docs/modelingconcepts/expression.rst

   1 .. This work is a derivative of https://wiki.onap.org/display/DW/Modeling+Concepts#Concepts-198012600 by IBM
   2 .. used under Creative Commons Attribution 4.0 International License.
   3 .. http://creativecommons.org/licenses/by/4.0
   4 .. Copyright (C) 2020 Deutsche Telekom AG.
   5
   6
   7 .. _expression:
   8
   9 Expression
  10 -------------------------------------
  11
  12 TOSCA provides for a set of functions to reference elements within the template or to retrieve runtime values.
  13
  14 **Below is a list of supported expressions**
  15
  16 .. tabs::
  17
  18    .. tab:: get_input
  19
  20       **get_input**
  21
  22       The **get_input** function is used to retrieve the values of properties declared
  23       within the inputs section of a TOSCA Service Template.
  24
  25       Within CDS, this is mainly Workflow inputs.
  26
  27       `TOSCA specification
  28       <http://docs.oasis-open.org/tosca/TOSCA-Simple-Profile-YAML/v1.2/csd01/TOSCA-Simple-Profile-YAML-v1.2-csd01.html#_Toc494454178>`_
  29
  30       **Example:**
  31
  32       `<https://github.com/onap/ccsdk-cds/blob/master/components/model-catalog/blueprint-model/test-blueprint/golden/Definitions/golden-blueprint.json#L210>`_
  33
  34       .. code-block:: JSON
  35
  36          "resolution-key": {
  37          "get_input": "resolution-key"
  38          }
  39
  40    .. tab:: get_property
  41
  42       **get_property**
  43
  44       The **get_property** function is used to retrieve property values between modelable
  45       entities defined in the same service template.
  46
  47       `TOSCA specification
  48       <http://docs.oasis-open.org/tosca/TOSCA-Simple-Profile-YAML/v1.2/csd01/TOSCA-Simple-Profile-YAML-v1.2-csd01.html#_Toc494454178>`_
  49
  50       **Example:**
  51
  52       TBD
  53
  54    .. tab:: get_attribute
  55
  56       **get_attribute**
  57
  58       The **get_attribute** function is used to retrieve the values of named attributes declared
  59       by the referenced node or relationship template name.
  60
  61       `TOSCA specification
  62       <http://docs.oasis-open.org/tosca/TOSCA-Simple-Profile-YAML/v1.2/csd01/TOSCA-Simple-Profile-YAML-v1.2-csd01.html#_Toc494454178>`_
  63
  64       **Example:**
  65
  66       `<https://github.com/onap/ccsdk-cds/blob/master/components/model-catalog/blueprint-model/test-blueprint/golden/Definitions/golden-blueprint.json#L64-L67>`_
  67
  68       .. code-block:: JSON
  69
  70          "get_attribute": [
  71             "resource-assignment",
  72             "assignment-params"
  73          ]
  74
  75    .. tab:: get_operation_output
  76
  77       **get_operation_output**
  78
  79       The **get_operation_output** function is used to retrieve property values between modelable
  80       entities defined in the same service template.
  81
  82       `TOSCA specification
  83       <http://docs.oasis-open.org/tosca/TOSCA-Simple-Profile-YAML/v1.2/csd01/TOSCA-Simple-Profile-YAML-v1.2-csd01.html#_Toc494454180>`_
  84
  85       **Example:**
  86
  87       TBD
  88
  89    .. tab:: get_artifact
  90
  91       **get_artifact**
  92
  93       The **get_artifact** function is used to retrieve property values between modelable
  94       entities defined in the same service template.
  95
  96       `TOSCA specification
  97       <http://docs.oasis-open.org/tosca/TOSCA-Simple-Profile-YAML/v1.2/csd01/TOSCA-Simple-Profile-YAML-v1.2-csd01.html#_Toc494454182>`_
  98
  99       **Example:**
 100
 101       TBD