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/* * @(#)URISyntax.java 1.7 05/11/17 * * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ package javax.print.attribute; import java.io.Serializable; import java.net.URI; import java.net.URISyntaxException; /** * 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(); } }