| /* |
| * 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. |
| * <br><br> |
| * Each <code>CompiledScript</code> is associated with a <code>ScriptEngine</code> -- A call to an <code>eval</code> |
| * method of the <code>CompiledScript</code> causes the execution of the script by the |
| * <code>ScriptEngine</code>. Changes in the state of the <code>ScriptEngine</code> caused by execution |
| * of the <code>CompiledScript</code> 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 <code>CompiledScript</code> object. |
| * |
| * @param context A <code>ScriptContext</code> that is used in the same way as |
| * the <code>ScriptContext</code> passed to the <code>eval</code> methods of |
| * <code>ScriptEngine</code>. |
| * |
| * @return The value returned by the script execution, if any. Should return <code>null</code> |
| * 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 <code>CompiledScript</code> object using |
| * the supplied <code>Bindings</code> of attributes as the <code>ENGINE_SCOPE</code> of the |
| * associated <code>ScriptEngine</code> during script execution. If bindings is null, |
| * then the effect of calling this method is same as that of eval(getEngine().getContext()). |
| * <p>. |
| * The <code>GLOBAL_SCOPE</code> <code>Bindings</code>, <code>Reader</code> and <code>Writer</code> |
| * associated with the default <code>ScriptContext</code> of the associated <code>ScriptEngine</code> are used. |
| * |
| * @param bindings The bindings of attributes used for the <code>ENGINE_SCOPE</code>. |
| * |
| * @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 <code>CompiledScript</code> object. The |
| * default <code>ScriptContext</code> of the associated <code>ScriptEngine</code> 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 <code>ScriptEngine</code> whose <code>compile</code> method created this <code>CompiledScript</code>. |
| * The <code>CompiledScript</code> will execute in this engine. |
| * |
| * @return The <code>ScriptEngine</code> that created this <code>CompiledScript</code> |
| */ |
| public abstract ScriptEngine getEngine(); |
| |
| } |