[
https://issues.apache.org/jira/browse/ATLAS-1082?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Shwetha G S updated ATLAS-1082:
-------------------------------
Description:
If I GET an entity, the type name for the target of a reference is the defined
type. If the actual target instance is a subclass of the defined type, then I
would prefer to get the type of the sub-class, so that I can correctly process
the referenced entity returned by the GET method.
For example:
I have a class definitions as follows:
{noformat}
{
"typeName": "CommonObject",
"definition": {
"classTypes": [
{
"hierarchicalMetaTypeName":
"org.apache.atlas.typesystem.types.ClassType",
"typeName": "CommonObject",
"attributeDefinitions": [
{
"name": "customProperties",
"dataTypeName": "array<PropertyValue>",
"multiplicity": "optional",
"isComposite": true,
"isUnique": false,
"isIndexable": false,
"reverseAttributeName": "fromObject"
}
]
}
]
},
}
{
"typeName": "PropertyValue",
"definition": {
"classTypes": [
{
"hierarchicalMetaTypeName":
"org.apache.atlas.typesystem.types.ClassType",
"typeName": "PropertyValue",
"attributeDefinitions": [
{
"name": "definition",
"dataTypeName": "PropertyDefinition",
"multiplicity": "required",
"isComposite": false,
"isUnique": false,
"isIndexable": false,
"reverseAttributeName": null
},
]
}
]
},
}
{
"typeName": "CustomPropertyDefinition",
"definition": {
"classTypes": [
{
"superTypes": [
"PropertyDefinition"
],
"hierarchicalMetaTypeName":
"org.apache.atlas.typesystem.types.ClassType",
"typeName": "CustomPropertyDefinition",
"attributeDefinitions": [
{
...
}
]
}
]
},
}
{noformat}
If I GET an instance of subtype of CommonObject, I am getting the following :
{noformat}
{
"definition": {
"jsonClass":
"org.apache.atlas.typesystem.json.InstanceSerialization$_Reference",
"id": {
"jsonClass":
"org.apache.atlas.typesystem.json.InstanceSerialization$_Id",
"id": "2bd5992f-2107-4863-a28e-21e5d9da2e5b",
"version": 0,
"typeName": "DataSet",
"state": "ACTIVE"
},
"typeName": "DataSet",
"values": {
"customProperties": [
{
"jsonClass":
"org.apache.atlas.typesystem.json.InstanceSerialization$_Reference",
"id": {
"jsonClass":
"org.apache.atlas.typesystem.json.InstanceSerialization$_Id",
"id": "c2f05c57-17be-4db3-9cf5-941b74c077eb",
"version": 0,
"typeName": "PropertyValue",
"state": "ACTIVE"
},
"typeName": "PropertyValue",
"values": {
"definition": {
"jsonClass":
"org.apache.atlas.typesystem.json.InstanceSerialization$_Id",
"id": "cd3cc767-fa82-4c8b-a5a7-0910f124f594",
"version": 0,
"typeName": "PropertyDefinition",
"state": "ACTIVE"
},
},
}
],
},
}
}
{noformat}
Please note the type of cd3cc767-fa82-4c8b-a5a7-0910f124f594 in the above GET
result is PropertyDefinition.
But, the actual type of cd3cc767-fa82-4c8b-a5a7-0910f124f594 is
CustomPropertyDefinition:
{noformat}
{
"definition": {
"jsonClass":
"org.apache.atlas.typesystem.json.InstanceSerialization$_Reference",
"id": {
"jsonClass":
"org.apache.atlas.typesystem.json.InstanceSerialization$_Id",
"id": "cd3cc767-fa82-4c8b-a5a7-0910f124f594",
"version": 0,
"typeName": "OMAS_OMRSCustomPropertyDefinition",
"state": "ACTIVE"
},
"typeName": "OMAS_OMRSCustomPropertyDefinition",
"values": {
},
}
}
{noformat}
was:
If I GET an entity, the type name for the target of a reference is the defined
type. If the actual target instance is a subclass of the defined type, then I
would prefer to get the type of the sub-class, so that I can correctly process
the referenced entity returned by the GET method.
For example:
I have a class definitions as follows:
{
"typeName": "CommonObject",
"definition": {
"classTypes": [
{
"hierarchicalMetaTypeName":
"org.apache.atlas.typesystem.types.ClassType",
"typeName": "CommonObject",
"attributeDefinitions": [
{
"name": "customProperties",
"dataTypeName": "array<PropertyValue>",
"multiplicity": "optional",
"isComposite": true,
"isUnique": false,
"isIndexable": false,
"reverseAttributeName": "fromObject"
}
]
}
]
},
}
{
"typeName": "PropertyValue",
"definition": {
"classTypes": [
{
"hierarchicalMetaTypeName":
"org.apache.atlas.typesystem.types.ClassType",
"typeName": "PropertyValue",
"attributeDefinitions": [
{
"name": "definition",
"dataTypeName": "PropertyDefinition",
"multiplicity": "required",
"isComposite": false,
"isUnique": false,
"isIndexable": false,
"reverseAttributeName": null
},
]
}
]
},
}
{
"typeName": "CustomPropertyDefinition",
"definition": {
"classTypes": [
{
"superTypes": [
"PropertyDefinition"
],
"hierarchicalMetaTypeName":
"org.apache.atlas.typesystem.types.ClassType",
"typeName": "CustomPropertyDefinition",
"attributeDefinitions": [
{
...
}
]
}
]
},
}
If I GET an instance of subtype of CommonObject, I am getting the following :
{
"definition": {
"jsonClass":
"org.apache.atlas.typesystem.json.InstanceSerialization$_Reference",
"id": {
"jsonClass":
"org.apache.atlas.typesystem.json.InstanceSerialization$_Id",
"id": "2bd5992f-2107-4863-a28e-21e5d9da2e5b",
"version": 0,
"typeName": "DataSet",
"state": "ACTIVE"
},
"typeName": "DataSet",
"values": {
"customProperties": [
{
"jsonClass":
"org.apache.atlas.typesystem.json.InstanceSerialization$_Reference",
"id": {
"jsonClass":
"org.apache.atlas.typesystem.json.InstanceSerialization$_Id",
"id": "c2f05c57-17be-4db3-9cf5-941b74c077eb",
"version": 0,
"typeName": "PropertyValue",
"state": "ACTIVE"
},
"typeName": "PropertyValue",
"values": {
"definition": {
"jsonClass":
"org.apache.atlas.typesystem.json.InstanceSerialization$_Id",
"id": "cd3cc767-fa82-4c8b-a5a7-0910f124f594",
"version": 0,
"typeName": "PropertyDefinition",
"state": "ACTIVE"
},
},
}
],
},
}
}
Please note the type of cd3cc767-fa82-4c8b-a5a7-0910f124f594 in the above GET
result is PropertyDefinition.
But, the actual type of cd3cc767-fa82-4c8b-a5a7-0910f124f594 is
CustomPropertyDefinition:
{
"definition": {
"jsonClass":
"org.apache.atlas.typesystem.json.InstanceSerialization$_Reference",
"id": {
"jsonClass":
"org.apache.atlas.typesystem.json.InstanceSerialization$_Id",
"id": "cd3cc767-fa82-4c8b-a5a7-0910f124f594",
"version": 0,
"typeName": "OMAS_OMRSCustomPropertyDefinition",
"state": "ACTIVE"
},
"typeName": "OMAS_OMRSCustomPropertyDefinition",
"values": {
},
}
}
> In GET method, return type of the actual referenced entity, instead of the
> definined type
> -----------------------------------------------------------------------------------------
>
> Key: ATLAS-1082
> URL: https://issues.apache.org/jira/browse/ATLAS-1082
> Project: Atlas
> Issue Type: Improvement
> Reporter: Prasad S Madugundu
>
> If I GET an entity, the type name for the target of a reference is the
> defined type. If the actual target instance is a subclass of the defined
> type, then I would prefer to get the type of the sub-class, so that I can
> correctly process the referenced entity returned by the GET method.
> For example:
> I have a class definitions as follows:
> {noformat}
> {
> "typeName": "CommonObject",
> "definition": {
> "classTypes": [
> {
> "hierarchicalMetaTypeName":
> "org.apache.atlas.typesystem.types.ClassType",
> "typeName": "CommonObject",
> "attributeDefinitions": [
> {
> "name": "customProperties",
> "dataTypeName": "array<PropertyValue>",
> "multiplicity": "optional",
> "isComposite": true,
> "isUnique": false,
> "isIndexable": false,
> "reverseAttributeName": "fromObject"
> }
> ]
> }
> ]
> },
> }
> {
> "typeName": "PropertyValue",
> "definition": {
> "classTypes": [
> {
> "hierarchicalMetaTypeName":
> "org.apache.atlas.typesystem.types.ClassType",
> "typeName": "PropertyValue",
> "attributeDefinitions": [
> {
> "name": "definition",
> "dataTypeName": "PropertyDefinition",
> "multiplicity": "required",
> "isComposite": false,
> "isUnique": false,
> "isIndexable": false,
> "reverseAttributeName": null
> },
> ]
> }
> ]
> },
> }
> {
> "typeName": "CustomPropertyDefinition",
> "definition": {
> "classTypes": [
> {
> "superTypes": [
> "PropertyDefinition"
> ],
> "hierarchicalMetaTypeName":
> "org.apache.atlas.typesystem.types.ClassType",
> "typeName": "CustomPropertyDefinition",
> "attributeDefinitions": [
> {
> ...
> }
> ]
> }
> ]
> },
> }
> {noformat}
> If I GET an instance of subtype of CommonObject, I am getting the following :
> {noformat}
> {
> "definition": {
> "jsonClass":
> "org.apache.atlas.typesystem.json.InstanceSerialization$_Reference",
> "id": {
> "jsonClass":
> "org.apache.atlas.typesystem.json.InstanceSerialization$_Id",
> "id": "2bd5992f-2107-4863-a28e-21e5d9da2e5b",
> "version": 0,
> "typeName": "DataSet",
> "state": "ACTIVE"
> },
> "typeName": "DataSet",
> "values": {
> "customProperties": [
> {
> "jsonClass":
> "org.apache.atlas.typesystem.json.InstanceSerialization$_Reference",
> "id": {
> "jsonClass":
> "org.apache.atlas.typesystem.json.InstanceSerialization$_Id",
> "id": "c2f05c57-17be-4db3-9cf5-941b74c077eb",
> "version": 0,
> "typeName": "PropertyValue",
> "state": "ACTIVE"
> },
> "typeName": "PropertyValue",
> "values": {
> "definition": {
> "jsonClass":
> "org.apache.atlas.typesystem.json.InstanceSerialization$_Id",
> "id": "cd3cc767-fa82-4c8b-a5a7-0910f124f594",
> "version": 0,
> "typeName": "PropertyDefinition",
> "state": "ACTIVE"
> },
> },
> }
> ],
> },
> }
> }
> {noformat}
> Please note the type of cd3cc767-fa82-4c8b-a5a7-0910f124f594 in the above GET
> result is PropertyDefinition.
> But, the actual type of cd3cc767-fa82-4c8b-a5a7-0910f124f594 is
> CustomPropertyDefinition:
> {noformat}
> {
> "definition": {
> "jsonClass":
> "org.apache.atlas.typesystem.json.InstanceSerialization$_Reference",
> "id": {
> "jsonClass":
> "org.apache.atlas.typesystem.json.InstanceSerialization$_Id",
> "id": "cd3cc767-fa82-4c8b-a5a7-0910f124f594",
> "version": 0,
> "typeName": "OMAS_OMRSCustomPropertyDefinition",
> "state": "ACTIVE"
> },
> "typeName": "OMAS_OMRSCustomPropertyDefinition",
> "values": {
> },
> }
> }
> {noformat}
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