content: /*
   * 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 com.aliyun.odps.udf.local.examples;
  
  import java.math.BigDecimal;
  import java.util.Date;
  
  import com.aliyun.odps.udf.UDF;
  import com.aliyun.odps.udf.local.util.TestUtils;
  
  public class UdfExample extends UDF {
  
    public String evaluate(String a, String b) {
      return "ss2s:" + a + "," + b;
    }
  
    public String evaluate(String a, String b, String c, String d) {
      return "ssss2s:" + a + "," + b + "," + c + "," + d;
    }
  
    public String evaluate(String a, String b, String c) {
      return "sss2s:" + a + "," + b + "," + c;
    }
  
    public String evaluate(String a, Date b) {
  
      return "sss2s:" + a + "|" + TestUtils.getDateFormat(TestUtils.DATE_FORMAT_2).format(b);
    }
  
    public Long evaluate(Long a, Long b) {
  
      return a + b;
    }
  
    public Double evaluate(Double a, Double b) {
  
      return a + b;
    }
  
    public Boolean evaluate(Boolean a, Boolean b) {
      if (a == null || b == null) {
        return false;
      }
      return a && b;
  
    }
  
    public BigDecimal evaluate(BigDecimal... arr) {
      if (arr == null || arr.length == 0) {
        return null;
      }
      BigDecimal result = new BigDecimal(0);
      for(BigDecimal tmp : arr) {
        if (tmp != null) {
          result = result.add(tmp);
        }
      }
      return result;
    }
  
    // negative
    public static String evaluate(String a) {
      return a;
    }
  
  }
  