commonj.sdo.impl
Class ExternalizableDelegator
java.lang.Object
commonj.sdo.impl.ExternalizableDelegator
- 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
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
ExternalizableDelegator
public ExternalizableDelegator()
ExternalizableDelegator
public ExternalizableDelegator(Object target)
writeExternal
public void writeExternal(ObjectOutput out)
throws IOException
- Specified by:
writeExternal
in interface Externalizable
- Throws:
IOException
readExternal
public void readExternal(ObjectInput in)
throws IOException,
ClassNotFoundException
- Specified by:
readExternal
in interface Externalizable
- Throws:
IOException
ClassNotFoundException
readResolve
public Object readResolve()
throws ObjectStreamException
- Throws:
ObjectStreamException
Copyright © 2013 The Apache Software Foundation. All Rights Reserved.