/** {@inheritDoc } */
@Override
protected NavigationLinks retrieveNavigationInfo(final String entitySetName, final InputStream is)
throws Exception {
final NavigationLinks links = new NavigationLinks();
final XMLEventReader reader = getEventReader(is);
try {
final List<Map.Entry<String, String>> filter = new ArrayList<Map.Entry<String, String>>();
filter.add(
new AbstractMap.SimpleEntry<String, String>("type", "application/atom+xml;type=entry"));
filter.add(
new AbstractMap.SimpleEntry<String, String>("type", "application/atom+xml;type=feed"));
int startDepth = 0;
while (true) {
// a. search for link with type attribute equals to "application/atom+xml;type=entry/feed"
final Map.Entry<Integer, XMLElement> linkInfo =
extractElement(
reader,
null,
Collections.<String>singletonList(Constants.get(ConstantKey.LINK)),
filter,
true,
startDepth,
2,
2);
final XMLElement link = linkInfo.getValue();
startDepth = linkInfo.getKey();
final String title = link.getStart().getAttributeByName(new QName("title")).getValue();
final Attribute hrefAttr = link.getStart().getAttributeByName(new QName("href"));
final String href = hrefAttr == null ? null : hrefAttr.getValue();
try {
final XMLElement inlineElement =
extractElement(
link.getContentReader(),
null,
Collections.<String>singletonList(Constants.get(ConstantKey.INLINE)),
0,
-1,
-1)
.getValue();
final XMLEventReader inlineReader = inlineElement.getContentReader();
try {
while (true) {
final XMLElement entry =
extractElement(
inlineReader, null, Collections.<String>singletonList("entry"), 0, -1, -1)
.getValue();
links.addInlines(title, entry.toStream());
}
} catch (Exception e) {
// Reached the end of document
}
inlineReader.close();
} catch (Exception ignore) {
// inline element not found (inlines are not mondatory).
if (StringUtils.isNotBlank(href) && ENTITY_URI_PATTERN.matcher(href).matches()) {
links.addLinks(title, href.substring(href.lastIndexOf('/') + 1));
}
}
}
} catch (Exception ignore) {
// ignore
} finally {
reader.close();
}
return links;
}
@Override
public InputStream readEntities(
final List<String> links, final String linkName, final String next, final boolean forceFeed)
throws Exception {
if (links.isEmpty()) {
throw new NotFoundException();
}
final Charset encoding = Charset.forName("UTF-8");
final ByteArrayOutputStream bos = new ByteArrayOutputStream();
final OutputStreamWriter writer = new OutputStreamWriter(bos, encoding);
writer.write("<?xml version=\"1.0\" encoding=\"utf-8\"?>".toCharArray());
if (forceFeed || links.size() > 1) {
// build a feed
writer.write(
("<feed xml:base=\""
+ Constants.get(ConstantKey.DEFAULT_SERVICE_URL)
+ "\" "
+ "xmlns=\"http://www.w3.org/2005/Atom\" "
+ "xmlns:d=\"http://schemas.microsoft.com/ado/2007/08/dataservices\" "
+ "xmlns:m=\"http://schemas.microsoft.com/ado/2007/08/dataservices/metadata\">")
.toCharArray());
writer.write(
("<id>"
+ Constants.get(ConstantKey.DEFAULT_SERVICE_URL)
+ "entityset(entityid)/"
+ linkName
+ "</id>")
.toCharArray());
writer.write(("<title type=\"text\">" + linkName + "</title>").toCharArray());
writer.write("<updated>2014-03-03T13:40:49Z</updated>".toCharArray());
writer.write(
("<link rel=\"self\" title=\"" + linkName + "\" href=\"" + linkName + "\" />")
.toCharArray());
}
for (String link : links) {
try {
final Map.Entry<String, String> uri = Commons.parseEntityURI(link);
final XMLElement entry =
extractElement(
getEventReader(
readEntity(uri.getKey(), uri.getValue(), Accept.ATOM).getValue()),
null,
Collections.<String>singletonList("entry"),
0,
1,
1)
.getValue();
IOUtils.copy(entry.toStream(), writer, encoding);
} catch (Exception e) {
// log and ignore link
LOG.warn("Error parsing uri {}", link, e);
}
}
if (forceFeed || links.size() > 1) {
if (StringUtils.isNotBlank(next)) {
writer.write(String.format("<link rel=\"next\" href=\"%s\" />", next).toCharArray());
}
writer.write("</feed>".toCharArray());
}
writer.flush();
writer.close();
return new ByteArrayInputStream(bos.toByteArray());
}
@Override
public Map<String, InputStream> getChanges(final InputStream src) throws Exception {
final Map<String, InputStream> res = new HashMap<String, InputStream>();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
IOUtils.copy(src, bos);
IOUtils.closeQuietly(src);
// retrieve properties ...
XMLEventReader reader = getEventReader(new ByteArrayInputStream(bos.toByteArray()));
final Map.Entry<Integer, XMLElement> propertyElement =
extractElement(
reader,
null,
Collections.<String>singletonList(Constants.get(ConstantKey.PROPERTIES)),
0,
2,
3);
reader.close();
reader = propertyElement.getValue().getContentReader();
try {
while (true) {
final XMLElement property = extractElement(reader, null, null, 0, -1, -1).getValue();
res.put(property.getStart().getName().getLocalPart(), property.toStream());
}
} catch (Exception ignore) {
// end
}
reader.close();
// retrieve links ...
reader = getEventReader(new ByteArrayInputStream(bos.toByteArray()));
try {
int pos = 0;
while (true) {
final Map.Entry<Integer, XMLElement> linkElement =
extractElement(
reader,
null,
Collections.<String>singletonList(Constants.get(ConstantKey.LINK)),
pos,
2,
2);
res.put(
"[Constants.get(ConstantKey.LINK)]"
+ linkElement
.getValue()
.getStart()
.getAttributeByName(new QName("title"))
.getValue(),
linkElement.getValue().toStream());
pos = linkElement.getKey();
}
} catch (Exception ignore) {
// end
}
return res;
}
