org.apache.hadoop.hive.ql.udf.generic.GenericUDFBaseBinary Maven / Gradle / Ivy

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/**
 * 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;

/**
 * Base class for binary operators, overrides getDisplayString()
 *
 */
public abstract class GenericUDFBaseBinary extends GenericUDF {
  protected String opName = getClass().getSimpleName();
  protected String opDisplayName;  // should be set by child class

  @Override
  public String getDisplayString(String[] children) {
    assert (children.length == 2);
    return "(" + children[0] + " " + opDisplayName + " " + children[1] + ")";
  }
}