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1: /* NaturalLanguageSyntax.java -- 2: Copyright (C) 2006 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: 39: package gnu.javax.print.ipp.attribute; 40: 41: import java.io.Serializable; 42: 43: /** 44: * <code>NaturalLanguageSyntax</code> is the abstract base class of all 45: * attribute classes which provide a natural language (US-ASCII) 46: * string as value. 47: * 48: * @author Wolfgang Baer (WBaer@gmx.de) 49: */ 50: public abstract class NaturalLanguageSyntax 51: implements Cloneable, Serializable 52: { 53: private final String value; 54: 55: /** 56: * Creates a <code>NaturalLanguageSyntax</code> object with the given value 57: * and locale. 58: * 59: * @param value the value for this syntax 60: * 61: * @exception NullPointerException if value is null 62: */ 63: protected NaturalLanguageSyntax(String value) 64: { 65: if (value == null) 66: throw new NullPointerException("value may not be null"); 67: 68: this.value = value; 69: } 70: 71: /** 72: * Returns the value of this syntax object. 73: * 74: * @return The value. 75: */ 76: public String getValue() 77: { 78: return value; 79: } 80: 81: /** 82: * Returns the hashcode for this object. 83: * 84: * @return The hashcode. 85: */ 86: public int hashCode() 87: { 88: return value.hashCode(); 89: } 90: 91: /** 92: * Tests if the given object is equal to this object. 93: * 94: * @param obj the object to test 95: * 96: * @return true if both objects are equal, false otherwise. 97: */ 98: public boolean equals(Object obj) 99: { 100: if (! (obj instanceof NaturalLanguageSyntax)) 101: return false; 102: 103: NaturalLanguageSyntax tmp = (NaturalLanguageSyntax) obj; 104: return value.equals(tmp.getValue()); 105: } 106: 107: /** 108: * Returns a string representing the object. The returned 109: * string is the underlying text value of this object. 110: * 111: * @return The string representation. 112: */ 113: public String toString() 114: { 115: return getValue(); 116: } 117: }