001package votorola.g.util; // Copyright 2008, Michael Allan. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Votorola Software"), to deal in the Votorola Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicence, and/or sell copies of the Votorola Software, and to permit persons to whom the Votorola Software is furnished to do so, subject to the following conditions: The preceding copyright notice and this permission notice shall be included in all copies or substantial portions of the Votorola Software. THE VOTOROLA SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE VOTOROLA SOFTWARE OR THE USE OR OTHER DEALINGS IN THE VOTOROLA SOFTWARE. 002 003import java.util.*; 004import votorola.g.lang.*; 005 006 007/** An unmodifiable list backed by an array. It is unmodifiable in the sense that clients 008 * are provided no means to access and modify the array. Modification of the array by 009 * other means will still affect the list. The list is actually serializeable only if 010 * its elements are serializeable. 011 */ 012public @ThreadSafe class ArrayListU<E> extends AbstractList<E> implements java.io.Serializable 013{ 014 015 016 /** Contructs an ArrayListU. 017 */ 018 public ArrayListU( E[] _backingArray ) 019 { 020 if( _backingArray == null ) throw new NullPointerException(); // fail fast 021 022 backingArray = _backingArray; 023 } 024 025 026 027 // - C o l l e c t i o n -------------------------------------------------------------- 028 029 030 public @Override int size() { return backingArray.length; } 031 032 033 034 // - L i s t -------------------------------------------------------------------------- 035 036 037 public @Override E get( int index ) { return backingArray[index]; } 038 039 040 041 // ==================================================================================== 042 043 044 /** An unmodifiable list that provides open access to the backing array. 045 */ 046 public static @ThreadRestricted("touch") final class Open<E> extends ArrayListU<E> 047 { 048 049 050 /** Contructs an ArrayListU.Open. 051 * 052 * @param backingArray per {@linkplain #getBackingArray getBackingArray}() 053 */ 054 public Open( E[] backingArray ) { super( backingArray ); } 055 056 057 058 // -------------------------------------------------------------------------------- 059 060 061 /** Returns the array that backs this list. 062 * 063 * @return non-null array 064 * 065 * @see #setBackingArray(Object[]) 066 */ 067 public E[] getBackingArray() { return backingArray; } 068 069 070 071 /** Sets the array that backs this list. 072 * 073 * @see #getBackingArray() 074 */ 075 public void setBackingArray( final E[] newBackingArray ) 076 { 077 if( newBackingArray == null ) throw new NullPointerException(); // fail fast 078 079 backingArray = newBackingArray; 080 } 081 082 083 } 084 085 086 087//// P r i v a t e /////////////////////////////////////////////////////////////////////// 088 089 090 protected E[] backingArray; 091 092 093}