| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package javax.script; |
| |
| /** |
| * Base for classes that store the results of compilations. |
| * |
| * This class is immutable. |
| * |
| * See Javadoc of <a href="http://java.sun.com/javase/6/docs/api/javax/script/package-summary.html">Java Scripting API</a> |
| */ |
| public abstract class CompiledScript { |
| |
| public CompiledScript(){ |
| } |
| |
| /** |
| * 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 resultant object after the evaluation of the |
| * script (may be <tt>null</tt>) |
| * @throws ScriptException if evaluation fails for any reason |
| */ |
| public Object eval() throws ScriptException { |
| return eval(getEngine().getContext()); |
| } |
| |
| /** |
| * 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 <tt>null</tt>, then the effect of calling this method is |
| * same as that of eval(getEngine().getContext()). |
| * <br/> |
| * The GLOBAL_SCOPE Bindings, Reader and Writer associated |
| * with the default ScriptContext of the associated ScriptEngine |
| * are used. |
| * |
| * @param bindings the bindings to be used as the ENGINE_SCOPE |
| * @return resultant object after the re-evaluation (may be <tt>null</tt>) |
| * @throws ScriptException if the evaluation fails for any reason |
| */ |
| public Object eval(Bindings bindings) throws ScriptException{ |
| ScriptContext context; |
| if (bindings == null) { |
| context = getEngine().getContext(); |
| } else { |
| // same code as ((AbstractScriptEngine) getEngine()).getScriptContext(bindings); |
| context = new SimpleScriptContext(); |
| context.setBindings(bindings, ScriptContext.ENGINE_SCOPE); |
| ScriptContext oldContext = getEngine().getContext(); |
| context.setBindings(oldContext.getBindings(ScriptContext.GLOBAL_SCOPE), ScriptContext.GLOBAL_SCOPE); |
| context.setReader(oldContext.getReader()); |
| context.setWriter(oldContext.getWriter()); |
| context.setErrorWriter(oldContext.getErrorWriter()); |
| } |
| return eval(context); |
| } |
| |
| /** |
| * Evaluates the compiled script using the specified |
| * {@link ScriptContext}. |
| * |
| * @param context A ScriptContext to be used in the evalution |
| * of the script |
| * @return resultant object after the evaluation (may be <tt>null</tt>) |
| * @throws ScriptException if the evaluation fails for any reason |
| * @throws NullPointerException if context is <tt>null</tt> |
| */ |
| public abstract Object eval(ScriptContext context) throws ScriptException; |
| |
| /** |
| * Retrieves a reference to the ScriptEngine whose methods |
| * created this CompiledScript object. |
| * |
| * @return the ScriptEngine which created this CompiledScript |
| * object |
| */ |
| public abstract ScriptEngine getEngine(); |
| |
| } |