当前页面: 在线文档首页 > JDK 5 Documentation v6.0, Java 2 SDK 英文文档

CompiledScript (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

---

Overview  Package   Class  Use  Tree  Deprecated  Index  Help		Java™ Platform Standard Ed. 6
PREV CLASS   NEXT CLASS	FRAMES    NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---

javax.script
Class CompiledScript

java.lang.Object
  javax.script.CompiledScript

---

public abstract class CompiledScript
extends Object

Extended by classes that store results of compilations. State might be stored in the form of Java classes, Java class files or scripting language opcodes. The script may be executed repeatedly without reparsing.

Each CompiledScript is associated with a ScriptEngine -- A call to an eval method of the CompiledScript causes the execution of the script by the ScriptEngine. Changes in the state of the ScriptEngine caused by execution of tne CompiledScript may visible during subsequent executions of scripts by the engine.

Since:

1.6

---

Constructor Summary
CompiledScript()

 

Method Summary
Object	eval()           Executes the program stored in the CompiledScript object.
Object	eval(Bindings bindings)           Executes the program stored in the CompiledScript object using the supplied Bindings of attributes as the ENGINE_SCOPE of the associated ScriptEngine during script execution.
abstract  Object	eval(ScriptContext context)           Executes the program stored in this CompiledScript object.
abstract  ScriptEngine	getEngine()           Returns the ScriptEngine wbose compile method created this CompiledScript.

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

CompiledScript

public CompiledScript()

Method Detail

eval

public abstract Object eval(ScriptContext context)
                     throws ScriptException

Executes the program stored in this CompiledScript object.

Parameters:

context - A ScriptContext that is used in the same way as the ScriptContext passed to the eval methods of ScriptEngine.

Returns:

The value returned by the script execution, if any. Should return null if no value is returned by the script execution.

Throws:

ScriptException - if an error occurs.

NullPointerException - if context is null.

---

eval

public Object eval(Bindings bindings)
            throws ScriptException

Executes the program stored in the CompiledScript object using the supplied Bindings of attributes as the ENGINE_SCOPE of the associated ScriptEngine during script execution. If bindings is null, then the effect of calling this method is same as that of eval(getEngine().getContext()).

. The GLOBAL_SCOPE Bindings, Reader and Writer associated with the default ScriptContext of the associated ScriptEngine are used.

Parameters:

bindings - The bindings of attributes used for the ENGINE_SCOPE.

Returns:

The return value from the script execution

Throws:

ScriptException - if an error occurs.

---

eval

public Object eval()
            throws ScriptException

Executes the program stored in the CompiledScript object. The default ScriptContext of the associated ScriptEngine is used. The effect of calling this method is same as that of eval(getEngine().getContext()).

Returns:

The return value from the script execution

Throws:

ScriptException - if an error occurs.

---

getEngine

public abstract ScriptEngine getEngine()

Returns the ScriptEngine wbose compile method created this CompiledScript. The CompiledScript will execute in this engine.

Returns:

The ScriptEngine that created this CompiledScript

---

Overview  Package   Class  Use  Tree  Deprecated  Index  Help		Java™ Platform Standard Ed. 6
PREV CLASS   NEXT CLASS	FRAMES    NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---

Submit a bug or feature
For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2006 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.