Class AbstractDataObject

    • Constructor Detail

      • AbstractDataObject

        public AbstractDataObject()
    • Method Detail

      • clone

        public abstract Object clone()
        Description copied from interface: DataObject
        Perform a deep copy of this object. Read-only state of the object is not copied; the new object will be read-write by default.

        Inherently immutable objects may optionally return the same object without modification from clone(), rather than constructing a new instance.

        Specified by:
        clone in interface DataObject
        clone in class Object
        a new object that is a deep copy of this object; for immutable objects, the same object may optionally be returned.
      • setReadOnly

        public void setReadOnly()
        Description copied from interface: DataObject
        Set this object to be "read-only". Any subsequent attempt to modify this object will throw IllegalStateException. Once an object has been made read-only, it cannot be later set to read-write - this is a "one-way" operation.

        Note that a read-only object is not necessarily immutable; if reference types are returned from accessors, then callers could theoretically mutate those objects even if the top-level object is marked as read-only. The ability to make objects read-only is intended to catch programming errors (e.g. attempting to modify a data object passed as part of a SLEE event), not to provide an absolute guarantee of immutability.

        Calling setReadOnly() on an object that is already read-only is a no-op.

        Some DataObject implementations may be inherently immutable. In those cases, they are considered always read-only.

        Specified by:
        setReadOnly in interface DataObject
      • isReadOnly

        public boolean isReadOnly()
        Description copied from interface: DataObject
        Check if this object has been set read-only.
        Specified by:
        isReadOnly in interface DataObject
        true if the object is read-only or inherently immutable
        See Also:
      • checkModify

        protected void checkModify()
        Checks whether this DataObject is mutable.
        IllegalStateException - if this DataObject is read-only