mytreenode.java

一个可以存储和打印成绩单的系统

package org.minjey.cjsjk.view.tree.node;

import java.util.HashMap;
import java.util.Iterator;

import javax.swing.tree.DefaultMutableTreeNode;

import org.minjey.cjsjk.model.Course;
import org.minjey.cjsjk.model.EnrollTime;
import org.minjey.cjsjk.model.ExamType;
import org.minjey.cjsjk.model.Major;
import org.minjey.cjsjk.model.MajorLength;
import org.minjey.cjsjk.model.MajorRecord;
import org.minjey.cjsjk.model.MajorType;
import org.minjey.cjsjk.model.Student;
import org.minjey.cjsjk.model.StudentStatue;
import org.minjey.cjsjk.util.Reflector;
import org.minjey.cjsjk.view.tree.NodeFactory;
import org.minjey.cjsjk.view.tree.NodeTypeConverter;

public abstract class MyTreeNode extends DefaultMutableTreeNode {
	
	protected HashMap<Integer, MyTreeNode> childNodes;
	private NodeFactory factory;
	private boolean isVirtual;
	protected Reflector reflector;
	
	public MyTreeNode(Object userObject) {
		super(userObject);
		factory = NodeFactory.getNodeFactory();
		isVirtual = false;
		reflector = new Reflector();
	}
	
	public abstract void addNode(MyTreeNode node);
	
	public abstract void deleteNode(MyTreeNode node);
	
	public Class getChildType() {
		Object userObject = getUserObject();
		return NodeFactory.getNodeFactory().getChildType(userObject);
	}
	
	public void setVirtualChild() {
		add(new Node4Virtual());
		isVirtual = true;
	}
	
	public void buildChildNodes() {
		if(isLeaf() || isVirtual) {
			removeAllChildren();
			HashMap<Integer, Object> cobjs = factory.getChildObjects(this);
			if(cobjs != null) {
				Iterator it = cobjs.values().iterator();
				while(it.hasNext()) {
					Object uobj = it.next();
					MyTreeNode node = NodeTypeConverter.objectToNode(uobj);
					add(node);
				}
			}
			isVirtual = false;
		}
	}
	
	public boolean isChildType(Object uobj) {
		Object userObject = getUserObject();
		Class cla = factory.getChildType(userObject);
		return cla.isInstance(uobj);
	}
	
	protected boolean isLeagleChild(Object pobj, Object cobj) {
		boolean leagle = false;
		if(cobj instanceof EnrollTime || cobj instanceof MajorRecord 
				|| cobj instanceof MajorLength || cobj instanceof MajorType 
				|| cobj instanceof ExamType || cobj instanceof StudentStatue) {
			leagle = true;
		} else {
			if(pobj instanceof Major || pobj instanceof ExamType || pobj instanceof StudentStatue) {
			
			} else 	if(cobj instanceof Course || cobj instanceof Student) {
				cobj = reflector.getValue(cobj, "major");
			}
			Class pcla = pobj.getClass();
			String fieldname = pcla.getSimpleName().toLowerCase() + "_id";
			Integer pid = (Integer)reflector.getValue(pobj, "id");
			Integer crid = (Integer)reflector.getValue(cobj, fieldname);
			leagle = pid.equals(crid);
		}
		return leagle;
	}

}