com.sun.xml.bind.v2.runtime.property.UnmarshallerChain Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of webservices-rt Show documentation
This module contains the Metro runtime code.
There is a newer version: 4.0.4
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2017 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://oss.oracle.com/licenses/CDDL+GPL-1.1
 * or 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 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 com.sun.xml.bind.v2.runtime.property;

import com.sun.xml.bind.v2.runtime.JAXBContextImpl;
import com.sun.xml.bind.v2.runtime.unmarshaller.Scope;


/**
 * Pass around a 'ticket dispenser' when creating new
 * unmarshallers. This controls the index of the slot
 * allocated to the chain of handlers.

 *
 * 
 * A ticket dispenser also maintains the offset for handlers
 * to access state slots. A handler records this value when it's created.
 * 
 *
 */
public final class UnmarshallerChain {
    /**
     * This offset allows child unmarshallers to have its own {@link Scope} without colliding with siblings.
     */
    private int offset = 0;

    public final JAXBContextImpl context;

    public UnmarshallerChain(JAXBContextImpl context) {
        this.context = context;
    }

    /**
     * Allocates a new {@link Scope} offset.
     */
    public int allocateOffset() {
        return offset++;
    }

    /**
     * Gets the number of total scope offset allocated.
     */
    public int getScopeSize() {
        return offset;
    }
}