XQuery Development Tools/Where to Start

What is the "Where to Start" page?

This page gathers a list of features of XQDT and the place in the project where this feature is implemented or where the developer should first look and start understanding and debugging the functionality.

Feature table

NOTE: For all the classes below we have omitted the fully qualified name to keep the descriptions shorter. For example, XQDTInterpreterInstallType refers to org.eclipse.wst.xquery.launching.XQDTInterpreterInstallType. Eclipse helps you find these types with the "Open Type" dialog (available under the "Navigate" menu or by pressing the key combination: Ctrl-Shift-T). In case you find more classes having the same name (though not the case so far), just choose the one from our project, that is, having a package name starting with: org.eclipse.wst.xquery.

XQDT features

Feature name	Feature description	Plug-ins involved	Need to implement	Sample implementation
New XQuery Processor Type	A new XQuery processor type (called "interpreter" in DLTK terms) allows you to define you own logic for: execution environment (local, like in Zorba or Saxon; or remote, like MarkLogic Server) processor validation (e.g. only allow executables called zorba.exe to be added as the Zorba processor type) launching configuration (e.g. add custom launching parameters to your processor type upon execution)	org.eclipse.wst.xquery.launching org.eclipse.wst.xquery.launching.your_launching_plugin	XQDTInterpreterInstallType XQDTInterpreterInstall add the org.eclipse.dltk.launching.interpreterInstallTypes extension point in your_launching_plugin and provide a reference to your implementation of XQDTInterpreterInstallType	the org.eclipse.wst.xquery.launching.zorba plug-in ZorbaInstallType ZorbaInstall the org.eclipse.wst.xquery.launching plug-in XQDTJavaInterpreterInstallType XQDTJavaInterpreterInstall
Custom "Add Interpreter" Dialog	The XQuery processors might be very different in terms of where they are located (local/remote), the libraries needed to run, the framework they are based on, etc. The default AddLocalInterpreterDialogBlock might not be satisfactory for some processors due to the string assumption that the processor must have executable file available on the local machine. To allow other processor types, one might need to define his own UI controls and logic when adding such a processor in XQDT. XQDT allows vendors to provide an entire UI component to meet the processor's need.	org.eclipse.wst.xquery.debug.ui org.eclipse.wst.xquery.debug.ui.your_debug_ui_plugin	AbstractAddInterpreterDialogBlock add the org.eclipse.wst.xquery.debug.ui.interpreterInstallTypeAddDialogBlock extension point in your_debug_ui_plugin, provide a reference to your implementation of AbstractAddInterpreterDialogBlock and associate it to your IInterpreterInstallType ID.	plug-in org.eclipse.wst.xquery.ui.zorba ZorbaTemplateProposalComputer ZorbaTemplateCompletionProcessor ZorbaTemplateAccess ZorbaTemplateContentType ZorbaTemplateContext<code>
Running XQuery	Having new XQuery processor type defined (an <code>IInterpreterType), a vendor must also provide the logic on how to start the process executing the XQuery code. This will build the command line that will be executed by the operating system.	org.eclipse.wst.xquery.launching org.eclipse.wst.xquery.launching.your_launching_plugin	IInterpreterRunner or AbstractInterpreterRunner referenced from your IInterpreterInstall. This runner is only needed for the "run" mode (not for "debug" mode). See the XQDTJavaInterpreterInstall example for a sample implementation.	the org.eclipse.wst.xquery.launching.zorba plug-in ZorbaInstall ZorbaRunner the org.eclipse.wst.xquery.launching plug-in XQDTJavaInterpreterInstall XQDTJavaInterpreterRunner
Semantic Checker	After the syntax check is complete without errors, a particular XQuery processor is allowed to report other errors in the XQuery code. E.g. function not available, namespace not declared, variable not defined, or even more complex problems that a particular processor may detect.	org.eclipse.wst.xquery.core org.eclipse.wst.xquery.launching	ISemanticValidator or AbstractLocalInterpreterSemanticValidator your IInterpreterInstall needs to implement ISemanticValidatingInterpreterInstall and provide an instance of your ISemanticValidator	ZorbaSemanticValidator MarkLogicSemanticValidator
URI Resolving	The XQuery processors resolve the module/schema URIs in an implementation specific way. This feature allows vendors to provide their own logic for URI resolving to match their processors's logic. The URI resolving is used for example in code assist in order to find the functions for code completion.	org.eclipse.wst.xquery.core org.eclipse.wst.xquery.launching org.eclipse.wst.xquery.launching.your_launching_plugin	IXQDTUriResolver or XQDTUriResolver add the org.eclipse.wst.xquery.core.uriResolver extension point in your_launching_plugin and provide a reference to your implementation of IXQDTUriResolver	ZorbaUriResolver MarkLogicUriResolver
Vendor code templates	Vendors can provide their own templates (code snippets) to be added to the default set of templates shipped with the core of XQDT. Moreover, vendors can resolve template variables in different ways. E.g. providing only in scope variables in a place where a variable is expected, etc.	org.eclipse.wst.xquery.ui.your_ui_plugin	ScriptCompletionProposalComputer add the org.eclipse.dltk.ui.scriptCompletionProposalComputer extension point in your_ui_plugin and provide a reference to your implementation of ScriptCompletionProposalComputer. See the Zorba implementation for the complete extension point implementation. ScriptTemplateCompletionProcessor ScriptTemplateAccess (reads and caches the templates from disk) ScriptTemplateContextType add your ScriptTemplateContextType to the org.eclipse.ui.editors.templates extension point in your_ui_plugin. In the same extension point, provide also the .xml and .properties files where the templates will be read from. See the Zorba implementation for the complete extension point implementation. ScriptTemplateContext (allows you to resolve template variables)	plug-in org.eclipse.wst.xquery.ui.zorba ZorbaTemplateProposalComputer ZorbaTemplateCompletionProcessor ZorbaTemplateAccess ZorbaTemplateContentType ZorbaTemplateContext<code>