Examples of com.hp.hpl.jena.query.ResultSetRewindable.reset()

Class com.hp.hpl.jena.query.ResultSetRewindable

Examples of com.hp.hpl.jena.query.ResultSetRewindable.reset()

com.hp.hpl.jena.query.ResultSetRewindable.reset()
Move back to the start of the iterator for this instance of results of a query.

    {
        ResultSetRewindable rs1 = ResultSetFactory.makeRewindable(rs) ;
        ByteArrayOutputStream arr = new ByteArrayOutputStream() ;
        ResultSetFormatter.output(arr, rs1, fmt) ;
        byte bytes[] = arr.toByteArray() ;
        rs1.reset() ;
        ByteArrayInputStream ins = new ByteArrayInputStream(bytes) ;
        ResultSetRewindable rs2 = ResultSetFactory.makeRewindable(ResultSetFactory.load(ins, fmt)) ;


        // Ordered? Unordered?
        boolean b = ResultSetCompare.equalsByTerm(rs1, rs2) ;

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        // Ordered? Unordered?
        boolean b = ResultSetCompare.equalsByTerm(rs1, rs2) ;
        if ( ordered )
        {
            rs1.reset() ;
            rs2.reset() ;
            b = b & ResultSetCompare.equalsByTerm(rs1, rs2) ;
        }
        
        if ( !b )
        {

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        if ( !b )
        {
            System.out.println(new String(bytes)) ;
            rs1.reset() ;
            rs2.reset() ;
            ResultSetFormatter.out(rs1) ;
            ResultSetFormatter.out(rs2) ;
        }


        assertTrue(b) ;

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    {
        ResultSetRewindable rs1 = new ResultSetMem() ;
        ResultSetRewindable rs2 = new ResultSetMem() ;
        assertTrue(ResultSetCompare.equalsByTerm(rs1, rs2)) ;
        rs1.reset() ;
        rs2.reset() ;
        assertTrue(ResultSetCompare.equalsByTerm(rs1, rs2)) ;
    }
    
    @Test public void test_RS_cmp_2()
    {

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        // Same variable, different values
        ResultSetRewindable rs1 = makeRewindable("x", com.hp.hpl.jena.graph.NodeFactory.createURI("tag:local:1")) ;
        ResultSetRewindable rs2 = makeRewindable("x", com.hp.hpl.jena.graph.NodeFactory.createURI("tag:local:2")) ;
        assertFalse(ResultSetCompare.equalsByTerm(rs1, rs2)) ;
        rs1.reset() ;
        rs2.reset() ;
        assertFalse(ResultSetCompare.equalsByTerm(rs1, rs2)) ;
    }


    @Test public void test_RS_cmp_6()
    {

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        // Different variable, same values
        ResultSetRewindable rs1 = makeRewindable("x", com.hp.hpl.jena.graph.NodeFactory.createURI("tag:local")) ;
        ResultSetRewindable rs2 = makeRewindable("y", com.hp.hpl.jena.graph.NodeFactory.createURI("tag:local")) ;
        assertFalse(ResultSetCompare.equalsByTermAndOrder(rs1, rs2)) ;
        rs1.reset() ;
        rs2.reset() ;
        assertFalse(ResultSetCompare.equalsByTerm(rs1, rs2)) ;
    }
    
    // Value based 
    @Test public void test_RS_cmp_value_1()

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        ResultSetPeekable rs = ResultSetFactory.makePeekable(inner);
        assertTrue(rs.hasNext());
        assertNotNull(rs.peek());
        
        // Reset the inner result set independently
        inner.reset();
        
        // Since we moved the underlying result set backwards but we hadn't gone anywhere
        // we should still be able to safely access the underlying results
        assertTrue(rs.hasNext());
    }

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        assertTrue(rs.hasNext());
        assertNotNull(rs.peek());
        assertNotNull(rs.next());
        
        // Reset the inner result set independently
        inner.reset();
        
        // Since we moved the underlying result set backwards and had moved somewhere we
        // are now in an illegal state
        rs.hasNext();
    }

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    {
        ResultSetRewindable rs1 = ResultSetFactory.makeRewindable(BuilderResultSet.build(SSE.parseItem(StrUtils.strjoinNL(rs1$)))) ;
        ResultSetRewindable rs2 = ResultSetFactory.makeRewindable(BuilderResultSet.build(SSE.parseItem(StrUtils.strjoinNL(rs2$)))) ;
        assertTrue(ResultSetCompare.isomorphic(rs1, rs2)) ;
        rs1.reset() ;
        rs2.reset() ;   
        assertTrue(ResultSetCompare.equalsByTerm(rs1, rs2)) ;
        assertTrue(ResultSetCompare.equalsByValue(rs1, rs2)) ;
    }


    // -------- Support functions

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            // Create a ResultSetRewindable that can be reset to the beginning.
            // Do before first use.
            
            ResultSetRewindable rewindable = ResultSetFactory.makeRewindable(qexec.execSelect()) ;
            ResultSetFormatter.out(rewindable) ;
            rewindable.reset() ;
            ResultSetFormatter.out(rewindable) ;
        }
        finally
        {
            // QueryExecution objects should be closed to free any system resources

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