/*
* 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.assertTrue;
import java.io.File;
import java.io.FileWriter;
import java.util.Iterator;
import java.util.Properties;
import org.apache.pig.ExecType;
import org.apache.pig.PigServer;
import org.apache.pig.builtin.PigStorage;
import org.apache.pig.data.Tuple;
import org.apache.pig.impl.io.FileLocalizer;
import org.apache.pig.impl.util.UDFContext;
import org.junit.Test;
public class TestUDFContext {
@Test
public void testUDFContext() throws Exception {
File a = Util.createLocalInputFile("a.txt", new String[] { "dumb" });
File b = Util.createLocalInputFile("b.txt", new String[] { "dumber" });
FileLocalizer.deleteTempFiles();
PigServer pig = new PigServer(ExecType.LOCAL, new Properties());
String[] statement = { "A = LOAD '" + Util.encodeEscape(a.getAbsolutePath()) +
"' USING org.apache.pig.test.utils.UDFContextTestLoader('joe');",
"B = LOAD '" + Util.encodeEscape(b.getAbsolutePath()) +
"' USING org.apache.pig.test.utils.UDFContextTestLoader('jane');",
"C = union A, B;",
"D = FOREACH C GENERATE $0, $1, org.apache.pig.test.utils.UDFContextTestEvalFunc($0), " +
"org.apache.pig.test.utils.UDFContextTestEvalFunc2($0);" };
File tmpFile = File.createTempFile("temp_jira_851", ".pig");
FileWriter writer = new FileWriter(tmpFile);
for (String line : statement) {
writer.write(line + "\n");
}
writer.close();
pig.registerScript(tmpFile.getAbsolutePath());
Iterator<Tuple> iterator = pig.openIterator("D");
while (iterator.hasNext()) {
Tuple tuple = iterator.next();
if ("dumb".equals(tuple.get(0).toString())) {
assertEquals(tuple.get(1).toString(), "joe");
} else if ("dumber".equals(tuple.get(0).toString())) {
assertEquals(tuple.get(1).toString(), "jane");
}
assertEquals(Integer.valueOf(tuple.get(2).toString()), new Integer(5));
assertEquals(tuple.get(3).toString(), "five");
}
}
/**
* Test that UDFContext is reset each time the plan is regenerated
* @throws Exception
*/
@Test
public void testUDFContextReset() throws Exception {
PigServer pig = new PigServer(ExecType.LOCAL);
pig.registerQuery(" l = load 'file' as (a :int, b : int, c : int);");
pig.registerQuery(" f = foreach l generate a, b;");
pig.explain("f", System.out);
Properties props = UDFContext.getUDFContext().getUDFProperties(PigStorage.class);
// required fields property should be set because f results does not
// require the third column c, so properties should not be null
assertTrue(
"properties in udf context for load should not be empty: "+props,
props.keySet().size()>0);
// the new statement for alias f below will require all columns,
// so this time required fields property for loader should not be set
pig.registerQuery(" f = foreach l generate a, b, c;");
pig.explain("f", System.out);
props = UDFContext.getUDFContext().getUDFProperties(PigStorage.class);
assertTrue(
"properties in udf context for load should be empty: "+props,
props.keySet().size() == 0);
}
}