jdk8-mips64-public/nashorn: src/jdk/nashorn/api/scripting/NashornScriptEngineFactory.java@390d44ba90cf (annotated)

src/jdk/nashorn/api/scripting/NashornScriptEngineFactory.java@390d44ba90cf (annotated)

src/jdk/nashorn/api/scripting/NashornScriptEngineFactory.java

Thu, 14 Mar 2013 14:49:55 +0100

author: lagergren
date: Thu, 14 Mar 2013 14:49:55 +0100
changeset 139: 390d44ba90cf
parent 136: c54e218333be
child 196: 222a72df2f42
permissions: -rw-r--r--

8009982: Lazy execution bugfix. Added lazy sunspider unit test. Added mandreel to compile-octane test. Fixed warnings
Reviewed-by: sundar, jlaskey

 /*
  * Copyright (c) 2010, 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 jdk.nashorn.api.scripting;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import javax.script.ScriptEngine;
 import javax.script.ScriptEngineFactory;
 import jdk.nashorn.internal.runtime.Version;
 import sun.reflect.Reflection;
 /**
  * JSR-223 compliant script engine factory for Nashorn. The engine answers for:
  * <ul>
  * <li>names {@code "nashorn"}, {@code "Nashorn"}, {@code "js"}, {@code "JS"}, {@code "JavaScript"},
  * {@code "javascript"}, {@code "ECMAScript"}, and {@code "ecmascript"};</li>
  * <li>MIME types {@code "application/javascript"}, {@code "application/ecmascript"}, {@code "text/javascript"}, and
  * {@code "text/ecmascript"};</li>
  * <li>as well as for the extension {@code "js"}.</li>
  * </ul>
  * Programs executing in engines created using {@link #getScriptEngine(String[])} will have the passed arguments
  * accessible as a global variable named {@code "arguments"}.
  */
 public final class NashornScriptEngineFactory implements ScriptEngineFactory {
     @Override
     public String getEngineName() {
         return (String) getParameter(ScriptEngine.ENGINE);
     }
     @Override
     public String getEngineVersion() {
         return (String) getParameter(ScriptEngine.ENGINE_VERSION);
     }
     @Override
     public List<String> getExtensions() {
         return Collections.unmodifiableList(extensions);
     }
     @Override
     public String getLanguageName() {
         return (String) getParameter(ScriptEngine.LANGUAGE);
     }
     @Override
     public String getLanguageVersion() {
         return (String) getParameter(ScriptEngine.LANGUAGE_VERSION);
     }
     @Override
     public String getMethodCallSyntax(final String obj, final String method, final String... args) {
         final StringBuilder sb = new StringBuilder().append(obj).append('.').append(method).append('(');
         final int len = args.length;
         if (len > 0) {
             sb.append(args[0]);
         }
         for (int i = 1; i < len; i++) {
             sb.append(',').append(args[i]);
         }
         sb.append(')');
         return sb.toString();
     }
     @Override
     public List<String> getMimeTypes() {
         return Collections.unmodifiableList(mimeTypes);
     }
     @Override
     public List<String> getNames() {
         return Collections.unmodifiableList(names);
     }
     @Override
     public String getOutputStatement(final String toDisplay) {
         return "print(" + toDisplay + ")";
     }
     @Override
     public Object getParameter(final String key) {
         switch (key) {
         case ScriptEngine.NAME:
             return "javascript";
         case ScriptEngine.ENGINE:
             return "Oracle Nashorn";
         case ScriptEngine.ENGINE_VERSION:
             return Version.version();
         case ScriptEngine.LANGUAGE:
             return "ECMAScript";
         case ScriptEngine.LANGUAGE_VERSION:
             return "ECMA - 262 Edition 5.1";
         case "THREADING":
             // The engine implementation is not thread-safe. Can't be
             // used to execute scripts concurrently on multiple threads.
             return null;
         default:
             throw new IllegalArgumentException("Invalid key");
         }
     }
     @Override
     public String getProgram(final String... statements) {
         final StringBuilder sb = new StringBuilder();
         for (final String statement : statements) {
             sb.append(statement).append(';');
         }
         return sb.toString();
     }
     @Override
     public ScriptEngine getScriptEngine() {
         return new NashornScriptEngine(this, getAppClassLoader());
     }
     /**
      * Create a new Script engine initialized by given class loader.
      *
      * @param appLoader class loader to be used as script "app" class loader.
      * @return newly created script engine.
      */
     public ScriptEngine getScriptEngine(final ClassLoader appLoader) {
         checkConfigPermission();
         return new NashornScriptEngine(this, appLoader);
     }
     /**
      * Create a new Script engine initialized by given arguments.
      *
      * @param args arguments array passed to script engine.
      * @return newly created script engine.
      */
     public ScriptEngine getScriptEngine(final String[] args) {
         checkConfigPermission();
         return new NashornScriptEngine(this, args, getAppClassLoader());
     }
     /**
      * Create a new Script engine initialized by given arguments.
      *
      * @param args arguments array passed to script engine.
      * @param appLoader class loader to be used as script "app" class loader.
      * @return newly created script engine.
      */
     public ScriptEngine getScriptEngine(final String[] args, final ClassLoader appLoader) {
         checkConfigPermission();
         return new NashornScriptEngine(this, args, appLoader);
     }
     // -- Internals only below this point
     private static void checkConfigPermission() {
         final SecurityManager sm = System.getSecurityManager();
         if (sm != null) {
             sm.checkPermission(new RuntimePermission("nashorn.setConfig"));
         }
     }
     private static final List<String> names;
     private static final List<String> mimeTypes;
     private static final List<String> extensions;
     static {
         names = immutableList(
                     "nashorn", "Nashorn",
                     "js", "JS",
                     "JavaScript", "javascript",
                     "ECMAScript", "ecmascript"
                 );
         mimeTypes = immutableList(
                         "application/javascript",
                         "application/ecmascript",
                         "text/javascript",
                         "text/ecmascript"
                     );
         extensions = immutableList("js");
     }
     private static List<String> immutableList(final String... elements) {
         return Collections.unmodifiableList(Arrays.asList(elements));
     }
     private static ClassLoader getAppClassLoader() {
         if (System.getSecurityManager() == null) {
             return Thread.currentThread().getContextClassLoader();
         }
         // Try to determine the caller class loader. Use that if it can be
         // found. If not, use the class loader of nashorn itself as the
         // "application" class loader for scripts.
         // User could have called ScriptEngineFactory.getScriptEngine()
         //
         // <caller>
         //  <factory.getScriptEngine()>
         //   <factory.getAppClassLoader()>
         //    <Reflection.getCallerClass()>
         //
         // or used one of the getEngineByABC methods of ScriptEngineManager.
         //
         // <caller>
         //  <ScriptEngineManager.getEngineByName()>
         //   <factory.getScriptEngine()>
         //    <factory.getAppClassLoader()>
         //     <Reflection.getCallerClass()>
         // So, stack depth is 3 or 4 (recall it is zero based). We try
         // stack depths 3, 4 and look for non-bootstrap caller.
         Class<?> caller = null;
         for (int depth = 3; depth < 5; depth++) {
             caller = Reflection.getCallerClass(depth);
             if (caller != null && caller.getClassLoader() != null) {
                 // found a non-bootstrap caller
                 break;
             }
         }
         final ClassLoader ccl = (caller == null)? null : caller.getClassLoader();
         // if caller loader is null, then use nashorn's own loader
         return (ccl == null)? NashornScriptEngineFactory.class.getClassLoader() : ccl;
     }
 }

Mercurial > jdk8-mips64-public > nashorn / annotate

src/jdk/nashorn/api/scripting/NashornScriptEngineFactory.java@390d44ba90cf (annotated)

src/jdk/nashorn/api/scripting/NashornScriptEngineFactory.java