Examples of org.openrdf.sail.SailConnection.begin()

org.openrdf.sail.SailConnection.begin()
Begins a transaction requiring {@link #commit()} or {@link #rollback()} tobe called to close the transaction. @throws StoreException If the connection could not start a transaction, or if it already has an active transaction. @see #isAutoCommit()

            int before, after;


            // Add statement to the implicit null context.
            sc.removeStatements(null, uriA, null);
            sc.commit();
            sc.begin();
            before = countStatements(sc, null, uriA, null, false);
            sc.addStatement(uriB, uriA, uriC);
            sc.commit();
            sc.begin();
            after = countStatements(sc, null, uriA, null, false);

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            sc.commit();
            sc.begin();
            before = countStatements(sc, null, uriA, null, false);
            sc.addStatement(uriB, uriA, uriC);
            sc.commit();
            sc.begin();
            after = countStatements(sc, null, uriA, null, false);
            assertEquals(0, before);
            assertEquals(1, after);


            // Add plain literal statement to the default context.

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            assertEquals(1, after);


            // Add plain literal statement to the default context.
            sc.removeStatements(null, uriA, null);
            sc.commit();
            sc.begin();
            before = countStatements(sc, null, uriA, null, false);
            sc.addStatement(uriA, uriA, plainLitA);
            sc.addStatement(uriA, uriB, plainLitA);
            sc.addStatement(uriB, uriB, plainLitA);
            sc.commit();

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            before = countStatements(sc, null, uriA, null, false);
            sc.addStatement(uriA, uriA, plainLitA);
            sc.addStatement(uriA, uriB, plainLitA);
            sc.addStatement(uriB, uriB, plainLitA);
            sc.commit();
            sc.begin();
            after = countStatements(sc, null, uriA, null, false);
            assertEquals(0, before);
            assertEquals(1, after);


            // Add string-typed literal statement to the default context.

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            assertEquals(1, after);


            // Add string-typed literal statement to the default context.
            sc.removeStatements(null, firstName, null);
            sc.commit();
            sc.begin();
            before = countStatements(sc, null, firstName, null, false);
            sc.addStatement(foo, firstName, fooLabel);
            sc.commit();
            sc.begin();
            after = countStatements(sc, null, firstName, null, false);

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            sc.commit();
            sc.begin();
            before = countStatements(sc, null, firstName, null, false);
            sc.addStatement(foo, firstName, fooLabel);
            sc.commit();
            sc.begin();
            after = countStatements(sc, null, firstName, null, false);
            assertEquals(0, before);
            assertEquals(1, after);
            assertEquals(foo, toSet(sc.getStatements(null, firstName, null, false)).iterator().next().getSubject());

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            assertEquals(foo, toSet(sc.getStatements(null, firstName, null, false)).iterator().next().getSubject());


            // Add statement to a non-null context.
            sc.removeStatements(null, uriA, null);
            sc.commit();
            sc.begin();
            before = countStatements(sc, null, uriA, null, false);
            sc.addStatement(uriB, uriA, uriC, uriA);
            sc.commit();
            sc.begin();
            after = countStatements(sc, null, uriA, null, false);

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            sc.commit();
            sc.begin();
            before = countStatements(sc, null, uriA, null, false);
            sc.addStatement(uriB, uriA, uriC, uriA);
            sc.commit();
            sc.begin();
            after = countStatements(sc, null, uriA, null, false);
            assertEquals(0, before);
            assertEquals(1, after);


            sc.removeStatements(null, uriA, null);

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            assertEquals(0, before);
            assertEquals(1, after);


            sc.removeStatements(null, uriA, null);
            sc.commit();
            sc.begin();
            before = countStatements(sc, null, uriA, null, false);
            sc.addStatement(uriB, uriA, uriC, uriC);
            sc.addStatement(uriC, uriA, uriA, uriA);
            sc.commit();
            sc.begin();

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            sc.begin();
            before = countStatements(sc, null, uriA, null, false);
            sc.addStatement(uriB, uriA, uriC, uriC);
            sc.addStatement(uriC, uriA, uriA, uriA);
            sc.commit();
            sc.begin();
            sc.addStatement(uriA, uriA, uriB, uriB);
            sc.commit();
            sc.begin();
            after = countStatements(sc, null, uriA, null, false);
            assertEquals(0, before);

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