- All Implemented Interfaces:
- Externalizable, Serializable
public class ExternalizableDelegator
extends Object
implements Externalizable
Delegates DataObject serialization while ensuring implementation independent
java.io.Serialization. An implementation of DataObject returns an
ExternalizableDelegator from its writeReplace() method.
The root DataObject is the object returned from do.getRootObject() where do
is the DataObject being serialized in a java.io.ObjectOutputStream. When
do.getContainer() == null then do is a root object.
The byte format for each DataObject in the stream is: [0] [path] [root] //
when do is not a root object [1] [rootXML] // when do is a root object
where: [0] is the byte 0, serialized using writeByte(0). [1] is the byte 1,
serialized using writeByte(1).
[path] is an SDO path expression from the root DataObject to the serialized
DataObject such that root.getDataObject(path) == do. Serialized using
writeUTF(path).
[root] is the root object serialized using writeObject(root).
[rootXML] is the GZip of the XML serialization of the root DataObject. The
XML serialization is the same as XMLHelper.INSTANCE.save(root, "commonj.sdo",
"dataObject", stream); where stream is a GZIPOutputStream, length is the
number of bytes in the stream, and bytes are the contents of the stream.
Serialized using writeInt(length), write(bytes).
- See Also:
- Serialized Form