/* AttributeNode.java -- Copyright (C) 2004 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version. */ package gnu.xml.transform; import javax.xml.XMLConstants; import javax.xml.namespace.QName; import javax.xml.transform.TransformerException; import org.w3c.dom.Document; import org.w3c.dom.DocumentFragment; import org.w3c.dom.Attr; import org.w3c.dom.NamedNodeMap; import org.w3c.dom.Node; import gnu.xml.xpath.Expr; /** * A template node representing an XSL attribute instruction. * * @author Chris Burdess */ final class AttributeNode extends TemplateNode { final TemplateNode name; final TemplateNode namespace; final Node source; AttributeNode(TemplateNode children, TemplateNode next, TemplateNode name, TemplateNode namespace, Node source) { super(children, next); this.name = name; this.namespace = namespace; this.source = source; } TemplateNode clone(Stylesheet stylesheet) { return new AttributeNode((children == null) ? null : children.clone(stylesheet), (next == null) ? null : next.clone(stylesheet), name.clone(stylesheet), (namespace == null) ? null : namespace.clone(stylesheet), source); } void doApply(Stylesheet stylesheet, QName mode, Node context, int pos, int len, Node parent, Node nextSibling) throws TransformerException { Document doc = (parent instanceof Document) ? (Document) parent : parent.getOwnerDocument(); // Create a document fragment to hold the name DocumentFragment fragment = doc.createDocumentFragment(); // Apply name to the fragment name.apply(stylesheet, mode, context, pos, len, fragment, null); // Use XPath string-value of fragment String nameValue = Expr.stringValue(fragment); String namespaceValue = null; if (namespace != null) { // Create a document fragment to hold the namespace fragment = doc.createDocumentFragment(); // Apply namespace to the fragment namespace.apply(stylesheet, mode, context, pos, len, fragment, null); // Use XPath string-value of fragment namespaceValue = Expr.stringValue(fragment); if (namespaceValue.length() == 0) { namespaceValue = null; } } String prefix = getPrefix(nameValue); if (namespaceValue == null) { if (prefix != null) { if (XMLConstants.XML_NS_PREFIX.equals(prefix)) { namespaceValue = XMLConstants.XML_NS_URI; } else { // Resolve namespace for this prefix namespaceValue = source.lookupNamespaceURI(prefix); } } } else { if (prefix != null) { String ns2 = source.lookupNamespaceURI(prefix); if (ns2 != null && !ns2.equals(namespaceValue)) { // prefix clashes, reset it prefix = null; int ci = nameValue.indexOf(':'); nameValue = nameValue.substring(ci + 1); } } } if (prefix == null) { // Resolve prefix for this namespace prefix = source.lookupPrefix(namespaceValue); if (prefix != null) { nameValue = prefix + ":" + nameValue; } else { if (namespaceValue != null) { // Must invent a prefix prefix = inventPrefix(parent); nameValue = prefix + ":" + nameValue; } } } NamedNodeMap attrs = parent.getAttributes(); boolean insert = true; if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(namespaceValue) || XMLConstants.XMLNS_ATTRIBUTE.equals(nameValue) || nameValue.startsWith("xmlns:")) { // Namespace declaration, do not output insert = false; } if (prefix != null && namespaceValue == null) { // Not a QName insert = false; } if (parent.getNodeType() == Node.ELEMENT_NODE && parent.getFirstChild() != null) { // XSLT 7.1.3 Adding an attribute to an element after children have // been added to it is an error insert = false; } if (insert) { // Insert attribute Attr attr = (namespaceValue != null) ? doc.createAttributeNS(namespaceValue, nameValue) : doc.createAttribute(nameValue); if (attrs != null) { if (namespace != null) { attrs.setNamedItemNS(attr); } else { attrs.setNamedItem(attr); } } if (children != null) { children.apply(stylesheet, mode, context, pos, len, attr, null); } } if (next != null) { next.apply(stylesheet, mode, context, pos, len, parent, nextSibling); } } final String getPrefix(String name) { int ci = name.indexOf(':'); return (ci == -1) ? null : name.substring(0, ci); } final String inventPrefix(Node parent) { String base = "ns"; int count = 0; String ret = base + Integer.toString(count); while (parent.lookupNamespaceURI(ret) != null) { count++; ret = base + Integer.toString(count); } return ret; } public String toString() { StringBuffer buf = new StringBuffer(getClass().getName()); buf.append('['); buf.append("name="); buf.append(name); buf.append(']'); return buf.toString(); } }