/*
* 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.test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.lang.reflect.Method;
import java.util.Random;
import java.util.regex.Pattern;
import org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.PORegexp;
import org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.regex.CompiledAutomaton;
import org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.regex.CompiledRegex;
import org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.regex.NonConstantRegex;
import org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.regex.RegexInit;
import org.apache.pig.impl.plan.OperatorKey;
import org.junit.Test;
public class TestPORegexp {
static Random r = new Random(42L);
@Test
public void testOrdering() {
CompiledAutomaton auto2 = new CompiledAutomaton("[a-z]{3}");
assertFalse(auto2.match("1234", "abc") );
assertTrue(auto2.match("abc", "1234") );
auto2 = new CompiledAutomaton(".*#c");
assertTrue(auto2.match("ab#c", "dummy"));
auto2 = new CompiledAutomaton(".*@.*");
assertTrue(auto2.match("ab@c", "dummy"));
auto2 = new CompiledAutomaton("abc&def");
assertTrue(auto2.match("abc&def", "dummy"));
auto2 = new CompiledAutomaton("abc~[ab]");
assertTrue(auto2.match("abc~a", "dummy"));
CompiledRegex regex2 = new CompiledRegex(Pattern.compile("[a-z]{3}"));
assertFalse(regex2.match("1234", "abc") );
assertTrue(regex2.match("abc", "1234") );
NonConstantRegex ncr = new NonConstantRegex();
assertFalse(ncr.match("1234", "abc"));
assertFalse(ncr.match("abc", "1234"));
assertTrue(ncr.match("1234", "\\d\\d\\d\\d"));
assertTrue(ncr.match("abc", "[a-z]{3}"));
}
@Test
public void testRegexDetermination() throws Exception {
Method m = RegexInit.class.getDeclaredMethod("determineBestRegexMethod", String.class);
m.setAccessible(true);
RegexInit regex = new RegexInit(new PORegexp(new OperatorKey()));
assertEquals(1, m.invoke(regex, "abc") );
assertEquals(1, m.invoke(regex, "\\\\abc") );
assertEquals(1, m.invoke(regex, "abc.*"));
assertEquals(1, m.invoke(regex, ".*abc"));
assertEquals(1, m.invoke(regex, ".*abc.*"));
assertEquals(1, m.invoke(regex, ".*abc\\.*"));
assertEquals(1, m.invoke(regex, ".*abc\\\\"));
assertEquals(0, m.invoke(regex, ".*abc\\d"));
assertEquals(0, m.invoke(regex, ".*abc\\s"));
assertEquals(0, m.invoke(regex, ".*abc\\Sw"));
assertEquals(0, m.invoke(regex, "abc\\Sw"));
assertEquals(0, m.invoke(regex, "a\\Q"));
assertEquals(0, m.invoke(regex, "\\QThis is something"));
assertEquals(0, m.invoke(regex, "(\\w)*\\s\\1"));
assertEquals(0, m.invoke(regex, "[^a]bc"));
assertEquals(0, m.invoke(regex, "\\p{Alpha}hi"));
assertEquals(0, m.invoke(regex, "\\d{1,2}hi"));
assertEquals(0, m.invoke(regex, "^abc.*"));
assertEquals(1, m.invoke(regex, ".*[A-F]{2,3}.*"));
assertEquals(0, m.invoke(regex, "\\d+"));
assertEquals(0, m.invoke(regex, "\\d{2,3}"));
assertEquals(0, m.invoke(regex, "\\\\\\d{2,3}"));
assertEquals(0, m.invoke(regex, ".*\\d{2,3}.*"));
assertEquals(0, m.invoke(regex, "\\d\\.0\\d"));
assertEquals(0, m.invoke(regex, "[^f]ed.*"));
assertEquals(0, m.invoke(regex, "[a-m[n-z]]"));
assertEquals(0, m.invoke(regex, "[a-z&&[def]]"));
assertEquals(0, m.invoke(regex, "[a-z&&[^abc]]"));
assertEquals(1, m.invoke(regex, "[a-m\\[n-z\\]"));
assertEquals(1, m.invoke(regex, "[a-m\\\\\\[n-z\\\\\\]]"));
assertEquals(0, m.invoke(regex, "[a-m\\\\\\[n-z\\\\\\][0-9]]"));
assertEquals(0, m.invoke(regex, "[a-m\\\\[n-z]]"));
assertEquals(0, m.invoke(regex, "\\\\\\[[a-m\\\\\\[n-z\\\\\\][0-9]]"));
assertEquals(0, m.invoke(regex, "[a-z]??" ));
assertEquals(0, m.invoke(regex, "[a-z]*?" ));
assertEquals(0, m.invoke(regex, "[a-z]+?" ));
assertEquals(0, m.invoke(regex, "[a-z]{4}?" ));
assertEquals(0, m.invoke(regex, "[a-z]{2,4}?" ));
assertEquals(1, m.invoke(regex, "[a-z]\\??" ));
assertEquals(1, m.invoke(regex, "[a-z]\\*?" ));
assertEquals(1, m.invoke(regex, "[a-z]\\+?" ));
assertEquals(1, m.invoke(regex, "[a-z]{4\\}?" ));
assertEquals(1, m.invoke(regex, "[a-z]{2,4\\}?" ));
assertEquals(0, m.invoke(regex, "[a-z]?+" ));
assertEquals(0, m.invoke(regex, "[a-z]*+" ));
assertEquals(0, m.invoke(regex, "[a-z]++" ));
assertEquals(0, m.invoke(regex, "[a-z]{4}+" ));
assertEquals(0, m.invoke(regex, "[a-z]{2,4}+" ));
assertEquals(1, m.invoke(regex, "[a-z]\\?+" ));
assertEquals(1, m.invoke(regex, "[a-z]\\*+" ));
assertEquals(1, m.invoke(regex, "[a-z]\\++" ));
assertEquals(1, m.invoke(regex, "[a-z]{4\\}+" ));
assertEquals(1, m.invoke(regex, "[a-z]{2,4\\}+" ));
assertEquals(1, m.invoke(regex, "[a-m\\[n-z\\]]" ));
assertEquals(0, m.invoke(regex, "\\0101" ));
assertEquals(0, m.invoke(regex, "\\x0A" ));
assertEquals(0, m.invoke(regex, "\\u000A" ));
assertEquals(0, m.invoke(regex, "&&" ));
assertEquals(1, m.invoke(regex, "\\&&asdkfjalsdf" ));
assertEquals(0, m.invoke(regex, "&&asdf\\&&" ));
assertEquals(0, m.invoke(regex, "&&asdf\\&&asdfasdf" ));
assertEquals(0, m.invoke(regex, "&&asdfas\\&&asdfasdfa\\&&" ));
assertEquals(0, m.invoke(regex, "&&asdflj&&" ));
assertEquals(0, m.invoke(regex, "\\\\&&asdfasdf" ));
assertEquals(1, m.invoke(regex, "\\\\\\&&asdfasdf" ));
assertEquals(0, m.invoke(regex, "\\\\&&asdfasdf&&" ));
assertEquals(0, m.invoke(regex, "\\&&asdfasdf\\\\&&" ));
assertEquals(0, m.invoke(regex, "\\&&asd&&fasdf\\\\\\&&" ));
assertEquals(0, m.invoke(regex, "\\dasdfasdf" ));
assertEquals(1, m.invoke(regex, "\\\\dasdfasdf" ));
assertEquals(0, m.invoke(regex, "\\\\dasdfasdf\\d" ));
assertEquals(0, m.invoke(regex, "\\\\dasdf\\dasdf\\\\d" ));
assertEquals(0, m.invoke(regex, "\\\\dasd\\\\dfasdf\\d" ));
assertEquals(1, m.invoke(regex, "\\\\dasdfasdf\\" ));
assertEquals(0, m.invoke(regex, "\\dasase\\\\dfasdf\\" ));
assertEquals(1, m.invoke(regex, "\\\\dasdfasdf\\\\" ));
assertEquals(1, m.invoke(regex, "xyz#abc") );
}
}