PNodeI (Java Expression Parser 2.4.2 API)

All Known Implementing Classes:

AbstractPNode, Monomial, PConstant, PFunction, Polynomial, POperator, PVariable
```
public interface PNodeI
```
An element in a polynomial representation of an expression. Provides the main routines for creating, comparing and manipulating polynomials.

Author:

Rich Morris Created on 17-Dec-2004

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`PNodeI`	`add(PNodeI node)` Adds a node to this one.
`int`	`compareTo(PNodeI fun)` Compares this expression to argument.
`PNodeI`	`div(PNodeI node)` Divides this by the argument.
`boolean`	`equals(Object o)` True is nodes represent the same parse trees
`boolean`	`equals(PNodeI node)` True is nodes represent the same parse trees
`PNodeI`	`expand()` complete expansion.
`PNodeI`	`invert()` inverts node i.e.
`boolean`	`isOne()` True if node represents one
`boolean`	`isZero()` True if node represents zero
`PNodeI`	`mul(PNodeI node)` Multiplies this by the argument.
`PNodeI`	`negate()` negates node i.e.
`PNodeI`	`pow(PNodeI node)` Raise this to the argument.
`PNodeI`	`sub(PNodeI node)` Subtracts the argument from this.
`Node`	`toNode()` Converts the node to standard JEP format.
`String`	`toString()` Produces a string representation of the argument.

- Method Detail
  - add
```
PNodeI add(PNodeI node)
    throws ParseException
```
    Adds a node to this one.
    
    Throws:
    
    ParseException
  - sub
```
PNodeI sub(PNodeI node)
    throws ParseException
```
    Subtracts the argument from this.
    
    Throws:
    
    ParseException
  - negate
```
PNodeI negate()
       throws ParseException
```
    negates node i.e. -x
    
    Throws:
    
    ParseException
  - mul
```
PNodeI mul(PNodeI node)
    throws ParseException
```
    Multiplies this by the argument.
    
    Throws:
    
    ParseException
  - div
```
PNodeI div(PNodeI node)
    throws ParseException
```
    Divides this by the argument.
    
    Throws:
    
    ParseException
  - pow
```
PNodeI pow(PNodeI node)
    throws ParseException
```
    Raise this to the argument.
    
    Throws:
    
    ParseException
  - invert
```
PNodeI invert()
       throws ParseException
```
    inverts node i.e. 1/x
    
    Throws:
    
    ParseException
  - equals
```
boolean equals(PNodeI node)
```
    True is nodes represent the same parse trees
  - equals
```
boolean equals(Object o)
```
    True is nodes represent the same parse trees
    
    Overrides:
    
    equals in class Object
  - compareTo
```
int compareTo(PNodeI fun)
```
    Compares this expression to argument. Uses a total ordering of expressions. Returns positive if this node comes after the argument.
  - toNode
```
Node toNode()
     throws ParseException
```
    Converts the node to standard JEP format.
    
    Throws:
    
    ParseException
  - toString
```
String toString()
```
    Produces a string representation of the argument.
    
    Overrides:
    
    toString in class Object
  - isZero
```
boolean isZero()
```
    True if node represents zero
  - isOne
```
boolean isOne()
```
    True if node represents one
  - expand
```
PNodeI expand()
       throws ParseException
```
    complete expansion. (1+x)^2 --> 1+2*x+x^2
    
    Throws:
    
    ParseException

Interface PNodeI

Method Summary

Method Detail

add

sub

negate

mul

div

pow

invert

equals

equals

compareTo

toNode

toString

isZero

isOne

expand