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package net.sf.flock.parser;
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import java.net.URL;
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4
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import java.text.DateFormat;
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import java.text.SimpleDateFormat;
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6
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import java.util.Date;
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import java.util.Iterator;
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8
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import java.util.Locale;
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9
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10
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import org.apache.log4j.LogManager;
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import org.apache.log4j.Logger;
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12
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import org.jdom.Element;
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import org.jdom.Namespace;
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14
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15
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class ParserUtil {
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private final static Logger LOGGER = LogManager.getLogger(ParserUtil.class);
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private ParserUtil() {
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}
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21
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public static URL getURL(String toURL) {
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try {
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return new URL(toURL);
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} catch (java.net.MalformedURLException e) {
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LOGGER.warn("Invalid URL '" + toURL + "' given.");
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return null;
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}
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}
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public static Namespace getDefaultNS(Element element) {
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return getNamespace(element, "");
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}
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35
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public static Namespace getNamespace(Element element, String prefix) {
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Namespace ns = null;
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Iterator it = element.getAdditionalNamespaces().iterator();
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while (it.hasNext()) {
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Namespace curNS = (Namespace) it.next();
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40
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if (curNS.getPrefix().equals(prefix)) {
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ns = curNS;
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break;
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}
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}
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return ns;
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}
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48
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public static Namespace getNamespaceFromURI(Element element, String uri) {
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49
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Iterator it = element.getAdditionalNamespaces().iterator();
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50
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while (it.hasNext()) {
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Namespace curNS = (Namespace) it.next();
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if (curNS.getURI().equals(uri)) {
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return curNS;
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}
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}
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return null;
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57
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}
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58
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59
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/** @consider making dateformatters non-static, for thread-safety */
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60
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private final static DateFormat[] DATE_FORMATTERS = {
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61
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// "2002-09-19T02:51:16-05:00"
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new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:sszzzzz", Locale.US),
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63
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64
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// "2002-12-10T15:46-06:00"
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new SimpleDateFormat("yyyy-MM-dd'T'HH:mmzzzzz", Locale.US),
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66
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67
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// "Tue, 29 Oct 2002 21:35:25 GMT"
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68
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new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzzzz", Locale.US),
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69
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// "Tue 29 Oct 2002 21:35:25 GMT"
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new SimpleDateFormat("EEE dd MMM yyyy HH:mm:ss zzzzz", Locale.US),
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// 1/7/2003
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new SimpleDateFormat("MM/dd/yyyy", Locale.US),
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// "2002-12-07"
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new SimpleDateFormat("yyyy-MM-dd", Locale.US)
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};
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78
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79
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public static Date parseDate(Element dateElement) {
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80
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if (dateElement == null) {
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81
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return null;
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}
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83
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84
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String date = dateElement.getTextTrim();
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85
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for (int i = 0; i < DATE_FORMATTERS.length; i++) {
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86
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try {
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87
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return DATE_FORMATTERS[i].parse(date);
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88
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} catch (java.text.ParseException e) {
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89
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}
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90
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}
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91
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92
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LOGGER.warn("Unable to parse date: '" + date + "'");
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93
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return null;
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94
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}
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95
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96
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97
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public static String elementValue(Element element, int maxlen) {
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98
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if (element == null)
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99
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return "null";
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100
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101
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String value = element.getTextTrim();
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102
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if (value.length()>maxlen) {
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103
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return value.substring(0,maxlen)+"...";
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104
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} else {
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105
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return value;
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106
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}
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107
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}
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108
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109
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}
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110
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