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.lot.common;
  
  import com.aliyun.odps.OdpsType;
  
  import apsara.odps.lot.ExpressionProtos;
  
  public class Constant extends ScalarExpression {
  
    public long getIntValue() {
      assert (getType() == OdpsType.BIGINT);
      return intValue;
    }
  
    public void setIntValue(long intValue) {
      this.intValue = intValue;
      odpsType = OdpsType.BIGINT;
    }
  
    public double getDoubleValue() {
      assert (getType() == OdpsType.DOUBLE);
      return doubleValue;
    }
  
    public void setDoubleValue(double doubleValue) {
      this.doubleValue = doubleValue;
      odpsType = OdpsType.DOUBLE;
    }
  
    public String getStringValue() {
      assert (getType() == OdpsType.STRING);
      return stringValue;
    }
  
    public void setStringValue(String stringValue) {
      this.stringValue = stringValue;
      odpsType = OdpsType.STRING;
    }
  
    public long getDatetimeValue() {
      assert (getType() == OdpsType.DATETIME);
      return datetimeValue;
    }
  
    public void setDatetimeValue(long datetimeValue) {
      this.datetimeValue = datetimeValue;
      odpsType = OdpsType.DATETIME;
    }
  
    public boolean getBoolValue() {
      assert (getType() == OdpsType.BOOLEAN);
      return boolValue;
    }
  
    public void setBoolValue(boolean boolValue) {
      this.boolValue = boolValue;
      odpsType = OdpsType.BOOLEAN;
    }
  
    private long intValue;
    private double doubleValue;
    private String stringValue;
    private long datetimeValue;
    private boolean boolValue;
  
    private OdpsType odpsType;
  
    public OdpsType getType() {
      return odpsType;
    }
  
    public Constant() {
      setIntValue(0);
    }
  
    @Override
    public ExpressionProtos.ScalarExpression toProtoBuf() {
      ExpressionProtos.ScalarExpression.Builder
          builder =
          ExpressionProtos.ScalarExpression.newBuilder();
      apsara.odps.ExpressionProtos.Constant.Builder
          c =
          apsara.odps.ExpressionProtos.Constant.newBuilder();
      switch (odpsType) {
        case BIGINT:
          c.setInteger(intValue);
          break;
        case DOUBLE:
          c.setDouble(doubleValue);
          break;
        case BOOLEAN:
          c.setBool(boolValue);
          break;
        case DATETIME:
          c.setDatetime(datetimeValue);
          break;
        case STRING:
          c.setString(stringValue);
          break;
        default:
          assert (false);
      }
  
      builder.setConstant(c.build());
      return builder.build();
    }
  }
  