org.exolab.castor.mapping.loader.collection.handler.SortedMapCollectionHandler Maven / Gradle / Ivy
package org.exolab.castor.mapping.loader.collection.handler;
import java.util.Enumeration;
import java.util.SortedMap;
import java.util.TreeMap;
import org.exolab.castor.mapping.CollectionHandler;
import org.exolab.castor.mapping.MapItem;
import org.exolab.castor.mapping.loader.CollectionHandlers;
import org.exolab.castor.mapping.loader.J2CollectionHandlers.IteratorEnumerator;
public final class SortedMapCollectionHandler implements CollectionHandler {
@SuppressWarnings("unchecked")
public Object add(Object collection, T object) {
T key = object;
T value = object;
if (object instanceof MapItem) {
MapItem item = (MapItem) object;
key = item.getKey();
value = item.getValue();
if (value == null) {
value = object;
}
if (key == null) {
key = value;
}
}
if (collection == null) {
collection = new TreeMap();
((SortedMap) collection).put(key, value);
return collection;
}
((SortedMap) collection).put(key, value);
return null;
}
@SuppressWarnings("unchecked")
public Enumeration elements(final Object collection) {
if (collection == null)
return new CollectionHandlers.EmptyEnumerator();
return new IteratorEnumerator(((SortedMap) collection).values().iterator());
}
@SuppressWarnings("unchecked")
public int size(final Object collection) {
if (collection == null)
return 0;
return ((SortedMap) collection).size();
}
@SuppressWarnings("unchecked")
public Object clear(final Object collection) {
if (collection != null)
((SortedMap) collection).clear();
return null;
}
public String toString() {
return "SortedMap";
}
}