libjava/classpath/gnu/xml/libxmlj/dom/GnomeXPathResult.java

   1 /* GnomeXPathResult.java -
   2    Copyright (C) 2004 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.libxmlj.dom;
  39
  40 import org.w3c.dom.DOMException;
  41 import org.w3c.dom.Node;
  42 import org.w3c.dom.xpath.XPathException;
  43 import org.w3c.dom.xpath.XPathResult;
  44
  45 /**
  46  * An XPath result object implemented in libxml2.
  47  *
  48  * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
  49  */
  50 class GnomeXPathResult
  51 implements XPathResult
  52 {
  53
  54   /**
  55    * xmlXPathObjectPtr
  56    */
  57   final Object obj;
  58
  59   GnomeXPathResult (Object obj)
  60   {
  61     this.obj = obj;
  62   }
  63
  64   protected void finalize ()
  65   {
  66     free (obj);
  67   }
  68
  69   private native void free (Object obj);
  70
  71   public native short getResultType ();
  72
  73   public native double getNumberValue ()
  74     throws XPathException;
  75
  76   public native String getStringValue ()
  77     throws XPathException;
  78
  79   public native boolean getBooleanValue ()
  80     throws XPathException;
  81
  82   public native Node getSingleNodeValue ()
  83     throws XPathException;
  84
  85   public native boolean getInvalidIteratorState();
  86
  87   public native int getSnapshotLength ()
  88     throws XPathException;
  89
  90   public native Node iterateNext ()
  91     throws XPathException, DOMException;
  92
  93   public native Node snapshotItem (int index)
  94     throws XPathException;
  95
  96   public String toString ()
  97   {
  98     short type = getResultType ();
  99     switch (type)
 100       {
 101       case STRING_TYPE:
 102         return getStringValue ();
 103       case NUMBER_TYPE:
 104         return Double.toString (getNumberValue ());
 105       case BOOLEAN_TYPE:
 106         return Boolean.valueOf (getBooleanValue ()).toString ();
 107       case UNORDERED_NODE_SNAPSHOT_TYPE:
 108         int len = getSnapshotLength ();
 109         switch (len) {
 110         case 0:
 111           return "[no matches]";
 112         case 1:
 113           return getSingleNodeValue ().toString ();
 114         default:
 115           StringBuffer buffer = new StringBuffer ();
 116           for (int i = 0; i < len; i++)
 117             {
 118               if (i > 0)
 119                 {
 120                   buffer.append (',');
 121                 }
 122               buffer.append (snapshotItem (i));
 123             }
 124           return buffer.toString ();
 125         }
 126       default:
 127         return getClass ().getName () + "[type=" + type + ",length=" +
 128           getSnapshotLength () + ']';
 129       }
 130   }
 131
 132 }