TaskWrapper API

hermesTaskWrapper class

Module: hermes.taskwrapper.wrapper

The frontend for engine transformation. Holds task metadata, input parameters, and connectivity information.

Constructor

hermesTaskWrapper(name, taskJSON, Resources_path=None)

Parameter	Type	Description
name	str	Task/node name
taskJSON	dict	The node's JSON definition
Resources_path	str	Path to the Resources directory

Properties

Property	Type	Description
name	str	Task name
typeExecution	str	Node type identifier
input_parameters	dict	Resolved input parameters
Properties	dict	Constant property values
requires	list	Explicit dependency names

Methods

getRequiredTasks(taskJSON)

Extract the list of required (dependency) task names from the task JSON.

required = wrapper.getRequiredTasks(task_json)
# Returns: ["Node1", "Node2"]

Dependencies are extracted from:

• The requires field (explicit)
• Parameter references {NodeName.output.*} (implicit)

parsePath(parameter)

Parse a path expression and extract the referenced node name and field.

node_name, field = wrapper.parsePath("{CopyDirectory.output.Source}")
# Returns: ("CopyDirectory", "Source")

Specialized Wrappers

OpenFOAM Wrappers

Located in hermes/taskwrapper/specializedwrapper/openFOAMwrapper/, these provide domain-specific handling for:

• OpenFOAM mesh generation tasks
• Solver execution tasks
• Post-processing tasks

WrapperHome

Module: hermes.taskwrapper.wrapperHome

Factory that maps node types to appropriate wrapper classes:

from hermes.taskwrapper.wrapperHome import wrapperHome

wrapper_class = wrapperHome.getWrapper("openFOAM.mesh.BlockMesh")