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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package org.glassfish.admin.amx.util;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Enumeration;
import java.util.Collections;
public final class ListUtil
{
private ListUtil()
{
// disallow instantiation
}
/**
Add all items in an array to a list.
*/
public static void addArray(
final List list,
final T[] array)
{
for (int i = 0; i < array.length; ++i)
{
list.add(array[i]);
}
}
public static List newList()
{
return new ArrayList();
}
public static List asStringList(final Object value)
{
List values = null;
if (value instanceof String)
{
values = Collections.singletonList((String) value);
}
else if (value instanceof String[])
{
values = ListUtil.newListFromArray((String[]) value);
}
else if (value instanceof List)
{
final List checkedList = TypeCast.checkList(TypeCast.asList(value), String.class);
values = new ArrayList(checkedList);
}
else
{
throw new IllegalArgumentException("" + value);
}
return values;
}
/**
Convert a List to a String[]
*/
public static String[] toStringArray(final List list)
{
final String[] names = new String[list.size()];
int i = 0;
for (final Object o : list)
{
names[i] = "" + o;
++i;
}
return (names);
}
/**
Create a new List from a Collection
*/
public static List newListFromCollection(final Collection c)
{
final List list = new ArrayList();
list.addAll(c);
return (list);
}
public static List newList(final Enumeration e)
{
final List items = new ArrayList();
while (e.hasMoreElements())
{
items.add(e.nextElement());
}
return items;
}
/**
Create a new List from a Collection
*/
public static List newListFromIterator(final Iterator iter)
{
final List list = new ArrayList();
while (iter.hasNext())
{
list.add(iter.next());
}
return (list);
}
/**
Create a new List with one member.
*/
public static List newList(T m1)
{
final List list = new ArrayList();
list.add(m1);
return (list);
}
/**
Create a new List with two members.
*/
public static List newList(
final T m1,
final T m2)
{
final List list = new ArrayList();
list.add(m1);
list.add(m2);
return (list);
}
/**
Create a new List with three members.
*/
public static List newList(
final T m1,
final T m2,
final T m3)
{
final List list = new ArrayList();
list.add(m1);
list.add(m2);
list.add(m3);
return (list);
}
/**
Create a new List with four members.
*/
public static List newList(
final T m1,
final T m2,
final T m3,
final T m4)
{
final List list = new ArrayList();
list.add(m1);
list.add(m2);
list.add(m3);
list.add(m4);
return (list);
}
/**
Create a new List with four members.
*/
public static List newList(
final T m1,
final T m2,
final T m3,
final T m4,
final T m5)
{
final List list = new ArrayList();
list.add(m1);
list.add(m2);
list.add(m3);
list.add(m4);
list.add(m5);
return (list);
}
public static List newListFromArray(final T[] items)
{
final List list = new ArrayList();
for (int i = 0; i < items.length; ++i)
{
list.add(items[i]);
}
return (list);
}
/**
Return a new List in reverse order. Because the List is new,
it works on any list, modifiable or not.
*/
public static List reverse(final List list)
{
final int numItems = list.size();
final List result = new ArrayList(numItems);
for (int i = 0; i < numItems; ++i)
{
result.add(list.get(numItems - i - 1));
}
return (result);
}
}