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Java Source Code / Java Documentation » Search Engine » mg4j » it.unimi.dsi.mg4j.search

Source Cross Reference

Class Diagram

Java Document (Java Doc)

it.unimi.dsi.mg4j.search .AbstractDocumentIterator

it.unimi.dsi.mg4j.search .AbstractCompositeDocumentIterator

it.unimi.dsi.mg4j.search .AbstractUnionDocumentIterator

All known Subclasses:   it.unimi.dsi.mg4j.index .MultiTermIndexIterator,  it.unimi.dsi.mg4j.search .OrDocumentIterator,
AbstractUnionDocumentIterator
abstract public class AbstractUnionDocumentIterator extends AbstractCompositeDocumentIterator (Code)
A document iterator on documents, generating the union of the documents returned by a number of document iterators.
The pattern of this class is the same as that of AbstractIntersectionDocumentIterator . Additionally, this class provides a mechanism that makes accessible the set of component document iterators that are .

Field Summary
final protected int[] curr
     The reference array used for the queue.
final protected int[] front
     The IndirectPriorityQueue.front(int[]) of AbstractUnionDocumentIterator.queue , if AbstractUnionDocumentIterator.frontSize is not -1.
protected int frontSize
     The number of valid entries in AbstractUnionDocumentIterator.front , or -1 if the front has not been computed for the current document.
final protected IntHeapSemiIndirectPriorityQueue queue
     A heap-based semi-indirect priority queue used to keep track of the currently scanned integers.

Constructor Summary
protected AbstractUnionDocumentIterator(DocumentIterator... documentIterator)
     Creates a new document iterator that computes the OR of the given array of iterators.

Method Summary
public boolean acceptOnTruePaths(DocumentIteratorVisitor visitor)
     Invokes AbstractUnionDocumentIterator.acceptOnTruePaths(DocumentIteratorVisitor) only on component iterators positioned on the current document.
Parameters:
  visitor - a visitor.
protected int computeFront()
     Forces computation of the current front, returning the number of indices it contains.
After a call to this method, the first elements of AbstractUnionDocumentIterator.front contain the indices of the that are positioned on the current document.
abstract protected IntervalIterator getComposedIntervalIterator(Index index)

public IntervalIterator intervalIterator(Index index)

public Reference2ReferenceMap<Index, IntervalIterator> intervalIterators()

public int nextDocument()

public int skipTo(int n)


Field Detail
curr
final protected int[] curr(Code)
The reference array used for the queue.

front
final protected int[] front(Code)
The IndirectPriorityQueue.front(int[]) of AbstractUnionDocumentIterator.queue , if AbstractUnionDocumentIterator.frontSize is not -1.

frontSize
protected int frontSize(Code)
The number of valid entries in AbstractUnionDocumentIterator.front , or -1 if the front has not been computed for the current document.

queue
final protected IntHeapSemiIndirectPriorityQueue queue(Code)
A heap-based semi-indirect priority queue used to keep track of the currently scanned integers.

Constructor Detail
AbstractUnionDocumentIterator
protected AbstractUnionDocumentIterator(DocumentIterator... documentIterator) throws IOException(Code)
Creates a new document iterator that computes the OR of the given array of iterators.
Parameters:
  documentIterator - the iterators to be joined.
throws:
  IOException -

Method Detail
acceptOnTruePaths
public boolean acceptOnTruePaths(DocumentIteratorVisitor visitor) throws IOException(Code)
Invokes AbstractUnionDocumentIterator.acceptOnTruePaths(DocumentIteratorVisitor) only on component iterators positioned on the current document.
Parameters:
  visitor - a visitor. true if the visit should continue.
throws:
  IOException -

computeFront
protected int computeFront()(Code)
Forces computation of the current front, returning the number of indices it contains.
After a call to this method, the first elements of AbstractUnionDocumentIterator.front contain the indices of the that are positioned on the current document. If the front has already been computed for the current document, this method has no side effects. the size of the current front (the number of valid entries in AbstractUnionDocumentIterator.front).

getComposedIntervalIterator
abstract protected IntervalIterator getComposedIntervalIterator(Index index)(Code)

intervalIterator
public IntervalIterator intervalIterator(Index index) throws IOException(Code)

intervalIterators
public Reference2ReferenceMap<Index, IntervalIterator> intervalIterators() throws IOException(Code)

nextDocument
public int nextDocument() throws IOException(Code)

skipTo
public int skipTo(int n) throws IOException(Code)

Fields inherited from it.unimi.dsi.mg4j.search.AbstractCompositeDocumentIterator
final protected DocumentIterator[] documentIterator(Code)(Java Doc)
final protected IndexIterator[] indexIterator(Code)(Java Doc)
final protected ReferenceArraySet<Index> indices(Code)(Java Doc)
final protected int n(Code)(Java Doc)
final protected Index soleIndex(Code)(Java Doc)

Methods inherited from it.unimi.dsi.mg4j.search.AbstractCompositeDocumentIterator
public boolean accept(DocumentIteratorVisitor visitor) throws IOException(Code)(Java Doc)
public boolean acceptOnTruePaths(DocumentIteratorVisitor visitor) throws IOException(Code)(Java Doc)
public void dispose() throws IOException(Code)(Java Doc)
public ReferenceSet<Index> indices()(Code)(Java Doc)
public IntervalIterator intervalIterator() throws IOException(Code)(Java Doc)
public String toString()(Code)(Java Doc)

Fields inherited from it.unimi.dsi.mg4j.search.AbstractDocumentIterator
protected int last(Code)(Java Doc)
protected int next(Code)(Java Doc)

Methods inherited from it.unimi.dsi.mg4j.search.AbstractDocumentIterator
public int document()(Code)(Java Doc)
public boolean hasNext()(Code)(Java Doc)
public IntervalIterator iterator()(Code)(Java Doc)
public int nextInt()(Code)(Java Doc)

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