/* * Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */  package javax.print.attribute; import java.io.Serializable;import java.net.URI; /** * Class URISyntax is an abstract base class providing the common * implementation of all attributes whose value is a Uniform Resource * Identifier (URI). Once constructed, a URI attribute's value is immutable. * <P> * * @author  Alan Kaminsky */public abstract class URISyntax implements Serializable, Cloneable {     private static final long serialVersionUID = -7842661210486401678L;     /**     * URI value of this URI attribute.     * @serial     */    private URI uri;     /**     * Constructs a URI attribute with the specified URI.     *     * @param  uri  URI.     *     * @exception  NullPointerException     *     (unchecked exception) Thrown if <CODE>uri</CODE> is null.     */    protected URISyntax(URI uri) {        this.uri = verify (uri);    }     private static URI verify(URI uri) {        if (uri == null) {            throw new NullPointerException(" uri is null");        }        return uri;    }     /**     * Returns this URI attribute's URI value.     * @return the URI.     */    public URI getURI()  {        return uri;    }     /**     * Returns a hashcode for this URI attribute.     *     * @return  A hashcode value for this object.     */    public int hashCode() {        return uri.hashCode();    }     /**     * Returns whether this URI attribute is equivalent to the passed in     * object.     * To be equivalent, all of the following conditions must be true:     * <OL TYPE=1>     * <LI>     * <CODE>object</CODE> is not null.     * <LI>     * <CODE>object</CODE> is an instance of class URISyntax.     * <LI>     * This URI attribute's underlying URI and <CODE>object</CODE>'s     * underlying URI are equal.     * </OL>     *     * @param  object  Object to compare to.     *     * @return  True if <CODE>object</CODE> is equivalent to this URI     *          attribute, false otherwise.     */    public boolean equals(Object object) {        return(object != null &&               object instanceof URISyntax &&               this.uri.equals (((URISyntax) object).uri));    }     /**     * Returns a String identifying this URI attribute. The String is the     * string representation of the attribute's underlying URI.     *     * @return  A String identifying this object.     */    public String toString() {        return uri.toString();    } }