org.lsmp.djep.sjep.Polynomial Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jep Show documentation
Show all versions of jep Show documentation
JEP is a Java library for parsing and evaluating mathematical expressions. Use groupId org.fudaa to deploy it in maven central
The newest version!
/* @author rich
* Created on 14-Dec-2004
*/
package org.lsmp.djep.sjep;
import org.nfunk.jep.*;
/**
* Represents a polynomial.
* i.e. a sum of terms which are typically
* {@link Monomial}s, but can be any {@link AbstractPNode}. The order of the terms is specified by the total ordering.
*
* @author Rich Morris
* Created on 14-Dec-2004
*/
public class Polynomial extends AbstractPNode {
PNodeI terms[];
/**
*
*/
Polynomial(PolynomialCreator pc,PNodeI terms[]) {
super(pc);
this.terms = terms;
}
MutiablePolynomial toMutiablePolynomial()
{
PNodeI newTerms[] = new PNodeI[terms.length];
for(int i=0;i= p.terms.length) return 1;
int res = terms[i].compareTo(p.terms[i]);
if(res != 0) return res;
}
if(terms.length < p.terms.length) return -1;
return 0;
}
private boolean isNegative(PNodeI node)
{
if(node instanceof PConstant)
return ((PConstant) node).isNegative();
if(node instanceof Monomial)
return ((Monomial) node).negativeCoefficient();
return false;
}
public String toString() {
if(terms.length==0)
return "0";
StringBuffer sb = new StringBuffer();
for(int i=0;i0 && !isNegative(terms[i]))
sb.append('+');
sb.append(terms[i].toString());
}
return sb.toString();
}
public Node toNode() throws ParseException {
if(terms.length==0)
return pc.nf.buildConstantNode(pc.zero);
Node args[] = new Node[terms.length];
for(int i=0;i