@Override
public Object decode(Class targetClass, Object fromDBObject, MappedField f)
throws MappingException {
if (fromDBObject == null) return null;
if (!((fromDBObject instanceof Binary) || (fromDBObject instanceof byte[]))) {
throw new MappingException(
"The stored data is not a DBBinary or byte[] instance for "
+ f.getFullName()
+ " ; it is a "
+ fromDBObject.getClass().getName());
}
try {
boolean useCompression = !f.getAnnotation(Serialized.class).disableCompression();
return Serializer.deserialize(fromDBObject, useCompression);
} catch (IOException e) {
throw new MappingException("While deserializing to " + f.getFullName(), e);
} catch (ClassNotFoundException e) {
throw new MappingException("While deserializing to " + f.getFullName(), e);
}
}
public void fromDBObject(final DBObject dbObj, final MappedField mf, final Object targetEntity) {
Object object = mf.getDbObjectValue(dbObj);
if (object == null) {
processMissingField(mf);
} else {
TypeConverter enc = getEncoder(mf);
Object decodedValue = enc.decode(mf.getType(), object, mf);
try {
mf.setFieldValue(targetEntity, decodedValue);
} catch (IllegalArgumentException e) {
throw new MappingException(
"Error setting value from converter ("
+ enc.getClass().getSimpleName()
+ ") for "
+ mf.getFullName()
+ " to "
+ decodedValue);
}
}
}
private TypeConverter getEncoder(Object val, MappedField mf) {
List<TypeConverter> tcs = null;
if (val != null) tcs = tcMap.get(val.getClass());
if (tcs == null || (tcs.size() > 0 && tcs.get(0) instanceof PassthroughConverter))
tcs = tcMap.get(mf.getType());
if (tcs != null) {
if (tcs.size() > 1)
log.warning(
"Duplicate converter for " + mf.getType() + ", returning first one from " + tcs);
return tcs.get(0);
}
for (TypeConverter tc : untypedTypeEncoders)
if (tc.canHandle(mf) || (val != null && tc.isSupported(val.getClass(), mf))) return tc;
throw new ConverterNotFoundException(
"Cannot find encoder for " + mf.getType() + " as need for " + mf.getFullName());
}