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 org.apache.carbondata.core.scan.expression;
  
  import org.apache.carbondata.core.constants.CarbonCommonConstants;
  import org.apache.carbondata.core.metadata.datatype.DataType;
  import org.apache.carbondata.core.metadata.datatype.DataTypes;
  import org.apache.carbondata.core.scan.filter.intf.ExpressionType;
  import org.apache.carbondata.core.scan.filter.intf.RowIntf;
  import org.apache.carbondata.core.util.CarbonUtil;
  
  public class LiteralExpression extends LeafExpression {
  
    /**
     *
     */
    private static final long serialVersionUID = 1L;
    private Object value;
    private DataType dataType;
  
    public LiteralExpression(Object value, DataType dataType) {
      this.value = value;
      this.dataType = dataType;
    }
  
    @Override
    public ExpressionResult evaluate(RowIntf value) {
      return new ExpressionResult(dataType, this.value, true);
    }
  
    public ExpressionResult getExpressionResult() {
      return new ExpressionResult(dataType, this.value, true);
    }
  
    @Override
    public ExpressionType getFilterExpressionType() {
      // TODO Auto-generated method stub
      return ExpressionType.LITERAL;
    }
  
    @Override
    public String getString() {
      // TODO Auto-generated method stub
      return "LiteralExpression(" + value + ')';
    }
  
    @Override
    public String getStatement() {
      boolean quoteString = false;
      Object val = value;
      if (val != null) {
        if (dataType == DataTypes.STRING || val instanceof String) {
          quoteString = true;
        } else if (dataType == DataTypes.TIMESTAMP || dataType == DataTypes.DATE) {
          val = CarbonUtil.getFormattedDateOrTimestamp(dataType == DataTypes.TIMESTAMP ?
              CarbonCommonConstants.CARBON_TIMESTAMP_DEFAULT_FORMAT :
              CarbonCommonConstants.CARBON_DATE_DEFAULT_FORMAT, dataType, value, true);
          quoteString = true;
        }
      }
      return val == null ? null : quoteString ? "'" + val.toString() + "'" : val.toString();
    }
  
    /**
     * getLiteralExpDataType.
     *
     * @return
     */
    public DataType getLiteralExpDataType() {
      return dataType;
    }
  
    public Object getLiteralExpValue() {
      return value;
    }
  
    @Override
    public void findAndSetChild(Expression oldExpr, Expression newExpr) {
    }
  
  }
  