/tags/release-0.1-rc2/hive/external/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFOPAnd.java
Java | 84 lines | 55 code | 9 blank | 20 comment | 19 complexity | 26d0f7b1b690fd1b8f53bcd7b5d8a523 MD5 | raw file
Possible License(s): Apache-2.0, BSD-3-Clause, JSON, CPL-1.0
- /**
- * 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.Description;
- import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
- import org.apache.hadoop.hive.ql.exec.UDFArgumentLengthException;
- import org.apache.hadoop.hive.ql.metadata.HiveException;
- import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
- import org.apache.hadoop.hive.serde2.objectinspector.primitive.BooleanObjectInspector;
- import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory;
- import org.apache.hadoop.io.BooleanWritable;
- /**
- * GenericUDF Class for computing and.
- */
- @Description(name = "and", value = "a _FUNC_ b - Logical and")
- public class GenericUDFOPAnd extends GenericUDF {
- private final BooleanWritable result = new BooleanWritable();
- BooleanObjectInspector boi0,boi1;
- @Override
- public ObjectInspector initialize(ObjectInspector[] arguments)
- throws UDFArgumentException {
- if (arguments.length != 2) {
- throw new UDFArgumentLengthException(
- "The operator 'AND' only accepts 2 argument.");
- }
- boi0 = (BooleanObjectInspector) arguments[0];
- boi1 = (BooleanObjectInspector) arguments[1];
- return PrimitiveObjectInspectorFactory.writableBooleanObjectInspector;
- }
- @Override
- public Object evaluate(DeferredObject[] arguments) throws HiveException {
- boolean bool_a0 = false, bool_a1 = false;
- Object a0 = arguments[0].get();
- if (a0 != null) {
- bool_a0 = boi0.get(a0);
- if (bool_a0 == false) {
- result.set(false);
- return result;
- }
- }
- Object a1 = arguments[1].get();
- if (a1 != null) {
- bool_a1 = boi1.get(a1);
- if (bool_a1 == false) {
- result.set(false);
- return result;
- }
- }
- if ((a0 != null && bool_a0 == true) && (a1 != null && bool_a1 == true)) {
- result.set(true);
- return result;
- }
- return null;
- }
- @Override
- public String getDisplayString(String[] children) {
- assert (children.length == 2);
- return "(" + children[0] + " and " + children[1] + ")";
- }
- }