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 26 package jdk.nashorn.internal.runtime.arrays; 27 28 import java.lang.reflect.Array; 29 30 /** 31 * Iterator over a Java List. 32 */ 33 class JavaArrayIterator extends ArrayLikeIterator<Object> { 34 35 /** Array to iterate over */ 36 protected final Object 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 JavaArrayIterator(final Object array, final boolean includeUndefined) { 47 super(includeUndefined); 48 assert array.getClass().isArray() : "expecting Java array object"; 49 this.array = array; 50 this.length = Array.getLength(array); 51 } 52 53 /** 54 * Is the current index still inside the array 55 * @return true if inside the array 56 */ 57 protected boolean indexInArray() { 58 return index < length; 59 } 60 61 @Override 62 public Object next() { 63 return Array.get(array, (int)bumpIndex()); 64 } 65 66 @Override 67 public long getLength() { 68 return length; 69 } 70 71 @Override 72 public boolean hasNext() { 73 return indexInArray(); 74 } 75 76 @Override 77 public void remove() { 78 throw new UnsupportedOperationException("remove"); 79 } 80 }