Examples of org.drools.compiler.lang.descr.ExprConstraintDescr

org.drools.compiler.lang.descr.ExprConstraintDescr
This represents a constraint in a pattern defined by an arbitrary expression. The constraint can be any valid java/mvel expression.

        final PatternDescr col = (PatternDescr) rule.getLhs().getDescrs().get( 0 );
        assertEquals( "Foo",
                      col.getObjectType() );
        assertEquals( 1,
                      col.getConstraint().getDescrs().size() );
        final ExprConstraintDescr fld = (ExprConstraintDescr) col.getConstraint().getDescrs().get( 0 );


        assertEquals( "bar == Foo.BAR",
                      fld.getExpression() );
    }

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        final PatternDescr pattern = (PatternDescr) rule.getLhs().getDescrs().get( 0 );
        final List< ? > constraints = pattern.getConstraint().getDescrs();
        assertEquals( 1,
                      constraints.size() );


        final ExprConstraintDescr predicate = (ExprConstraintDescr) constraints.get( 0 );
        assertEquals( "eval( $var.equals(\"xyz\") )",
                        predicate.getExpression() );
    }

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                                              text )).getLhs();


        assertEquals( 2,
                      descrs.getDescrs().size() );
        PatternDescr pat = (PatternDescr) descrs.getDescrs().get( 1 );
        ExprConstraintDescr fieldConstr = (ExprConstraintDescr) pat.getConstraint().getDescrs().get( 0 );


        assertEquals( "city memberOf $cities",
                      fieldConstr.getExpression() );
    }

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                                              text )).getLhs();


        assertEquals( 2,
                      descrs.getDescrs().size() );
        PatternDescr pat = (PatternDescr) descrs.getDescrs().get( 1 );
        ExprConstraintDescr fieldConstr = (ExprConstraintDescr) pat.getConstraint().getDescrs().get( 0 );


        assertEquals( "city not memberOf $cities",
                      fieldConstr.getExpression() );
    }

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        assertEquals( "Person",
                      pattern.getObjectType() );
        assertEquals( 1,
                      pattern.getConstraint().getDescrs().size() );


        ExprConstraintDescr fld = (ExprConstraintDescr) pattern.getConstraint().getDescrs().get( 0 );
        assertEquals( "age > 30 && < 40",
                      fld.getExpression() );


        // the second col, with 2 fields, the first with 2 restrictions, the
        // second field with one
        pattern = (PatternDescr) rule.getLhs().getDescrs().get( 1 );
        assertEquals( "Vehicle",
                      pattern.getObjectType() );
        assertEquals( 2,
                      pattern.getConstraint().getDescrs().size() );


        fld = (ExprConstraintDescr) pattern.getConstraint().getDescrs().get( 0 );
        assertEquals( "type in ( \"sedan\", \"wagon\" )",
                      fld.getExpression() );


        // now the second field
        fld = (ExprConstraintDescr) pattern.getConstraint().getDescrs().get( 1 );
        assertEquals( "age < 3",
                      fld.getExpression() );


    }

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        assertEquals( "Person",
                      pattern.getObjectType() );
        assertEquals( 1,
                      pattern.getConstraint().getDescrs().size() );


        ExprConstraintDescr fld = (ExprConstraintDescr) pattern.getConstraint().getDescrs().get( 0 );
        assertEquals( "age > 30 && < 40",
                      fld.getExpression() );


        // the second col, with 2 fields, the first with 2 restrictions, the
        // second field with one
        pattern = (PatternDescr) rule.getLhs().getDescrs().get( 1 );
        assertEquals( "Vehicle",
                      pattern.getObjectType() );
        assertEquals( 2,
                      pattern.getConstraint().getDescrs().size() );


        fld = (ExprConstraintDescr) pattern.getConstraint().getDescrs().get( 0 );
        assertEquals( "type not in ( \"sedan\", \"wagon\" )",
                      fld.getExpression() );


        // now the second field
        fld = (ExprConstraintDescr) pattern.getConstraint().getDescrs().get( 1 );
        assertEquals( "age < 3",
                      fld.getExpression() );


    }

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        PatternDescr pattern = (PatternDescr) ((RuleDescr) parse( "rule",
                                                                  text )).getLhs().getDescrs().get( 0 );


        assertEquals( 1,
                      pattern.getDescrs().size() );
        ExprConstraintDescr fcd = (ExprConstraintDescr) pattern.getDescrs().get( 0 );
        assertEquals( "age < 42 && location==\"atlanta\"",
                      fcd.getExpression() );
    }

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        PatternDescr pattern = (PatternDescr) ((RuleDescr) parse( "rule",
                                                                  text )).getLhs().getDescrs().get( 0 );


        assertEquals( 1,
                      pattern.getDescrs().size() );
        ExprConstraintDescr fcd = (ExprConstraintDescr) pattern.getDescrs().get( 0 );
        assertEquals( "age < 42 || location==\"atlanta\"",
                      fcd.getExpression() );
    }

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                                                         text )).getLhs();


        assertEquals( 1,
                      descrs.getDescrs().size() );
        PatternDescr pat = (PatternDescr) descrs.getDescrs().get( 0 );
        ExprConstraintDescr fieldConstr = (ExprConstraintDescr) pat.getConstraint().getDescrs().get( 0 );


        assertEquals( "bar > 1 || == 1",
                      fieldConstr.getExpression() );
    }

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        assertEquals( 1,
                      eventB.getConstraint().getDescrs().size() );
        assertEquals( 1,
                      eventB.getConstraint().getDescrs().size() );


        final ExprConstraintDescr fcdB = (ExprConstraintDescr) eventB.getConstraint().getDescrs().get( 0 );
        assertEquals( "this after[1,10] $a || this not after[15,20] $a",
                      fcdB.getExpression() );


        final PatternDescr eventC = (PatternDescr) rule.getLhs().getDescrs().get( 2 );
        assertEquals( "$c",
                      eventC.getIdentifier() );
        assertEquals( "EventC",
                      eventC.getObjectType() );
        assertEquals( 1,
                      eventC.getConstraint().getDescrs().size() );
        final ExprConstraintDescr fcdC = (ExprConstraintDescr) eventC.getConstraint().getDescrs().get( 0 );
        assertEquals( "this finishes $b",
                      fcdC.getExpression() );


        final PatternDescr eventD = (PatternDescr) rule.getLhs().getDescrs().get( 3 );
        assertEquals( "$d",
                      eventD.getIdentifier() );
        assertEquals( "EventD",
                      eventD.getObjectType() );
        assertEquals( 1,
                      eventD.getConstraint().getDescrs().size() );
        final ExprConstraintDescr fcdD = (ExprConstraintDescr) eventD.getConstraint().getDescrs().get( 0 );
        assertEquals( "this not starts $a",
                      fcdD.getExpression() );


        final PatternDescr eventE = (PatternDescr) rule.getLhs().getDescrs().get( 4 );
        assertEquals( "$e",
                      eventE.getIdentifier() );
        assertEquals( "EventE",
                      eventE.getObjectType() );
        assertEquals( 1,
                      eventE.getConstraint().getDescrs().size() );


        ExprConstraintDescr fcdE = (ExprConstraintDescr) eventE.getConstraint().getDescrs().get( 0 );
        assertEquals( "this not before[1, 10] $b || after[1, 10] $c && this after[1, 5] $d",
                      fcdE.getExpression() );
    }

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