org.glassfish.pfl.tf.timer.spi.NamedBase Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of pfl-tf Show documentation
There is a newer version: 5.0.0
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * 
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 * 
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 * 
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package org.glassfish.pfl.tf.timer.spi ;

// A very simple class that represents something with a name,
// which is hashed on that name.
public abstract class NamedBase implements Named {
    private TimerFactory factory ;
    private String name ;
    private String toStringName ;

    protected NamedBase( TimerFactory factory, String name ) {
	this.name = name ;
	if (factory != null) 
	    setFactory( factory ) ;
    }

    protected void setFactory( TimerFactory factory ) {
	if (this.factory == null) {
	    this.factory = factory ;
	    final String className = this.getClass().getName() ;
	    final int lastDot = className.lastIndexOf( '.' ) ;
	    this.toStringName = className.substring( lastDot + 1 ) 
		+ "[" + factory.name() + ":" + name + "]";
	} else {
	    throw new IllegalStateException( "NamedBase.factory can only be set once!" ) ;
	}
    }

    private void checkFactorySet() {
	if (factory == null)
	    throw new IllegalStateException( "NamedBase.factory is not set!" ) ;
    }

    public TimerFactory factory() {
	checkFactorySet() ;
	return factory ;
    }

    public String name() {
	return name ;
    }

    public boolean equals( Object obj ) {
	if (obj == this)
	    return true ;

	if (!(obj instanceof Named)) 
	    return false ;

	Named other = Named.class.cast( obj ) ;
	return other.name().equals( name ) && 
            other.getClass().equals( this.getClass() ) ;
    }

    public int hashCode() {
	return name.hashCode() ;
    }

    public String toString() {
	checkFactorySet() ;
	return toStringName ;
    }
}