1 /*
2 * Copyright (c) 2003, Henri Yandell
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or
6 * without modification, are permitted provided that the
7 * following conditions are met:
8 *
9 * + Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * + Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * + Neither the name of XmlWriter nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32 package com.generationjava.io.xml;
33
34 import java.io.IOException;
35
36 import java.text.NumberFormat;
37 import java.text.DateFormat;
38 import java.util.Date;
39
40
41 /***
42 * Formats Numbers and Dates on the fly.
43 */
44 public class FormattingXmlWriter extends DelegatingXmlWriter {
45
46 private DateFormat dateFormat;
47 private NumberFormat numberFormat;
48
49 public FormattingXmlWriter(XmlWriter writer) {
50 super(writer);
51 }
52
53
54 /***
55 * When a Number object is written, it will use this to
56 * format it. If the argument is null then it uses .toString.
57 */
58 public FormattingXmlWriter setNumberFormat(NumberFormat format) {
59 this.numberFormat = format;
60 return this;
61 }
62
63 /***
64 * When a java.util.Date object is written, it will use this to
65 * format it. If the argument is null then it uses .toString.
66 */
67 public FormattingXmlWriter setDateFormat(DateFormat format) {
68 this.dateFormat = format;
69 return this;
70 }
71
72 public XmlWriter writeEntityWithText(String name, Object text) throws IOException {
73 return super.writeEntityWithText(name, format(text));
74 }
75
76 public XmlWriter writeText(Object text) throws IOException {
77 return super.writeText(format(text));
78 }
79
80 public XmlWriter writeAttribute(String name, Object value) throws IOException {
81 return super.writeAttribute(name, format(value));
82 }
83
84 protected String format(Object unknown) {
85 /// WHICH STRATEGY TO USE FOR NULL???
86 if(unknown == null) {
87 return null;
88 }
89
90 if(unknown instanceof String) {
91 return (String)unknown;
92 }
93
94 if(unknown instanceof Date) {
95 if(dateFormat == null) {
96 return unknown.toString();
97 } else {
98 return dateFormat.format((Date)unknown);
99 }
100 } else
101 if(unknown instanceof Number) {
102 if(numberFormat == null) {
103 return unknown.toString();
104 } else {
105 return numberFormat.format((Number)unknown);
106 }
107 }
108
109 return unknown.toString();
110 }
111
112 }