diff -r 4ebc2e2fb97c -r 71c04702a3d5 src/java.scripting/share/classes/javax/script/CompiledScript.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/java.scripting/share/classes/javax/script/CompiledScript.java Tue Sep 12 19:03:39 2017 +0200 @@ -0,0 +1,117 @@ +/* + * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package javax.script; + +import java.util.Map; + +/** + * 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 the CompiledScript may visible during subsequent executions of scripts by the engine. + * + * @author Mike Grogan + * @since 1.6 + */ +public abstract class CompiledScript { + + /** + * Executes the program stored in this CompiledScript object. + * + * @param context A ScriptContext that is used in the same way as + * the ScriptContext passed to the eval methods of + * ScriptEngine. + * + * @return 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. + * @throws NullPointerException if context is null. + */ + + public abstract Object eval(ScriptContext context) 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. + * + * @param bindings The bindings of attributes used for the ENGINE_SCOPE. + * + * @return The return value from the script execution + * + * @throws ScriptException if an error occurs. + */ + public Object eval(Bindings bindings) throws ScriptException { + + ScriptContext ctxt = getEngine().getContext(); + + if (bindings != null) { + SimpleScriptContext tempctxt = new SimpleScriptContext(); + tempctxt.setBindings(bindings, ScriptContext.ENGINE_SCOPE); + tempctxt.setBindings(ctxt.getBindings(ScriptContext.GLOBAL_SCOPE), + ScriptContext.GLOBAL_SCOPE); + tempctxt.setWriter(ctxt.getWriter()); + tempctxt.setReader(ctxt.getReader()); + tempctxt.setErrorWriter(ctxt.getErrorWriter()); + ctxt = tempctxt; + } + + return eval(ctxt); + } + + + /** + * 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()). + * + * @return The return value from the script execution + * + * @throws ScriptException if an error occurs. + */ + public Object eval() throws ScriptException { + return eval(getEngine().getContext()); + } + + /** + * Returns the ScriptEngine whose compile method created this CompiledScript. + * The CompiledScript will execute in this engine. + * + * @return The ScriptEngine that created this CompiledScript + */ + public abstract ScriptEngine getEngine(); + +}