core/src/main/java/org/apache/carbondata/core/scan/expression/LiteralExpression.java

/*
 * 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.metadata.datatype.DataType;
import org.apache.carbondata.core.scan.filter.intf.ExpressionType;
import org.apache.carbondata.core.scan.filter.intf.RowIntf;

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() {
    return value == null ? null : value.toString();
  }

  /**
   * getLiteralExpDataType.
   *
   * @return
   */
  public DataType getLiteralExpDataType() {
    return dataType;
  }

  public Object getLiteralExpValue() {
    return value;
  }

  @Override
  public void findAndSetChild(Expression oldExpr, Expression newExpr) {
  }

}