org.mozilla.javascript.Context.setOptimizationLevel()方法的使用及代码示例

x33g5p2x  于2022-01-18 转载在 JavaScript  
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本文整理了Java中org.mozilla.javascript.Context.setOptimizationLevel()方法的一些代码示例，展示了Context.setOptimizationLevel()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Context.setOptimizationLevel()方法的具体详情如下：
包路径：org.mozilla.javascript.Context
类名称：Context
方法名：setOptimizationLevel

Context.setOptimizationLevel介绍

[英]Set the current optimization level.

The optimization level is expected to be an integer between -1 and 9. Any negative values will be interpreted as -1, and any values greater than 9 will be interpreted as 9. An optimization level of -1 indicates that interpretive mode will always be used. Levels 0 through 9 indicate that class files may be generated. Higher optimization levels trade off compile time performance for runtime performance. The optimizer level can't be set greater than -1 if the optimizer package doesn't exist at run time.
[中]设置当前优化级别。
优化级别应为-1到9之间的整数。任何负值将被解释为-1，任何大于9的值将被解释为9。优化级别为-1表示将始终使用解释模式。级别0到9表示可以生成类文件。更高的优化级别以编译时性能换取运行时性能。如果优化器包在运行时不存在，则优化器级别不能设置为大于-1。

代码示例

代码示例来源：origin: apache/incubator-druid

public JavaScriptPredicateFactory(final String script, final ExtractionFn extractionFn)
{
 Preconditions.checkNotNull(script, "script must not be null");
 this.script = script;
 this.extractionFn = extractionFn;
 final Context cx = Context.enter();
 try {
  cx.setOptimizationLevel(9);
  scope = cx.initStandardObjects();
  fnApply = cx.compileFunction(scope, script, "script", 1, null);
 }
 finally {
  Context.exit();
 }
}

代码示例来源：origin: facebook/stetho

/**
  * Setups a proper javascript context so that it can run javascript code properly under android.
  * For android we need to disable bytecode generation since the android vms don't understand JVM bytecode.
  * @return a proper javascript context
  */
 static @NonNull Context enterJsContext() {
  final Context jsContext = Context.enter();

  // If we cause the context to throw a runtime exception from this point
  // we need to make sure that exit the context.
  try {
   jsContext.setLanguageVersion(Context.VERSION_1_8);

   // We can't let Rhino to optimize the JS and to use a JIT because it would generate JVM bytecode
   // and android runs on DEX bytecode. Instead we need to go in interpreted mode.
   jsContext.setOptimizationLevel(-1);
  } catch (RuntimeException e) {
   // Something bad happened to the javascript context but it might still be usable.
   // The first thing to do is to exit the context and then propagate the error.
   Context.exit();
   throw e;
  }

  return jsContext;
 }
}

代码示例来源：origin: apache/incubator-druid

private static Function compile(String function)
{
 final ContextFactory contextFactory = ContextFactory.getGlobal();
 final Context context = contextFactory.enterContext();
 context.setOptimizationLevel(JavaScriptConfig.DEFAULT_OPTIMIZATION_LEVEL);
 final ScriptableObject scope = context.initStandardObjects();
 final org.mozilla.javascript.Function fn = context.compileFunction(scope, function, "fn", 1, null);
 Context.exit();
 return new Function()
 {
  @Override
  public double apply(Object[] args)
  {
   // ideally we need a close() function to discard the context once it is not used anymore
   Context cx = Context.getCurrentContext();
   if (cx == null) {
    cx = contextFactory.enterContext();
   }
   return Context.toNumber(fn.call(cx, scope, scope, args));
  }
 };
}

代码示例来源：origin: apache/incubator-druid

private static Function<Object, Object> compile(String function)
{
 final ContextFactory contextFactory = ContextFactory.getGlobal();
 final Context context = contextFactory.enterContext();
 context.setOptimizationLevel(9);
 final ScriptableObject scope = context.initStandardObjects();
 final org.mozilla.javascript.Function fn = context.compileFunction(scope, function, "fn", 1, null);
 Context.exit();
 return new Function<Object, Object>()
 {
  @Override
  public Object apply(Object input)
  {
   // ideally we need a close() function to discard the context once it is not used anymore
   Context cx = Context.getCurrentContext();
   if (cx == null) {
    cx = contextFactory.enterContext();
   }
   final Object res = fn.call(cx, scope, scope, new Object[]{input});
   return res != null ? Context.toObject(res, scope) : null;
  }
 };
}

代码示例来源：origin: apache/incubator-druid

private static Function<Object, String> compile(String function)
{
 final ContextFactory contextFactory = ContextFactory.getGlobal();
 final Context context = contextFactory.enterContext();
 context.setOptimizationLevel(JavaScriptConfig.DEFAULT_OPTIMIZATION_LEVEL);
 final ScriptableObject scope = context.initStandardObjects();
 final org.mozilla.javascript.Function fn = context.compileFunction(scope, function, "fn", 1, null);
 Context.exit();
 return new Function<Object, String>()
 {
  @Override
  public String apply(Object input)
  {
   // ideally we need a close() function to discard the context once it is not used anymore
   Context cx = Context.getCurrentContext();
   if (cx == null) {
    cx = contextFactory.enterContext();
   }
   final Object res = fn.call(cx, scope, scope, new Object[]{input});
   return res != null ? Context.toString(res) : null;
  }
 };
}

代码示例来源：origin: apache/incubator-druid

context.setOptimizationLevel(JavaScriptConfig.DEFAULT_OPTIMIZATION_LEVEL);

代码示例来源：origin: pentaho/pentaho-kettle

jsscope = jscx.initStandardObjects( null, false );
try {
 jscx.setOptimizationLevel( Integer.valueOf( transMeta.environmentSubstitute( optimizationLevel ) ) );
} catch ( NumberFormatException nfe ) {
 error_message =

代码示例来源：origin: pentaho/pentaho-kettle

jscx.setOptimizationLevel( -1 );
jsscope = jscx.initStandardObjects( null, false );

代码示例来源：origin: pentaho/pentaho-kettle

jscx.setOptimizationLevel( -1 );
jsscope = jscx.initStandardObjects( null, false );

代码示例来源：origin: pentaho/pentaho-kettle

String optimizationLevelAsString = environmentSubstitute( meta.getOptimizationLevel() );
if ( !Utils.isEmpty( Const.trim( optimizationLevelAsString ) ) ) {
 data.cx.setOptimizationLevel( Integer.parseInt( optimizationLevelAsString.trim() ) );
 logBasic( BaseMessages.getString( PKG, "ScriptValuesMod.Optimization.Level", environmentSubstitute( meta
  .getOptimizationLevel() ) ) );
} else {
 data.cx.setOptimizationLevel( Integer.parseInt( ScriptValuesMetaMod.OPTIMIZATION_LEVEL_DEFAULT ) );
 logBasic( BaseMessages.getString(
  PKG, "ScriptValuesMod.Optimization.UsingDefault", ScriptValuesMetaMod.OPTIMIZATION_LEVEL_DEFAULT ) );

代码示例来源：origin: rnewson/couchdb-lucene

context.setOptimizationLevel(9);

代码示例来源：origin: com.google.code.scriptengines/scriptengines-javascript

protected Context makeContext() {
    Context cx = super.makeContext();
    cx.setOptimizationLevel(-1);
    return cx;
  }
});

代码示例来源：origin: com.atlassian.pluginkit/ringojs-kit

private Context createContext() {
  Context context = Context.enter();
  context.setOptimizationLevel(-1); // Without this, Rhino hits a 64K bytecode limit and fails
  return context;
}

代码示例来源：origin: cat.inspiracio/rhino-js-engine

protected Context makeContext() {
    Context cx = super.makeContext();
    cx.setOptimizationLevel(-1);
    return cx;
  }
});

代码示例来源：origin: org.verapdf/core

public static synchronized ScriptableObject initialise() {
  context = Context.enter();
  context.setOptimizationLevel(OPTIMIZATION_LEVEL);
  return context.initStandardObjects();
}

代码示例来源：origin: apache/cxf

private Object[] compileScript(Context cx, String scriptStr, Scriptable scriptScope, File f) {
  int opt = cx.getOptimizationLevel();
  cx.setOptimizationLevel(-1);
  Script script = cx.compileString(scriptStr, f.getName(), 1, null);
  script.exec(cx, scriptScope);
  Object[] ids = scriptScope.getIds();
  cx.setOptimizationLevel(opt);
  script = cx.compileString(scriptStr, f.getName(), 1, null);
  script.exec(cx, scriptScope);
  return ids;
}

代码示例来源：origin: org.apache.cxf/cxf-rt-frontend-js

private Object[] compileScript(Context cx, String scriptStr, Scriptable scriptScope, File f) {
  int opt = cx.getOptimizationLevel();
  cx.setOptimizationLevel(-1);
  Script script = cx.compileString(scriptStr, f.getName(), 1, null);
  script.exec(cx, scriptScope);
  Object[] ids = scriptScope.getIds();
  cx.setOptimizationLevel(opt);
  script = cx.compileString(scriptStr, f.getName(), 1, null);
  script.exec(cx, scriptScope);
  return ids;
}

代码示例来源：origin: net.sourceforge.purrpackage/purrpackage

synchronized void init() {
  if ( ! inited ) {
    Context c = Context.enter();
    c.setOptimizationLevel( -1 );
    Global g = Main.getGlobal();
    g.init( c );
    inited = true;
  }
}

代码示例来源：origin: com.github.tntim96/rhino

/**
 * Called when a Context is created.
 */
public void contextCreated(Context cx) {
  if (type != IPROXY_LISTEN) Kit.codeBug();
  ContextData contextData = new ContextData();
  Debugger debugger = new DimIProxy(dim, IPROXY_DEBUG);
  cx.setDebugger(debugger, contextData);
  cx.setGeneratingDebug(true);
  cx.setOptimizationLevel(-1);
}

代码示例来源：origin: io.apisense/rhino-android

/**
 * Create new Context instance to be associated with the current thread.
 */
@Override
protected Context makeContext() {
  Context cx = super.makeContext();
  cx.setLanguageVersion(languageVersion);
  cx.setOptimizationLevel(optimizationLevel);
  cx.setClassShutter(RhinoClassShutter.getInstance());
  cx.setWrapFactory(RhinoWrapFactory.getInstance());
  return cx;
}

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