1 /* 2 * Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 27 package javax.print.attribute; 28 29 import java.io.Serializable; 30 import java.util.Locale; 31 32 /** 33 * Class TextSyntax is an abstract base class providing the common 34 * implementation of all attributes whose value is a string. The text attribute 35 * includes a locale to indicate the natural language. Thus, a text attribute 36 * always represents a localized string. Once constructed, a text attribute's 37 * value is immutable. 38 * <P> 39 * 40 * @author David Mendenhall 41 * @author Alan Kaminsky 42 */ 43 public abstract class TextSyntax implements Serializable, Cloneable { 44 45 private static final long serialVersionUID = -8130648736378144102L; 46 47 /** 48 * String value of this text attribute. 49 * @serial 50 */ 51 private String value; 52 53 /** 54 * Locale of this text attribute. 55 * @serial 56 */ 57 private Locale locale; 58 59 /** 60 * Constructs a TextAttribute with the specified string and locale. 61 * 62 * @param value Text string. 63 * @param locale Natural language of the text string. null 64 * is interpreted to mean the default locale for as returned 65 * by <code>Locale.getDefault()</code> 66 * 67 * @exception NullPointerException 68 * (unchecked exception) Thrown if <CODE>value</CODE> is null. 69 */ 70 protected TextSyntax(String value, Locale locale) { 71 this.value = verify (value); 72 this.locale = verify (locale); 73 } 74 75 private static String verify(String value) { 76 if (value == null) { 77 throw new NullPointerException(" value is null"); 78 } 79 return value; 80 } 81 82 private static Locale verify(Locale locale) { 83 if (locale == null) { 84 return Locale.getDefault(); 85 } 86 return locale; 87 } 88 89 /** 90 * Returns this text attribute's text string. 91 * @return the text string. 92 */ 93 public String getValue() { 94 return value; 95 } 96 97 /** 98 * Returns this text attribute's text string's natural language (locale). 99 * @return the locale 100 */ 101 public Locale getLocale() { 102 return locale; 103 } 104 105 /** 106 * Returns a hashcode for this text attribute. 107 * 108 * @return A hashcode value for this object. 109 */ 110 public int hashCode() { 111 return value.hashCode() ^ locale.hashCode(); 112 } 113 114 /** 115 * Returns whether this text attribute is equivalent to the passed in 116 * object. To be equivalent, all of the following conditions must be true: 117 * <OL TYPE=1> 118 * <LI> 119 * <CODE>object</CODE> is not null. 120 * <LI> 121 * <CODE>object</CODE> is an instance of class TextSyntax. 122 * <LI> 123 * This text attribute's underlying string and <CODE>object</CODE>'s 124 * underlying string are equal. 125 * <LI> 126 * This text attribute's locale and <CODE>object</CODE>'s locale are 127 * equal. 128 * </OL> 129 * 130 * @param object Object to compare to. 131 * 132 * @return True if <CODE>object</CODE> is equivalent to this text 133 * attribute, false otherwise. 134 */ 135 public boolean equals(Object object) { 136 return(object != null && 137 object instanceof TextSyntax && 138 this.value.equals (((TextSyntax) object).value) && 139 this.locale.equals (((TextSyntax) object).locale)); 140 } 141 142 /** 143 * Returns a String identifying this text attribute. The String is 144 * the attribute's underlying text string. 145 * 146 * @return A String identifying this object. 147 */ 148 public String toString(){ 149 return value; 150 } 151 152 }