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 setAdditionalStaticField(Object obj, String key, Object value) {
        return setAdditionalInstanceField(obj.getClass(), key, value);
    }

    public static Object setAdditionalStaticField(Class<?> clazz, String key, Object value) {
        return setAdditionalInstanceField(clazz, key, value);
    }

    public static Object setAdditionalInstanceField(Object obj, String key, Object value) {
        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) {
                objectFields = new HashMap<String, Object>();
                additionalFields.put(obj, objectFields);
            }
        }

        synchronized (objectFields) {
            return objectFields.put(key, value);
        }
    }
}