Groovy example source code file (ConstructorMetaMethodSite.java)

This example Groovy source code file (ConstructorMetaMethodSite.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

class, constructormetamethodsite, constructormetamethodsite, groovyruntimeexception, groovyruntimeexception, metaclassimpl, metamethod, metamethodsite, object, object, throwable, throwable

The Groovy ConstructorMetaMethodSite.java source code

/*
 * Copyright 2003-2010 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 groovy.lang.GroovyRuntimeException;
import groovy.lang.MetaClassImpl;
import groovy.lang.MetaMethod;
import org.codehaus.groovy.runtime.MetaClassHelper;
import org.codehaus.groovy.runtime.ScriptBytecodeAdapter;

/**
 * Call site for invoking static methods
*   meta class  - cached
*   method - not cached
*
* @author Alex Tkachman
*/
public class ConstructorMetaMethodSite extends MetaMethodSite {

    private final int version;

    public ConstructorMetaMethodSite(CallSite site, MetaClassImpl metaClass, MetaMethod method, Class [] params) {
        super(site, metaClass, method, params);
        this.version = metaClass.getVersion();
    }

    public final Object invoke(Object receiver, Object [] args) throws Throwable{
        MetaClassHelper.unwrap(args);
        try {
            return metaMethod.doMethodInvoke(metaClass.getTheClass(), args);
        } catch (GroovyRuntimeException gre) {
            throw ScriptBytecodeAdapter.unwrap(gre);
        }
    }

    public final Object callConstructor(Object receiver, Object[] args) throws Throwable {
        if (receiver == metaClass.getTheClass() // meta class match receiver
           && ((MetaClassImpl)metaClass).getVersion() == version // metaClass still be valid
           && MetaClassHelper.sameClasses(params, args) )  
        {
            MetaClassHelper.unwrap(args);
            try {
                return metaMethod.doMethodInvoke(metaClass.getTheClass(), args);
            } catch (GroovyRuntimeException gre) {
                throw ScriptBytecodeAdapter.unwrap(gre);
            }
        } else {
          return CallSiteArray.defaultCallConstructor(this, receiver, args);
        }
    }
}