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// ========================================================================
// Copyright (c) 2004-2009 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
package org.eclipse.jetty.util;
import java.io.Serializable;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/* ------------------------------------------------------------ */
/**
*/
public class ArrayUtil
implements Cloneable, Serializable
{
/* ------------------------------------------------------------ */
public static<T> T[] removeFromArray(T[] array, Object item)
{
if (item==null || array==null)
return array;
for (int i=array.length;i-->0;)
{
if (item.equals(array[i]))
{
Class<?> c = array==null?item.getClass():array.getClass().getComponentType();
@SuppressWarnings("unchecked")
T[] na = (T[])Array.newInstance(c, Array.getLength(array)-1);
if (i>0)
System.arraycopy(array, 0, na, 0, i);
if (i+1<array.length)
System.arraycopy(array, i+1, na, i, array.length-(i+1));
return na;
}
}
return array;
}
/* ------------------------------------------------------------ */
/** Add element to an array
* @param array The array to add to (or null)
* @param item The item to add
* @param type The type of the array (in case of null array)
* @return new array with contents of array plus item
*/
public static<T> T[] addToArray(T[] array, T item, Class<?> type)
{
if (array==null)
{
if (type==null && item!=null)
type= item.getClass();
@SuppressWarnings("unchecked")
T[] na = (T[])Array.newInstance(type, 1);
na[0]=item;
return na;
}
else
{
// TODO: Replace with Arrays.copyOf(T[] original, int newLength) from Java 1.6+
Class<?> c = array.getClass().getComponentType();
@SuppressWarnings("unchecked")
T[] na = (T[])Array.newInstance(c, Array.getLength(array)+1);
System.arraycopy(array, 0, na, 0, array.length);
na[array.length]=item;
return na;
}
}
/* ------------------------------------------------------------ */
/**
* @param array Any array of object
* @return A new <i>modifiable</i> list initialised with the elements from <code>array</code>.
*/
public static<E> List<E> asMutableList(E[] array)
{
if (array==null || array.length==0)
return new ArrayList<E>();
return new ArrayList<E>(Arrays.asList(array));
}
}
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