| // |
| // ======================================================================== |
| // Copyright (c) 1995-2017 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 |
| { |
| T[] na = Arrays.copyOf(array,array.length+1); |
| na[array.length]=item; |
| return na; |
| } |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** Add element to the start of 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[] prependToArray(T item, T[] array, 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 |
| { |
| Class<?> c = array.getClass().getComponentType(); |
| @SuppressWarnings("unchecked") |
| T[] na = (T[])Array.newInstance(c, Array.getLength(array)+1); |
| System.arraycopy(array, 0, na, 1, array.length); |
| na[0]=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)); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public static <T> T[] removeNulls(T[] array) |
| { |
| for (T t : array) |
| { |
| if (t==null) |
| { |
| List<T> list = new ArrayList<>(); |
| for (T t2:array) |
| if (t2!=null) |
| list.add(t2); |
| return list.toArray(Arrays.copyOf(array,list.size())); |
| } |
| } |
| return array; |
| } |
| |
| } |
| |