Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * USE - UML based specification environment
 * Copyright (C) 1999-2004 Mark Richters, University of Bremen
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

import java.util.HashSet;

import java.util.Set;

public class Main {
    /**
     * Returns the same set <code>theSet</code> if it has elements,
     * otherwise it returns a new <code>HashSet</code>.
     * Can be used in combination with {@link CollectionUtil#emptySetIfNull(Set)} to
     * use a singleton empty set as initial value.
     * <p>
     * <strong>Pre:</strong> <code>theSet != null</code>
     * </p>
     * <p>
     * <strong>Post:</strong> <code>result</code> is writable. 
     * @param <T> Element type of the Set
     * @param theSet A <code>Set</code>
     * @return The same set if <code>theSet.size() > 0</code> or a new <code>HashSet</code>  
     */
    public static <T> Set<T> initAsHashSet(final Set<T> theSet) {
        if (theSet.size() == 0)
            return new HashSet<T>();
        else
            return theSet;
    }
}