Class JavaScriptingDataTransformer
- java.lang.Object
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- org.jbpm.process.core.transformation.JavaScriptingDataTransformer
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- All Implemented Interfaces:
org.kie.api.runtime.process.DataTransformer
public class JavaScriptingDataTransformer extends Object implements org.kie.api.runtime.process.DataTransformer
Implementation ofDataTransformerthat 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
- 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
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Constructor Summary
Constructors Constructor Description JavaScriptingDataTransformer(ScriptEngineFactory factory)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Objectcompile(String expression, Map<String,Object> parameters)protected ObjectevaluateExpression(Object expression, Map<String,Object> parameters)protected voidregisterAttributes()Objecttransform(Object expression, Map<String,Object> parameters)
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Constructor Detail
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JavaScriptingDataTransformer
public JavaScriptingDataTransformer(ScriptEngineFactory factory)
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Method Detail
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transform
public Object transform(Object expression, Map<String,Object> parameters)
- Specified by:
transformin interfaceorg.kie.api.runtime.process.DataTransformer
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compile
public Object compile(String expression, Map<String,Object> parameters)
- Specified by:
compilein interfaceorg.kie.api.runtime.process.DataTransformer
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evaluateExpression
protected Object evaluateExpression(Object expression, Map<String,Object> parameters)
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registerAttributes
protected void registerAttributes()
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