| /* 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., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 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; |
| } |
| } |
| |
| } |