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FUNCTION xpxConditionalDeepCopyInstance (instanceId : GENERIC;
modelId : GENERIC;
options : INTEGER;
include_exclude : AGGREGATE OF GENERIC;
VAR newInstance : GENERIC)
status : INTEGER;
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The xpxConditionalDeepCopyInstance function copies an instance graph within one data model or from one data model to another. The source instance graph consists of all instances that are directly or indirectly used by the source instance. The target instance(s) will implicitly be created, hence copy between existing instances cannot be performed by this operation.
Optionally this operation can copy a partial instance graph, one complete or one partial instance.
The data model locating the source instance must be open for read access and the target data model must be open for write access, before this operation can be successfully performed. This function is equivalent to the EDMinterface function edmiConditionalDeepCopyInstance.
Remarks:
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When copying objects (entity instances & aggregate instances) |
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from one model to another model, the actual objects must be "copied" from the source model into the target model. Copied in this context means that new entity instances/aggregate instances have to be created in the target model and then the "primitive attribute/aggregate values" have to be assigned from the source objects to the new created objects in the target model. Hence, "normal" assignment statements cannot be used for this purpose. An assignment operation will only "copy" the InstanceId of the actual object resulting in "invalid InstanceId in target model". |
Arguments
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| Type | Name | Comment |
| GENERIC | instanceId | A numeric instanceID that uniquely identifies the instance to be copied in the EDMdatabase |
| GENERIC | modelId | A numeric modelID that uniquely identifies the data model locating the target instance(s). This target model must be a population of the same schema as the model that locates the <instanceId> |
| INTEGER | options | see below |
| AGGREGATE OF GENERIC | include_exclude | Array of instances or instance types (entities). The content is dependent of the value of the <options> argument. An instanceID = 0 terminates the <exclude_or_include> array |
| GENERIC | newInstance | A variable that will receive a numeric instanceID that will uniquely identify the created instance (target instance) in the EDMdatabase |
Return Value
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Options
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| Option | Comment |
INCLUDE_TYPES | Only instances of the type specified in the <exclude_or_include> argument will be copied. When the SUBTYPES options is set, additionally instances that are subtypes of the specified types in <exclude_or_include> argument can be copied. The content of the <exclude_or_include> argument must be an array of GENERIC, each defining an instance type. A SdaiEntity with the value 0 (zero) terminates the array. The option values INCLUDE_TYPES , EXCLUDE_TYPES and EXCLUDE_INSTANCES are mutually exclusive. |
EXCLUDE_TYPES | Instances of type specified in the <exclude_or_include> argument will not be copied. When the SUBTYPES options is set, additionally instances that are subtypes of the specified types in <exclude_or_include> argument will not be copied. The content of the <exclude_or_include> argument must be an array of GENERIC, each defining an instance type. A GENERIC with the value 0 (zero) terminates the array. The option values INCLUDE_TYPES , EXCLUDE_TYPES and EXCLUDE_INSTANCES are mutually exclusive. |
SUBTYPES | This option has only effect when used together with INCLUDE_TYPES or EXCLUDE_TYPES options. |
EXCLUDE_INSTANCES | The instances specified in the <exclude_or_include> argument will not be copied. The content of the <exclude_or_include> argument must be an array of GENERIC. A GENERIC with the value 0 (zero) terminates the array. The option values INCLUDE_TYPES , EXCLUDE_TYPES and EXCLUDE_INSTANCES are mutually exclusive. |
COPY_SHALLOW | Only the source instance will be copied, i.e., no instance graph will be copied. The operation will be a shallow copy operation. When the source model and the target model is the same, the instance references in the source instance will be copied to the target instance. |
EXCLUDE_ALL_INSTANCES | Only the source instance will be copied. The operation will be a shallow copy operation. No instance references will be copied, only attributes of primitive data types, including aggregates of primitive data types, will be copied. |
Example
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See also
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