/*
* 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.util.Locale;
/**
* Class TextSyntax is an abstract base class providing the common
* implementation of all attributes whose value is a string. The text attribute
* includes a locale to indicate the natural language. Thus, a text attribute
* always represents a localized string. Once constructed, a text attribute's
* value is immutable.
* <P>
*
* @author David Mendenhall
* @author Alan Kaminsky
*/
public abstract class TextSyntax implements Serializable, Cloneable {
private static final long serialVersionUID = -8130648736378144102L;
/**
* String value of this text attribute.
* @serial
*/
private String value;
/**
* Locale of this text attribute.
* @serial
*/
private Locale locale;
/**
* Constructs a TextAttribute with the specified string and locale.
*
* @param value Text string.
* @param locale Natural language of the text string. null
* is interpreted to mean the default locale for as returned
* by <code>Locale.getDefault()</code>
*
* @exception NullPointerException
* (unchecked exception) Thrown if <CODE>value</CODE> is null.
*/
protected TextSyntax(String value, Locale locale) {
this.value = verify (value);
this.locale = verify (locale);
}
private static String verify(String value) {
if (value == null) {
throw new NullPointerException(" value is null");
}
return value;
}
private static Locale verify(Locale locale) {
if (locale == null) {
return Locale.getDefault();
}
return locale;
}
/**
* Returns this text attribute's text string.
* @return the text string.
*/
public String getValue() {
return value;
}
/**
* Returns this text attribute's text string's natural language (locale).
* @return the locale
*/
public Locale getLocale() {
return locale;
}
/**
* Returns a hashcode for this text attribute.
*
* @return A hashcode value for this object.
*/
public int hashCode() {
return value.hashCode() ^ locale.hashCode();
}
/**
* Returns whether this text 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 TextSyntax.
* <LI>
* This text attribute's underlying string and <CODE>object</CODE>'s
* underlying string are equal.
* <LI>
* This text attribute's locale and <CODE>object</CODE>'s locale are
* equal.
* </OL>
*
* @param object Object to compare to.
*
* @return True if <CODE>object</CODE> is equivalent to this text
* attribute, false otherwise.
*/
public boolean equals(Object object) {
return(object != null &&
object instanceof TextSyntax &&
this.value.equals (((TextSyntax) object).value) &&
this.locale.equals (((TextSyntax) object).locale));
}
/**
* Returns a String identifying this text attribute. The String is
* the attribute's underlying text string.
*
* @return A String identifying this object.
*/
public String toString(){
return value;
}
}