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Snapshot (com.agfa.hap.sdo 2.15.0-for-apache-SNAPSHOT API)
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com.agfa.hap.sdo</FONT>
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Interface Snapshot</H2>
<DL>
<DT><B>All Superinterfaces:</B> <DD>java.io.Serializable</DD>
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<DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../../com/agfa/hap/sdo/implementation/SnapshotImplementation.html" title="class in com.agfa.hap.sdo.implementation">SnapshotImplementation</A>, <A HREF="../../../../com/agfa/hap/sdo/implementation/SnapshotUnion.html" title="class in com.agfa.hap.sdo.implementation">SnapshotUnion</A></DD>
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<DT><PRE>public interface <B>Snapshot</B><DT>extends java.io.Serializable</DL>
</PRE>
<P>
Collection of structured data at a given moment in time.
You can think of this as a set of name-value pairs
where the names correspond to various <A HREF="../../../../com/agfa/hap/sdo/Property.html" title="interface in com.agfa.hap.sdo"><CODE>Property</CODE></A> instances.
The actual content (i.e. which properties are contained) has been defined based on
a <A HREF="../../../../com/agfa/hap/sdo/SnapshotDefinition.html" title="interface in com.agfa.hap.sdo"><CODE>SnapshotDefinition</CODE></A>.
<br />
The difference with a DataGraph is that a Snapshot contains the state of a
set of dataobjects at a certain moment in time. As such it is immutable.
Another difference is that is defines its content based on a definition as opposed
to the datagraph that uses the containment relation
defined by sdo ({@link Property#isContainment()}).
<br />
The data can be extracted either as a set of {@link ProxyDataObject} instances.
The data can also be returned as a set of objects (POJOs). The latter case assumes
appropriate classes can be
found that correspond to the different {@link Type}s that are used.
<br />
<strong>Warning:</strong>
Serialized objects of this class will not be compatible with
future hap.SDO releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of hap.sdo.
<P>
<P>
<DL>
<DT><B>Author:</B></DT>
<DD>AMOCZ</DD>
<DT><B>See Also:</B><DD><A HREF="../../../../com/agfa/hap/sdo/DataAccessService.html" title="class in com.agfa.hap.sdo"><CODE>DataAccessService</CODE></A>,
<A HREF="../../../../com/agfa/hap/sdo/DataMapper.html" title="interface in com.agfa.hap.sdo"><CODE>DataMapper</CODE></A></DL>
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<CODE><T> java.util.List<T></CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../com/agfa/hap/sdo/Snapshot.html#extract(com.agfa.hap.sdo.DataMapper)">extract</A></B>(<A HREF="../../../../com/agfa/hap/sdo/DataMapper.html" title="interface in com.agfa.hap.sdo">DataMapper</A><T> mapper)</CODE>
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Extracts the objects from the snapshots</TD>
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<A NAME="extract(com.agfa.hap.sdo.DataMapper)"><!-- --></A><H3>
extract</H3>
<PRE>
<T> java.util.List<T> <B>extract</B>(<A HREF="../../../../com/agfa/hap/sdo/DataMapper.html" title="interface in com.agfa.hap.sdo">DataMapper</A><T> mapper)</PRE>
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<DD>Extracts the objects from the snapshots
<P>
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<DT><B>Parameters:</B><DD><CODE>factory</CODE> -
<DT><B>Returns:</B><DD>A list containing new objects with appropriate properties filled in.</DL>
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