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1: /* XMLEventReaderImpl.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 gnu.xml.stream; 39: 40: import javax.xml.stream.XMLEventReader; 41: import javax.xml.stream.XMLStreamConstants; 42: import javax.xml.stream.XMLStreamException; 43: import javax.xml.stream.XMLStreamReader; 44: import javax.xml.stream.events.XMLEvent; 45: import javax.xml.stream.util.XMLEventAllocator; 46: 47: /** 48: * Parser using XML events. 49: * 50: * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> 51: */ 52: public class XMLEventReaderImpl 53: implements XMLEventReader 54: { 55: 56: protected final XMLStreamReader reader; 57: protected final XMLEventAllocator allocator; 58: protected final String systemId; 59: protected XMLEvent peekEvent; 60: 61: protected XMLEventReaderImpl(XMLStreamReader reader, 62: XMLEventAllocator allocator, 63: String systemId) 64: { 65: this.reader = reader; 66: this.allocator = allocator; 67: this.systemId = systemId; 68: } 69: 70: public XMLEvent next() 71: throws XMLStreamException 72: { 73: XMLEvent ret = peek(); 74: peekEvent = null; 75: return ret; 76: } 77: 78: public boolean hasNext() 79: throws XMLStreamException 80: { 81: return peekEvent != null || reader.hasNext(); 82: } 83: 84: public XMLEvent peek() 85: throws XMLStreamException 86: { 87: if (peekEvent != null) 88: return peekEvent; 89: if (!reader.hasNext()) 90: return null; 91: reader.next(); 92: peekEvent = allocator.allocate(reader); 93: return peekEvent; 94: } 95: 96: public String getElementText() 97: throws XMLStreamException 98: { 99: return reader.getElementText(); 100: } 101: 102: public XMLEvent nextTag() 103: throws XMLStreamException 104: { 105: if (peekEvent != null) 106: { 107: int eventType = peekEvent.getEventType(); 108: if (eventType == XMLStreamConstants.START_ELEMENT || 109: eventType == XMLStreamConstants.END_ELEMENT) 110: return peekEvent; 111: else 112: peekEvent = null; 113: } 114: reader.nextTag(); 115: return allocator.allocate(reader); 116: } 117: 118: public Object getProperty(String name) 119: throws IllegalArgumentException 120: { 121: return reader.getProperty(name); 122: } 123: 124: }