eXist-db in <oXygen/>?
Dear oxygen-user list, I've constructed an XQuery script for eXist-db that uses the function request:get-parameter(). It works as expected in eXide. I have established a data source connection between <oXygen/> (XML Editor 21.1, build 2019120214, running on MacOS Mojave) and eXist-db (5.0.0) running on localhost, and I can open, edit, and save XQuery scripts from inside eXist-db within <oXygen/>, from which I conclude that the connection is live. Since <oXygen/> apparently cannot use the eXist-db data source connection for debugging, instead of using the <oXygen/> XQuery debugger perspective to run the script I configured a transformation scenario where I specify the localhost eXist-db connection as the Transformer. When I run this script, I get the following error message from <oXygen/>: err:XPDY0002 Variable $request is not bound to an Java object The function is used in a line that reads: declare variable $story_id as xs:string := request:get-parameter('story', 'x'); I thought at first that the error might be because the "request:" namespace prefix was not declared and bound (eXist-db declares it implicitly), so I added an explicit namespace declaration for it: declare namespace request="http://exist-db.org/xquery/request"; The error remains. The entire XQuery script is below; it retrieves information from a TEI document, based on a user-supplied resource name, if the document exists and returns an error message otherwise. Can someone please help me identify what I have apparently misunderstood about running XQuery scripts in an <oXygen/> transformation scenario using eXist-db as the XQuery transformer? Sincerely, David djbpitt@gmail.com __ xquery version "3.1"; declare default element namespace "http://www.tei-c.org/ns/1.0"; declare namespace request="http://exist-db.org/xquery/request"; declare variable $stories as document-node()+ := collection('/db/apps/neh_06_reading_tei/xml'); declare variable $story_id as xs:string := request:get-parameter('story', 'x'); declare variable $story_filename as xs:string: = concat($story_id, '.xml'); declare variable $story as document-node()? := $stories[ends-with(base-uri(), $story_filename)]; if ($story) then <TEI>{ $story//(titleStmt/title | text) }</TEI> else <error xmlns="">{concat('No such story:', $story_id)}</error>
Hi David, Let me quote from Adam Retter's response to a similar question on exist-open[^1]:
The issue you have is that the Request object only makes sense when your XQuery is run by eXist-db's webserver, this is because the "request" is the incoming HTTP request. When running via oxygen there is no HTTP request.
The same factor affects other utilities that talk to eXist via XML-RPC, such as the Java Admin Client. makes sense, because the oXygen data source connection that is responsible for executing eXist queries uses the XML-RPC protocol. See the attached screenshot. In the same thread, Roy Walter suggested a workaround: using the 3-parameter variant of the request:get-parameter function, in which the 3rd parameter instructs the function whether to fail on error or not.[^2] If you change your use of the function to: ``` request:get-parameter('story', 'x', false()); ``` ... then the function will return "x" when it otherwise would raise an error. Best, Joe [^1]: https://markmail.org/message/afds3uvbbouees7a [^2]: https://markmail.org/message/offwjsqd46fcofqc On Sun, Dec 29, 2019 at 10:58 AM David Birnbaum <djbpitt@gmail.com> wrote:
Dear oxygen-user list,
I've constructed an XQuery script for eXist-db that uses the function request:get-parameter(). It works as expected in eXide. I have established a data source connection between <oXygen/> (XML Editor 21.1, build 2019120214, running on MacOS Mojave) and eXist-db (5.0.0) running on localhost, and I can open, edit, and save XQuery scripts from inside eXist-db within <oXygen/>, from which I conclude that the connection is live. Since <oXygen/> apparently cannot use the eXist-db data source connection for debugging, instead of using the <oXygen/> XQuery debugger perspective to run the script I configured a transformation scenario where I specify the localhost eXist-db connection as the Transformer. When I run this script, I get the following error message from <oXygen/>:
err:XPDY0002 Variable $request is not bound to an Java object
The function is used in a line that reads:
declare variable $story_id as xs:string := request:get-parameter('story', 'x');
I thought at first that the error might be because the "request:" namespace prefix was not declared and bound (eXist-db declares it implicitly), so I added an explicit namespace declaration for it:
declare namespace request="http://exist-db.org/xquery/request";
The error remains. The entire XQuery script is below; it retrieves information from a TEI document, based on a user-supplied resource name, if the document exists and returns an error message otherwise.
Can someone please help me identify what I have apparently misunderstood about running XQuery scripts in an <oXygen/> transformation scenario using eXist-db as the XQuery transformer?
Sincerely,
David djbpitt@gmail.com __
xquery version "3.1"; declare default element namespace "http://www.tei-c.org/ns/1.0"; declare namespace request="http://exist-db.org/xquery/request"; declare variable $stories as document-node()+ := collection('/db/apps/neh_06_reading_tei/xml'); declare variable $story_id as xs:string := request:get-parameter('story', 'x'); declare variable $story_filename as xs:string: = concat($story_id, '.xml'); declare variable $story as document-node()? := $stories[ends-with(base-uri(), $story_filename)];
if ($story) then <TEI>{ $story//(titleStmt/title | text) }</TEI> else <error xmlns="">{concat('No such story:', $story_id)}</error>
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Apologies, I hit send before deleting an incomplete thought in the 3rd paragraph. Revised version is below. On Sun, Dec 29, 2019 at 5:35 PM Joe Wicentowski <joewiz@gmail.com> wrote:
Hi David,
Let me quote from Adam Retter's response to a similar question on exist-open[^1]:
The issue you have is that the Request object only makes sense when your XQuery is run by eXist-db's webserver, this is because the "request" is the incoming HTTP request. When running via oxygen there is no HTTP request.
The same factor affects other utilities that talk to eXist via XML-RPC, such as eXist's Java Admin Client. See the attached screenshot.
In the same thread, Roy Walter suggested a workaround: using the 3-parameter variant of the request:get-parameter function, in which the 3rd parameter instructs the function whether to fail on error or not.[^2] If you change your use of the function to:
``` request:get-parameter('story', 'x', false()); ```
... then the function will return "x" when it otherwise would raise an error.
Best, Joe
[^1]: https://markmail.org/message/afds3uvbbouees7a [^2]: https://markmail.org/message/offwjsqd46fcofqc
On Sun, Dec 29, 2019 at 10:58 AM David Birnbaum <djbpitt@gmail.com> wrote:
Dear oxygen-user list,
I've constructed an XQuery script for eXist-db that uses the function request:get-parameter(). It works as expected in eXide. I have established a data source connection between <oXygen/> (XML Editor 21.1, build 2019120214, running on MacOS Mojave) and eXist-db (5.0.0) running on localhost, and I can open, edit, and save XQuery scripts from inside eXist-db within <oXygen/>, from which I conclude that the connection is live. Since <oXygen/> apparently cannot use the eXist-db data source connection for debugging, instead of using the <oXygen/> XQuery debugger perspective to run the script I configured a transformation scenario where I specify the localhost eXist-db connection as the Transformer. When I run this script, I get the following error message from <oXygen/>:
err:XPDY0002 Variable $request is not bound to an Java object
The function is used in a line that reads:
declare variable $story_id as xs:string := request:get-parameter('story', 'x');
I thought at first that the error might be because the "request:" namespace prefix was not declared and bound (eXist-db declares it implicitly), so I added an explicit namespace declaration for it:
declare namespace request="http://exist-db.org/xquery/request";
The error remains. The entire XQuery script is below; it retrieves information from a TEI document, based on a user-supplied resource name, if the document exists and returns an error message otherwise.
Can someone please help me identify what I have apparently misunderstood about running XQuery scripts in an <oXygen/> transformation scenario using eXist-db as the XQuery transformer?
Sincerely,
David djbpitt@gmail.com __
xquery version "3.1"; declare default element namespace "http://www.tei-c.org/ns/1.0"; declare namespace request="http://exist-db.org/xquery/request"; declare variable $stories as document-node()+ := collection('/db/apps/neh_06_reading_tei/xml'); declare variable $story_id as xs:string := request:get-parameter('story', 'x'); declare variable $story_filename as xs:string: = concat($story_id, '.xml'); declare variable $story as document-node()? := $stories[ends-with(base-uri(), $story_filename)];
if ($story) then <TEI>{ $story//(titleStmt/title | text) }</TEI> else <error xmlns="">{concat('No such story:', $story_id)}</error>
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participants (2)
-
David Birnbaum -
Joe Wicentowski