--- /dev/null
+/* SortKey.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.namespace.QName;
+import javax.xml.transform.TransformerException;
+import org.w3c.dom.Document;
+import org.w3c.dom.DocumentFragment;
+import org.w3c.dom.Node;
+import gnu.xml.xpath.Expr;
+
+/**
+ * An XSL sort key.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class SortKey
+{
+
+ static final int DEFAULT = 0;
+ static final int UPPER_FIRST = 1;
+ static final int LOWER_FIRST = 2;
+
+ final Expr select;
+ final TemplateNode langTemplate;
+ final TemplateNode dataTypeTemplate;
+ final TemplateNode orderTemplate;
+ final TemplateNode caseOrderTemplate;
+
+ transient String lang;
+ transient String dataType;
+ transient boolean descending;
+ transient int caseOrder;
+
+ SortKey(Expr select, TemplateNode lang, TemplateNode dataType,
+ TemplateNode order, TemplateNode caseOrder)
+ {
+ this.select = select;
+ this.langTemplate = lang;
+ this.dataTypeTemplate = dataType;
+ this.orderTemplate = order;
+ this.caseOrderTemplate = caseOrder;
+ }
+
+ String key(Node node)
+ {
+ Object ret = select.evaluate(node, 1, 1);
+ if (ret instanceof String)
+ {
+ return (String) ret;
+ }
+ else
+ {
+ return Expr._string(node, ret);
+ }
+ }
+
+ /**
+ * Prepare for a sort.
+ * This sets all transient variables from their AVTs.
+ */
+ void init(Stylesheet stylesheet, QName mode,
+ Node context, int pos, int len,
+ Node parent, Node nextSibling)
+ throws TransformerException
+ {
+ Document doc = (context instanceof Document) ? (Document) context :
+ context.getOwnerDocument();
+ if (langTemplate == null)
+ {
+ lang = null;
+ }
+ else
+ {
+ DocumentFragment fragment = doc.createDocumentFragment();
+ langTemplate.apply(stylesheet, mode, context, pos, len,
+ fragment, null);
+ lang = Expr.stringValue(fragment);
+ }
+ if (dataTypeTemplate == null)
+ {
+ dataType = "text";
+ }
+ else
+ {
+ DocumentFragment fragment = doc.createDocumentFragment();
+ dataTypeTemplate.apply(stylesheet, mode, context, pos, len,
+ fragment, null);
+ dataType = Expr.stringValue(fragment);
+ }
+ if (orderTemplate == null)
+ {
+ descending = false;
+ }
+ else
+ {
+ DocumentFragment fragment = doc.createDocumentFragment();
+ orderTemplate.apply(stylesheet, mode, context, pos, len,
+ fragment, null);
+ String order = Expr.stringValue(fragment);
+ descending = "descending".equals(order);
+ }
+ if (caseOrderTemplate == null)
+ {
+ caseOrder = DEFAULT;
+ }
+ else
+ {
+ DocumentFragment fragment = doc.createDocumentFragment();
+ caseOrderTemplate.apply(stylesheet, mode, context, pos, len,
+ fragment, null);
+ String co = Expr.stringValue(fragment);
+ caseOrder = "upper-first".equals(co) ? UPPER_FIRST :
+ "lower-first".equals(co) ? LOWER_FIRST :
+ DEFAULT;
+ }
+ }
+
+ boolean references(QName var)
+ {
+ if (select != null && select.references(var))
+ {
+ return true;
+ }
+ if (langTemplate != null && langTemplate.references(var))
+ {
+ return true;
+ }
+ if (dataTypeTemplate != null && dataTypeTemplate.references(var))
+ {
+ return true;
+ }
+ if (orderTemplate != null && orderTemplate.references(var))
+ {
+ return true;
+ }
+ if (caseOrderTemplate != null && caseOrderTemplate.references(var))
+ {
+ return true;
+ }
+ return false;
+ }
+
+}
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