cz.jirutka.rsql.parser.ast

Class NodesFactory

java.lang.Object

cz.jirutka.rsql.parser.ast.NodesFactory

@Immutable
public class NodesFactory
extends java.lang.Object

Factory that creates Node instances for the parser.

Constructor Summary

Constructors

Constructor and Description
NodesFactory(java.util.Set<ComparisonOperator> operators) Creates a new instance of NodesFactory with given supported operators.

Method Summary

Modifier and Type	Method and Description
ComparisonNode	createComparisonNode(java.lang.String operatorToken, java.lang.String selector, java.util.List<java.lang.String> arguments) Creates a ComparisonNode instance with the given parameters.
LogicalNode	createLogicalNode(LogicalOperator operator, java.util.List<Node> children) Creates a specific LogicalNode instance for the specified operator and with the given children nodes.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NodesFactory

public NodesFactory(java.util.Set<ComparisonOperator> operators)

Creates a new instance of NodesFactory with given supported operators.

Parameters:

operators - The supported operators. Must not be null or empty.

Throws:

java.lang.IllegalArgumentException - If operators is null or empty. If operator's primary symbol is equal to one of alternative symbols of other operator.

Method Detail

createLogicalNode

public LogicalNode createLogicalNode(LogicalOperator operator,
                                     java.util.List<Node> children)

Creates a specific LogicalNode instance for the specified operator and with the given children nodes.

Parameters:

operator - The logical operator to create a node for.

children - Children nodes, i.e. operands.

Returns:

A subclass of the LogicalNode according to the specified operator.

createComparisonNode

public ComparisonNode createComparisonNode(java.lang.String operatorToken,
                                           java.lang.String selector,
                                           java.util.List<java.lang.String> arguments)
                                    throws UnknownOperatorException

Creates a ComparisonNode instance with the given parameters.

Parameters:

operatorToken - A textual representation of the comparison operator to be found in the set of supported operators.

selector - The selector that specifies the left side of the comparison.

arguments - A list of arguments that specifies the right side of the comparison.

Returns:

a ComparisonNode instance with the given parameters.

Throws:

UnknownOperatorException - If no operator for the specified operator token exists.