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1 package de.mpiwg.anteater.xml.impl;
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2
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3 import java.io.File;
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4 import java.io.FileNotFoundException;
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5 import java.io.FileOutputStream;
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6 import java.io.IOException;
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7 import java.io.InputStream;
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8 import java.io.OutputStreamWriter;
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9 import java.io.StringReader;
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10 import java.nio.charset.Charset;
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11 import java.util.ArrayList;
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12 import java.util.List;
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13
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14 import org.jdom2.Content;
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15 import org.jdom2.Document;
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16 import org.jdom2.Element;
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17 import org.jdom2.JDOMException;
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18 import org.jdom2.Namespace;
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19 import org.jdom2.Text;
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20 import org.jdom2.filter.ElementFilter;
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21 import org.jdom2.input.SAXBuilder;
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22 import org.jdom2.output.Format;
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23 import org.jdom2.output.XMLOutputter;
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24 import org.jdom2.xpath.XPathExpression;
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25 import org.jdom2.xpath.XPathFactory;
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26
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27 import de.mpiwg.anteater.xml.IXMLParser;
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28
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29 public class JDOMParser implements IXMLParser {
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30
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31 private Document doc;
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32
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33 public JDOMParser(String pathOrContent, boolean loadFromFile) {
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34 if (loadFromFile) {
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35 init(pathOrContent);
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36 } else {
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37 try {
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38 SAXBuilder builder = new SAXBuilder();
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39 doc = builder.build(new StringReader(pathOrContent));
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40 } catch (JDOMException e) {
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41 // TODO Auto-generated catch block
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42 e.printStackTrace();
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43 } catch (IOException e) {
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44 // TODO Auto-generated catch block
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45 e.printStackTrace();
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46 }
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47 }
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48
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49 }
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50
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51 public JDOMParser(InputStream stream) {
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52 init(stream);
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53 }
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54
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55 public JDOMParser() {
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56 doc = new Document();
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57 }
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58
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59 protected void init(String filepath) {
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60 SAXBuilder builder = new SAXBuilder();
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61 File file = new File(filepath);
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62 if (file.exists()) {
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63 try {
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64 doc = builder.build(file);
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65 } catch (JDOMException e) {
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66 // TODO Auto-generated catch block
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67 e.printStackTrace();
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68 } catch (IOException e) {
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69 // TODO Auto-generated catch block
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70 e.printStackTrace();
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71 }
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72 }
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73 }
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74
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75 protected void init(InputStream stream) {
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76 SAXBuilder builder = new SAXBuilder();
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77 try {
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78 doc = builder.build(stream);
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79 } catch (JDOMException e) {
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80 // TODO Auto-generated catch block
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81 e.printStackTrace();
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82 } catch (IOException e) {
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83 // TODO Auto-generated catch block
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84 e.printStackTrace();
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85 }
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86 }
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87
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88 @Override
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89 public Element getRoot() {
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90 return doc.getRootElement();
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91 }
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92
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93 @Override
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94 public List<Element> executeXPath(String xpath, String defaultNSPrefix) {
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95 if (doc == null)
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96 return null;
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97
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98 XPathFactory factory = XPathFactory.instance();
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99 // get namespaces but remove empty prefix to prevent xpath exception
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100 List<Namespace> namespaces = doc.getRootElement()
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101 .getNamespacesInScope();
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102 List<Namespace> finalNamespaces = new ArrayList<Namespace>();
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103 for (Namespace ns : namespaces) {
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104 if (!ns.getPrefix().isEmpty())
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105 finalNamespaces.add(ns);
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106 else if (!ns.getURI().trim().isEmpty() && defaultNSPrefix != null && !defaultNSPrefix.trim().isEmpty()) {
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107 finalNamespaces.add(Namespace.getNamespace(defaultNSPrefix, ns.getURI()));
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108 }
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109 }
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110 List<Element> results;
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111 // evaluate xpath
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112 XPathExpression<Element> expression = factory.compile(xpath,
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113 new ElementFilter(), null, finalNamespaces);
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114 results = expression.evaluate(doc.getRootElement());
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115
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116 return results;
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117 }
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118
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119 protected String stripText(Element node) {
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120 StringBuffer text = new StringBuffer();
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121 stripTextRecursivie(node, text);
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122 return text.toString().trim();
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123 }
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124
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125 protected void stripTextRecursivie(Element node, StringBuffer text) {
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126 for (Content child : node.getContent()) {
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127 if (child instanceof Text) {
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128 text.append(((Text) child).getText() != null ? ((Text) child)
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129 .getTextNormalize() + " " : "");
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130 } else if (child instanceof Element) {
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131 stripTextRecursivie((Element) child, text);
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132 }
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133 }
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134 }
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135
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136 public boolean save(String filepath, boolean prettyprint) {
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137 XMLOutputter out = null;
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138 if (prettyprint)
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139 out = new XMLOutputter(Format.getPrettyFormat());
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140 else
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141 out = new XMLOutputter();
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142 //FileWriter writer;
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143 FileOutputStream stream;
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144 try {
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145 stream = new FileOutputStream(new File(filepath));
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146 } catch (FileNotFoundException e1) {
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147 // TODO Auto-generated catch block
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148 e1.printStackTrace();
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149 return false;
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150 }
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151 OutputStreamWriter osWriter = new OutputStreamWriter(stream, Charset.forName("UTF-8"));
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152 try {
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153 //writer = new FileWriter(filepath);
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154 out.output(doc, osWriter);
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155 osWriter.flush();
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156 osWriter.close();
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157 } catch (IOException e) {
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158 e.printStackTrace();
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159 return false;
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160 }
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161 return true;
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162 }
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163 }
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