/*
* Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*/
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();
}
}