objectinspectortest.java~40~

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/**
 * <p>Title: ObjectInspectorTest </p>
 * 定制树模型
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2006</p>
 *
 * <p>Company: Spring </p>
 *
 * @author : Spring
 * @version 1.0
 */
//imports
import java.awt.*;
import java.awt.event.*;
import java.lang.reflect.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;

public class ObjectInspectorTest{
  public static void main(String[] args){
    JFrame frame = new ObjectInspectorFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.show();
  }
}

class ObjectInspectorFrame extends JFrame{
    public ObjectInspectorFrame(){
      setTitle("ObjectInspectorTest");
      setSize(WIDTH, HEIGHT);

      Variable v = new Variable(getClass(), "this", this);
      ObjectTreeModel model = new ObjectTreeModel();
      model.setRoot(v);
      //创建树型结构
      tree = new JTree(model);
      getContentPane().add(new JScrollPane(tree),
          BorderLayout.CENTER);
 }
   private JTree tree;
   private static final int WIDTH = 400;
   private static final int HEIGHT = 300;
  }

class ObjectTreeModel implements TreeModel{
   public ObjectTreeModel(){
     root = null;
   }
   public void setRoot(Variable v){
     Variable oldRoot = v;
     root = v;
     fireTreeStructureChanged(oldRoot);
   }

   /**
    * Description : 以下三个方法显示了对象树到JTree组件之间的结构
    * @return Object
    */
   //得到根节点
   public Object getRoot(){
     return root;
   }
   //得到当前节点的子节点个数
   public int getChildCount(Object parent){
     return ((Variable)parent).getFields().size();
   }

   /**
    *
    * @param parent Object
    * @param index int
    * @返回一个新的Variable对象,用于描述一个特定的字段
    */
   public Object getChild(Object parent,int index){
     ArrayList fields = ((Variable)parent).getFields();
     Field f =(Field)fields.get(index);
     Object parentValue = ((Variable)parent).getValue();
     try{
       //产生字段的类型和名字
       return new Variable(f.getType(),f.getName(),f.get(parentValue));
     }
     catch(IllegalAccessException e){
       return null;
     }
   }

   public int getIndexOfChild(Object parent,Object child){
     int n = getChildCount(parent);
     for(int i=0;i<n;i++)
       if(getChild(parent,i).equals(child))
         return i;
     return -1;
   }
   public boolean isLeaf(Object node){
     return getChildCount(node) == 0;
   }
   public void valueForPathChanged(TreePath path,
       Object newValue){

   }
   public void addTreeModelListener(TreeModelListener I){
       listenerList.add(TreeModelListener.class,I);

   }
   public void removeTreeModelListener(TreeModelListener I){
       listenerList.remove(TreeModelListener.class,I);
   }
   protected void fireTreeStructureChanged(Object oldRoot){
     TreeModelEvent event
         = new TreeModelEvent(this,new Object[]{oldRoot});
     EventListener[] listeners = listenerList.getListeners(
      TreeModelListener.class);
    for(int i = 0;i<listeners.length;i++)
      ((TreeModelListener)listeners[i]).treeStructureChanged(event);
   }
   private Variable root;
   private EventListenerList listenerList
       = new EventListenerList();
}

 class Variable{
   public Variable(Class aType,String aName,Object aValue){
     type = aType;
     name = aName;
     value = aValue;
     fields = new ArrayList();
     if(!type.isPrimitive() && !type.isArray() && !type.equals(String.class) &&
          value != null){
        for(Class c = value.getClass();c != null;c = c.getSuperclass()){
          Field[] f = c.getDeclaredFields();
          AccessibleObject.setAccessible(f,true);

          for(int i=0;i<f.length;i++)
            if((f[i].getModifiers() & Modifier.STATIC)==0)
              fields.add(f[i]);
        }
      }
   }
   public Object getValue(){
     return value;
   }
   public ArrayList getFields(){
     return fields;
   }
   public String toString(){
     String r = type + " " + name;
     if(type.isPrimitive())
       r += "=" + value;
     else if(type.equals(String.class))
       r += "=" + value;
     else if (value == null)
       r += "=null";
     return r;
   }
   private Class type;
   private String name;
   private Object value;
   private ArrayList fields;
 }