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