org.kitesdk.morphline.scriptengine.java

Class ScriptEvaluator<T>

java.lang.Object

org.kitesdk.morphline.scriptengine.java.ScriptEvaluator<T>

public class ScriptEvaluator<T>
extends Object

Creates and compiles the given Java code block, wrapped into a Java method with the given return type and parameter types, along with a Java class definition that contains the given import statements.

Compilation is done in main memory, i.e. without writing to the filesystem.

The result is an object that can be executed (and reused) any number of times. This is a high performance implementation, using an optimized variant of https://scripting.dev.java.net/" (JSR 223 Java Scripting). Calling evaluate(Object...) just means calling Method.invoke(Object, Object...) and as such has the same minimal runtime cost, i.e. O(100M calls/sec/core). Instances of this class are thread-safe if the user provided script statements are thread-safe.

Constructor Summary

Constructors

Constructor and Description
ScriptEvaluator(String javaImports, String javaCodeBlock, Class<T> returnType, String[] parameterNames, Class[] parameterTypes, Class[] throwTypes, String parseLocation)
ScriptEvaluator(String javaImports, String javaCodeBlock, Class<T> returnType, String[] parameterNames, Class[] parameterTypes, String parseLocation)

Method Summary

Methods

Modifier and Type	Method and Description
T	evaluate(Object... params)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ScriptEvaluator

public ScriptEvaluator(String javaImports,
               String javaCodeBlock,
               Class<T> returnType,
               String[] parameterNames,
               Class[] parameterTypes,
               String parseLocation)
                throws ScriptException

Throws:

ScriptException

ScriptEvaluator

public ScriptEvaluator(String javaImports,
               String javaCodeBlock,
               Class<T> returnType,
               String[] parameterNames,
               Class[] parameterTypes,
               Class[] throwTypes,
               String parseLocation)
                throws ScriptException

Throws:

ScriptException

Method Detail

evaluate

public T evaluate(Object... params)
           throws ScriptException

Throws:

ScriptException