| /* |
| * 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 java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.PrintStream; |
| import java.util.Iterator; |
| |
| import org.apache.pig.Algebraic; |
| import org.apache.pig.EvalFunc; |
| import org.apache.pig.ExecType; |
| import org.apache.pig.PigServer; |
| import org.apache.pig.backend.executionengine.ExecException; |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.data.TupleFactory; |
| import org.junit.AfterClass; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| public class TestAlgebraicInstantiation { |
| |
| Boolean[] nullFlags = new Boolean[]{ false, true}; |
| static MiniGenericCluster cluster = MiniGenericCluster.buildCluster(); |
| private PigServer pig; |
| private File tmpFile; |
| |
| public TestAlgebraicInstantiation() throws ExecException { |
| pig = new PigServer(ExecType.MAPREDUCE, cluster.getProperties()); |
| } |
| |
| @Before |
| public void setUp() throws Exception { |
| tmpFile = File.createTempFile("test", "txt"); |
| PrintStream ps = new PrintStream(new FileOutputStream(tmpFile)); |
| ps.println("1\t2"); |
| ps.close(); |
| } |
| |
| @AfterClass |
| public static void tearDownAfterClass() throws Exception { |
| cluster.shutDown(); |
| } |
| |
| @Test |
| public void testAlgebraicInstantiation() throws IOException { |
| pig.registerQuery("a = group (load '" |
| + Util.generateURI(tmpFile.toString(), pig.getPigContext()) + "') by ($0);"); |
| pig.registerQuery("b = foreach a generate org.apache.pig.test.TestAlgebraicInstantiation$AlgInstUDF($1.$1);"); |
| Iterator<Tuple> tupIter = pig.openIterator("b"); |
| assertEquals("no-args", tupIter.next().toDelimitedString(",")); |
| pig.registerQuery("DEFINE instantiated org.apache.pig.test.TestAlgebraicInstantiation$AlgInstUDF('args');"); |
| pig.registerQuery("b = foreach a generate instantiated($1.$1);"); |
| tupIter = pig.openIterator("b"); |
| assertEquals("args", tupIter.next().toDelimitedString(",")); |
| } |
| |
| @Test |
| public void testRegularInstantiation() throws IOException { |
| pig.registerQuery("a = group (load '" |
| + Util.generateURI(tmpFile.toString(), pig.getPigContext()) + "') by ($0);"); |
| pig.registerQuery("b = foreach a generate org.apache.pig.test.TestAlgebraicInstantiation$ParamUDF($1.$1);"); |
| Iterator<Tuple> tupIter = pig.openIterator("b"); |
| assertEquals("no-args", tupIter.next().toDelimitedString(",")); |
| pig.registerQuery("DEFINE instantiated org.apache.pig.test.TestAlgebraicInstantiation$ParamUDF('args');"); |
| pig.registerQuery("b = foreach a generate instantiated($1.$1);"); |
| tupIter = pig.openIterator("b"); |
| assertEquals("args", tupIter.next().toDelimitedString(",")); |
| } |
| |
| public static class ParamUDF extends EvalFunc<String> { |
| private String initType; |
| |
| public ParamUDF() { |
| initType = "no-args"; |
| } |
| public ParamUDF(String s) { |
| initType = s; |
| } |
| |
| @Override |
| public String exec(Tuple input) { |
| return initType; |
| } |
| } |
| |
| public static class AlgInstUDF extends EvalFunc<String> implements Algebraic { |
| |
| private String initType; |
| |
| public AlgInstUDF() { |
| initType = "no-args"; |
| } |
| |
| public AlgInstUDF(String s) { |
| initType = s; |
| } |
| |
| @Override |
| public String exec(Tuple input) throws IOException { |
| // TODO Auto-generated method stub |
| return initType; |
| } |
| |
| @Override |
| public String getFinal() { |
| return Final.class.getName(); |
| } |
| |
| @Override |
| public String getInitial() { |
| return Initial.class.getName(); |
| } |
| |
| @Override |
| public String getIntermed() { |
| return Intermed.class.getName(); |
| } |
| |
| public static class Initial extends EvalFunc<Tuple> { |
| |
| private String initType; |
| |
| public Initial() { |
| initType = "no-args"; |
| } |
| |
| public Initial(String s) { |
| initType = s; |
| } |
| |
| @Override |
| public Tuple exec(Tuple input) { |
| return TupleFactory.getInstance().newTuple(initType); |
| } |
| } |
| |
| public static class Intermed extends EvalFunc<Tuple> { |
| |
| private String initType; |
| |
| public Intermed() { |
| initType = "no-args"; |
| } |
| |
| public Intermed(String s) { |
| initType = s; |
| } |
| |
| @Override |
| public Tuple exec(Tuple input) { |
| return TupleFactory.getInstance().newTuple(initType); |
| } |
| } |
| |
| public static class Final extends EvalFunc<String> { |
| |
| private String initType; |
| |
| public Final() { |
| initType = "no-args"; |
| } |
| |
| public Final(String s) { |
| initType = s; |
| } |
| |
| @Override |
| public String exec(Tuple input) { |
| return initType; |
| } |
| } |
| } |
| } |