org.glassfish.jersey.internal.util.collection.LazyValue Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jersey-all Show documentation

jersey-all is a rebundled verison of Jersey as one OSGi bundle.

There is a newer version: 2.22.2

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2013 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
 * http://glassfish.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 packager/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.jersey.internal.util.collection;

/**
 * Lazily initialized {@link Value value}.
 * 
 * Instances of this interface are initialized lazily during the first call to their
 * {@link #get() value retrieval method}. Information about the initialization state
 * of a {@code LazyValue} instance is available via {@link #isInitialized()} method.
 * 
 *
 * @author Marek Potociar (marek.potociar at oracle.com)
 */
public interface LazyValue extends Value {
    /**
     * Check if the lazy value has been initialized already (i.e. its {@link #get()} method
     * has already been called previously) or not.
     *
     * @return {@code true} if the lazy value has already been initialized, {@code false} otherwise.
     */
    boolean isInitialized();
}