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1: /* DomNsNode.java -- 2: Copyright (C) 1999,2000,2001,2004 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.dom; 39: 40: import javax.xml.XMLConstants; 41: import org.w3c.dom.DOMException; 42: 43: /** 44: * <p> Abstract implemention of namespace support. This facilitates 45: * sharing code for attribute and element nodes. 46: * 47: * @author David Brownell 48: * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> 49: */ 50: public abstract class DomNsNode 51: extends DomNode 52: { 53: 54: private String name; 55: private String namespace; 56: private String prefix; 57: private String localName; 58: 59: /** 60: * Constructs a node associated with the specified document, and 61: * with the specified namespace information. 62: * 63: * @param owner The document with which this entity is associated 64: * @param namespaceURI Combined with the local part of the name, 65: * this identifies a type of element or attribute; may be null. 66: * If this is the empty string, it is reassigned as null so that 67: * applications only need to test that case. 68: * @param name Name of this node, which may include a prefix 69: */ 70: // package private 71: DomNsNode(short nodeType, DomDocument owner, String namespaceURI, String name) 72: { 73: super(nodeType, owner); 74: setNodeName(name); 75: setNamespaceURI(namespaceURI); 76: } 77: 78: /** 79: * Constructs a node associated with the specified document, and 80: * with the specified namespace information. The prefix and local part 81: * are given explicitly rather than being computed. This allows them 82: * to be explicitly set to {@code null} as required by 83: * {@link Document#createElement(String)}. 84: * 85: * @param owner The document with which this entity is associated 86: * @param namespaceURI Combined with the local part of the name, 87: * this identifies a type of element or attribute; may be null. 88: * If this is the empty string, it is reassigned as null so that 89: * applications only need to test that case. 90: * @param name Name of this node, which may include a prefix 91: * @param prefix the namespace prefix of the name. May be {@code null}. 92: * @param localName the local part of the name. May be {@code null}. 93: */ 94: // package private 95: DomNsNode(short nodeType, DomDocument owner, String namespaceURI, String name, 96: String prefix, String localName) 97: { 98: super(nodeType, owner); 99: this.name = name.intern(); 100: this.prefix = prefix == null ? null : prefix.intern(); 101: this.localName = localName == null ? null : localName.intern(); 102: setNamespaceURI(namespaceURI); 103: } 104: 105: /** 106: * <b>DOM L1</b> 107: * Returns the node's name, including any namespace prefix. 108: */ 109: public final String getNodeName() 110: { 111: return name; 112: } 113: 114: final void setNodeName(String name) 115: { 116: this.name = name.intern(); 117: int index = name.indexOf(':'); 118: if (index == -1) 119: { 120: prefix = null; 121: localName = this.name; 122: } 123: else 124: { 125: prefix = name.substring(0, index).intern(); 126: localName = name.substring(index + 1).intern(); 127: } 128: } 129: 130: /** 131: * <b>DOM L2</b> 132: * Returns the node's namespace URI 133: * <em>or null</em> if the node name is not namespace scoped. 134: */ 135: public final String getNamespaceURI() 136: { 137: return namespace; 138: } 139: 140: final void setNamespaceURI(String namespaceURI) 141: { 142: if ("".equals(namespaceURI)) 143: { 144: namespaceURI = null; 145: } 146: namespace = (namespaceURI == null) ? null : namespaceURI.intern(); 147: } 148: 149: /** 150: * <b>DOM L2</b> 151: * Returns any prefix part of the node's name (before any colon). 152: */ 153: public final String getPrefix() 154: { 155: return prefix; 156: } 157: 158: /** 159: * <b>DOM L2</b> 160: * Assigns the prefix part of the node's name (before any colon). 161: */ 162: public final void setPrefix(String prefix) 163: { 164: if (readonly) 165: { 166: throw new DomDOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR); 167: } 168: 169: if (prefix == null) 170: { 171: name = localName; 172: return; 173: } 174: else if (namespace == null) 175: { 176: throw new DomDOMException(DOMException.NAMESPACE_ERR, 177: "can't set prefix, node has no namespace URI", 178: this, 0); 179: } 180: 181: DomDocument.checkName(prefix, "1.1".equals(owner.getXmlVersion())); 182: if (prefix.indexOf (':') != -1) 183: { 184: throw new DomDOMException(DOMException.NAMESPACE_ERR, 185: "illegal prefix " + prefix, this, 0); 186: } 187: 188: if (XMLConstants.XML_NS_PREFIX.equals(prefix) 189: && !XMLConstants.XML_NS_URI.equals(namespace)) 190: { 191: throw new DomDOMException(DOMException.NAMESPACE_ERR, 192: "xml namespace is always " + 193: XMLConstants.XML_NS_URI, this, 0); 194: } 195: 196: if (XMLConstants.XMLNS_ATTRIBUTE.equals(prefix)) 197: { 198: if (namespace != null || getNodeType() != ATTRIBUTE_NODE) 199: { 200: throw new DomDOMException(DOMException.NAMESPACE_ERR, 201: "xmlns attribute prefix is reserved", 202: this, 0); 203: } 204: } 205: else if (getNodeType () == ATTRIBUTE_NODE 206: && (XMLConstants.XMLNS_ATTRIBUTE.equals(name) || 207: name.startsWith("xmlns:"))) 208: { 209: throw new DomDOMException(DOMException.NAMESPACE_ERR, 210: "namespace declarations can't change names", 211: this, 0); 212: } 213: 214: this.prefix = prefix.intern(); 215: } 216: 217: /** 218: * <b>DOM L2</b> 219: * Returns the local part of the node's name (after any colon). 220: */ 221: public final String getLocalName() 222: { 223: return localName; 224: } 225: 226: }