ScriptArrayIterator.java revision 953:221a84ef44c0
1/* 2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package jdk.nashorn.internal.runtime.arrays; 27 28import jdk.nashorn.internal.runtime.ScriptObject; 29 30/** 31 * Iterator over a NativeArray 32 */ 33class ScriptArrayIterator extends ArrayLikeIterator<Object> { 34 35 /** Array {@link ScriptObject} to iterate over */ 36 protected final ScriptObject array; 37 38 /** length of array */ 39 protected final long length; 40 41 /** 42 * Constructor 43 * @param array array to iterate over 44 * @param includeUndefined should undefined elements be included in iteration 45 */ 46 protected ScriptArrayIterator(final ScriptObject array, final boolean includeUndefined) { 47 super(includeUndefined); 48 this.array = array; 49 this.length = array.getArray().length(); 50 } 51 52 /** 53 * Is the current index still inside the array 54 * @return true if inside the array 55 */ 56 protected boolean indexInArray() { 57 return index < length; 58 } 59 60 @Override 61 public Object next() { 62 return array.get(bumpIndex()); 63 } 64 65 @Override 66 public long getLength() { 67 return length; 68 } 69 70 @Override 71 public boolean hasNext() { 72 if (!includeUndefined) { 73 while (indexInArray()) { 74 if (array.has(index)) { 75 break; 76 } 77 bumpIndex(); 78 } 79 } 80 81 return indexInArray(); 82 } 83 84 @Override 85 public void remove() { 86 array.delete(index, false); 87 } 88} 89