ExprEnvironment


1   /*
2    * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3    *
4    * This file is part of Resin(R) Open Source
5    *
6    * Each copy or derived work must preserve the copyright notice and this
7    * notice unmodified.
8    *
9    * Resin Open Source is free software; you can redistribute it and/or modify
10   * it under the terms of the GNU General Public License as published by
11   * the Free Software Foundation; either version 2 of the License, or
12   * (at your option) any later version.
13   *
14   * Resin Open Source is distributed in the hope that it will be useful,
15   * but WITHOUT ANY WARRANTY; without even the implied warranty of
16   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17   * of NON-INFRINGEMENT.  See the GNU General Public License for more
18   * details.
19   *
20   * You should have received a copy of the GNU General Public License
21   * along with Resin Open Source; if not, write to the
22   *   Free SoftwareFoundation, Inc.
23   *   59 Temple Place, Suite 330
24   *   Boston, MA 02111-1307  USA
25   *
26   * @author Scott Ferguson
27   */
28  
29  package com.caucho.xpath;
30  
31  import com.caucho.xpath.expr.Var;
32  
33  import org.w3c.dom.Document  ;
34  import org.w3c.dom.Node  ;
35  
36  /**
37   * Adds variable environment.
38   */
39  public interface ExprEnvironment {
40    /**
41     * Returns the value associated with name.  
42     *
43     * <p><em>name must be interned</em>
44     */
45    public Var getVar(String   name);
46    
47    /**
48     * Returns the value associated with name.  
49     *
50     * <p><em>name must be interned</em>
51     */
52    public XPathFun getFunction(String   name);
53    
54    /**
55     * Sets the node context.
56     */
57    public Node   setContextNode(Node   node);
58    /**
59     * Returns the StylesheetEnv
60     */
61    public StylesheetEnv getStylesheetEnv();
62    /**
63     * Return context node from the XPath expression context.
64     */
65    Node   getContextNode();
66    
67    /**
68     * Returns the context position from the XPath expression context.
69     */
70    int getContextPosition();
71    
72    /**
73     * Returns the context size from the XPath expression context.
74     */
75    int getContextSize();
76    
77    /**
78     * Returns the current node from the XSLT context; the same
79     * as calling current() function from the XPath expression context.
80     */
81    Node   getCurrentNode();
82    
83    /**
84     * Returns a Document to be used for creating nodes.
85     */
86    Document   getOwnerDocument();
87    /**
88     * Returns an Object representing the value of the system property
89     * whose expanded-name has the specified namespace URI and local part.
90     */
91    Object   systemProperty(String   namespaceURI, String   localName);
92    /**
93     * Returns the string-value of the specified Node.
94     */
95    String   stringValue(Node   n);
96  }
97
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