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.HashSet;
import java.util.List;

public class Main {
    public static final String REMOVED_TAG = "removed";
    public static final String ADDED_TAG = "added";

    /**
     * Gets the changes made to the a list of items
     * 
     * @return HashMap the a list of items removed from the original list and a
     *         list of items added to the original list
     * */
    public static <T> HashMap<String, HashSet<T>> getChangesToList(List<T> original, List<T> edited) {
        HashMap<String, HashSet<T>> changeSet = new HashMap<String, HashSet<T>>();
        HashSet<T> removed = new HashSet<T>(original);
        HashSet<T> added = new HashSet<T>(edited);
        removed.removeAll(edited);
        added.removeAll(original);

        changeSet.put(REMOVED_TAG, removed);
        changeSet.put(ADDED_TAG, added);

        return changeSet;
    }
}