1 | /* WRS 2.0 |
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2 | * Copyright (C) 2009 Anton Patrushev |
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3 | * |
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4 | * This program is free software; you can redistribute it and/or modify |
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5 | * it under the terms of the GNU General Public License as published by |
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6 | * the Free Software Foundation; either version 3 of the License, or |
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7 | * (at your option) any later version. |
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8 | * |
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9 | * This program is distributed in the hope that it will be useful, |
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10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 | * GNU General Public License for more details. |
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13 | * |
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14 | * You should have received a copy of the GNU General Public License |
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15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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16 | */ |
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17 | |
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18 | package util; |
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19 | |
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20 | import java.io.BufferedReader; |
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21 | import java.io.File; |
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22 | import java.io.FileReader; |
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23 | import java.io.IOException; |
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24 | import java.text.DecimalFormat; |
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25 | |
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26 | import org.w3c.dom.Document; |
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27 | |
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28 | import javax.xml.bind.JAXBContext; |
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29 | import javax.xml.bind.JAXBException; |
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30 | import javax.xml.bind.Unmarshaller; |
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31 | import javax.xml.parsers.DocumentBuilder; |
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32 | import javax.xml.parsers.DocumentBuilderFactory; |
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33 | import javax.xml.parsers.ParserConfigurationException; |
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34 | import javax.xml.transform.Source; |
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35 | import javax.xml.transform.stream.StreamSource; |
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36 | import javax.xml.validation.Schema; |
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37 | import javax.xml.validation.SchemaFactory; |
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38 | import javax.xml.validation.Validator; |
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39 | |
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40 | import org.xml.sax.SAXException; |
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41 | |
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42 | public class IOHelper |
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43 | { |
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44 | |
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45 | static final String W3C_XML_SCHEMA = "http://www.w3.org/2001/XMLSchema"; |
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46 | public static final DecimalFormat FORMATTER = new DecimalFormat("##########0.######"); |
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47 | |
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48 | @SuppressWarnings("unchecked") |
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49 | public static <T> T readConfig(Class<T> docClass, String fileName) |
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50 | throws SAXException, IOException, ParserConfigurationException, |
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51 | JAXBException |
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52 | { |
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53 | T conf = null; |
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54 | |
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55 | if (validateXML(fileName)) |
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56 | { |
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57 | DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory |
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58 | .newInstance(); |
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59 | DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder(); |
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60 | Document doc = docBuilder.parse(new File(fileName)); |
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61 | |
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62 | // normalize text representation |
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63 | doc.getDocumentElement().normalize(); |
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64 | |
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65 | JAXBContext jaxbContext = JAXBContext.newInstance(docClass |
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66 | .getPackage().getName()); |
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67 | Unmarshaller u = jaxbContext.createUnmarshaller(); |
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68 | conf = (T) u.unmarshal(new File(fileName)); |
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69 | |
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70 | } |
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71 | |
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72 | return conf; |
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73 | } |
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74 | |
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75 | public static String readFile(String url) throws IOException |
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76 | { |
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77 | StringBuffer fileData = new StringBuffer(1000); |
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78 | BufferedReader reader = new BufferedReader(new FileReader(url)); |
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79 | char[] buf = new char[1024]; |
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80 | int numRead = 0; |
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81 | while ((numRead = reader.read(buf)) != -1) |
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82 | { |
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83 | fileData.append(buf, 0, numRead); |
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84 | } |
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85 | reader.close(); |
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86 | return fileData.toString(); |
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87 | |
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88 | } |
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89 | |
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90 | /** |
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91 | * Validates XML document against a document-specified schema |
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92 | * |
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93 | * @param fileName |
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94 | * XML document file name |
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95 | * @return true if XML document is valid |
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96 | * @throws SAXException |
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97 | * @throws IOException |
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98 | */ |
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99 | private static boolean validateXML(String fileName) throws SAXException, |
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100 | IOException |
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101 | { |
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102 | boolean isValid = false; |
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103 | |
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104 | SchemaFactory factory = SchemaFactory.newInstance(W3C_XML_SCHEMA); |
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105 | Schema schema = factory.newSchema(); |
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106 | |
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107 | Validator validator = schema.newValidator(); |
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108 | Source source = new StreamSource(fileName); |
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109 | |
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110 | try |
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111 | { |
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112 | validator.validate(source); |
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113 | isValid = true; |
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114 | System.out.println(fileName + " is valid."); |
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115 | } |
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116 | catch (SAXException ex) |
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117 | { |
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118 | System.out.println(fileName + " is not valid because "); |
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119 | System.out.println(ex.getMessage()); |
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120 | } |
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121 | |
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122 | return isValid; |
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123 | } |
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124 | } |
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