Package org.jbpm.process.core.transformation

Class JavaScriptingDataTransformer

  • All Implemented Interfaces:
    org.kie.api.runtime.process.DataTransformer
    public class JavaScriptingDataTransformer
extends Object
implements org.kie.api.runtime.process.DataTransformer
    Implementation of DataTransformer that is based on standard Java scripting capabilities (javax.script). By default it uses Rhino scripting engine for JavaScript evaluation. But supports all scripting engine that are compliant with JSR 223. It's just a matter of placing them on classpath so Java itself can discover it and then new instance of this class will be registered for that engine.
    Allows to pass custom properties to the engine via property file that should be placed on root of the classpath named 'FQCN of the script engine factory'.properties
    When reading the properties file transformer recognizes three types of data:
    • boolean - when value is either true or false string
    • integer - when value is a number (matches \d+ regex)
    • string - default type
    return value of the expression is either:
    • value returned from scriptEngine.eval if not null
    • result of the output produced by the script engine - will be used only when eval returns null

    • Constructor Detail

      • JavaScriptingDataTransformer

        public JavaScriptingDataTransformer​(ScriptEngineFactory factory)

    • Method Detail

      • transform

        public Object transform​(Object expression,
                        Map<String,​Object> parameters)
        Specified by:
        transform in interface org.kie.api.runtime.process.DataTransformer

      • compile

        public Object compile​(String expression,
                      Map<String,​Object> parameters)
        Specified by:
        compile in interface org.kie.api.runtime.process.DataTransformer

      • registerAttributes

        protected void registerAttributes()