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Groovy example source code file (MetaClassConstructorSite.java)

This example Groovy source code file (MetaClassConstructorSite.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

classinfo, classinfo, groovyruntimeexception, metaclass, metaclassconstructorsite, metaclassconstructorsite, metaclasssite, metaclasssite, object, object, throwable

The Groovy MetaClassConstructorSite.java 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
 *
 *     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.runtime.callsite;

import org.codehaus.groovy.reflection.ClassInfo;
import org.codehaus.groovy.runtime.ScriptBytecodeAdapter;

import groovy.lang.GroovyRuntimeException;
import groovy.lang.MetaClass;

/**
 * Call site for constructor
 *   meta class - cached
 *   method - not cached
 *
 * @author Alex Tkachman
*/
public class MetaClassConstructorSite extends MetaClassSite {

    private final ClassInfo classInfo;
    private final int version;

    public MetaClassConstructorSite(CallSite site, MetaClass metaClass) {
        super(site, metaClass);
        classInfo = ClassInfo.getClassInfo(metaClass.getTheClass());
        version = classInfo.getVersion();
    }

    public Object callConstructor(Object receiver, Object[] args) throws Throwable {
        try {
            if (receiver == metaClass.getTheClass()
                && version == classInfo.getVersion()) // metaClass still be valid
                return metaClass.invokeConstructor(args);
            else
              return CallSiteArray.defaultCallConstructor(this, receiver, args);
        } catch (GroovyRuntimeException gre) {
            throw ScriptBytecodeAdapter.unwrap(gre);
        }
    }
}

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