ParameterList

See the following sections to parse parameter-list input or format parameter-list output.

• Setting Stream Properties
• Defining Stream Fields
• Using String Arrays

Setting Stream Properties

ParameterList streams don't have properties. To configure ParameterList streams, define the stream fields to map to parameter names and values. You can map multivalued HTTP parameters to string arrays.

Defining Stream Fields

Define the field name and data type to define a field in a ParameterList stream.

Field name	Specify the field name.
Data type	Select String, Boolean, Integer, Double, Decimal, DateTime, Binary, or String[].

Validating the field names

Note the following conditions for a field name to be valid:

• / can't be used.
• There isn't a limit to the length of the name.
• The name is case sensitive.
• You can use non-ASCII characters and the single-byte blank.

Using String Arrays

You can process multivalued HTTP parameters using string arrays: select String[] for the field's Type property.

Mapping Multivalued Parameters to Records

You can use the mapper component to work with a ParameterList stream as a record. When you have selected the String[] type for one or more fields, as many records are output as the length of the longest array field.

Nonarray values are repeated in every record. If the array length is smaller than the record number, the missing fields are output as null fields.

Example

See below for an example of how you can obtain the output of a ParameterList stream that has a multivalued parameter. Shown below are parameter data that have a 3-value array and a 5-value array.

Field name	Data type	Value
Field1	String	aaa
Field2	String	bbb
Field3	String[]	ccc, ddd, eee
Field4	String[]	fff, ggg, hhh, iii, jjj

Below is the output for the preceding table, which contains 5 records:

aaa, bbb, ccc, fff
aaa, bbb, ddd, ggg
aaa, bbb, eee, hhh
aaa, bbb, null, iii
aaa, bbb, null, jjj