public InputStream addAtomInlinecount(final InputStream feed, final int count) throws Exception {
final XMLEventReader reader = getEventReader(feed);
final ByteArrayOutputStream bos = new ByteArrayOutputStream();
final XMLEventWriter writer = getEventWriter(bos);
try {
final XMLElement feedElement =
extractElement(reader, writer, Collections.<String>singletonList("feed"), 0, 1, 1)
.getValue();
writer.add(feedElement.getStart());
addAtomElement(
IOUtils.toInputStream(String.format("<m:count>%d</m:count>", count), Constants.ENCODING),
writer);
writer.add(feedElement.getContentReader());
writer.add(feedElement.getEnd());
while (reader.hasNext()) {
writer.add(reader.nextEvent());
}
} finally {
writer.flush();
writer.close();
reader.close();
IOUtils.closeQuietly(feed);
}
return new ByteArrayInputStream(bos.toByteArray());
}
@Override
public InputStream addEditLink(final InputStream content, final String title, final String href)
throws Exception {
final ByteArrayOutputStream copy = new ByteArrayOutputStream();
IOUtils.copy(content, copy);
IOUtils.closeQuietly(content);
XMLEventReader reader = getEventReader(new ByteArrayInputStream(copy.toByteArray()));
ByteArrayOutputStream bos = new ByteArrayOutputStream();
XMLEventWriter writer = getEventWriter(bos);
final String editLinkElement =
String.format("<link rel=\"edit\" title=\"%s\" href=\"%s\" />", title, href);
try {
// check edit link existence
extractElement(
reader,
writer,
Collections.<String>singletonList(Constants.get(ConstantKey.LINK)),
Collections.<Map.Entry<String, String>>singletonList(
new AbstractMap.SimpleEntry<String, String>("rel", "edit")),
false,
0,
-1,
-1);
addAtomElement(IOUtils.toInputStream(editLinkElement, Constants.ENCODING), writer);
writer.add(reader);
} catch (Exception e) {
reader.close();
reader = getEventReader(new ByteArrayInputStream(copy.toByteArray()));
bos = new ByteArrayOutputStream();
writer = getEventWriter(bos);
final XMLElement entryElement =
extractElement(reader, writer, Collections.<String>singletonList("entry"), 0, 1, 1)
.getValue();
writer.add(entryElement.getStart());
addAtomElement(IOUtils.toInputStream(editLinkElement, Constants.ENCODING), writer);
writer.add(entryElement.getContentReader());
writer.add(entryElement.getEnd());
writer.add(reader);
writer.flush();
writer.close();
} finally {
reader.close();
}
return new ByteArrayInputStream(bos.toByteArray());
}
private InputStream addAtomContent(
final InputStream content, final String title, final String href) throws Exception {
final ByteArrayOutputStream copy = new ByteArrayOutputStream();
IOUtils.copy(content, copy);
IOUtils.closeQuietly(content);
XMLEventReader reader = getEventReader(new ByteArrayInputStream(copy.toByteArray()));
ByteArrayOutputStream bos = new ByteArrayOutputStream();
XMLEventWriter writer = getEventWriter(bos);
try {
// check edit link existence
XMLElement contentElement =
extractElement(reader, writer, Collections.<String>singletonList("content"), 0, 2, 2)
.getValue();
writer.add(contentElement.getStart());
writer.add(contentElement.getContentReader());
writer.add(contentElement.getEnd());
writer.add(reader);
} catch (Exception e) {
reader.close();
reader = getEventReader(new ByteArrayInputStream(copy.toByteArray()));
bos = new ByteArrayOutputStream();
writer = getEventWriter(bos);
if (isMediaContent(title)) {
final XMLElement entryElement =
extractElement(reader, writer, Collections.<String>singletonList("entry"), 0, 1, 1)
.getValue();
writer.add(entryElement.getStart());
writer.add(entryElement.getContentReader());
addAtomElement(
IOUtils.toInputStream(
String.format("<content type=\"*/*\" src=\"%s/$value\" />", href)),
writer);
writer.add(entryElement.getEnd());
} else {
try {
final XMLElement entryElement =
extractElement(
reader,
writer,
Collections.<String>singletonList(Constants.get(ConstantKey.PROPERTIES)),
0,
2,
3)
.getValue();
addAtomElement(IOUtils.toInputStream("<content type=\"application/xml\">"), writer);
writer.add(entryElement.getStart());
writer.add(entryElement.getContentReader());
writer.add(entryElement.getEnd());
addAtomElement(IOUtils.toInputStream("</content>"), writer);
} catch (Exception nf) {
reader.close();
reader = getEventReader(new ByteArrayInputStream(copy.toByteArray()));
bos = new ByteArrayOutputStream();
writer = getEventWriter(bos);
final XMLElement entryElement =
extractElement(reader, writer, Collections.<String>singletonList("entry"), 0, 1, 1)
.getValue();
writer.add(entryElement.getStart());
writer.add(entryElement.getContentReader());
addAtomElement(IOUtils.toInputStream("<content type=\"application/xml\"/>"), writer);
writer.add(entryElement.getEnd());
}
}
writer.add(reader);
writer.flush();
writer.close();
} finally {
reader.close();
}
return new ByteArrayInputStream(bos.toByteArray());
}
/** {@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;
}
