Package com.complexible.common.rdf

Class DelegatingStatementSource

java.lang.Object
com.complexible.common.rdf.DelegatingStatementSource
All Implemented Interfaces:
StatementSource, Closeable, AutoCloseable
Direct Known Subclasses:
ContextFallbackStatementSource, ContextOverrideStatementSource
public class DelegatingStatementSource extends Object implements StatementSource

Implementation of a StatementSource which can be used as the base for StatementSource decorator implementations.

Since:
0.8
Version:
4.0
Author:
Michael Grove

  • Constructor Details

    • DelegatingStatementSource

      public DelegatingStatementSource(StatementSource theSource)

  • Method Details

    • getSource

      public StatementSource getSource()

    • statements

      public StatementIterator statements()
      Return an iterator over the statements contained by this source.
      Specified by:
      statements in interface StatementSource
      Returns:
      an iteration over the statements.

    • streams

      public List<RDFStream> streams()
      Converts the statement source into one or more streams.
      Specified by:
      streams in interface StatementSource

    • getContext

      public Resource getContext()
      Return the context these statements belong to. When non-null, this should override the context specified on the statements themselves.
      Specified by:
      getContext in interface StatementSource
      Returns:
      the context of all the statements from this source, or `null` if there is no context (for all of them) or they each have their own context specified.

    • close

      public void close() throws IOException
      Specified by:
      close in interface AutoCloseable
      Specified by:
      close in interface Closeable
      Throws:
      IOException

    • containsVirtual

      public boolean containsVirtual()
      Description copied from interface: StatementSource
      Returns true if the statement source represents, at least partially, the contents of a Virtual Graph
      Specified by:
      containsVirtual in interface StatementSource

    • estimatedCount

      public long estimatedCount()
      Description copied from interface: StatementSource
      Returns the estimated count of statements in this source or NO_ESTIMATE if the estimate is not known.
      Specified by:
      estimatedCount in interface StatementSource

    • inMemory

      public boolean inMemory()
      Description copied from interface: StatementSource
      Returns true if all statements are held in memory
      Specified by:
      inMemory in interface StatementSource
      Returns:
      true if all statements are held in memory