Groovy example source code file (JO.java)

This example Groovy source code file (JO.java) is included in the DevDaily.com "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 JO.java 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
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * 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"});
    }
}