomaton

/*
* 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.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.regex;

import dk.brics.automaton.Automaton;
import dk.brics.automaton.RegExp;
import dk.brics.automaton.RunAutomaton;

public class CompiledAutomaton implements RegexImpl {

    private RunAutomaton runauto = null;
   
    public CompiledAutomaton( String rhsPattern ) {
        RegExp regexpr = new dk.brics.automaton.RegExp(rhsPattern);
        Automaton auto = regexpr.toAutomaton();
        this.runauto = new RunAutomaton(auto, true);
    }
   
    @Override
    public boolean match(String lhs, String rhs) {
        return this.runauto.run(lhs);
    }

}
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