--- /dev/null
+/* 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., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 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 <code>attribute</code> instruction.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class AttributeNode
+ extends TemplateNode
+{
+
+ final TemplateNode name;
+ final TemplateNode namespace;
+ final Node source;
+
+ AttributeNode(TemplateNode name,
+ TemplateNode namespace, Node source)
+ {
+ this.name = name;
+ this.namespace = namespace;
+ this.source = source;
+ }
+
+ TemplateNode clone(Stylesheet stylesheet)
+ {
+ TemplateNode ret = new AttributeNode(name.clone(stylesheet),
+ (namespace == null) ? null :
+ namespace.clone(stylesheet),
+ source);
+ if (children != null)
+ {
+ ret.children = children.clone(stylesheet);
+ }
+ if (next != null)
+ {
+ ret.next = next.clone(stylesheet);
+ }
+ return ret;
+ }
+
+ 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 boolean references(QName var)
+ {
+ if (name != null && name.references(var))
+ {
+ return true;
+ }
+ if (namespace != null && namespace.references(var))
+ {
+ return true;
+ }
+ return super.references(var);
+ }
+
+ public String toString()
+ {
+ StringBuffer buf = new StringBuffer(getClass().getName());
+ buf.append('[');
+ buf.append("name=");
+ buf.append(name);
+ buf.append(']');
+ return buf.toString();
+ }
+
+}
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