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1 /*--
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2
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3 $Id: XML4JDOMAdapter.java,v 1.18 2007/11/10 05:28:59 jhunter Exp $
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4
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5 Copyright (C) 2000-2007 Jason Hunter & Brett McLaughlin.
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6 All rights reserved.
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7
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8 Redistribution and use in source and binary forms, with or without
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9 modification, are permitted provided that the following conditions
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10 are met:
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11
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12 1. Redistributions of source code must retain the above copyright
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13 notice, this list of conditions, and the following disclaimer.
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14
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15 2. Redistributions in binary form must reproduce the above copyright
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16 notice, this list of conditions, and the disclaimer that follows
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17 these conditions in the documentation and/or other materials
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18 provided with the distribution.
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19
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20 3. The name "JDOM" must not be used to endorse or promote products
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21 derived from this software without prior written permission. For
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22 written permission, please contact <request_AT_jdom_DOT_org>.
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23
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24 4. Products derived from this software may not be called "JDOM", nor
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25 may "JDOM" appear in their name, without prior written permission
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26 from the JDOM Project Management <request_AT_jdom_DOT_org>.
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27
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28 In addition, we request (but do not require) that you include in the
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29 end-user documentation provided with the redistribution and/or in the
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30 software itself an acknowledgement equivalent to the following:
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31 "This product includes software developed by the
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32 JDOM Project (http://www.jdom.org/)."
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33 Alternatively, the acknowledgment may be graphical using the logos
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34 available at http://www.jdom.org/images/logos.
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35
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36 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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37 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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38 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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39 DISCLAIMED. IN NO EVENT SHALL THE JDOM AUTHORS OR THE PROJECT
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40 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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41 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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42 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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43 USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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44 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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45 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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46 OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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47 SUCH DAMAGE.
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48
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49 This software consists of voluntary contributions made by many
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50 individuals on behalf of the JDOM Project and was originally
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51 created by Jason Hunter <jhunter_AT_jdom_DOT_org> and
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52 Brett McLaughlin <brett_AT_jdom_DOT_org>. For more information
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53 on the JDOM Project, please see <http://www.jdom.org/>.
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54
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55 */
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56
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57 package org.jdom.adapters;
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58
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59 import java.io.*;
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60 import java.lang.reflect.*;
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61
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62 import org.jdom.*;
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63 import org.jdom.input.*;
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64 import org.w3c.dom.Document;
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65 import org.xml.sax.*;
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66
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67 /**
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68 * An adapter for the IBM XML4J DOM parser.
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69 *
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70 * @version $Revision: 1.18 $, $Date: 2007/11/10 05:28:59 $
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71 * @author Brett McLaughlin
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72 * @author Jason Hunter
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73 */
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74 public class XML4JDOMAdapter extends AbstractDOMAdapter {
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75
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76 private static final String CVS_ID =
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77 "@(#) $RCSfile: XML4JDOMAdapter.java,v $ $Revision: 1.18 $ $Date: 2007/11/10 05:28:59 $ $Name: jdom_1_1_1 $";
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78
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79 /**
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80 * This creates a new <code>{@link Document}</code> from an
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81 * existing <code>InputStream</code> by letting a DOM
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82 * parser handle parsing using the supplied stream.
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83 *
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84 * @param in <code>InputStream</code> to parse.
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85 * @param validate <code>boolean</code> to indicate if validation should occur.
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86 * @return <code>Document</code> - instance ready for use.
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87 * @throws IOException when I/O error occurs.
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88 * @throws JDOMException when errors occur in parsing.
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89 */
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90 public Document getDocument(InputStream in, boolean validate)
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91 throws IOException, JDOMException {
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92
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93 try {
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94 /*
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95 * IBM XML4J actually uses the Xerces parser, so this is
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96 * all Xerces specific code.
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97 */
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98
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99 // Load the parser class
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100 Class parserClass = Class.forName("org.apache.xerces.parsers.DOMParser");
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101 Object parser = parserClass.newInstance();
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102
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103 // Set validation
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104 Method setFeature =
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105 parserClass.getMethod("setFeature",
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106 new Class[] {java.lang.String.class,
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107 boolean.class});
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108 setFeature.invoke(parser, new Object[] {"http://xml.org/sax/features/validation",
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109 new Boolean(validate)});
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110
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111 // Set namespaces
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112 setFeature.invoke(parser, new Object[] {"http://xml.org/sax/features/namespaces",
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113 new Boolean(false)});
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114
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115 // Set the error handler
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116 if (validate) {
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117 Method setErrorHandler =
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118 parserClass.getMethod("setErrorHandler",
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119 new Class[] {ErrorHandler.class});
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120 setErrorHandler.invoke(parser, new Object[] {new BuilderErrorHandler()});
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121 }
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122
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123 // Parse the document
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124 Method parse =
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125 parserClass.getMethod("parse",
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126 new Class[] {org.xml.sax.InputSource.class});
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127 parse.invoke(parser, new Object[]{new InputSource(in)});
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128
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129 // Get the Document object
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130 Method getDocument = parserClass.getMethod("getDocument", null);
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131 Document doc = (Document)getDocument.invoke(parser, null);
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132
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133 return doc;
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134 } catch (InvocationTargetException e) {
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135 Throwable targetException = e.getTargetException();
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136 if (targetException instanceof org.xml.sax.SAXParseException) {
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137 SAXParseException parseException = (SAXParseException)targetException;
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138 throw new JDOMException("Error on line " + parseException.getLineNumber() +
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139 " of XML document: " + parseException.getMessage(), parseException);
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140 } else if (targetException instanceof IOException) {
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141 IOException ioException = (IOException) targetException;
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142 throw ioException;
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143 } else {
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144 throw new JDOMException(targetException.getMessage(), targetException);
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145 }
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146 } catch (Exception e) {
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147 throw new JDOMException(e.getClass().getName() + ": " +
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148 e.getMessage(), e);
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149 }
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150 }
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151
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152 /**
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153 * This creates an empty <code>Document</code> object based
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154 * on a specific parser implementation.
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155 *
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156 * @return <code>Document</code> - created DOM Document.
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157 * @throws JDOMException when errors occur.
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158 */
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159 public Document createDocument() throws JDOMException {
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160 try {
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161 return
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162 (Document)Class.forName(
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163 "org.apache.xerces.dom.DocumentImpl")
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164 .newInstance();
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165
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166 } catch (Exception e) {
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167 throw new JDOMException(e.getClass().getName() + ": " +
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168 e.getMessage() + " while creating document", e);
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169 }
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170 }
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171 }
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