class StatementIterator |
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\class StatementIterator statementiterator.h Soprano/StatementIterator
An iterator that provides a stream of Statements. The most common use of StatementIterator is through Model.listStatements(). Many backends do lock the underlying Model during iteration. Thus, it is always a good idea to cache the results if they are to be used to modify the model to prevent a deadlock:
Soprano.StatementIterator it = model->listStatements(); QList For further details on %Soprano iterators see Iterator. Be aware that iterators in Soprano are shared objects which means that copies of one iterator object work on the same data.
Author Daniele Galdi |
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Creates and empty, invalid iterator. |
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Create a new StatementIterator instance that uses sti as backend. StatementIterator will take ownership of the backend. |
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Convenience method which extracts all statements (this does not include the
statements that have already been read from the iterator) from the iterator
and returns them in a list.
Be aware that after calling this method the iterator will be invalid. Returns A list of all statements that rest in the iterator. |
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Convenience method that creates an iterator over the context nodes of the statements
in this iterator.
The new iterator is just a wrapper around this one. Thus, changing it will also change this one. Returns A wrapper iterator over the context nodes. |
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Convenience method that creates an iterator over the object nodes of the statements
in this iterator.
The new iterator is just a wrapper around this one. Thus, changing it will also change this one. Returns A wrapper iterator over the object nodes. |
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Convenience method that creates an iterator over the predicate nodes of the statements
in this iterator.
The new iterator is just a wrapper around this one. Thus, changing it will also change this one. Returns A wrapper iterator over the predicate nodes. |
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Convenience method that creates an iterator over the subject nodes of the statements
in this iterator.
The new iterator is just a wrapper around this one. Thus, changing it will also change this one. Returns A wrapper iterator over the subject nodes. |