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 java.util.ArrayList;
  41 import java.util.Iterator;
  42 import java.util.LinkedList;
  43 import java.util.List;
  44 import javax.xml.namespace.QName;
  45 import javax.xml.transform.TransformerException;
  46 import org.w3c.dom.Node;
  47
  48 /**
  49  * A template node representing the XSL <code>call-template</code>
  50  * instruction.
  51  *
  52  * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
  53  */
  54 final class CallTemplateNode
  55   extends TemplateNode
  56 {
  57
  58   final QName name;
  59   final List withParams;
  60
  61   CallTemplateNode(QName name, List withParams)
  62   {
  63     this.name = name;
  64     this.withParams = withParams;
  65   }
  66
  67   TemplateNode clone(Stylesheet stylesheet)
  68   {
  69     int len = withParams.size();
  70     List withParams2 = new ArrayList(len);
  71     for (int i = 0; i < len; i++)
  72       withParams2.add(((WithParam) withParams.get(i)).clone(stylesheet));
  73     TemplateNode ret = new CallTemplateNode(name, withParams2);
  74     if (children != null)
  75       ret.children = children.clone(stylesheet);
  76     if (next != null)
  77       ret.next = next.clone(stylesheet);
  78     return ret;
  79   }
  80
  81   void doApply(Stylesheet stylesheet, QName mode,
  82                Node context, int pos, int len,
  83                Node parent, Node nextSibling)
  84     throws TransformerException
  85   {
  86     TemplateNode t = stylesheet.getTemplate(mode, name);
  87     if (t != null)
  88       {
  89         if (withParams != null)
  90           {
  91             // compute the parameter values
  92             LinkedList values = new LinkedList();
  93             for (Iterator i = withParams.iterator(); i.hasNext(); )
  94               {
  95                 WithParam p = (WithParam) i.next();
  96                 if (t.hasParam(p.name)) // ignore parameters not specified
  97                   {
  98                     Object value = p.getValue(stylesheet, mode, context,
  99                                               pos, len);
 100                     Object[] pair = new Object[2];
 101                     pair[0] = p.name;
 102                     pair[1] = value;
 103                     values.add(pair);
 104                   }
 105               }
 106             // push the parameter context
 107             stylesheet.bindings.push(Bindings.WITH_PARAM);
 108             // set the parameters
 109             for (Iterator i = values.iterator(); i.hasNext(); )
 110               {
 111                 Object[] pair = (Object[]) i.next();
 112                 QName name = (QName) pair[0];
 113                 Object value = pair[1];
 114                 stylesheet.bindings.set(name, value, Bindings.WITH_PARAM);
 115                 if (stylesheet.debug)
 116                   System.err.println("with-param: " + name + " = " + value);
 117               }
 118           }
 119         t.apply(stylesheet, mode, context, pos, len,
 120                 parent, nextSibling);
 121         if (withParams != null)
 122           {
 123             // pop the variable context
 124             stylesheet.bindings.pop(Bindings.WITH_PARAM);
 125           }
 126       }
 127     // call-template doesn't have processable children
 128     if (next != null)
 129         next.apply(stylesheet, mode,
 130                    context, pos, len,
 131                    parent, nextSibling);
 132   }
 133
 134   public boolean references(QName var)
 135   {
 136     if (withParams != null)
 137       {
 138         for (Iterator i = withParams.iterator(); i.hasNext(); )
 139           {
 140             if (((WithParam) i.next()).references(var))
 141               return true;
 142           }
 143       }
 144     return super.references(var);
 145   }
 146
 147   public String toString()
 148   {
 149     StringBuffer buf = new StringBuffer("call-template");
 150     buf.append('[');
 151     buf.append("name=");
 152     buf.append(name);
 153     buf.append(']');
 154     return buf.toString();
 155   }
 156
 157 }