Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 GRANITE DATA SERVICES
 Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.
    
 This file is part of Granite Data Services.
    
 Granite Data Services is free software; you can redistribute it and/or modify
 it under the terms of the GNU Library General Public License as published by
 the Free Software Foundation; either version 2 of the License, or (at your
 option) any later version.
    
 Granite Data Services 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 Library General Public License
 for more details.
    
 You should have received a copy of the GNU Library General Public License
 along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeSet;

public class Main {
    @SuppressWarnings("unchecked")
    public static Collection<Object> newCollection(Class<?> targetClass, int length)
            throws InstantiationException, IllegalAccessException {

        if (targetClass.isInterface()) {

            if (Set.class.isAssignableFrom(targetClass)) {
                if (SortedSet.class.isAssignableFrom(targetClass))
                    return new TreeSet<Object>();
                return new HashSet<Object>(length);
            }

            if (targetClass.isAssignableFrom(ArrayList.class))
                return new ArrayList<Object>(length);

            throw new IllegalArgumentException("Unsupported collection interface: " + targetClass);
        }

        return (Collection<Object>) targetClass.newInstance();
    }
}