java.lang.ThreadLocal Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of java-runtime Show documentation

The newest version!

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package java.lang;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

/**
 *
 * @author shannah
 */
public class ThreadLocal extends Object {

    private Map value = new HashMap();
    private Set initialized = new HashSet();

    public ThreadLocal() {
        super();
    }

    protected T initialValue() {
        return null;
    }

    public T get() {
        Thread t = Thread.currentThread();
        if (!initialized.contains(t)) {
            initialized.add(t);
            value.put(t, initialValue());
        }
        return value.get(t);
        
        
    }

    public void set(T value) {
        Thread t = Thread.currentThread();
        
        if (!initialized.contains(t)) {
            initialized.add(t);
        }
        this.value.put(t, value);
    }

    public void remove() {
        Thread t = Thread.currentThread();
        initialized.remove(t);
        value.remove(t);
    }
}