org.colomoto.mddlib.logicalfunction

Interface OperatorFactory

All Known Implementing Classes:

AndOperatorFactory, NotOperatorFactory, OrOperatorFactory

public interface OperatorFactory

Create FunctionNode for a given operator.

Each operator implementation should provide a single-instance factory to the parser.

OperatorFactory implementations are provided for the most common operators in the org.colomoto.mddlib.logicalfunction.operators package.

Author:

Aurelien Naldi

Method Summary

Modifier and Type	Method and Description
FunctionNode	getNode(Stack<FunctionNode> stack) Build a node representing this operator applied to the current parsing stack.
int	getPriority() Get the priority level of a given operator.
String	getSymbol() Get the symbol for this operator.

Method Detail

getSymbol

String getSymbol()

Get the symbol for this operator. The symbol is used in the text representation of logical function. It can be used to print the operator or to parse a logical function.

Returns:

the String used for this operator.

getPriority

int getPriority()

Get the priority level of a given operator. The priority is used to decide which operator should be applied first, especially when parenthesis are missing.

Returns:

the priority level of the corresponding operator

getNode

FunctionNode getNode(Stack<FunctionNode> stack)

Build a node representing this operator applied to the current parsing stack. The FunctionNode used as children for this operator will be extracted from the stack.

Parameters:

stack - current parsing stack

Returns:

a FunctionNode for this operator