Difference between revisions of "Java Bindings"
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Note: To call the <code>write</code> method of the filewriter class you have to pass a | Note: To call the <code>write</code> method of the filewriter class you have to pass a | ||
instantiated filewriter-object as first parameter to the method. | instantiated filewriter-object as first parameter to the method. | ||
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[[Category:XQuery]] | [[Category:XQuery]] | ||
Revision as of 11:58, 4 January 2011
The Java Binding feature is an extensibility mechanism which allows direct calling
of Java methods bound as XQuery functions and manipulation of wrapped Java objects.
The following examples introduce the behavior. Please note that the namespace URI
must be of the form java:fullyQualifiedClassName.
This example uses the java Math class and returns the cosine of an angle:
declare namespace math = "java:java.lang.Math"; math:cos(xs:double(0))
Note: To call a method directly it has to be set as static in you java code.
The next example writes 256 bytes to the file output.txt:
declare namespace fw = "java:java.io.FileWriter";
let $file := fw:new('output.txt')
return (
for $i in 0 to 255
return fw:write($file, xs:int($i)),
fw:close($file)
)
Note: To call the write method of the filewriter class you have to pass a
instantiated filewriter-object as first parameter to the method.
