--- /dev/null
+/* XSLComparator.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 java.util.Comparator;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Locale;
+import java.text.Collator;
+import org.w3c.dom.Node;
+import gnu.xml.xpath.Expr;
+
+/**
+ * Comparator for sorting lists of nodes according to a list of sort keys.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+class XSLComparator
+ implements Comparator
+{
+
+ final List sortKeys;
+
+ XSLComparator(List sortKeys)
+ {
+ this.sortKeys = sortKeys;
+ }
+
+ public int compare(Object o1, Object o2)
+ {
+ if (o1 instanceof Node && o2 instanceof Node)
+ {
+ Node n1 = (Node) o1;
+ Node n2 = (Node) o2;
+ for (Iterator i = sortKeys.iterator(); i.hasNext(); )
+ {
+ SortKey sortKey = (SortKey) i.next();
+ String k1 = sortKey.key(n1);
+ String k2 = sortKey.key(n2);
+ if ("text".equals(sortKey.dataType))
+ {
+ Locale locale = (sortKey.lang == null) ? Locale.getDefault() :
+ new Locale(sortKey.lang);
+ Collator collator = Collator.getInstance(locale);
+ int d = collator.compare(k1, k2);
+ if (d != 0)
+ {
+ switch (sortKey.caseOrder)
+ {
+ case SortKey.UPPER_FIRST:
+ // TODO
+ break;
+ case SortKey.LOWER_FIRST:
+ // TODO
+ break;
+ }
+ if (sortKey.descending)
+ {
+ d = -d;
+ }
+ return d;
+ }
+ }
+ else if ("number".equals(sortKey.dataType))
+ {
+ double kn1 = Expr._number(n1, k1);
+ double kn2 = Expr._number(n2, k2);
+ int d;
+ if (Double.isNaN(kn1) || Double.isInfinite(kn2))
+ {
+ d = -1;
+ }
+ else if (Double.isNaN(kn2) || Double.isInfinite(kn1))
+ {
+ d = 1;
+ }
+ else
+ {
+ // conversion to int may give 0 for small numbers
+ d = (kn1 > kn2) ? 1 : (kn1 < kn2) ? -1 : 0;
+ }
+ return (sortKey.descending) ? -d : d;
+ }
+ }
+ }
+ return 0;
+ }
+
+}
OSDN Git Service
