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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. 
Author:
Alan Kaminsky/**
 * Class {@code URISyntax} is an abstract base class providing the common
 * implementation of all attributes whose value is a Uniform Resource Identifier
 * (URI). Once constructed, a {@code URI} attribute's value is immutable.
 *
 * @author Alan Kaminsky
 */
public abstract class URISyntax implements Serializable, Cloneable {

    
Use serialVersionUID from JDK 1.4 for interoperability.
/**
     * Use serialVersionUID from JDK 1.4 for interoperability.
     */
    private static final long serialVersionUID = -7842661210486401678L;

    
URI value of this URI attribute. 
@serial
/**
     * {@code URI} value of this {@code URI} attribute.
     *
     * @serial
     */
    private URI uri;

    
Constructs a URI attribute with the specified URI. 
Params:
uri – the URI
Throws:
NullPointerException – if uri is null/**
     * Constructs a {@code URI} attribute with the specified {@code URI}.
     *
     * @param  uri the {@code URI}
     * @throws NullPointerException if {@code uri} is {@code 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. 
Returns:
the URI/**
     * Returns this {@code URI} attribute's {@code URI} value.
     *
     * @return the {@code URI}
     */
    public URI getURI()  {
        return uri;
    }

    
Returns a hashcode for this URI attribute. 
Returns:
a hashcode value for this object/**
     * Returns a hashcode for this {@code 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: 

  
object is not null. 
object is an instance of class URISyntax. 
This URI attribute's underlying URI and object's underlying URI are equal. 
Params:
object – Object to compare to
Returns:
true if object is equivalent to this URI attribute, false otherwise/**
     * Returns whether this {@code 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} is not {@code null}.
     *   <li>{@code object} is an instance of class {@code URISyntax}.
     *   <li>This {@code URI} attribute's underlying {@code URI} and
     *   {@code object}'s underlying {@code URI} are equal.
     * </ol>
     *
     * @param  object {@code Object} to compare to
     * @return {@code true} if {@code object} is equivalent to this {@code URI}
     *         attribute, {@code 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. 
Returns:
a String identifying this object/**
     * Returns a {@code String} identifying this {@code URI} attribute. The
     * {@code String} is the string representation of the attribute's underlying
     * {@code URI}.
     *
     * @return a {@code String} identifying this object
     */
    public String toString() {
        return uri.toString();
    }
}