XQuery API for Java

XQuery API for Java (XQJ) refers to the common Java API for the W3C XQuery 1.0 specification. It was submitted under the Java Community Process as JSR 225 ^[1], and final release was made available on June 24, 2009.

The XQJ API enables a Java developer to:

Create and prepare XQuery expressions which are statically analysed at runtime.
Modify dynamic and static contexts, e.g. binding external variables from Java and declaring default XML namespaces.^[2]
Submit queries to XQuery processors and process the results in Java.

The XQJ API goes a long way in giving Java developers an interface to the XDM Model.^[3]. Its design is closely related to JDBC, using client/server terminology, which lends itself well to Server based XML Databases, but is less well adapted to embedded Databases or client-side XQuery processors.

At the time of writing (Dec 2011) there appear to be no plans for XQJ to become part of the standard Java class library.

References

^ JSR 225
^ Binding Java Variables
^ XQuery 1.0 and XPath 2.0 Data Model

Links

Javadoc for XQJ