The SequentialStringFilter is used in several demos:

• In the HTMLScraperFilter demo as part of the Snippet extraction process: Combines a URLContentFilter that retrieves the snippet with an HTMLFilter / ExtractHTMLSectionFilter EventProcessor that gets the HTML section containing the snippet.
  

    <StringFilter class="com.raritantechnologies.utils.filter.SequentialStringFilter" >
  
      <!-- ============================================================== -->
      <!-- URLContentFilter:  Transforms the URL into its content         -->
      <!-- ============================================================== -->
      <StringFilter class="com.raritantechnologies.utils.filter.URLContentFilter"
                    useURLSocket="false"
                    requestMethod="get" />
  
        <!-- =================================================================== -->
        <!-- HTMLFilter: Extracts the portion of the HTML document between the   -->
        <!--  #BeginEditable "comment" comment and the #EndEditable HTML comment -->
        <!-- =================================================================== -->
        <StringFilter class="com.raritantechnologies.HTML.filter.HTMLFilter" >
  
          <EventProcessor class="com.raritantechnologies.HTML.filter.ExtractHTMLSectionFilter" >
      
            <StartComparator class="com.raritantechnologies.utils.comparators.AndComparator" >
              <Comparator class="com.raritantechnologies.utils.comparators.StringContainsComparator"
                          contains="#BeginEditable" />
              <Comparator class="com.raritantechnologies.utils.comparators.StringContainsComparator"
                          contains="content" />
            </StartComparator>
  
          <EndComparator class="com.raritantechnologies.utils.comparators.StringContainsComparator"
                         contains="#EndEditable" />
        </EventProcessor>
  
      </StringFilter>
  
    </StringFilter>
  
  

• In the Google SOAPSearchSource to clean up encoded html markup that Google puts into the XML response so that it displays correctly. (common XML/HTML problem with the '<' character.)
  

  
    <!-- unencode < and > markup so that this displays as intended -->
    <OutputFilter class="com.raritantechnologies.utils.filter.SequentialStringFilter" >
      <StringFilter class="com.raritantechnologies.utils.filter.ReplaceSubstringFilter" 
                    inPattern="&lt;" outPattern="<" replace="ALL" />
      <StringFilter class="com.raritantechnologies.utils.filter.ReplaceSubstringFilter" 
                    inPattern="&gt;" outPattern=">" replace="ALL" />
    </OutputFilter>
  

• In the HTMLFilter demo as part of a complex hyperlink rewriting operation used to integrate the standard Javadoc pages with example pages like this one:
  

    <StringFilter class="com.raritantechnologies.utils.filter.SequentialStringFilter" >
  
      <StringFilter class="com.raritantechnologies.utils.filter.RegExprStringFilter"
                    inPattern="(.*)/com/raritantechnologies(.*)"
                    outPattern="/FrameworkDocumentation/JavadocPage.jsp?javadoc=/doc/com/raritantechnologies$2" />
  
      <StringFilter class="com.raritantechnologies.utils.filter.ConcatenateFilter" >
  
      . . .
    </StringFilter>