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    1   /*
    2    * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/pattern/NodeTypeTest.java,v 1.7 2005/06/28 13:44:44 elharo Exp $
    3    * $Revision: 1.7 $
    4    * $Date: 2005/06/28 13:44:44 $
    5    *
    6    * ====================================================================
    7    *
    8    * Copyright (C) 2000-2002 bob mcwhirter & James Strachan.
    9    * All rights reserved.
    10   *
    11   * Redistribution and use in source and binary forms, with or without
    12   * modification, are permitted provided that the following conditions
    13   * are met:
    14   *
    15   * 1. Redistributions of source code must retain the above copyright
    16   *    notice, this list of conditions, and the following disclaimer.
    17   *
    18   * 2. Redistributions in binary form must reproduce the above copyright
    19   *    notice, this list of conditions, and the disclaimer that follows
    20   *    these conditions in the documentation and/or other materials
    21   *    provided with the distribution.
    22   *
    23   * 3. The name "Jaxen" must not be used to endorse or promote products
    24   *    derived from this software without prior written permission.  For
    25   *    written permission, please contact license@jaxen.org.
    26   *
    27   * 4. Products derived from this software may not be called "Jaxen", nor
    28   *    may "Jaxen" appear in their name, without prior written permission
    29   *    from the Jaxen Project Management (pm@jaxen.org).
    30   *
    31   * In addition, we request (but do not require) that you include in the
    32   * end-user documentation provided with the redistribution and/or in the
    33   * software itself an acknowledgement equivalent to the following:
    34   *     "This product includes software developed by the
    35   *      Jaxen Project <http://www.jaxen.org/>."
    36   * Alternatively, the acknowledgment may be graphical using the logos
    37   * available at http://www.jaxen.org/
    38   *
    39   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
    40   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
    41   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    42   * DISCLAIMED.  IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT
    43   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    44   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    45   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
    46   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
    47   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
    48   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
    49   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    50   * SUCH DAMAGE.
    51   *
    52   * ====================================================================
    53   * This software consists of voluntary contributions made by many
    54   * individuals on behalf of the Jaxen Project and was originally
    55   * created by bob mcwhirter <bob@werken.com> and
    56   * James Strachan <jstrachan@apache.org>.  For more information on the
    57   * Jaxen Project, please see <http://www.jaxen.org/>.
    58   *
    59   * $Id: NodeTypeTest.java,v 1.7 2005/06/28 13:44:44 elharo Exp $
    60   */
    61
    62  package org.jaxen.pattern;
    63
    64  import org.jaxen.Context;
    65
    66  /*** <p><code>NodeTypeTest</code> matches if the node is of a certain type
    67    * such as element, attribute, comment, text, processing instruction and so forth.</p>
    68    *
    69    * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
    70    * @version $Revision: 1.7 $
    71    */
    72  public class NodeTypeTest extends NodeTest {
    73
    74      public static final NodeTypeTest DOCUMENT_TEST
    75          = new NodeTypeTest( DOCUMENT_NODE );
    76
    77      public static final NodeTypeTest ELEMENT_TEST
    78          = new NodeTypeTest( ELEMENT_NODE );
    79
    80      public static final NodeTypeTest ATTRIBUTE_TEST
    81          = new NodeTypeTest( ATTRIBUTE_NODE );
    82
    83      public static final NodeTypeTest COMMENT_TEST
    84          = new NodeTypeTest( COMMENT_NODE );
    85
    86      public static final NodeTypeTest TEXT_TEST
    87          = new NodeTypeTest( TEXT_NODE );
    88
    89      public static final NodeTypeTest PROCESSING_INSTRUCTION_TEST
    90          = new NodeTypeTest( PROCESSING_INSTRUCTION_NODE );
    91
    92      public static final NodeTypeTest NAMESPACE_TEST
    93          = new NodeTypeTest( NAMESPACE_NODE );
    94
    95
    96      private short nodeType;
    97
    98      public NodeTypeTest(short nodeType)
    99      {
    100         this.nodeType = nodeType;
    101     }
    102
    103     /*** @return true if the pattern matches the given node
    104       */
    105     public boolean matches( Object node, Context context )
    106     {
    107         return nodeType == context.getNavigator().getNodeType( node );
    108     }
    109
    110     public double getPriority()
    111     {
    112         return -0.5;
    113     }
    114
    115
    116     public short getMatchType()
    117     {
    118         return nodeType;
    119     }
    120
    121     public String getText()
    122     {
    123         switch (nodeType)
    124         {
    125             case ELEMENT_NODE:
    126                 return "child()";
    127             case ATTRIBUTE_NODE:
    128                 return "@*";
    129             case NAMESPACE_NODE:
    130                 return "namespace()";
    131             case DOCUMENT_NODE:
    132                 return "/";
    133             case COMMENT_NODE:
    134                 return "comment()";
    135             case TEXT_NODE:
    136                 return "text()";
    137             case PROCESSING_INSTRUCTION_NODE:
    138                 return "processing-instruction()";
    139         }
    140         return "";
    141     }
    142
    143     public String toString()
    144     {
    145         return super.toString() + "[ type: " + nodeType + " ]";
    146     }
    147 }