tajo-core-tests/src/test/java/org/apache/tajo/engine/function/hiveudf/TestHiveFunctionLoader.java

/*
 *  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.tajo.engine.function.hiveudf;

import org.apache.hadoop.hive.ql.exec.UDF;
import org.apache.tajo.catalog.FunctionDesc;
import org.apache.tajo.common.TajoDataTypes;
import org.junit.Test;

import java.util.*;

import static org.junit.Assert.assertEquals;

public class TestHiveFunctionLoader {
  @Test
  public void testAnalyzeUDFclass() {
    Set<Class<? extends UDF>> funcSet = new HashSet<>();
    funcSet.add(HiveUDFtest.class);
    List<FunctionDesc> funcList = new LinkedList<>();

    HiveFunctionLoader.buildFunctionsFromUDF(funcSet, funcList, null);

    assertEquals(funcList.size(), 1);

    FunctionDesc desc = funcList.get(0);

    assertEquals("multiplestr", desc.getFunctionName());
    assertEquals(false, desc.isDeterministic());
    assertEquals(TajoDataTypes.Type.TEXT, desc.getReturnType().getType());
    assertEquals(TajoDataTypes.Type.TEXT, desc.getParamTypes()[0].getType());
    assertEquals(TajoDataTypes.Type.INT4, desc.getParamTypes()[1].getType());
  }
}