| /* |
| * 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 junit.framework.Assert; |
| |
| import java.io.IOException; |
| import java.lang.reflect.Method; |
| |
| import org.apache.pig.FuncSpec; |
| import org.apache.pig.LoadCaster; |
| import org.apache.pig.builtin.PigStorage; |
| import org.apache.pig.builtin.Utf8StorageConverter; |
| import org.apache.pig.impl.io.FileSpec; |
| import org.apache.pig.newplan.logical.relational.LOLoad; |
| import org.apache.pig.newplan.logical.relational.LogicalPlan; |
| import org.apache.pig.newplan.logical.visitor.LineageFindRelVisitor; |
| |
| import org.junit.After; |
| import org.junit.AfterClass; |
| import org.junit.Before; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| |
| public class TestLineageFindRelVisitor { |
| |
| public static class SillyLoadCasterWithExtraConstructor extends Utf8StorageConverter { |
| public SillyLoadCasterWithExtraConstructor(String ignored) { |
| super(); |
| } |
| } |
| public static class SillyLoaderWithLoadCasterWithExtraConstructor extends PigStorage { |
| public static int counter=0; |
| public SillyLoaderWithLoadCasterWithExtraConstructor() { |
| super(); |
| counter++; |
| } |
| @Override |
| public LoadCaster getLoadCaster() throws IOException { |
| return new SillyLoadCasterWithExtraConstructor("abc"); |
| } |
| } |
| |
| public static class SillyLoaderWithLoadCasterWithExtraConstructor2 extends PigStorage { |
| public SillyLoaderWithLoadCasterWithExtraConstructor2() { |
| super(); |
| } |
| @Override |
| public LoadCaster getLoadCaster() throws IOException { |
| return new SillyLoadCasterWithExtraConstructor("abc"); |
| } |
| } |
| |
| @Test |
| public void testhaveIdenticalCasters() throws Exception { |
| LogicalPlan lp = new LogicalPlan(); |
| Class<LineageFindRelVisitor> lineageFindRelVisitorClass = LineageFindRelVisitor.class; |
| Method testMethod = lineageFindRelVisitorClass.getDeclaredMethod("haveIdenticalCasters", |
| FuncSpec.class, |
| FuncSpec.class); |
| testMethod.setAccessible(true); |
| |
| LineageFindRelVisitor lineageFindRelVisitor = new LineageFindRelVisitor(lp); |
| |
| FuncSpec defaultSpec = new FuncSpec("PigStorage", new String [0]); |
| |
| // if either param is null, it should return false |
| Assert.assertFalse("null param should always return false", |
| (Boolean) testMethod.invoke(lineageFindRelVisitor, null, null) ); |
| Assert.assertFalse("null param should always return false", |
| (Boolean) testMethod.invoke(lineageFindRelVisitor, null, defaultSpec) ); |
| Assert.assertFalse("null param should always return false", |
| (Boolean) testMethod.invoke(lineageFindRelVisitor, defaultSpec, null ) ); |
| |
| Assert.assertTrue("Same loaders are considered equal", |
| (Boolean) testMethod.invoke(lineageFindRelVisitor, defaultSpec, defaultSpec) ); |
| |
| FuncSpec withDefaultCasterSpec = new FuncSpec("org.apache.pig.test.PigStorageWithStatistics", new String [0]); |
| |
| //PigStroage and PigStorageWithStatistics both use Utf8StorageConverter caster |
| Assert.assertTrue("Different Loaders but same LoadCaster with only default constructor. They should be considered same.", |
| (Boolean) testMethod.invoke(lineageFindRelVisitor, defaultSpec, withDefaultCasterSpec) ); |
| |
| |
| FuncSpec casterWithExtraConstuctorSpec = new FuncSpec( |
| "org.apache.pig.test.TestLineageFindRelVisitor$SillyLoaderWithLoadCasterWithExtraConstructor", |
| new String[0]); |
| FuncSpec casterWithExtraConstuctorSpec2 = new FuncSpec( |
| "org.apache.pig.test.TestLineageFindRelVisitor$SillyLoaderWithLoadCasterWithExtraConstructor2", |
| new String[0]); |
| |
| // these silly loaders have different classname but returns instance |
| // from the same LoadCaster class. However, this loadcaster takes extra param on |
| // constructors and cannot guarantee equality |
| |
| Assert.assertFalse("Different Loader, different LoadCaster are definitely not equal", |
| (Boolean) testMethod.invoke(lineageFindRelVisitor, |
| defaultSpec, casterWithExtraConstuctorSpec) ); |
| |
| Assert.assertFalse("Even when LoadCaster class matches, we consider them different when they have non-default constructor", |
| (Boolean) testMethod.invoke(lineageFindRelVisitor, |
| casterWithExtraConstuctorSpec, casterWithExtraConstuctorSpec2) ); |
| |
| Assert.assertTrue("Same Loaders should be always equal irrespective of loadcaster constructors", |
| (Boolean) testMethod.invoke(lineageFindRelVisitor, |
| casterWithExtraConstuctorSpec, casterWithExtraConstuctorSpec) ); |
| |
| Assert.assertEquals("Loader should be instantiated at most once.", SillyLoaderWithLoadCasterWithExtraConstructor.counter, 1); |
| } |
| } |