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+/* 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<Node> 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;
+ }
+
+}