ParameterDirectives

When to use which parameter directive?

Usually, you want to use the high-level parameters-scala directive. When you need more low-level access you can use the table below to decide which directive to use which shows properties of different parameter directives.

directive	level	ordering	multi
parameter	high	no	no
parameters-scala	high	no	yes
parameterMap	low	no	no
parameterMultiMap	low	no	yes
parameterSeq	low	yes	yes

level

high-level parameter directives extract subset of all parameters by name and allow conversions and automatically report errors if expectations are not met, low-level directives give you all parameters at once, leaving all further processing to you

ordering

original ordering from request URL is preserved

multi

multiple values per parameter name are possible