lux.index.analysis

Class TextOffsetTokenStream

java.lang.Object

org.apache.lucene.util.AttributeSource

org.apache.lucene.analysis.TokenStream

lux.index.analysis.XmlTokenStreamBase

lux.index.analysis.TextOffsetTokenStream

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

AttributeTokenStream, ElementTokenStream, XmlTextTokenStream

public abstract class TextOffsetTokenStream
extends XmlTokenStreamBase

This TokenStream records the offsets (character positions in the original text) of every token. It records the start offset of each text node, and whenever there is a difference between the length of the serialized XML and the length of the text, it records the offset just after the discrepancy. For example if a character entity (like &) occurs in the XML, this is translated to "&" in the text, and a character offset is recorded for the character just following the "&".

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource

org.apache.lucene.util.AttributeSource.AttributeFactory, org.apache.lucene.util.AttributeSource.State

Field Summary

Fields inherited from class lux.index.analysis.XmlTokenStreamBase

charStream, contentIter, curNode, defVis, eltVis, EMPTY, termAtt

Constructor Summary

Constructors

Constructor and Description
TextOffsetTokenStream(String fieldName, org.apache.lucene.analysis.Analyzer analyzer, org.apache.lucene.analysis.TokenStream wrapped, net.sf.saxon.s9api.XdmNode doc, Offsets offsets)

Method Summary

Methods

Modifier and Type	Method and Description
protected boolean	resetTokenizer(CharSequence text)

Methods inherited from class lux.index.analysis.XmlTokenStreamBase

close, getDefaultVisibility, getElementVisibility, getWrappedTokenStream, incrementToken, incrementWrappedTokenStream, reset, reset, setDefaultVisibility, setElementVisibility, setWrappedTokenStream

Methods inherited from class org.apache.lucene.analysis.TokenStream

end

Methods inherited from class org.apache.lucene.util.AttributeSource

addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, restoreState, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

TextOffsetTokenStream

public TextOffsetTokenStream(String fieldName,
                     org.apache.lucene.analysis.Analyzer analyzer,
                     org.apache.lucene.analysis.TokenStream wrapped,
                     net.sf.saxon.s9api.XdmNode doc,
                     Offsets offsets)

Method Detail

resetTokenizer

protected boolean resetTokenizer(CharSequence text)