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java.lang.Object org.apache.lucene.codecs.PostingsReaderBase
public abstract class PostingsReaderBase
The core terms dictionaries (BlockTermsReader,
BlockTreeTermsReader) interact with a single instance
of this class to manage creation of DocsEnum
and
DocsAndPositionsEnum
instances. It provides an
IndexInput (termsIn) where this class may read any
previously stored data that it had written in its
corresponding PostingsWriterBase
at indexing
time.
Constructor Summary | |
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protected |
PostingsReaderBase()
Sole constructor. |
Method Summary | |
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abstract void |
close()
|
abstract DocsEnum |
docs(FieldInfo fieldInfo,
BlockTermState state,
Bits skipDocs,
DocsEnum reuse,
int flags)
Must fully consume state, since after this call that TermState may be reused. |
abstract DocsAndPositionsEnum |
docsAndPositions(FieldInfo fieldInfo,
BlockTermState state,
Bits skipDocs,
DocsAndPositionsEnum reuse,
int flags)
Must fully consume state, since after this call that TermState may be reused. |
abstract void |
init(IndexInput termsIn)
Performs any initialization, such as reading and verifying the header from the provided terms dictionary IndexInput . |
abstract BlockTermState |
newTermState()
Return a newly created empty TermState |
abstract void |
nextTerm(FieldInfo fieldInfo,
BlockTermState state)
Actually decode metadata for next term |
abstract void |
readTermsBlock(IndexInput termsIn,
FieldInfo fieldInfo,
BlockTermState termState)
Reads data for all terms in the next block; this method should merely load the byte[] blob but not decode, which is done in nextTerm(org.apache.lucene.index.FieldInfo, org.apache.lucene.codecs.BlockTermState) . |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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protected PostingsReaderBase()
Method Detail |
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public abstract void init(IndexInput termsIn) throws IOException
IndexInput
.
IOException
public abstract BlockTermState newTermState() throws IOException
IOException
public abstract void nextTerm(FieldInfo fieldInfo, BlockTermState state) throws IOException
IOException
public abstract DocsEnum docs(FieldInfo fieldInfo, BlockTermState state, Bits skipDocs, DocsEnum reuse, int flags) throws IOException
IOException
public abstract DocsAndPositionsEnum docsAndPositions(FieldInfo fieldInfo, BlockTermState state, Bits skipDocs, DocsAndPositionsEnum reuse, int flags) throws IOException
IOException
public abstract void close() throws IOException
close
in interface Closeable
IOException
public abstract void readTermsBlock(IndexInput termsIn, FieldInfo fieldInfo, BlockTermState termState) throws IOException
nextTerm(org.apache.lucene.index.FieldInfo, org.apache.lucene.codecs.BlockTermState)
.
IOException
|
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