@Override
public void map(
Writable key,
BytesWritable value,
Mapper<Writable, BytesWritable, Text, BytesWritable>.Context context)
throws IOException, InterruptedException {
DocumentWrapper docWrapper = DocumentProtos.DocumentWrapper.parseFrom(value.copyBytes());
String docKey = keyGen.generateKey(docWrapper.getDocumentMetadata(), 0);
if (!docKey.isEmpty()) {
DocumentWrapper thinDocWrapper = DocumentWrapperUtils.cloneDocumentMetadata(docWrapper);
context.write(new Text(docKey), new BytesWritable(thinDocWrapper.toByteArray()));
}
}
@Override
public DataBag exec(Tuple input) throws IOException {
if (input == null || input.size() == 0) {
return null;
}
try {
DataByteArray dba = null;
try {
dba = (DataByteArray) input.get(0);
} catch (ExecException e) {
logger.error("Error in reading field:", e);
throw e;
}
DocumentWrapper dm = null;
try {
dm = DocumentWrapper.parseFrom(dba.get());
} catch (Exception e) {
logger.error("Error in reading ByteArray to DocumentMetadata:", e);
throw e;
}
DataBag ret = new DefaultDataBag();
DataByteArray metadata = new DataByteArray(dm.getDocumentMetadata().toByteArray());
List<Author> authors = dm.getDocumentMetadata().getBasicMetadata().getAuthorList();
for (int i = 0; i < authors.size(); i++) {
String sname = authors.get(i).getSurname();
Object[] to = new Object[] {sname, metadata, i};
Tuple t = TupleFactory.getInstance().newTuple(Arrays.asList(to));
ret.add(t);
}
return ret;
} catch (Exception e) {
logger.error("Error in processing input row:", e);
throw new IOException(
"Caught exception processing input row:\n" + StackTraceExtractor.getStackTrace(e));
}
}
@Override
protected void map(Writable key, BytesWritable value, Context context)
throws IOException, InterruptedException {
int percentOfWritten = context.getConfiguration().getInt("percentOfWritten", 100);
DocumentWrapper docWrapper = DocumentProtos.DocumentWrapper.parseFrom(value.copyBytes());
log.info(
"work title = "
+ docWrapper.getDocumentMetadata().getBasicMetadata().getTitle(0).getText());
if ((i % 101) > 100 - percentOfWritten) {
log.info("writing...");
context.write(new Text(docWrapper.getRowId()), new BytesWritable(value.copyBytes()));
}
i++;
}
/**
* Find duplicates in the passed document list. Every set of duplicates is written under a unique
* key in the returned map. Whether 2 documents are considered duplicates is determined by {@link
* DuplicateWorkVoter#isDuplicate(DocumentWrapper, DocumentWrapper)}
*
* <p>E.g. let's assume we passed to the method the documents symbolized here as: AAA, BBb, bbb,
* AAa, aAA, ccc And that: AAA is duplicate of AAa and aAA, and: BBb is duplicate of bbb
*
* <p>Then the result of this method will be something like this: <1, <AAA, AAa, aAA>> <2, <BBb,
* bbb>>
*/
public Map<Integer, Set<DocumentWrapper>> findDuplicates(List<DocumentWrapper> documents) {
Map<Integer, Set<DocumentWrapper>> sameWorksMap = Maps.newHashMap();
List<DocumentWrapper> documentsCopy = Lists.newArrayList(documents);
int i = 0;
for (DocumentWrapper document : documents) {
for (DocumentWrapper other : new ArrayList<DocumentWrapper>(documentsCopy)) {
if (document.getRowId().equals(other.getRowId())) {
documentsCopy.remove(other);
} else {
if (duplicateWorkVoter.isDuplicate(document, other)) {
addSameWorks(sameWorksMap, i, document, other);
documentsCopy.remove(other);
}
}
}
i++;
}
return sameWorksMap;
}
@Override
public Tuple exec(Tuple input) throws IOException {
myreporter = PigStatusReporter.getInstance();
if (input == null || input.size() == 0) {
return null;
}
try {
DataByteArray dba = null;
DocumentMetadata dm = null;
String title = null;
String doi = null;
String year = null;
try {
dba = (DataByteArray) input.get(0);
} catch (Exception e) {
myreporter.getCounter("extraction problems", "DataByteArray from tuple");
return null;
}
try {
dm = DocumentWrapper.parseFrom(dba.get()).getDocumentMetadata();
} catch (Exception e) {
myreporter.getCounter("extraction problems", "document metadata");
return null;
}
try {
for (TextWithLanguage twl : dm.getBasicMetadata().getTitleList()) {
if (twl.getLanguage().toLowerCase().startsWith("en")) {
title = twl.getText();
break;
}
}
if (title == null) {
title = dm.getBasicMetadata().getTitle(0).getText();
}
if (title != null && !title.trim().isEmpty()) {
title = DiacriticsRemover.removeDiacritics(title);
title = title.replaceAll("[^A-Za-z0-9\\-_]", " ").replaceAll("\\s++", " ").trim();
}
} catch (Exception e) {
} finally {
if (title == null || title.trim().isEmpty()) {
myreporter.getCounter("extraction problems", "title extraction");
return null;
}
}
try {
doi = dm.getBasicMetadata().getDoi().replaceAll("\\s++", " ").trim();
} catch (Exception e) {
} finally {
if (doi == null || doi.trim().isEmpty()) {
myreporter.getCounter("extraction problems", "doi extraction");
return null;
}
}
try {
year = dm.getBasicMetadata().getYear().replaceAll("\\s++", " ").trim();
} catch (Exception e) {
} finally {
if (year == null || year.trim().isEmpty()) {
myreporter.getCounter("extraction problems", "year extraction");
return null;
}
}
Tuple t = TupleFactory.getInstance().newTuple();
t.append(doi);
t.append(year);
t.append(title);
return t;
} catch (Exception e) {
logger.debug(StackTraceExtractor.getStackTrace(e));
throw new IOException(e);
}
}