Initial revision

From-SVN: r102074

libjava/classpath/gnu/xml/transform/ValueOfNode.java

@@ -0,0 +1,161 @@
+/* ValueOfNode.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.Collection;
+import java.util.Iterator;
+import javax.xml.namespace.QName;
+import javax.xml.transform.TransformerException;
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+import org.w3c.dom.Text;
+import gnu.xml.xpath.Expr;
+
+/**
+ * A template node representing an XSLT <code>value-of</code> instruction.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class ValueOfNode
+  extends TemplateNode
+{
+
+  final Expr select;
+  final boolean disableOutputEscaping;
+
+  ValueOfNode(Expr select, boolean disableOutputEscaping)
+  {
+    this.select = select;
+    this.disableOutputEscaping = disableOutputEscaping;
+  }
+
+  TemplateNode clone(Stylesheet stylesheet)
+  {
+    TemplateNode ret = new ValueOfNode(select.clone(stylesheet),
+                                       disableOutputEscaping);
+    if (children != null)
+      {
+        ret.children = children.clone(stylesheet);
+      }
+    if (next != null)
+      {
+        ret.next = next.clone(stylesheet);
+      }
+    return ret;
+  }
+
+  void doApply(Stylesheet stylesheet, QName mode,
+             Node context, int pos, int len,
+             Node parent, Node nextSibling)
+    throws TransformerException
+  {
+    Object ret = select.evaluate(context, pos, len);
+    /*if (stylesheet.debug)
+      {
+        System.err.println("value-of: " + select + " -> " + ret);
+      }*/
+    String value;
+    if (ret instanceof Collection)
+      {
+        StringBuffer buf = new StringBuffer();
+        for (Iterator i = ((Collection) ret).iterator(); i.hasNext(); )
+          {
+            Node node = (Node) i.next();
+            buf.append(Expr.stringValue(node));
+          }
+        value = buf.toString();
+      }
+    else
+      {
+        value = Expr._string(context, ret);
+      }
+    if (stylesheet.debug)
+      {
+        System.err.println("value-of: "+context+" "+ select + " -> "+ value);
+      }
+    if (value != null && value.length() > 0)
+      {
+        Document doc = (parent instanceof Document) ?
+          (Document) parent : parent.getOwnerDocument();
+        Text textNode = doc.createTextNode(value);
+        if (disableOutputEscaping)
+          {
+            textNode.setUserData("disable-output-escaping", "yes", stylesheet);
+          }
+        if (nextSibling != null)
+          {
+            parent.insertBefore(textNode, nextSibling);
+          }
+        else
+          {
+            parent.appendChild(textNode);
+          }
+      }
+    // value-of doesn't process children
+    if (next != null)
+      {
+        next.apply(stylesheet, mode,
+                   context, pos, len,
+                   parent, nextSibling);
+      }
+  }
+
+  public boolean references(QName var)
+  {
+    if (select != null && select.references(var))
+      {
+        return true;
+      }
+    return super.references(var);
+  }
+  
+  public String toString()
+  {
+    StringBuffer buf = new StringBuffer(getClass().getName());
+    buf.append('[');
+    buf.append("select=");
+    buf.append(select);
+    if (disableOutputEscaping)
+      {
+        buf.append(",disableOutputEscaping");
+      }
+    buf.append(']');
+    return buf.toString();
+  }
+  
+}