1 /* EventReaderDelegate.java -- 2 Copyright (C) 2005,2006 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 package javax.xml.stream.util; 39 40 import java.util.NoSuchElementException; 41 import javax.xml.stream.XMLStreamException; 42 import javax.xml.stream.XMLEventReader; 43 import javax.xml.stream.events.XMLEvent; 44 45 /** 46 * Base class for event reader filters. 47 */ 48 public class EventReaderDelegate 49 implements XMLEventReader 50 { 51 52 private XMLEventReader parent; 53 54 /** 55 * Constructs an empty filter with no parent set. 56 */ EventReaderDelegate()57 public EventReaderDelegate() 58 { 59 } 60 61 /** 62 * Constructs an empty filter with the given parent. 63 */ EventReaderDelegate(XMLEventReader reader)64 public EventReaderDelegate(XMLEventReader reader) 65 { 66 parent = reader; 67 } 68 69 /** 70 * Sets the parent. 71 */ setParent(XMLEventReader reader)72 public void setParent(XMLEventReader reader) 73 { 74 parent = reader; 75 } 76 77 /** 78 * Returns the parent. 79 */ getParent()80 public XMLEventReader getParent() 81 { 82 return parent; 83 } 84 nextEvent()85 public XMLEvent nextEvent() 86 throws XMLStreamException 87 { 88 if (parent != null) 89 return parent.nextEvent(); 90 throw new NoSuchElementException(); 91 } 92 next()93 public Object next() 94 { 95 if (parent != null) 96 return parent.next(); 97 throw new NoSuchElementException(); 98 } 99 hasNext()100 public boolean hasNext() 101 { 102 if (parent != null) 103 return parent.hasNext(); 104 return false; 105 } 106 peek()107 public XMLEvent peek() 108 throws XMLStreamException 109 { 110 if (parent != null) 111 return parent.peek(); 112 return null; 113 } 114 getElementText()115 public String getElementText() 116 throws XMLStreamException 117 { 118 if (parent != null) 119 return parent.getElementText(); 120 throw new XMLStreamException(); 121 } 122 nextTag()123 public XMLEvent nextTag() 124 throws XMLStreamException 125 { 126 if (parent != null) 127 return parent.nextTag(); 128 throw new XMLStreamException(); 129 } 130 getProperty(String name)131 public Object getProperty(String name) 132 throws IllegalArgumentException 133 { 134 if (parent != null) 135 return parent.getProperty(name); 136 throw new IllegalArgumentException(name); 137 } 138 close()139 public void close() 140 throws XMLStreamException 141 { 142 if (parent != null) 143 parent.close(); 144 } 145 remove()146 public void remove() 147 { 148 throw new UnsupportedOperationException(); 149 } 150 151 } 152