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

   1 /* CallTemplateNode.java --
   2    Copyright (C) 2004,2006 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38 package gnu.xml.transform;
  39
  40 import gnu.java.lang.CPStringBuilder;
  41
  42 import java.util.ArrayList;
  43 import java.util.Iterator;
  44 import java.util.LinkedList;
  45 import java.util.List;
  46 import javax.xml.namespace.QName;
  47 import javax.xml.transform.TransformerException;
  48 import org.w3c.dom.Node;
  49
  50 /**
  51  * A template node representing the XSL <code>call-template</code>
  52  * instruction.
  53  *
  54  * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
  55  */
  56 final class CallTemplateNode
  57   extends TemplateNode
  58 {
  59
  60   final QName name;
  61   final List withParams;
  62
  63   CallTemplateNode(QName name, List withParams)
  64   {
  65     this.name = name;
  66     this.withParams = withParams;
  67   }
  68
  69   TemplateNode clone(Stylesheet stylesheet)
  70   {
  71     int len = withParams.size();
  72     List withParams2 = new ArrayList(len);
  73     for (int i = 0; i < len; i++)
  74       withParams2.add(((WithParam) withParams.get(i)).clone(stylesheet));
  75     TemplateNode ret = new CallTemplateNode(name, withParams2);
  76     if (children != null)
  77       ret.children = children.clone(stylesheet);
  78     if (next != null)
  79       ret.next = next.clone(stylesheet);
  80     return ret;
  81   }
  82
  83   void doApply(Stylesheet stylesheet, QName mode,
  84                Node context, int pos, int len,
  85                Node parent, Node nextSibling)
  86     throws TransformerException
  87   {
  88     TemplateNode t = stylesheet.getTemplate(mode, name);
  89     if (t != null)
  90       {
  91         if (!withParams.isEmpty())
  92           {
  93             // compute the parameter values
  94             LinkedList values = new LinkedList();
  95             for (Iterator i = withParams.iterator(); i.hasNext(); )
  96               {
  97                 WithParam p = (WithParam) i.next();
  98                 if (t.hasParam(p.name)) // ignore parameters not specified
  99                   {
 100                     Object value = p.getValue(stylesheet, mode, context,
 101                                               pos, len);
 102                     Object[] pair = new Object[2];
 103                     pair[0] = p.name;
 104                     pair[1] = value;
 105                     values.add(pair);
 106                   }
 107               }
 108             // push the parameter context
 109             stylesheet.bindings.push(Bindings.WITH_PARAM);
 110             // set the parameters
 111             for (Iterator i = values.iterator(); i.hasNext(); )
 112               {
 113                 Object[] pair = (Object[]) i.next();
 114                 QName name = (QName) pair[0];
 115                 Object value = pair[1];
 116                 stylesheet.bindings.set(name, value, Bindings.WITH_PARAM);
 117                 if (stylesheet.debug)
 118                   System.err.println("with-param: " + name + " = " + value);
 119               }
 120           }
 121         t.apply(stylesheet, mode, context, pos, len,
 122                 parent, nextSibling);
 123         if (!withParams.isEmpty())
 124           {
 125             // pop the variable context
 126             stylesheet.bindings.pop(Bindings.WITH_PARAM);
 127           }
 128       }
 129     // call-template doesn't have processable children
 130     if (next != null)
 131         next.apply(stylesheet, mode,
 132                    context, pos, len,
 133                    parent, nextSibling);
 134   }
 135
 136   public boolean references(QName var)
 137   {
 138     for (Iterator i = withParams.iterator(); i.hasNext(); )
 139       {
 140         if (((WithParam) i.next()).references(var))
 141           return true;
 142       }
 143     return super.references(var);
 144   }
 145
 146   public String toString()
 147   {
 148     CPStringBuilder buf = new CPStringBuilder("call-template");
 149     buf.append('[');
 150     buf.append("name=");
 151     buf.append(name);
 152     buf.append(']');
 153     return buf.toString();
 154   }
 155
 156 }