Examples with LogicalFilterResolverImpl org.apache.carbondata.core.scan.filter.resolver.LogicalFilterResolverImpl used on opensource projects

Example 1 with LogicalFilterResolverImpl

use of org.apache.carbondata.core.scan.filter.resolver.LogicalFilterResolverImpl in project carbondata by apache.

the class FilterExpressionProcessor method createFilterResolverTree.

/**
   * Pattern used : Visitor Pattern
   * Method will create filter resolver tree based on the filter expression tree,
   * in this algorithm based on the expression instance the resolvers will created
   *
   * @param expressionTree
   * @param tableIdentifier
   * @return
   */
private FilterResolverIntf createFilterResolverTree(Expression expressionTree, AbsoluteTableIdentifier tableIdentifier) {
    ExpressionType filterExpressionType = expressionTree.getFilterExpressionType();
    BinaryExpression currentExpression = null;
    switch(filterExpressionType) {
        case OR:
            currentExpression = (BinaryExpression) expressionTree;
            return new LogicalFilterResolverImpl(createFilterResolverTree(currentExpression.getLeft(), tableIdentifier), createFilterResolverTree(currentExpression.getRight(), tableIdentifier), currentExpression);
        case AND:
            currentExpression = (BinaryExpression) expressionTree;
            return new LogicalFilterResolverImpl(createFilterResolverTree(currentExpression.getLeft(), tableIdentifier), createFilterResolverTree(currentExpression.getRight(), tableIdentifier), currentExpression);
        case RANGE:
            return getFilterResolverBasedOnExpressionType(ExpressionType.RANGE, true, expressionTree, tableIdentifier, expressionTree);
        case EQUALS:
        case IN:
            return getFilterResolverBasedOnExpressionType(ExpressionType.EQUALS, ((BinaryConditionalExpression) expressionTree).isNull, expressionTree, tableIdentifier, expressionTree);
        case GREATERTHAN:
        case GREATERTHAN_EQUALTO:
        case LESSTHAN:
        case LESSTHAN_EQUALTO:
            return getFilterResolverBasedOnExpressionType(ExpressionType.EQUALS, true, expressionTree, tableIdentifier, expressionTree);
        case NOT_EQUALS:
        case NOT_IN:
            return getFilterResolverBasedOnExpressionType(ExpressionType.NOT_EQUALS, false, expressionTree, tableIdentifier, expressionTree);
        case FALSE:
            return getFilterResolverBasedOnExpressionType(ExpressionType.FALSE, false, expressionTree, tableIdentifier, expressionTree);
        case TRUE:
            return getFilterResolverBasedOnExpressionType(ExpressionType.TRUE, false, expressionTree, tableIdentifier, expressionTree);
        default:
            return getFilterResolverBasedOnExpressionType(ExpressionType.UNKNOWN, false, expressionTree, tableIdentifier, expressionTree);
    }
}