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Groovy example source code file (

This example Groovy source code file ( is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

groovysystem, groovysystem, meta_class_registry, meta_class_registry, metaclass, metaclassregistry, metaclassregistry, metaclassregistryimpl, string, use_reflection, use_reflection

The Groovy source code

 * Copyright 2003-2007 the original author or authors.
 * Licensed 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
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package groovy.lang;

import org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl;
import org.codehaus.groovy.util.ReferenceBundle;
import org.codehaus.groovy.util.ReleaseInfo;

public final class GroovySystem {
    //  TODO: make this initialization able to set useReflection true
    //  TODO: have some way of specifying another MetaClass Registry implementation
    static {
        USE_REFLECTION = true;
        META_CLASS_REGISTRY = new MetaClassRegistryImpl();
     * The MetaClass for java.lang.Object
    private static MetaClass objectMetaClass;
     * If true then the MetaClass will only use reflection for method dispatch, property access, etc.
    private static final boolean USE_REFLECTION;
     * Reference to the MetaClass Registry to be used by the Groovy run time system to map classes to MetaClasses
    private static final MetaClassRegistry META_CLASS_REGISTRY;

    private static boolean keepJavaMetaClasses=false;
    private GroovySystem() {
        // Do not allow this class to be instantiated

    public static boolean isUseReflection() {
        return USE_REFLECTION;

    public static MetaClassRegistry getMetaClassRegistry() {
        return META_CLASS_REGISTRY;
    public static void setKeepJavaMetaClasses(boolean keepJavaMetaClasses) {
        GroovySystem.keepJavaMetaClasses = keepJavaMetaClasses;
    public static boolean isKeepJavaMetaClasses() {
        return keepJavaMetaClasses;
     * This method can be used to ensure that no threaded created
     * by a reference manager will be active. This is useful if the Groovy
     * runtime itself is loaded through a class loader which should be disposed
     * off. Without calling this method and if a threaded reference manager is
     * active the class loader cannot be unloaded!
     * Per default no threaded manager will be used.
     * @since 1.6
    public static void stopThreadedReferenceManager() {

     * Returns the groovy version
    public static String getVersion() {
        return ReleaseInfo.getVersion();

Other Groovy examples (source code examples)

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