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Java > Open Source Codes > net > sf > jga > fn > string > StringFunctors


1 // ============================================================================
2 // $Id: StringFunctors.java,v 1.2 2006/11/30 05:05:23 davidahall Exp $
3 // Copyright (c) 2006 David A. Hall
4 // ============================================================================
5 // The contents of this file are subject to the Common Development and
6 // Distribution License (CDDL), Version 1.0 (the License); you may not use this
7 // file except in compliance with the License. You should have received a copy
8 // of the the License along with this file: if not, a copy of the License is
9 // available from Sun Microsystems, Inc.
10 //
11 // http://www.sun.com/cddl/cddl.html
12 //
13 // From time to time, the license steward (initially Sun Microsystems, Inc.) may
14 // publish revised and/or new versions of the License. You may not use,
15 // distribute, or otherwise make this file available under subsequent versions
16 // of the License.
17 //
18 // Alternatively, the contents of this file may be used under the terms of the
19 // GNU Lesser General Public License Version 2.1 or later (the "LGPL"), in which
20 // case the provisions of the LGPL are applicable instead of those above. If you
21 // wish to allow use of your version of this file only under the terms of the
22 // LGPL, and not to allow others to use your version of this file under the
23 // terms of the CDDL, indicate your decision by deleting the provisions above
24 // and replace them with the notice and other provisions required by the LGPL.
25 // If you do not delete the provisions above, a recipient may use your version
26 // of this file under the terms of either the CDDL or the LGPL.
27 //
28 // This library is distributed in the hope that it will be useful,
29 // but WITHOUT ANY WARRANTY; without even the implied warranty of
30 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
31 // ============================================================================
32
33 package net.sf.jga.fn.string;
34
35 import java.text.DateFormat JavaDoc;
36 import java.text.Format JavaDoc;
37 import java.text.MessageFormat JavaDoc;
38 import java.text.NumberFormat JavaDoc;
39 import java.util.Date JavaDoc;
40 import java.util.regex.Pattern JavaDoc;
41 import net.sf.jga.fn.UnaryFunctor;
42
43 /**
44  * Static factory methods for the functors in the String package.
45  * <p>
46  * Copyright &copy; 2006 David A. Hall
47  * @author <a HREF="mailto:davidahall@users.sf.net">David A. Hall</a>
48  */
49
50 public final class StringFunctors {
51     /**
52      * Returns a functor that presents its argument in String form using the argument's
53      * toString() method.
54      */
55     static public <T> UnaryFunctor<T,String JavaDoc> defaultFormat() {
56         return new DefaultFormat<T>();
57     }
58
59
60     /**
61      * Returns a functor that presents its argument in String form using the given format
62      */
63     static public UnaryFunctor<Object JavaDoc[],String JavaDoc> formatValue(MessageFormat JavaDoc format) {
64         return new FormatValue<Object JavaDoc[]>(format);
65     }
66
67     
68     /**
69      * Returns a functor that presents its argument in String form using the given format
70      */
71     static public <T extends Date JavaDoc> UnaryFunctor<T,String JavaDoc> formatValue(DateFormat JavaDoc format) {
72         return new FormatValue<T>(format);
73     }
74
75     
76     /**
77      * Returns a functor that presents its argument in String form using the given format
78      */
79     static public <T extends Number JavaDoc> UnaryFunctor<T,String JavaDoc> formatValue(NumberFormat JavaDoc format) {
80         return new FormatValue<T>(format);
81     }
82
83     
84     /**
85      * Returns a functor that matches its String argument against the given regex
86      */
87     static public UnaryFunctor<String JavaDoc,Boolean JavaDoc> match(String JavaDoc regex) {
88         return new Match(regex);
89     }
90
91     
92     /**
93      * Returns a functor that matches its String argument against the given pattern
94      */
95     static public UnaryFunctor<String JavaDoc,Boolean JavaDoc> match(Pattern JavaDoc pattern) {
96         return new Match(pattern);
97     }
98
99     
100     /**
101      * Returns a functor that parses its argument using the given format and returns an object
102      * of the given class.
103      */
104     static public <R> UnaryFunctor<String JavaDoc,R>
105     parseFormat(Format JavaDoc format, UnaryFunctor<Object JavaDoc,R> converter)
106     {
107          return new ParseFormat<R>(format, converter);
108     }
109
110     
111     /**
112      * Returns a functor that parses its argument using the given format and returns an object
113      * of the given class.
114      */
115     static public <R extends Date JavaDoc> UnaryFunctor<String JavaDoc,R>
116     parseFormat(Class JavaDoc<R> dateClass, DateFormat JavaDoc format)
117     {
118         return new ParseFormat.Date<R>(dateClass, format);
119     }
120
121     
122     /**
123      * Returns a functor that parses its argument using the given format and returns an object
124      * of the given class.
125      */
126     static public <R extends Number JavaDoc> UnaryFunctor<String JavaDoc,R>
127     parseFormat(Class JavaDoc<R> numClass,NumberFormat JavaDoc format)
128     {
129         return new ParseFormat.Number<R>(numClass, format);
130     }
131 }
132
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