tk.pratanumandal.expr4j.token

Class Operator.Properties

java.lang.Object

tk.pratanumandal.expr4j.token.Operator.Properties

Enclosing class:

Operator

public static class Operator.Properties
extends Object

The Properties class represents the properties of an operator.
It contains information about the number of parameters supported, the precedence, and the associativity.
It also helps determine if an operator is a function or not and provides the function implementation.

Since:

0.0.1

Author:

Pratanu Mandal

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Operator.Properties.Associativity The Associativity enum represents the associativity property of an operator. It can be of three types: LEFT associative, RIGHT associative and NO associative.

Field Summary

Fields

Modifier and Type	Field and Description
Operator.Properties.Associativity	associativity The associativity of this operator.
Function	function Function implementation if this operator is a function. Otherwise null.
int	params Number of parameters required by this operator.
int	precedence The precedence of this operator. Precedence ranges from 1 to infinity, in ascending order, i.e, with 1 being lowest precedence possible. Although parenthesis and comma have 0 precedence, they are a special case and are evaluated separately.

Constructor Summary

Constructors

Constructor and Description
Properties(int params, int precedence) Parameterized constructor taking number of parameters and precedence. Associativity is set to LEFT and function is set to null.
Properties(int params, int precedence, Function function) Parameterized constructor taking number of parameters, precedence, and function. If function is not null, associativity is set to NO, otherwise LEFT.
Properties(int params, int precedence, Operator.Properties.Associativity associativity) Parameterized constructor taking number of parameters, precedence, and associativity. Function is set to null.
Properties(int params, int precedence, Operator.Properties.Associativity associativity, Function function) Parameterized constructor taking number of parameters, precedence, associativity, and function. It is recommended not to use this constructor, instead using one of the preset constructors if possible.

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

params

public final int params

Number of parameters required by this operator.

precedence

public final int precedence

The precedence of this operator.
Precedence ranges from 1 to infinity, in ascending order, i.e, with 1 being lowest precedence possible.
Although parenthesis and comma have 0 precedence, they are a special case and are evaluated separately.

associativity

public final Operator.Properties.Associativity associativity

The associativity of this operator.

function

public final Function function

Function implementation if this operator is a function.
Otherwise null.

Constructor Detail

Properties

public Properties(int params,
                  int precedence)

Parameterized constructor taking number of parameters and precedence.
Associativity is set to LEFT and function is set to null.

Parameters:

params - Number of parameters required by this operator

precedence - The precedence value of this operator

Properties

public Properties(int params,
                  int precedence,
                  Operator.Properties.Associativity associativity)

Parameterized constructor taking number of parameters, precedence, and associativity.
Function is set to null.

Parameters:

params - Number of parameters required by this operator

precedence - The precedence value of this operator

associativity - The associativity of this operator

Properties

public Properties(int params,
                  int precedence,
                  Function function)

Parameterized constructor taking number of parameters, precedence, and function.
If function is not null, associativity is set to NO, otherwise LEFT.

Parameters:

params - Number of parameters required by this operator

precedence - The precedence value of this operator

function - The function implementation for this operator

Properties

public Properties(int params,
                  int precedence,
                  Operator.Properties.Associativity associativity,
                  Function function)

Parameterized constructor taking number of parameters, precedence, associativity, and function.
It is recommended not to use this constructor, instead using one of the preset constructors if possible.

Parameters:

params - Number of parameters required by this operator

precedence - The precedence value of this operator

associativity - The associativity of this operator

function - The function implementation for this operator