com.sun.xml.fastinfoset.util.DuplicateAttributeVerifier Maven / Gradle / Ivy
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* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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package com.sun.xml.fastinfoset.util;
import org.jvnet.fastinfoset.FastInfosetException;
import com.sun.xml.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;
}
}
}
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