| 1 | |
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| 2 | :- category(attributes). |
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| 3 | |
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| 4 | :- info([ |
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| 5 | version is 1.0, |
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| 6 | author is 'Paulo Moura', |
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| 7 | date is 2000/7/24, |
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| 8 | comment is 'Dynamic attributes dictionary.']). |
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| 9 | |
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| 10 | :- public(attribute/2). |
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| 11 | :- mode(attribute(?nonvar, ?nonvar), zero_or_more). |
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| 12 | :- info(attribute/2, |
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| 13 | [comment is 'Returns, by backtracking, all pairs of attribute-values.', |
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| 14 | argnames is ['Attribute', 'Value']]). |
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| 15 | |
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| 16 | :- public(attributes/1). |
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| 17 | :- mode(attributes(-list), one). |
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| 18 | :- info(attributes/1, |
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| 19 | [comment is 'List of all pairs of attribute-values.', |
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| 20 | argnames is ['Attributes']]). |
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| 21 | |
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| 22 | :- private(attribute_/2). |
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| 23 | :- dynamic(attribute_/2). |
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| 24 | :- mode(attribute_(?nonvar, ?nonvar), zero_or_more). |
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| 25 | :- info(attribute_/2, |
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| 26 | [comment is 'Stores attributes values.', |
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| 27 | argnames is ['Attribute', 'Value']]). |
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| 28 | |
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| 29 | :- public(del_attribute/2). |
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| 30 | :- mode(del_attribute(?nonvar, ?nonvar), zero_or_more). |
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| 31 | :- info(del_attribute/2, |
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| 32 | [comment is 'Deletes a matching attribute-value pair.', |
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| 33 | argnames is ['Attribute', 'Value']]). |
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| 34 | |
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| 35 | :- public(del_attributes/2). |
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| 36 | :- mode(del_attributes(@term, @term), one). |
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| 37 | :- info(del_attributes/2, |
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| 38 | [comment is 'Deletes all matching attribute-value pairs.', |
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| 39 | argnames is ['Attribute', 'Value']]). |
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| 40 | |
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| 41 | :- public(set_attribute/2). |
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| 42 | :- mode(set_attribute(+nonvar, +nonvar), one). |
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| 43 | :- info(set_attribute/2, |
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| 44 | [comment is 'Sets an attribute value.', |
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| 45 | argnames is ['Attribute', 'Value']]). |
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| 46 | |
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| 47 | :- public(set_attributes/1). |
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| 48 | :- mode(set_attributes(+list), one). |
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| 49 | :- info(set_attributes/1, |
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| 50 | [comment is 'Sets a list of attribute-value pairs.', |
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| 51 | argnames is ['Attributes']]). |
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| 52 | |
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| 53 | attribute(Attribute, Value) :- |
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| 54 | ::attribute_(Attribute, Value). |
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| 55 | |
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| 56 | attributes(Attributes) :- |
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| 57 | findall(Attribute, ::attribute_(Attribute, _), Attributes). |
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| 58 | |
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| 59 | del_attribute(Attribute, Value) :- |
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| 60 | ::retract(attribute_(Attribute, Value)). |
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| 61 | |
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| 62 | del_attributes(Attribute, Value) :- |
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| 63 | ::retractall(attribute_(Attribute, Value)). |
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| 64 | |
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| 65 | set_attribute(Attribute, Value) :- |
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| 66 | ::retractall(attribute_(Attribute, _)), |
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| 67 | ::assertz(attribute_(Attribute, Value)). |
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| 68 | |
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| 69 | set_attributes([]). |
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| 70 | set_attributes([Attribute-Value| Attributes]) :- |
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| 71 | ::retractall(attribute_(Attribute, _)), |
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| 72 | ::assertz(attribute_(Attribute, Value)), |
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| 73 | set_attributes(Attributes). |
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| 74 | |
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| 75 | :- end_category. |
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