How can you override the default parameter settings for the Generic Reader when dealing with multiple formats?

How can you override the default parameter settings for the Generic Reader when dealing with multiple formats?

• A. It can't be overcome. Default reader format parameters are always used.
• B. Adding a Reader as a Resource, and set parameters there.
• C. Adding a ParameterFetcher transformer to the workspace.
• D. Using default parameters.

Answer: (B)

When a Generic Reader must handle multiple formats, you override the per-format defaults by saving the reader as a Resource and configuring its parameters there. A Resource stores a separate set of parameter values for that reader instance, so you can create one resource for each format and assign the format-specific settings (delimiters, encoding, schema handling, etc.) inside that resource. Then, when you read a particular format, you use the corresponding resource, and the reader applies the resource’s parameters instead of the workspace-wide defaults. This isolates and simplifies per-format customization across multiple formats. Other options don’t achieve this. A ParameterFetcher doesn’t change the reader’s per-format defaults; it only brings parameters into the workspace at run time. Relying on default parameters ignores the needs of different formats. And the statement that defaults cannot be overridden is incorrect.

When a Generic Reader must handle multiple formats, you override the per-format defaults by saving the reader as a Resource and configuring its parameters there. A Resource stores a separate set of parameter values for that reader instance, so you can create one resource for each format and assign the format-specific settings (delimiters, encoding, schema handling, etc.) inside that resource. Then, when you read a particular format, you use the corresponding resource, and the reader applies the resource’s parameters instead of the workspace-wide defaults. This isolates and simplifies per-format customization across multiple formats.

Other options don’t achieve this. A ParameterFetcher doesn’t change the reader’s per-format defaults; it only brings parameters into the workspace at run time. Relying on default parameters ignores the needs of different formats. And the statement that defaults cannot be overridden is incorrect.