[jira] [Created] (OOZIE-2557) Introduce possibility to invoke Java static method

["Nazar Volynets (JIRA)" <ji...@apache.org>]

Nazar Volynets created OOZIE-2557:
-------------------------------------

             Summary: Introduce possibility to invoke Java static method
                 Key: OOZIE-2557
                 URL: https://issues.apache.org/jira/browse/OOZIE-2557
             Project: Oozie
          Issue Type: Improvement
          Components: bundle, coordinator, workflow
    Affects Versions: 4.2.0
            Reporter: Nazar Volynets


Please introduce possibility to call any Java static method in application classpath by reflection.

h5. Option 1 - New Basic Oozie/EL Function
These function should provide a possibility to specify input arguments for target  Java static method.

Example:
* function signature
{code}
Type —> String, int, boolean, double

Type callStaticMethod(String clazz, String method, [Type arg1, [Type argN])
{code}
* function usage
{code}
${ callStaticMethod('java.lang.Integer', 'valueOf', '10') }
{code}

h5. Option 2 - Introduce scriptlets like in JSP

Use special character % for it. It should be possible to mix it with Oozie/EL.

Example:
{code}
%{ java.lang.Integer.valueOf('10') }
%{ java.lang.Integer.valueOf(${someStringValue}) }
{code}

{quote}
It will bring a lot of benefits due the list of available EL functions isn't very wide.
{quote}




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