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JEP is a Java library for parsing and evaluating mathematical expressions.

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/* @author rich
 * Created on 01-Oct-2004
 */
package org.lsmp.djep.rewrite;

import org.nfunk.jep.*;
import org.lsmp.djep.xjep.*;

/**
 * Basic implementation for a RewriteRule.
 * Subclasses can have access to NodeFactory,OperatorSet,TreeUtilsand XJep objects.
 * @author Rich Morris
 * Created on 01-Oct-2004
 */
public abstract class AbstractRewrite implements RewriteRuleI {
	/** A NodeFactory used for construction nodes. */
	protected NodeFactory nf;
	/** An OperatorSet used for finding operators. */
	protected OperatorSet opSet;
	/** TreeUtils for testing types of nodes. */
	protected TreeUtils tu;
	/** A reference to main XJep opbject. */
	protected XJep xj;

	/**
	 * Constructor with reference to XJep object.
	 */
	public AbstractRewrite(XJep xj) {
		opSet = xj.getOperatorSet();
		tu = xj.getTreeUtils();
		nf = xj.getNodeFactory();
		this.xj = xj;
	}
	/** Private default constructor. */
	private AbstractRewrite() {}
}