edu.uiuc.ncsa.security.storage.data.MapConverter Maven / Gradle / Ivy
package edu.uiuc.ncsa.security.storage.data;
import edu.uiuc.ncsa.security.core.Identifiable;
import edu.uiuc.ncsa.security.core.IdentifiableProvider;
/**
* A class that converts between objects and maps. You must supply some key.
* Created by Jeff Gaynor
* on 4/13/12 at 11:38 AM
*/
public class MapConverter {
public SerializationKeys keys;
protected IdentifiableProvider provider;
public MapConverter(SerializationKeys keys, IdentifiableProvider provider) {
this.keys = keys;
this.provider = provider;
}
/**
* Takes a map and returns an object of the given type, initialized with the values of the map.
*
* @param data
* @return
*/
public V fromMap(ConversionMap data) {
return fromMap(data, null);
}
public V fromMap(ConversionMap map, V v) {
if (v == null) {
v = provider.get(false);
}
v.setIdentifier(map.getIdentifier(keys.identifier()));
return v;
}
/**
* Takes the value and writes the data to the map. The reason that the map is supplied is
* that there are many specialized maps. It would place undue constraints on this class to trye
* and manage these as well.
*
* @param value
* @param data
*/
public void toMap(V value, ConversionMap data) {
data.put(keys.identifier(), value.getIdentifierString());
}
}