ScriptEnginePool.java 文件源码

/**
 * Clears the script engine of all previous state except, if it is a BeanShell interpreter,
 * the engine is left
 *
 * @param scriptEngine ScriptEngine to clear
 */
private void clearEngine(String language, ScriptEngine scriptEngine) {
    // Clear everything except the BeanShell engine ("bsh" in the binding)
    // This will clear all imported class, methods, and variables
    List<String> itemsToRemove = new ArrayList<String>();
    for (Map.Entry<String, Object> bindingEntry : scriptEngine.getBindings(ScriptContext.ENGINE_SCOPE).entrySet()) {
        if (language.equalsIgnoreCase(BEANSHELL) && bindingEntry.getKey().equalsIgnoreCase(BEANSHELL_ENGINE_NAME)) {
            continue;
        }
        itemsToRemove.add(bindingEntry.getKey());
    }
    for (String value : itemsToRemove) {
        scriptEngine.getBindings(ScriptContext.ENGINE_SCOPE).remove(value);
    }

    // Clear entire global scope
    scriptEngine.getBindings(ScriptContext.GLOBAL_SCOPE).clear();
}