package org.glassfish.gmbal.impl ;
import java.util.HashMap;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;
import javax.management.Descriptor;
import javax.management.modelmbean.DescriptorSupport;
public class DescriptorUtility {
private DescriptorUtility() {}
public static final Descriptor EMPTY_DESCRIPTOR =
makeDescriptor( new HashMap<String,Object>() );
public static Descriptor makeDescriptor( Map<String, ?> fields ) {
if (fields == null) {
throw Exceptions.self.nullMap() ;
}
SortedMap<String, Object> map =
new TreeMap<String, Object>(String.CASE_INSENSITIVE_ORDER);
for (Map.Entry<String, ?> entry : fields.entrySet()) {
String name = entry.getKey();
if (name == null || name.equals("")) {
throw Exceptions.self.badFieldName() ;
}
if (map.containsKey(name)) {
throw Exceptions.self.duplicateFieldName( name ) ;
}
map.put(name, entry.getValue());
}
int size = map.size();
String[] names = map.keySet().toArray(new String[size]);
Object[] values = map.values().toArray(new Object[size]);
return new DescriptorSupport( names, values ) ;
}
public static Descriptor union(Descriptor... descriptors) {
Map<String, Object> map =
new TreeMap<String, Object>(String.CASE_INSENSITIVE_ORDER);
for (Descriptor d : descriptors) {
if (d != null) {
String[] names = d.getFieldNames();
for (String n : names) {
Object v = d.getFieldValue(n);
map.put(n, v);
}
}
}
return makeDescriptor(map);
}
}