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.conditional;
  
  import java.util.HashSet;
  import java.util.Set;
  
  import org.apache.carbondata.core.metadata.datatype.DataType;
  import org.apache.carbondata.core.metadata.datatype.DataTypes;
  import org.apache.carbondata.core.scan.expression.Expression;
  import org.apache.carbondata.core.scan.expression.ExpressionResult;
  import org.apache.carbondata.core.scan.expression.exception.FilterIllegalMemberException;
  import org.apache.carbondata.core.scan.expression.exception.FilterUnsupportedException;
  import org.apache.carbondata.core.scan.filter.intf.ExpressionType;
  import org.apache.carbondata.core.scan.filter.intf.RowIntf;
  
  public class InExpression extends BinaryConditionalExpression {
    private static final long serialVersionUID = -3149927446694175489L;
  
    protected transient Set<ExpressionResult> setOfExprResult;
  
    public InExpression(Expression left, Expression right) {
      super(left, right);
    }
  
    @Override
    public ExpressionResult evaluate(RowIntf value)
        throws FilterUnsupportedException, FilterIllegalMemberException {
      ExpressionResult leftResult = left.evaluate(value);
  
      if (setOfExprResult == null) {
        ExpressionResult rightResult = right.evaluate(value);
        ExpressionResult val = null;
        setOfExprResult = new HashSet<ExpressionResult>(10);
        for (ExpressionResult expressionResVal : rightResult.getList()) {
          if (expressionResVal.getDataType().getPrecedenceOrder() < leftResult.getDataType()
              .getPrecedenceOrder()) {
            val = leftResult;
          } else {
            val = expressionResVal;
          }
          DataType dataType = val.getDataType();
          if (dataType == DataTypes.BOOLEAN) {
            val = new ExpressionResult(val.getDataType(), expressionResVal.getBoolean());
          } else if (dataType == DataTypes.STRING || dataType == DataTypes.VARCHAR) {
            val = new ExpressionResult(val.getDataType(), expressionResVal.getString());
          } else if (dataType == DataTypes.SHORT) {
            val = new ExpressionResult(val.getDataType(), expressionResVal.getShort());
          } else if (dataType == DataTypes.INT) {
            val = new ExpressionResult(val.getDataType(), expressionResVal.getInt());
          } else if (dataType == DataTypes.DOUBLE) {
            val = new ExpressionResult(val.getDataType(), expressionResVal.getDouble());
          } else if (dataType == DataTypes.LONG) {
            val = new ExpressionResult(val.getDataType(), expressionResVal.getLong());
          } else if (dataType == DataTypes.DATE) {
            val = new ExpressionResult(val.getDataType(), expressionResVal.getTime());
          } else if (dataType == DataTypes.TIMESTAMP) {
            val = new ExpressionResult(val.getDataType(), expressionResVal.getTimeAsMillisecond());
          } else if (DataTypes.isDecimal(dataType)) {
            val = new ExpressionResult(val.getDataType(), expressionResVal.getDecimal());
          } else {
            throw new FilterUnsupportedException(
                "DataType: " + val.getDataType() + " not supported for the filter expression");
          }
          setOfExprResult.add(val);
        }
      }
      // Only left result needs to be checked for null because InExpression is basically
      // an OR Operation on the list of predicates that are provided.
      // Example: x in (1,2,null) would be converted to x=1 OR x=2 OR x=null.
      // If any of the predicates is null then the result is unknown thus we will return false
      // for x=null.
      // Left check will cover both the cases when left and right is null therefore no need
      // for a check on the right result.
      // Example: (null==null) -> Left null return false, (1==null) would automatically be false.
      if (leftResult.isNull()) {
        leftResult.set(DataTypes.BOOLEAN, false);
      } else {
        leftResult.set(DataTypes.BOOLEAN, setOfExprResult.contains(leftResult));
      }
      return leftResult;
    }
  
    @Override
    public ExpressionType getFilterExpressionType() {
      return ExpressionType.IN;
    }
  
    @Override
    public String getString() {
      return "IN(" + left.getString() + ',' + right.getString() + ')';
    }
  
    @Override
    public String getStatement() {
      return left.getStatement() + " in " + right.getStatement();
    }
  }
  