1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/src/share/jaxws_classes/com/sun/xml/internal/bind/v2/util/FlattenIterator.java Tue Mar 06 16:09:35 2012 -0800 1.3 @@ -0,0 +1,81 @@ 1.4 +/* 1.5 + * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. 1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 1.7 + * 1.8 + * This code is free software; you can redistribute it and/or modify it 1.9 + * under the terms of the GNU General Public License version 2 only, as 1.10 + * published by the Free Software Foundation. Oracle designates this 1.11 + * particular file as subject to the "Classpath" exception as provided 1.12 + * by Oracle in the LICENSE file that accompanied this code. 1.13 + * 1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT 1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1.17 + * version 2 for more details (a copy is included in the LICENSE file that 1.18 + * accompanied this code). 1.19 + * 1.20 + * You should have received a copy of the GNU General Public License version 1.21 + * 2 along with this work; if not, write to the Free Software Foundation, 1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1.23 + * 1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 1.25 + * or visit www.oracle.com if you need additional information or have any 1.26 + * questions. 1.27 + */ 1.28 + 1.29 +package com.sun.xml.internal.bind.v2.util; 1.30 + 1.31 +import java.util.Iterator; 1.32 +import java.util.Map; 1.33 +import java.util.NoSuchElementException; 1.34 + 1.35 +/** 1.36 + * {@link Iterator} that walks over a map of maps. 1.37 + * 1.38 + * @author Kohsuke Kawaguchi 1.39 + * @since 2.0 1.40 + */ 1.41 +public final class FlattenIterator<T> implements Iterator<T> { 1.42 + 1.43 + private final Iterator<? extends Map<?,? extends T>> parent; 1.44 + private Iterator<? extends T> child = null; 1.45 + private T next; 1.46 + 1.47 + public FlattenIterator( Iterable<? extends Map<?,? extends T>> core ) { 1.48 + this.parent = core.iterator(); 1.49 + } 1.50 + 1.51 + 1.52 + public void remove() { 1.53 + throw new UnsupportedOperationException(); 1.54 + } 1.55 + 1.56 + public boolean hasNext() { 1.57 + getNext(); 1.58 + return next!=null; 1.59 + } 1.60 + 1.61 + public T next() { 1.62 + T r = next; 1.63 + next = null; 1.64 + if(r==null) 1.65 + throw new NoSuchElementException(); 1.66 + return r; 1.67 + } 1.68 + 1.69 + private void getNext() { 1.70 + if(next!=null) return; 1.71 + 1.72 + if(child!=null && child.hasNext()) { 1.73 + next = child.next(); 1.74 + return; 1.75 + } 1.76 + // child is empty 1.77 + if(parent.hasNext()) { 1.78 + child = parent.next().values().iterator(); 1.79 + getNext(); 1.80 + } 1.81 + // else 1.82 + // no more object 1.83 + } 1.84 +}