/**
* 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.hadoop.hive.ql.udf.generic;
import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.StringObjectInspector;
/**
* A test GenericUDF to return native Java's boolean type
*/
public class GenericUDFTestGetJavaBoolean extends GenericUDF {
ObjectInspector[] argumentOIs;
@Override
public ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumentException {
argumentOIs = arguments;
return PrimitiveObjectInspectorFactory.javaBooleanObjectInspector;
}
@Override
public Object evaluate(DeferredObject[] arguments) throws HiveException {
String input = ((StringObjectInspector) argumentOIs[0]).getPrimitiveJavaObject(arguments[0].get());
if (input.equalsIgnoreCase("true")) {
return Boolean.TRUE;
} else if (input.equalsIgnoreCase("false")) {
return false;
} else {
return null;
}
}
@Override
public String getDisplayString(String[] children) {
assert (children.length == 1);
return "TestGetJavaBoolean(" + children[0] + ")";
}
}