Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import java.util.HashMap;

import java.util.WeakHashMap;

public class Main {
    private static final WeakHashMap<Object, HashMap<String, Object>> additionalFields = new WeakHashMap<Object, HashMap<String, Object>>();

    public static Object getAdditionalInstanceField(Object obj, String key) {
        if (obj == null)
            throw new NullPointerException("object must not be null");
        if (key == null)
            throw new NullPointerException("key must not be null");

        HashMap<String, Object> objectFields;
        synchronized (additionalFields) {
            objectFields = additionalFields.get(obj);
            if (objectFields == null)
                return null;
        }

        synchronized (objectFields) {
            return objectFields.get(key);
        }
    }
}