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MEOop
 | areaID:
int
| | objectID:
int |
A handle to a GOPPRR conceptual or
representational instance in the repository. A concept can be a Graph, Object,
Relationship, Role, Port, Property or Binding. A representation can be a
Diagram, Matrix or Table, or an object or binding representation. Generally, an
MEOop is either built based on output from an oid command in a generator (as in
the Watch example), or then obtained as an answer to a previous API
command.
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MEAny
| meType:
string
| | meValue:
string |
MEAny is used to handle polymorphism,
where a parameter can be of several different types. E.g. the value of a
Property might be a String, Text, Integer, OrderedCollection, MEOop for an
object as a property value etc. The data type of the value is stored as a string
in meType, and a string representation of the value is stored in meValue. Below
each possible meType is listed along with the string representation for its
meValue:
| For
MEOop: 3_12345 (areaID, underscore, objectID)
any.meType="MEOop";
any.meValue="3_12345"; | | For
String or Text: 'a string' (note the quotes; embedded quotes are doubled)
any.meType="String";
any.meValue="'isn''t'"; | | For
Integer: 34 (note you must convert this string value to an integer)
any.meType="Integer";
any.meValue="34"; | | For
Number: meValue string is a decimal float representation with ‘.’ as
decimal point and ‘e’ as mantissa separator (no spaces)
any.meType="Number";
any.meValue="2.998e8"; | | For
Boolean: meValue string is true or false or ‘1’ or ‘0’
(as strings)
any.meType="Boolean";
any.meValue="true"; | | For
MENull: meValue string is empty (can also accept any content, e.g. nil)
any.meType="MENull";
any.meValue=""; | | For
Point: 10,20 (x co-ordinate, y co-ordinate: note no space after the comma)
any.meType="Point";
any.meValue="10,20"; | | For
OrderedCollection: space-separated representations of MEOop, String, Integer,
Number or Point
any.meType="OrderedCollection";
any.meValue="3_123 3_125 3_127";
any.meValue="'one' 'two' 'three'";
any.meValue="1 2
3"; | | For
TimestampUTC: meValue string is yyyy-mm-ddThh:mm:ss.fffZ with time in UTC (date
must be supplied in full, but time units can be left off from the end, and time
zone is optional and ignored, being always UTC)
any.meType="TimestampUTC";
any.meValue="2016-12-31T23:59"; |
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METype
| name:
string |
Represents a type from the metamodel.
Can be either the internal name (e.g. OPRRObj_Use_Case_sysadmin_12387234) or the
user-visible name (e.g. Use Case). MetaEdit+ will return METypes with the
internal name; the user-visible name can be obtained from an METype with the
typeName method.
When MetaEdit+ receives an METype, it
will look up the name first as an internal name, and if that fails, as a
user-visible name across all Graph, Object, Relationship, Role, Port and
Property types (in that order, depth first). Since the internal name of these
metatypes is the same as the user-visible name (except for OPRRObj for Object),
an METype with name="Role" will find the Role metatype, not a user-created
object type called “Role”. To look up an object type called
“Role”, “Port” etc. you may use its internal name, or
the subTypeNamed() method:
METype
objMetaType=new METype();
objMetaType.name="OPRRObj";
METype
myType=api.subTypeNamed(objMetaType, "Role");
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MENull
Represents the nil value, e.g. the return value from a command
that returns nothing, or (within an MEAny) the value of a property whose data
type is an object type, but which has no object assigned yet as a
value.
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