Editing Final Report 2011 (section)

===Implementation===
The integration of the pattern matching module into the web crawler module was achieved through utilising Java generics with the ''SearchManager'' interface as defined in the [[Final Report 2011#Pattern Matcher|Pattern Matcher]] section. The OTS crawler4j provides a function to retrieve web page content and this was used to pass page content to the pattern matcher.

The integration of the system into the GUI was somewhat more involved. A multi-threading solution was required to enable control of the web crawler through the GUI as discussed in the Technical Challenges.

The Testing phase of the Web Crawler module revealed additional functionality provided by the OTS crawler. During the implementation phase, some of these features were integrated into the GUI to add a greater dimension of user control. These features were “Limit” on the Seed tab, which limits crawling to web page URLs starting with the specified limit; “No. Pages” on the Pattern (Scope) tab, which stops the crawler after the specified number of page downloads; and “Depth” on the Pattern tab, which defines how deep the crawler goes into a stack of links before giving up on that line of inquiry. These features can be seen in the Design images, above.