XQJ is a standard for calling XQuery from Java. XQJ is to XML data sources what JDBC is to relational data sources. It provides a standard set of classes for connecting to a data source, executing a query, and traversing through the result set. It is being developed using the Java Community Process as JSR 225 and is currently in the Early Draft Review 2 stage.
Example 22-4 shows an example of Java code that connects to an XML data source and iterates through the results.
Example 22-4. XQJ example
// connect to the data source XQConnection conn = xqds.getConnection( ); // create a new expression object XQExpression expr = conn.createExpression( ); // execute the query XQResultSequence result = expr.executeQuery( "for $prod in doc('catalog.xml')//product" + "order by $prod/number" + "return $prod/name"); // iterate through the result sequence while (result.next( )) { // retrieve the atomic value of the current item String prodName = result.getAtomicValue( ); System.out.println("Product name: " + prodName); }
For more information on XQJ, see the specification at http://jcp.org/en/jsr/detail?id=225.
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