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See:
Description
| Interface Summary | |
|---|---|
| BitWritablePosting | As WritablePosting, but using the BitWritable interface. |
| BlockPosting | Interface implemented by Posting objects that have position information recorded. |
| FieldPosting | Interface implemented by Posting objects that have field information recorded. |
| IterablePosting | An interface that allows a list of postings to be iterated over |
| Posting | This interface represents one posting in a posting list. |
| WritablePosting | Allow a Posting to be written to a DataOut |
| Class Summary | |
|---|---|
| ArrayOfBasicIterablePosting | An instance of IterablePostings that works with passed arrays of ids and frequencies |
| ArrayOfIdsIterablePosting | An instance of IterablePostings that works with a passed array of ids |
| BasicIterablePosting | Basic inverted and direct index format: [gamma(first docid +1) unary (frequency)], [gamma(delta docid) unary(frequency)] |
| BasicIterablePostingDocidOnly | Posting iterator class that only returns identifiers, not frequencies. |
| BasicPostingImpl | Implementation of a Posting that is non-iterable. |
| BlockFieldIterablePosting | class BlockFieldIterablePosting |
| BlockFieldORIterablePosting | ORIterablePosting implementation that implements FieldPosting and BlockPosting |
| BlockFieldPostingImpl | A writable block field posting list |
| BlockIterablePosting | A writable block iterable posting list |
| BlockORIterablePosting | ORIterablePosting implementation that implements BlockPosting |
| BlockPostingImpl | BlockPostingImpl class |
| FieldIterablePosting | A posting iterator for field postings. |
| FieldORIterablePosting | ORIterablePosting implementation that implements FieldPosting |
| FieldPostingImpl | Implementation of a posting containing fields |
| IterablePostingImpl | A base implementation of an IterablePosting, that provides a base implementation of next(int) method. |
| ORIterablePosting | An IterablePosting that combines more than one IterablePosting into a single IterablePosting. |
| PostingIdComparator | A comparator object for Posting objects, where they are sorted by id. |
| PostingUtil | Handy methods for Posting classes, such as obtaining all ids in a posting list, or selecting the minimum id in an array of posting lists. |
Provides classes representing single postings and atreams of postings in a posting list (e.g. an inverted index or a direct index).
A single posting (e.g. occurrences of a term in document) is represented by a Posting object.
Posting p;
System.out.println("Docid "+ p.getId() + " has " + p.getFrequency() + " occurrences");
A stream of postings (e.g. terms in a document or occurrences of a term) are represented by an IterablePosting stream.
IterablePosting ip = //obtain from InvertedIndex;
while(ip.next() != IterablePosting.EOL)
{
System.err.println("Docid "+ ip.getId() + " has " + ip.getFrequency() + " occurrences");
}
More complex posting implementations are supported by other Posting child interfaces:
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