package gep.export;import gep.Expression;import java.util.ArrayList;import java.util.Iterator;import java.util.List;/** * 將表達(dá)式樹轉(zhuǎn)換為節(jié)點(diǎn)樹 */public class Convertor{	private int id = 0;			public Node convert(Expression expression)	{		id = 0;		Node node = convert1(expression);				return node;	}		private Node convert1(Expression expression)	{		Node node = new Node();		node.id = id++;  		node.expression = expression;		node.label = expression.getCode();				List subNodes = new ArrayList();		List subExpressions = expression.getChildren();		for (Iterator i=subExpressions.iterator(); i.hasNext(); )		{			Expression subExpression = (Expression) i.next();			Node subNode = convert1(subExpression);			subNodes.add(subNode);		}		node.children = subNodes;				return node;	}}