Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||
FunctionContext |
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| 1.0;1 |
1 | /* |
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2 | * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/FunctionContext.java,v 1.9 2005/06/28 13:44:44 elharo Exp $ |
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3 | * $Revision: 1.9 $ |
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4 | * $Date: 2005/06/28 13:44:44 $ |
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5 | * |
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6 | * ==================================================================== |
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7 | * |
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8 | * Copyright (C) 2000-2002 bob mcwhirter & James Strachan. |
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9 | * All rights reserved. |
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10 | * |
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11 | * Redistribution and use in source and binary forms, with or without |
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12 | * modification, are permitted provided that the following conditions |
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13 | * are met: |
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14 | * |
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15 | * 1. Redistributions of source code must retain the above copyright |
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16 | * notice, this list of conditions, and the following disclaimer. |
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17 | * |
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18 | * 2. Redistributions in binary form must reproduce the above copyright |
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19 | * notice, this list of conditions, and the disclaimer that follows |
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20 | * these conditions in the documentation and/or other materials |
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21 | * provided with the distribution. |
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22 | * |
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23 | * 3. The name "Jaxen" must not be used to endorse or promote products |
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24 | * derived from this software without prior written permission. For |
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25 | * written permission, please contact license@jaxen.org. |
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26 | * |
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27 | * 4. Products derived from this software may not be called "Jaxen", nor |
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28 | * may "Jaxen" appear in their name, without prior written permission |
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29 | * from the Jaxen Project Management (pm@jaxen.org). |
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30 | * |
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31 | * In addition, we request (but do not require) that you include in the |
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32 | * end-user documentation provided with the redistribution and/or in the |
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33 | * software itself an acknowledgement equivalent to the following: |
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34 | * "This product includes software developed by the |
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35 | * Jaxen Project <http://www.jaxen.org/>." |
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36 | * Alternatively, the acknowledgment may be graphical using the logos |
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37 | * available at http://www.jaxen.org/ |
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38 | * |
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39 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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40 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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41 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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42 | * DISCLAIMED. IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT |
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43 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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45 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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46 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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47 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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48 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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49 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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50 | * SUCH DAMAGE. |
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51 | * |
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52 | * ==================================================================== |
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53 | * This software consists of voluntary contributions made by many |
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54 | * individuals on behalf of the Jaxen Project and was originally |
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55 | * created by bob mcwhirter <bob@werken.com> and |
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56 | * James Strachan <jstrachan@apache.org>. For more information on the |
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57 | * Jaxen Project, please see <http://www.jaxen.org/>. |
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58 | * |
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59 | * $Id: FunctionContext.java,v 1.9 2005/06/28 13:44:44 elharo Exp $ |
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60 | */ |
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61 | ||
62 | ||
63 | package org.jaxen; |
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64 | ||
65 | /** Implemented by classes that know how to resolve XPath function names and |
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66 | * namespaces to implementations of these functions. |
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67 | * |
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68 | * <p> |
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69 | * By using a custom <code>FunctionContext</code>, new or different |
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70 | * functions may be installed and available to XPath expression writers. |
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71 | * </p> |
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72 | * |
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73 | * @see XPathFunctionContext |
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74 | * |
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75 | * @author <a href="mailto:bob@werken.com">bob mcwhirter</a> |
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76 | */ |
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77 | public interface FunctionContext |
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78 | { |
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79 | /** An implementation should return a <code>Function</code> implementation object |
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80 | * based on the namespace URI and local name of the function-call |
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81 | * expression. |
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82 | * |
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83 | * <p> |
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84 | * It must not use the prefix parameter to select an implementation, |
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85 | * because a prefix could be bound to any namespace; the prefix parameter |
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86 | * could be used in debugging output or other generated information. |
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87 | * The prefix may otherwise be completely ignored. |
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88 | * </p> |
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89 | * |
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90 | * @param namespaceURI the namespace URI to which the prefix parameter |
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91 | * is bound in the XPath expression. If the function |
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92 | * call expression had no prefix, the namespace URI |
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93 | * is <code>null</code>. |
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94 | * @param prefix the prefix that was used in the function call |
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95 | * expression |
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96 | * @param localName the local name of the function-call expression. |
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97 | * If there is no prefix, then this is the whole |
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98 | * name of the function. |
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99 | * |
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100 | * @return a Function implementation object. |
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101 | * @throws UnresolvableException when the function cannot be resolved |
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102 | */ |
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103 | Function getFunction( String namespaceURI, |
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104 | String prefix, |
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105 | String localName ) throws UnresolvableException; |
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106 | } |