/*
* 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.piggybank.storage;
import java.util.regex.Pattern;
/*
* MyRegExLoader extends RegExLoader, allowing regular expressions to be passed by argument through pig latin
* via a line like
*
* A = LOAD 'file:test.txt' USING org.apache.pig.piggybank.storage.MyRegExLoader('(\\d+)!+(\\w+)~+(\\w+)');
*
* which would parse lines like
*
* 1!!!one~i 2!!two~~ii 3!three~~~iii
*
* into arrays like
*
* {1, "one", "i"}, {2, "two", "ii"}, {3, "three", "iii"}
*/
public class MyRegExLoader extends RegExLoader {
Pattern pattern = null;
public MyRegExLoader(String pattern) {
pattern = pattern.replace("\\\\","\\");
this.pattern = Pattern.compile(pattern);
}
@Override
public Pattern getPattern() {
return pattern;
}
}