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.metadata.datatype.DataType;
  import org.apache.carbondata.core.metadata.schema.table.column.CarbonColumn;
  import org.apache.carbondata.core.metadata.schema.table.column.CarbonDimension;
  import org.apache.carbondata.core.metadata.schema.table.column.CarbonMeasure;
  import org.apache.carbondata.core.scan.filter.intf.ExpressionType;
  import org.apache.carbondata.core.scan.filter.intf.RowIntf;
  
  public class ColumnExpression extends LeafExpression {
  
    private static final long serialVersionUID = 1L;
  
    private String columnName;
  
    private boolean isDimension;
  
    private boolean isMeasure;
  
    private int colIndex = -1;
  
    private DataType dataType;
  
    private CarbonDimension dimension;
  
    private CarbonMeasure measure;
  
    private CarbonColumn carbonColumn;
  
    public ColumnExpression(String columnName, DataType dataType) {
      this.columnName = columnName;
      this.dataType = dataType;
  
    }
  
    public CarbonDimension getDimension() {
      return dimension;
    }
  
    public void setDimension(CarbonDimension dimension) {
      this.dimension = dimension;
    }
  
    public CarbonMeasure getMeasure() {
      return measure;
    }
  
    public void setMeasure(CarbonMeasure measure) {
      this.measure = measure;
    }
  
    public String getColumnName() {
      return columnName;
    }
  
    public boolean isDimension() {
      return isDimension;
    }
  
    public void setDimension(boolean isDimension) {
      this.isDimension = isDimension;
    }
  
    public boolean isMeasure() {
      return isMeasure;
    }
  
    public void setMeasure(boolean isMeasure) {
      this.isMeasure = isMeasure;
    }
  
    public int getColIndex() {
      return colIndex;
    }
  
    public void setColIndex(int colIndex) {
      this.colIndex = colIndex;
    }
  
    public DataType getDataType() {
      return dataType;
    }
  
    public void reset() {
      dimension = null;
      measure = null;
      isDimension = false;
      isMeasure = false;
      carbonColumn = null;
    }
  
    @Override
    public ExpressionResult evaluate(RowIntf value) {
      return new ExpressionResult(dataType, (null == value ? null : value.getVal(colIndex)));
    }
  
    @Override
    public ExpressionType getFilterExpressionType() {
      // TODO Auto-generated method stub
      return null;
    }
  
    @Override
    public String getString() {
      // TODO Auto-generated method stub
      return "ColumnExpression(" + columnName + ')';
    }
  
    @Override
    public String getStatement() {
      return columnName;
    }
  
    public CarbonColumn getCarbonColumn() {
      return carbonColumn;
    }
  
    public void setCarbonColumn(CarbonColumn carbonColumn) {
      this.carbonColumn = carbonColumn;
    }
  
    @Override
    public void findAndSetChild(Expression oldExpr, Expression newExpr) {
    }
  
  }
  