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NativeFieldKeySorter.java
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NativeFieldKeySorter.java
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/*
* Copyright (C) 2007, 2014, 2022 XStream Committers.
* All rights reserved.
*
* The software in this package is published under the terms of the BSD
* style license a copy of which has been included with this distribution in
* the LICENSE.txt file.
*
* Created on 17.05.2007 by Joerg Schaible
*/
package com.thoughtworks.xstream.converters.reflection;
import java.lang.reflect.Field;
import java.util.Comparator;
import java.util.Map;
import java.util.TreeMap;
/**
* Sort the fields in their natural order. Fields are returned in their declaration order, fields of base classes first.
*
* @author Jörg Schaible
* @since 1.2.2
*/
public class NativeFieldKeySorter implements FieldKeySorter {
@Override
public Map<FieldKey, Field> sort(final Class<?> type, final Map<FieldKey, Field> keyedByFieldKey) {
final Map<FieldKey, Field> map = new TreeMap<>(new Comparator<FieldKey>() {
@Override
public int compare(final FieldKey fieldKey1, final FieldKey fieldKey2) {
int i = fieldKey1.getDepth() - fieldKey2.getDepth();
if (i == 0) {
i = fieldKey1.getOrder() - fieldKey2.getOrder();
}
return i;
}
});
map.putAll(keyedByFieldKey);
return map;
}
}