1 /* EventReaderDelegate.java -- 2 Copyright (C) 2005 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 next()85 public XMLEvent next() 86 throws XMLStreamException 87 { 88 if (parent != null) 89 return parent.next(); 90 throw new NoSuchElementException(); 91 } 92 hasNext()93 public boolean hasNext() 94 throws XMLStreamException 95 { 96 if (parent != null) 97 return parent.hasNext(); 98 return false; 99 } 100 peek()101 public XMLEvent peek() 102 throws XMLStreamException 103 { 104 if (parent != null) 105 return parent.peek(); 106 return null; 107 } 108 getElementText()109 public String getElementText() 110 throws XMLStreamException 111 { 112 if (parent != null) 113 return parent.getElementText(); 114 throw new XMLStreamException(); 115 } 116 nextTag()117 public XMLEvent nextTag() 118 throws XMLStreamException 119 { 120 if (parent != null) 121 return parent.nextTag(); 122 throw new XMLStreamException(); 123 } 124 getProperty(String name)125 public Object getProperty(String name) 126 throws IllegalArgumentException 127 { 128 if (parent != null) 129 return parent.getProperty(name); 130 throw new IllegalArgumentException(name); 131 } 132 133 } 134 135