| /* |
| * 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.*; |
| import java.io.IOException; |
| |
| import org.apache.pig.EvalFunc; |
| import org.apache.pig.builtin.OutputSchema; |
| import org.apache.pig.data.DataBag; |
| import org.apache.pig.data.DataType; |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.impl.logicalLayer.FrontendException; |
| import org.apache.pig.impl.logicalLayer.schema.Schema; |
| import org.apache.pig.impl.logicalLayer.schema.Schema.FieldSchema; |
| import org.junit.Test; |
| |
| import com.google.common.collect.Lists; |
| |
| public class TestEvalFuncOutputAnnotation { |
| |
| @OutputSchema("foo:chararray") |
| public static class AnnotatedFunc extends EvalFunc<String> { |
| @Override |
| public String exec(Tuple input) throws IOException { |
| return null; |
| } |
| } |
| |
| @OutputSchema("foo:chararray") |
| public static class OverriddenFunc extends EvalFunc<String> { |
| @Override |
| public String exec(Tuple input) throws IOException { |
| return null; |
| } |
| @Override |
| public Schema outputSchema(Schema input) { |
| return new Schema(new FieldSchema("bar", DataType.CHARARRAY)); |
| } |
| } |
| |
| // This would give the same result: "y:bag{tuple(len:int,word:chararray)}" |
| @OutputSchema("y:bag{(len:int,word:chararray)}") |
| public static class ComplexFunc extends EvalFunc<DataBag> { |
| @Override |
| public DataBag exec(Tuple input) throws IOException { |
| return null; |
| } |
| } |
| |
| public static class UnannotatedFunc extends EvalFunc<DataBag> { |
| @Override |
| public DataBag exec(Tuple input) throws IOException { |
| return null; |
| } |
| } |
| |
| @Test |
| public void testSimpleAnnotation() { |
| EvalFunc<String> myFunc =new AnnotatedFunc(); |
| Schema s = new Schema(new FieldSchema("foo", DataType.CHARARRAY)); |
| assertEquals(s, myFunc.outputSchema(null)); |
| } |
| |
| @Test |
| public void testOverriddenAnnotation() { |
| EvalFunc<String> myFunc =new OverriddenFunc(); |
| Schema s = new Schema(new FieldSchema("bar", DataType.CHARARRAY)); |
| assertEquals(s, myFunc.outputSchema(null)); |
| } |
| |
| @Test |
| public void testUnannotated() { |
| EvalFunc<DataBag> myFunc = new UnannotatedFunc(); |
| assertNull(myFunc.outputSchema(null)); |
| } |
| |
| @Test |
| public void testComplex() throws FrontendException { |
| EvalFunc<DataBag> myFunc = new ComplexFunc(); |
| // y:bag{t:tuple(len:int,word:chararray)} |
| Schema ts = new Schema(Lists.asList(new FieldSchema("len", DataType.INTEGER), |
| new FieldSchema[] {new FieldSchema("word", DataType.CHARARRAY)})); |
| // Pig silently drops the name of a tuple the bag hold, since it's more or less invisible. |
| FieldSchema bfs = new FieldSchema(null, ts, DataType.TUPLE); |
| Schema bs = new Schema(); |
| bs.add(bfs); |
| Schema s = new Schema(); |
| s.add(new FieldSchema("y", bs, DataType.BAG)); |
| assertEquals(s, myFunc.outputSchema(null)); |
| } |
| |
| |
| } |