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API / Apache Wicket Interview questions

What is the purpose of PageParameters?

PageParameters is Wicket's typed container for the data carried in a URL — the equivalent of query string or path parameters, but wrapped in an API that avoids manual request-parsing.

It's passed into a bookmarkable page's constructor and offers typed accessors like get("term").toString() or get("page").toInt(), handling the parsing and letting the page code work with real Java types instead of raw strings pulled from a servlet request. Values can arrive as either named parameters (?term=wicket&page=2) or as indexed/positional segments when a page is mounted to a pattern like /search/${term}.

Because the same PageParameters object also flows into setResponsePage() calls and link construction, it's the mechanism that keeps a bookmarkable page's constructor, its mounted URL, and any links pointing to it all working from one consistent, typed representation of "what data does this URL need."

What problem does PageParameters solve compared to reading a raw servlet request directly?
In what two forms can values arrive in a PageParameters object?

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