Mercurial > jdk8-mips64-public > jaxws / file comparison
comparison: src/share/jaxws_classes/com/sun/xml/internal/bind/v2/util/FlattenIterator.java
src/share/jaxws_classes/com/sun/xml/internal/bind/v2/util/FlattenIterator.java
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| 1 /* | |
| 2 * Copyright (c) 1997, 2011, 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 com.sun.xml.internal.bind.v2.util; | |
| 27 | |
| 28 import java.util.Iterator; | |
| 29 import java.util.Map; | |
| 30 import java.util.NoSuchElementException; | |
| 31 | |
| 32 /** | |
| 33 * {@link Iterator} that walks over a map of maps. | |
| 34 * | |
| 35 * @author Kohsuke Kawaguchi | |
| 36 * @since 2.0 | |
| 37 */ | |
| 38 public final class FlattenIterator<T> implements Iterator<T> { | |
| 39 | |
| 40 private final Iterator<? extends Map<?,? extends T>> parent; | |
| 41 private Iterator<? extends T> child = null; | |
| 42 private T next; | |
| 43 | |
| 44 public FlattenIterator( Iterable<? extends Map<?,? extends T>> core ) { | |
| 45 this.parent = core.iterator(); | |
| 46 } | |
| 47 | |
| 48 | |
| 49 public void remove() { | |
| 50 throw new UnsupportedOperationException(); | |
| 51 } | |
| 52 | |
| 53 public boolean hasNext() { | |
| 54 getNext(); | |
| 55 return next!=null; | |
| 56 } | |
| 57 | |
| 58 public T next() { | |
| 59 T r = next; | |
| 60 next = null; | |
| 61 if(r==null) | |
| 62 throw new NoSuchElementException(); | |
| 63 return r; | |
| 64 } | |
| 65 | |
| 66 private void getNext() { | |
| 67 if(next!=null) return; | |
| 68 | |
| 69 if(child!=null && child.hasNext()) { | |
| 70 next = child.next(); | |
| 71 return; | |
| 72 } | |
| 73 // child is empty | |
| 74 if(parent.hasNext()) { | |
| 75 child = parent.next().values().iterator(); | |
| 76 getNext(); | |
| 77 } | |
| 78 // else | |
| 79 // no more object | |
| 80 } | |
| 81 } |
