YAMLClass-class {PTXQC}

Query a YAML object for a certain parameter.

Description

If the object has the param, then return it. If the param is unknown, create it with the given default value and return the default.

Fields

yamlObj

A Yaml object as created by yaml.load

Methods

getYAML(param_name, default, min = NA, max = NA)

Query this YAML object for a certain parameter and return its value. If it does not exist it is created with a default value. An optional min/max range can be specified and will be enforced if the value is known (default will be used upon violation).

setYAML(param_name, value)

Set a YAML parameter to a certain value. Overwrites the old value or creates a new entry if hithero unknown.

writeYAML(filename)

Write YAML config (including some documentation) to a YAML file. Returns TRUE on success (always), unless writing the file generates an error.

Examples

    yc = YAMLClass$new(list())
    val = yc$getYAML("cat$subCat", "someDefault")
    val  ## someDefault
    val = yc$setYAML("cat$subCat", "someValue")
    val  ## someValue
    yc$getYAML("cat$subCat", "someDefault") ## still 'someValue' (since its set already)