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key: The key for the pdf, it is used as a path parameter in URL to identify for which PDF
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PDF has to generate.
baseKeyPath: The json path for the array object that we need to process.
entityIdPath: The json path for the unique field which is stored in DB. And that unique field value is mapped to file-store id, so we can directly search the pdf which was created earlier with the unique field value and there will be no need to create PDF again.
mapping: There are three mapping object for variable which are direct mapping, externalApi mapping and derived mapping.
Direct Mapping: In direction mapping we define the variable whose value can be fetched from the array object which we extracted using baseKeyPath.
ExternalApi Mapping: We use the externalApi mapping only if there is a need of values from other service response. In externalApi mapping, API endpoint has to be set properly with correct query parameter.
Derived mapping: In derived mapping, the estimation of variable characterize here is equivalent to esteem which acquired from the arithmetic operation between variable of direct mapping and externalApi mapping.
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