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jeremybenn |
/* LiteralNode.java --
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Copyright (C) 2004,2006 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.StringTokenizer;
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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.NamedNodeMap;
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import org.w3c.dom.Node;
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/**
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* A template node that copies a DOM node in the template to the result
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* tree.
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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 LiteralNode
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extends TemplateNode
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{
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/**
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* The source node in the XSL template.
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*/
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final Node source;
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final Collection elementExcludeResultPrefixes;
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LiteralNode(Node source)
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{
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this.source = source;
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if (source.getNodeType() == Node.ELEMENT_NODE)
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{
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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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elementExcludeResultPrefixes.add(st.nextToken());
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}
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else
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elementExcludeResultPrefixes = Collections.EMPTY_SET;
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}
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else
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elementExcludeResultPrefixes = null;
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}
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TemplateNode clone(Stylesheet stylesheet)
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{
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TemplateNode ret = new LiteralNode(source);
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if (children != null)
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ret.children = children.clone(stylesheet);
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if (next != null)
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ret.next = next.clone(stylesheet);
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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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Node result = null;
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Document doc = (parent instanceof Document) ? (Document) parent :
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parent.getOwnerDocument();
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short nodeType = source.getNodeType();
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if (nodeType == Node.ATTRIBUTE_NODE &&
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parent.getFirstChild() != null)
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{
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// Ignore attributes added after child elements
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}
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else
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{
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// Namespace aliasing
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if (nodeType == Node.ELEMENT_NODE)
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{
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String prefix = source.getPrefix();
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if (prefix == null)
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prefix = "#default";
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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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resultPrefix = null;
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String uri = source.lookupNamespaceURI(resultPrefix);
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String name = source.getNodeName();
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// Create a new element node in the result document
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result = doc.createElementNS(uri, name);
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// copy attributes
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NamedNodeMap srcAttrs = source.getAttributes();
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NamedNodeMap dstAttrs = result.getAttributes();
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int l = srcAttrs.getLength();
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for (int i = 0; i < l; i++)
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{
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Node attr = srcAttrs.item(i);
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if (!Stylesheet.XSL_NS.equals(attr.getNamespaceURI()))
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{
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attr = attr.cloneNode(true);
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attr = doc.adoptNode(attr);
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dstAttrs.setNamedItemNS(attr);
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}
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}
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}
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}
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if (result == null)
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{
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// Create result node
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result = source.cloneNode(false);
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// Remove any XSL attributes
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NamedNodeMap attrs = result.getAttributes();
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if (attrs != null)
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{
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int l = attrs.getLength();
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for (int i = 0; i < l; i++)
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{
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Node attr = attrs.item(i);
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if (Stylesheet.XSL_NS.equals(attr.getNamespaceURI()))
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{
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attrs.removeNamedItem(attr.getNodeName());
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i--;
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l--;
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}
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}
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}
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Node result2 = doc.adoptNode(result);
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if (result2 == null)
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{
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String msg = "Error adopting node to result tree: " +
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result + " (" + result.getClass().getName() + ")";
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DOMSourceLocator l = new DOMSourceLocator(context);
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throw new TransformerException(msg, l);
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}
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result = result2;
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}
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if (nextSibling != null)
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parent.insertBefore(result, nextSibling);
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else
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parent.appendChild(result);
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if (nodeType == Node.ELEMENT_NODE)
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stylesheet.addNamespaceNodes(source, result, doc,
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elementExcludeResultPrefixes);
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// children
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if (children != null)
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children.apply(stylesheet, mode,
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context, pos, len,
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result, null);
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}
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// next sibling
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if (next != null)
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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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public String toString()
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{
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return source.toString();
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}
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}
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