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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

exception, exception, jo, metaclass, metaclass, object, object, softreference, softreference, string

The Groovy source code

 * Copyright 2003-2011 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 org.codehaus.groovy.classgen;

import groovy.lang.MetaClass;
import org.codehaus.groovy.runtime.InvokerHelper;
import org.objectweb.asm.util.ASMifierClassVisitor;

import java.lang.ref.SoftReference;

public class JO {
    public static SoftReference staticMetaClass;

    MetaClass getStaticMetaClass (Object obj) {
        MetaClass mc;
        if (staticMetaClass == null || (mc = (MetaClass) staticMetaClass.get()) == null ) {
            mc = InvokerHelper.getMetaClass(obj);
            staticMetaClass = new SoftReference(mc);
        return mc;

    public static void main(String[] args) throws Exception {
        ASMifierClassVisitor.main(new String[]{"target/classes/groovy/swing/SwingBuilder.class"});
//        ASMifierClassVisitor.main(new String[]{"target/classes/org/codehaus/groovy/tools/shell/util/HelpFormatter.class"});
//        ASMifierClassVisitor.main(new String[]{"target/classes/org/codehaus/groovy/runtime/callsite/PogoMetaMethodSite.class"});
//        ASMifierClassVisitor.main(new String[]{"target/test-classes/spectralnorm.class"});
//        ASMifierClassVisitor.main(new String[]{"target/test-classes/groovy/bugs/CustomMetaClassTest.class"});

Other Groovy examples (source code examples)

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