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From-SVN: r102074
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Tom Tromey
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296
libjava/classpath/gnu/xml/transform/ElementNode.java
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296
libjava/classpath/gnu/xml/transform/ElementNode.java
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/* ElementNode.java --
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Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.xml.transform;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.StringTokenizer;
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import javax.xml.XMLConstants;
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import javax.xml.namespace.QName;
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import javax.xml.transform.TransformerException;
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import org.w3c.dom.Document;
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import org.w3c.dom.DocumentFragment;
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import org.w3c.dom.Element;
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import org.w3c.dom.NamedNodeMap;
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import org.w3c.dom.Node;
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import gnu.xml.xpath.Expr;
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/**
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* A template node representing an XSL <code>element</code> instruction.
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*
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* @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
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*/
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final class ElementNode
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extends TemplateNode
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{
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final TemplateNode name;
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final TemplateNode namespace;
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final String uas;
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final Node source;
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final Collection elementExcludeResultPrefixes;
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ElementNode(TemplateNode name,
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TemplateNode namespace, String uas, Node source)
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{
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this.name = name;
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this.namespace = namespace;
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this.uas = uas;
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this.source = source;
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NamedNodeMap attrs = source.getAttributes();
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Node attr = attrs.getNamedItemNS(Stylesheet.XSL_NS,
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"exclude-result-prefixes");
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if (attr != null)
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{
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elementExcludeResultPrefixes = new HashSet();
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StringTokenizer st = new StringTokenizer(attr.getNodeValue());
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while (st.hasMoreTokens())
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{
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elementExcludeResultPrefixes.add(st.nextToken());
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}
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}
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else
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{
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elementExcludeResultPrefixes = Collections.EMPTY_SET;
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}
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}
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TemplateNode clone(Stylesheet stylesheet)
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{
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TemplateNode ret = new ElementNode(name.clone(stylesheet),
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(namespace == null) ? null :
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namespace.clone(stylesheet),
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uas, source);
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if (children != null)
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{
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ret.children = children.clone(stylesheet);
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}
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if (next != null)
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{
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ret.next = next.clone(stylesheet);
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}
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return ret;
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}
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void doApply(Stylesheet stylesheet, QName mode,
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Node context, int pos, int len,
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Node parent, Node nextSibling)
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throws TransformerException
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{
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Document doc = (parent instanceof Document) ? (Document) parent :
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parent.getOwnerDocument();
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// Create a document fragment to hold the name
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DocumentFragment fragment = doc.createDocumentFragment();
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// Apply name to the fragment
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name.apply(stylesheet, mode,
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context, pos, len,
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fragment, null);
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// Use XPath string-value of fragment
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String nameValue = Expr.stringValue(fragment);
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String namespaceValue = null;
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if (namespace != null)
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{
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// Create a document fragment to hold the namespace
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fragment = doc.createDocumentFragment();
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// Apply namespace to the fragment
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namespace.apply(stylesheet, mode,
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context, pos, len,
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fragment, null);
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// Use XPath string-value of fragment
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namespaceValue = Expr.stringValue(fragment);
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if (namespaceValue.length() == 0)
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{
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namespaceValue = null;
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}
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}
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String prefix = getPrefix(nameValue);
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if (XMLConstants.XMLNS_ATTRIBUTE.equals(prefix))
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{
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int ci = nameValue.indexOf(':');
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nameValue = nameValue.substring(ci + 1);
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}
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else
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{
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// Namespace aliasing
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if (prefix == null)
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{
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prefix = "#default";
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}
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String resultPrefix =
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(String) stylesheet.namespaceAliases.get(prefix);
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if (resultPrefix != null)
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{
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if ("#default".equals(resultPrefix))
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{
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resultPrefix = null;
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}
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namespaceValue = source.lookupNamespaceURI(resultPrefix);
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}
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if (prefix == "#default")
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{
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prefix = null;
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}
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// Look up ordinary namespace for this prefix
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if (namespaceValue == null)
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{
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if (XMLConstants.XML_NS_PREFIX.equals(prefix))
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{
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namespaceValue = XMLConstants.XML_NS_URI;
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}
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else
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{
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// Resolve namespace for this prefix
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namespaceValue = source.lookupNamespaceURI(prefix);
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}
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}
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/*if (prefix == null)
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{
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// Resolve prefix for this namespace
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prefix = parent.lookupPrefix(namespaceValue);
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if (prefix != null)
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{
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nameValue = prefix + ":" + nameValue;
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}
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}*/
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}
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// Create element
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Element element = (namespaceValue != null) ?
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doc.createElementNS(namespaceValue, nameValue) :
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doc.createElement(nameValue);
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if (nextSibling != null)
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{
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parent.insertBefore(element, nextSibling);
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}
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else
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{
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parent.appendChild(element);
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}
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stylesheet.addNamespaceNodes(source, element, doc,
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elementExcludeResultPrefixes);
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if (uas != null)
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{
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StringTokenizer st = new StringTokenizer(uas, " ");
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while (st.hasMoreTokens())
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{
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addAttributeSet(stylesheet, mode, context, pos, len,
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element, null, st.nextToken());
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}
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}
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if (children != null)
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{
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children.apply(stylesheet, mode,
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context, pos, len,
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element, null);
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}
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if (next != null)
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{
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next.apply(stylesheet, mode,
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context, pos, len,
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parent, nextSibling);
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}
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}
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final String getPrefix(String name)
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{
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int ci = name.indexOf(':');
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return (ci == -1) ? null : name.substring(0, ci);
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}
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void addAttributeSet(Stylesheet stylesheet, QName mode,
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Node context, int pos, int len,
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Node parent, Node nextSibling, String attributeSet)
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throws TransformerException
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{
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for (Iterator i = stylesheet.attributeSets.iterator(); i.hasNext(); )
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{
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AttributeSet as = (AttributeSet) i.next();
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if (!as.name.equals(attributeSet))
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{
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continue;
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}
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if (as.uas != null)
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{
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StringTokenizer st = new StringTokenizer(as.uas, " ");
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while (st.hasMoreTokens())
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{
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addAttributeSet(stylesheet, mode, context, pos, len,
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parent, nextSibling, st.nextToken());
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}
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}
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if (as.children != null)
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{
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as.children.apply(stylesheet, mode,
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context, pos, len,
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parent, nextSibling);
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}
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}
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}
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public boolean references(QName var)
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{
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if (name != null && name.references(var))
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{
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return true;
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}
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if (namespace != null && namespace.references(var))
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{
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return true;
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}
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return super.references(var);
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}
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public String toString()
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{
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StringBuffer buf = new StringBuffer(getClass().getName());
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buf.append('[');
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buf.append("name=");
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buf.append(name);
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if (uas != null)
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{
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buf.append(",uas=");
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buf.append(uas);
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}
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buf.append(']');
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return buf.toString();
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}
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}
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