/**
* 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
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++;
}