How to Get the First Element From a List in Camel JXPath

Apache's Camel is a development framework, or programming resource library, that enables programmers to define how their applications route messages and other information from their data sources. Camel's JXPath support enables the framework to use XPath commands to filter data. If you only need the first bit of information from your data source, you can use JXPath to retrieve only what you need.


    • 1

      Open your project's Spring XML file, using Microsoft Notepad or an XML editor. Add a reference to the Javabean that contains the data you'd like to retrieve. Type "public class bean name {." Substitute "bean name" with the name of the bean you'd like to call on.

    • 2

      Type in the desired method of retrieval on the next line, using hanging indentation. Type "public sub-cass getobject (){." Substitute "sub-class" with the sub-group of data you'd like to retrieve from the bean. Substitute "object" in "getobject" with element you'd like to retrieve.

    • 3

      Close off your statements. Type "..." on the next line, using two hanging indents. Type a "}" on the next line, using one hanging indent. Type "}" on the next line without any indentation.

    • 4

      Type "Beanname abbreviation = new beanname ();" onto the next line of the document. Substitute "beanname" and "abbreviation" with the name of the bean and its abbreviation. Type "..." onto the next line.

    • 5

      Route your data request through the JXPath context. Type "JXPathContext context = JXPathContext.newContext(bean abbreviation);" onto the next line of the file -- substitute "bean abbreviation" with the abbreviation of the bean.

    • 6

      Parse your string of data. Type String parsedrequest = (String)context.getValue("fullrequest"); onto the next line. Substitute "parsedrequest" with the parsed Java string version of the data you'd like to retrieve -- for example, you'd parse a request for "last name" to "lname." Replace "fullrequest" with the unparsed version of the request.

    • 7

      Save your XML file, then close it.

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