org.lsmp.djep.vectorJep
Class VectorJep

java.lang.Object
  org.nfunk.jep.JEP
      org.lsmp.djep.vectorJep.VectorJep

public class VectorJep

extends JEP

An extension of JEP with support for basic vectors and matricies. Use this class instead of JEP if you wish to use vectors and matricies.

Author:

Rich Morris Created on 19-Dec-2003

Field Summary

Fields inherited from class org.nfunk.jep.JEP

allowAssignment, allowUndeclared, errorList, ev, funTab, implicitMul, numberFactory, opSet, parser, symTab

Constructor Summary

VectorJep()

VectorJep(JEP j)

Method Summary

void	addStandardFunctions() Adds the standard functions to the parser.
java.lang.Object	evaluate(Node node) Evaluate a node.
java.lang.Object	evaluateRaw(Node node) Evaluate a node.

Methods inherited from class org.nfunk.jep.JEP

addComplex, addConstant, addFunction, addStandardConstants, addVariable, addVariable, addVariable, getAllowAssignment, getAllowUndeclared, getComplexValue, getErrorInfo, getFunctionTable, getImplicitMul, getNumberFactory, getOperatorSet, getParser, getSymbolTable, getTopNode, getTraverse, getValue, getValueAsObject, getVar, getVarValue, hasError, initFunTab, initSymTab, parse, parseExpression, removeFunction, removeVariable, setAllowAssignment, setAllowUndeclared, setImplicitMul, setTraverse, setVarValue

Methods inherited from class java.lang.Object

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

Constructor Detail

VectorJep

public VectorJep()

VectorJep

public VectorJep(JEP j)

Method Detail

addStandardFunctions

public void addStandardFunctions()

Description copied from class: JEP

Adds the standard functions to the parser. If this function is not called before parsing an expression, functions such as sin() or cos() would produce an "Unrecognized function..." error. In most cases, this method should be called immediately after the JEP object is created.

Overrides:

addStandardFunctions in class JEP

evaluate

public java.lang.Object evaluate(Node node)
                          throws java.lang.Exception

Evaluate a node. If the result is a scaler it will be unwrapped, i.e. it will return a Double and not a Scaler.

Overrides:

evaluate in class JEP

Parameters:

node - the top node of the tree representing the expression.

Returns:

The value of the expression

Throws:

java.lang.Exception - if for some reason the expression could not be evaluated

evaluateRaw

public java.lang.Object evaluateRaw(Node node)
                             throws java.lang.Exception

Evaluate a node. Does not unwrap scalers.

Throws:

java.lang.Exception