Package com.hp.hpl.jena.sparql.expr

Examples of com.hp.hpl.jena.sparql.expr.ExprList

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    public static Op transform(ExprList exprs, BasicPattern bgp)
    {
        if ( ! doFilterPlacement )
            return OpFilter.filter(exprs, new OpBGP(bgp)) ;
        // Mutated
        ExprList exprs2 = new ExprList(exprs) ;
        Op op = transformFilterBGP(exprs2, new HashSet<Var>(), bgp) ;
        // Remaining filters? e.g. ones mentioning var s not used anywhere.
        op = buildFilter(exprs2, op) ;
        return op ;
    }
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    public static Op transform(ExprList exprs, Node graphNode, BasicPattern bgp)
    {
        if ( ! doFilterPlacement )
            return OpFilter.filter(exprs, new OpQuadPattern(graphNode, bgp)) ;
        // Mutated
        ExprList exprs2 = new ExprList(exprs) ;
        Op op =  transformFilterQuadPattern(exprs2, new HashSet<Var>(), graphNode, bgp);
        op = buildFilter(exprs2, op) ;
        return op ;
    }
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    {
        if ( ! doFilterPlacement )
            return super.transform(opFilter, x) ;
       
        // Destructive use of exprs - copy it.
        ExprList exprs = new ExprList(opFilter.getExprs()) ;
        Set<Var> varsScope = new HashSet<Var>() ;
       
        Op op = transform(exprs, varsScope, x) ;
        if ( op == x )
            // Didn't do anything.
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    public void test_function_non_expansion_01() {
        Expr square = new E_Multiply(new ExprVar("x"), new ExprVar("x"));
        UserDefinedFunctionFactory.getFactory().add("http://example/square", square, new ArrayList<Var>(square.getVarsMentioned()));
       
        //Test that with preserveDependencies set to true that the definition of cube is not expanded
        Expr cube = new E_Multiply(new E_Function("http://example/square", new ExprList(new ExprVar("x"))), new ExprVar("x"));
        UserDefinedFunctionFactory.getFactory().add("http://example/cube", cube, new ArrayList<Var>(cube.getVarsMentioned()));
       
        UserDefinedFunctionDefinition def = UserDefinedFunctionFactory.getFactory().get("http://example/cube");
        Expr base = def.getBaseExpr();
        Assert.assertTrue(base instanceof E_Multiply);
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        Expr square = new E_Multiply(new ExprVar("x"), new ExprVar("x"));
        UserDefinedFunctionFactory.getFactory().add("http://example/square", square, new ArrayList<Var>(square.getVarsMentioned()));
       
        //This test illustrates that if we change the definition of square and call our function again we can
        //get a different result with dependencies preserved because the definition of the dependent function can change
        Expr cube = new E_Multiply(new E_Function("http://example/square", new ExprList(new ExprVar("x"))), new ExprVar("x"));
        UserDefinedFunctionFactory.getFactory().add("http://example/cube", cube, new ArrayList<Var>(cube.getVarsMentioned()));
       
        UserDefinedFunction f = (UserDefinedFunction) UserDefinedFunctionFactory.getFactory().create("http://example/cube");
        f.build("http://example/cube", new ExprList(new NodeValueInteger(2)));
       
        Expr actual = f.getActualExpr();
        NodeValue result = actual.eval(BindingFactory.create(), FunctionEnvBase.createTest());
        Assert.assertEquals(8, NodeFactoryExtra.nodeToInt(result.asNode()));
       
        //Change the definition of the function we depend on
        square = new ExprVar("x");
        UserDefinedFunctionFactory.getFactory().add("http://example/square", square, new ArrayList<Var>(square.getVarsMentioned()));
        f.build("http://example/cube", new ExprList(new NodeValueInteger(2)));
       
        actual = f.getActualExpr();
        result = actual.eval(BindingFactory.create(), FunctionEnvBase.createTest());
        Assert.assertEquals(4, NodeFactoryExtra.nodeToInt(result.asNode()));
    }
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    public void test_function_expansion_01() {
        Expr e = new ExprVar("x");
        UserDefinedFunctionFactory.getFactory().add("http://example/simple", e, new ArrayList<Var>(e.getVarsMentioned()));
       
        UserDefinedFunction f = (UserDefinedFunction) UserDefinedFunctionFactory.getFactory().create("http://example/simple");
        f.build("http://example/simple", new ExprList(new NodeValueBoolean(true)));
       
        Expr actual = f.getActualExpr();
        Assert.assertFalse(e.equals(actual));
        Assert.assertEquals(0, actual.getVarsMentioned().size());
        Assert.assertEquals(new NodeValueBoolean(true), actual);
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    public void test_function_expansion_02() {
        Expr e = new E_Multiply(new ExprVar("x"), new ExprVar("x"));
        UserDefinedFunctionFactory.getFactory().add("http://example/square", e, new ArrayList<Var>(e.getVarsMentioned()));
       
        UserDefinedFunction f = (UserDefinedFunction) UserDefinedFunctionFactory.getFactory().create("http://example/square");
        f.build("http://example/square", new ExprList(new NodeValueInteger(3)));
       
        Expr actual = f.getActualExpr();
        Assert.assertFalse(e.equals(actual));
        Assert.assertEquals(0, actual.getVarsMentioned().size());
        Assert.assertEquals(new E_Multiply(new NodeValueInteger(3), new NodeValueInteger(3)), actual);
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        defArgs.add(Var.alloc("x"));
        defArgs.add(Var.alloc("y"));
        UserDefinedFunctionFactory.getFactory().add("http://example/square", e, defArgs);
       
        UserDefinedFunction f = (UserDefinedFunction) UserDefinedFunctionFactory.getFactory().create("http://example/square");
        ExprList args = new ExprList();
        args.add(new NodeValueInteger(3));
        args.add(new NodeValueInteger(4));
        f.build("http://example/square", args);
       
        Expr actual = f.getActualExpr();
        Assert.assertFalse(e.equals(actual));
        Assert.assertEquals(0, actual.getVarsMentioned().size());
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        Expr square = new E_Multiply(new ExprVar("x"), new ExprVar("x"));
        UserDefinedFunctionFactory.getFactory().add("http://example/square", square, new ArrayList<Var>(square.getVarsMentioned()));
       
        //Test that with preserveDependencies set to false (the default) that the definition of cube is actually
        //expanded to include the definition of square
        Expr cube = new E_Multiply(new E_Function("http://example/square", new ExprList(new ExprVar("x"))), new ExprVar("x"));
        UserDefinedFunctionFactory.getFactory().add("http://example/cube", cube, new ArrayList<Var>(cube.getVarsMentioned()));
       
        UserDefinedFunctionDefinition def = UserDefinedFunctionFactory.getFactory().get("http://example/cube");
        Expr base = def.getBaseExpr();
        Assert.assertTrue(base instanceof E_Multiply);
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        Expr square = new E_Multiply(new ExprVar("x"), new ExprVar("x"));
        UserDefinedFunctionFactory.getFactory().add("http://example/square", square, new ArrayList<Var>(square.getVarsMentioned()));
       
        //Test that with preserveDependencies set to false (the default) that the definition of cube is actually
        //expanded to include the definition of square
        Expr cube = new E_Multiply(new E_Function("http://example/square", new ExprList(new ExprVar("y"))), new ExprVar("y"));
        UserDefinedFunctionFactory.getFactory().add("http://example/cube", cube, new ArrayList<Var>(cube.getVarsMentioned()));
       
        UserDefinedFunctionDefinition def = UserDefinedFunctionFactory.getFactory().get("http://example/cube");
        Expr base = def.getBaseExpr();
        Assert.assertTrue(base instanceof E_Multiply);
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