aoqi@0: /*
aoqi@0:  * Copyright (c) 2004, 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  * THIS FILE WAS MODIFIED BY SUN MICROSYSTEMS, INC.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.fastinfoset.util;
aoqi@0: 
aoqi@0: import com.sun.xml.internal.org.jvnet.fastinfoset.FastInfosetException;
aoqi@0: import com.sun.xml.internal.fastinfoset.CommonResourceBundle;
aoqi@0: 
aoqi@0: 
aoqi@0: public class DuplicateAttributeVerifier {
aoqi@0:     public static final int MAP_SIZE = 256;
aoqi@0: 
aoqi@0:     public int _currentIteration;
aoqi@0: 
aoqi@0:     public static class Entry {
aoqi@0:         private int iteration;
aoqi@0:         private int value;
aoqi@0: 
aoqi@0:         private Entry hashNext;
aoqi@0: 
aoqi@0:         private Entry poolNext;
aoqi@0:     }
aoqi@0: 
aoqi@0:     private Entry[] _map;
aoqi@0: 
aoqi@0:     public final Entry _poolHead;
aoqi@0:     public Entry _poolCurrent;
aoqi@0:     private Entry _poolTail;
aoqi@0: 
aoqi@0: 
aoqi@0:     public DuplicateAttributeVerifier() {
aoqi@0:         _poolTail = _poolHead = new Entry();
aoqi@0:     }
aoqi@0: 
aoqi@0:     public final void clear() {
aoqi@0:         _currentIteration = 0;
aoqi@0: 
aoqi@0:         Entry e = _poolHead;
aoqi@0:         while (e != null) {
aoqi@0:             e.iteration = 0;
aoqi@0:             e = e.poolNext;
aoqi@0:         }
aoqi@0: 
aoqi@0:         reset();
aoqi@0:     }
aoqi@0: 
aoqi@0:     public final void reset() {
aoqi@0:         _poolCurrent = _poolHead;
aoqi@0:         if (_map == null) {
aoqi@0:             _map = new Entry[MAP_SIZE];
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     private final void increasePool(int capacity) {
aoqi@0:         if (_map == null) {
aoqi@0:             _map = new Entry[MAP_SIZE];
aoqi@0:             _poolCurrent = _poolHead;
aoqi@0:         } else {
aoqi@0:             final Entry tail = _poolTail;
aoqi@0:             for (int i = 0; i < capacity; i++) {
aoqi@0:                 final Entry e = new Entry();
aoqi@0:                 _poolTail.poolNext = e;
aoqi@0:                 _poolTail = e;
aoqi@0:             }
aoqi@0: 
aoqi@0:             _poolCurrent = tail.poolNext;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     public final void checkForDuplicateAttribute(int hash, int value) throws FastInfosetException {
aoqi@0:         if (_poolCurrent == null) {
aoqi@0:             increasePool(16);
aoqi@0:         }
aoqi@0: 
aoqi@0:         // Get next free entry
aoqi@0:         final Entry newEntry = _poolCurrent;
aoqi@0:         _poolCurrent = _poolCurrent.poolNext;
aoqi@0: 
aoqi@0:         final Entry head = _map[hash];
aoqi@0:         if (head == null || head.iteration < _currentIteration) {
aoqi@0:             newEntry.hashNext = null;
aoqi@0:             _map[hash] = newEntry;
aoqi@0:             newEntry.iteration = _currentIteration;
aoqi@0:             newEntry.value = value;
aoqi@0:         } else {
aoqi@0:             Entry e = head;
aoqi@0:             do {
aoqi@0:                 if (e.value == value) {
aoqi@0:                     reset();
aoqi@0:                     throw new FastInfosetException(CommonResourceBundle.getInstance().getString("message.duplicateAttribute"));
aoqi@0:                 }
aoqi@0:             } while ((e = e.hashNext) != null);
aoqi@0: 
aoqi@0:             newEntry.hashNext = head;
aoqi@0:             _map[hash] = newEntry;
aoqi@0:             newEntry.iteration = _currentIteration;
aoqi@0:             newEntry.value = value;
aoqi@0:         }
aoqi@0:     }
aoqi@0: }