| /* TemplateNode.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.io.PrintStream; |
| import java.util.Comparator; |
| import javax.xml.namespace.QName; |
| import javax.xml.transform.TransformerException; |
| import org.w3c.dom.Node; |
| import gnu.xml.xpath.DocumentOrderComparator; |
| |
| /** |
| * Wrapper for a source node in a template. |
| * |
| * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> |
| */ |
| abstract class TemplateNode |
| { |
| |
| static final Comparator documentOrderComparator = |
| new DocumentOrderComparator(); |
| |
| TemplateNode children; |
| TemplateNode next; |
| |
| final void apply(Stylesheet stylesheet, QName mode, |
| Node context, int pos, int len, |
| Node parent, Node nextSibling) |
| throws TransformerException |
| { |
| if (stylesheet.terminated) |
| return; |
| if (Thread.currentThread().isInterrupted()) |
| { |
| // Try to head off any infinite loops at the pass |
| return; |
| } |
| if (stylesheet.debug) |
| { |
| System.err.println("Applying " + toString()); |
| System.err.println("\twith context=" + context + ", pos=" + pos + |
| ", len=" + len); |
| } |
| doApply(stylesheet, mode, context, pos, len, parent, nextSibling); |
| } |
| |
| abstract void doApply(Stylesheet stylesheet, QName mode, |
| Node context, int pos, int len, |
| Node parent, Node nextSibling) |
| throws TransformerException; |
| |
| abstract TemplateNode clone(Stylesheet stylesheet); |
| |
| public boolean references(QName var) |
| { |
| if (children != null && children.references(var)) |
| return true; |
| if (next != null && next.references(var)) |
| return true; |
| return false; |
| } |
| |
| /** |
| * Debugging |
| */ |
| void list(int depth, PrintStream out, boolean listNext) |
| { |
| for (int i = 0; i < depth; i++) |
| out.print(" "); |
| out.println(toString()); |
| if (children != null) |
| children.list(depth + 1, out, true); |
| if (listNext && next != null) |
| next.list(depth, out, listNext); |
| } |
| |
| /** |
| * Indicates whether the template for which this template node is the |
| * first node specifies the given parameter. |
| */ |
| boolean hasParam(QName name) |
| { |
| for (TemplateNode ctx = this; ctx != null; ctx = ctx.next) |
| { |
| if (ctx instanceof ParameterNode) |
| { |
| ParameterNode param = (ParameterNode) ctx; |
| if (param.type == Bindings.PARAM && param.name.equals(name)) |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| } |