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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

All known Subclasses:   it.unimi.dsi.mg4j.search .AbstractUnionDocumentIterator,  it.unimi.dsi.mg4j.search .AbstractIntersectionDocumentIterator,
AbstractCompositeDocumentIterator
abstract public class AbstractCompositeDocumentIterator extends AbstractDocumentIterator implements DocumentIterator(Code)
An abstract iterator on documents, based on a list of component iterators.
The caches into AbstractCompositeDocumentIterator.documentIterator the component iterators, and sets up a number of protected fields that can be useful to implementors. It also provide abstract member classes that make it easier to implement interval iterators.
Note that this class implementa both AbstractCompositeDocumentIterator.accept(DocumentIteratorVisitor) and AbstractCompositeDocumentIterator.acceptOnTruePaths(DocumentIteratorVisitor) with a series of recursive calls on all component iterator. If you desire a different behaviour for AbstractCompositeDocumentIterator.acceptOnTruePaths(DocumentIteratorVisitor) (see, e.g., it.unimi.dsi.mg4j.search.OrDocumentIterator , please override it.

Inner Class :abstract protected static class AbstractCompositeIntervalIterator extends AbstractIntervalIterator
Inner Class :abstract protected static class AbstractCompositeIndexIntervalIterator extends AbstractIntervalIterator

Field Summary
final protected DocumentIterator[] documentIterator
     The component document iterators.
final protected IndexIterator[] indexIterator
     A cached copy of AbstractCompositeDocumentIterator.documentIterator , if all underlying iterators are ; null, otherwise.
final protected ReferenceArraySet<Index> indices
     The set of indices involved in this iterator.
final protected int n
     The number of component iterators.
final protected Index soleIndex
     If not null, the sole index involved in this iterator.

Constructor Summary
public AbstractCompositeDocumentIterator(DocumentIterator... documentIterator)
     Creates a new composite document iterator using a given list of component document iterators.

Method Summary
public boolean accept(DocumentIteratorVisitor visitor)

public boolean acceptOnTruePaths(DocumentIteratorVisitor visitor)

public void dispose()

public ReferenceSet<Index> indices()

public IntervalIterator intervalIterator()

public String toString()


Field Detail
documentIterator
final protected DocumentIterator[] documentIterator(Code)
The component document iterators.

indexIterator
final protected IndexIterator[] indexIterator(Code)
A cached copy of AbstractCompositeDocumentIterator.documentIterator , if all underlying iterators are ; null, otherwise.

indices
final protected ReferenceArraySet<Index> indices(Code)
The set of indices involved in this iterator.

n
final protected int n(Code)
The number of component iterators.

soleIndex
final protected Index soleIndex(Code)
If not null, the sole index involved in this iterator.

Constructor Detail
AbstractCompositeDocumentIterator
public AbstractCompositeDocumentIterator(DocumentIterator... documentIterator)(Code)
Creates a new composite document iterator using a given list of component document iterators.
Parameters:
  documentIterator - the component iterators.

Method Detail
accept
public boolean accept(DocumentIteratorVisitor visitor) throws IOException(Code)

acceptOnTruePaths
public boolean acceptOnTruePaths(DocumentIteratorVisitor visitor) throws IOException(Code)

dispose
public void dispose() throws IOException(Code)

indices
public ReferenceSet<Index> indices()(Code)

intervalIterator
public IntervalIterator intervalIterator() throws IOException(Code)

toString
public String toString()(Code)

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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