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java.lang.Object org.terrier.structures.indexing.singlepass.MemoryPostings
public class MemoryPostings
Class for handling Simple posting lists in memory while indexing.
Field Summary | |
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protected long |
keyBytes
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protected static org.apache.log4j.Logger |
logger
logger to use in this class |
protected int |
maxSize
The number of documents for any term in this run |
protected long |
numPointers
Number of pointers ( |
protected java.util.Map<java.lang.String,Posting> |
postings
Hashmap indexed by the term, containing the posting lists |
protected long |
valueBytes
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Constructor Summary | |
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MemoryPostings()
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Method Summary | |
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void |
add(java.lang.String term,
int doc,
int frequency)
Adds an occurrence of a term in a document to the posting in memory. |
void |
addTerms(DocumentPostingList docPostings,
int docid)
Add the terms in a DocumentPostingList to the postings in memory. |
void |
finish(RunWriter runWriter)
Triggers the writing of the postings in memory to the specified RunWriter. |
void |
finish(java.lang.String[] file)
Triggers the writing of the postings in memory to disk. |
long |
getMemoryConsumption()
Returns the number of bytes consumed by this set of postings |
long |
getPointers()
Returns the number of pointers in this posting list. |
int |
getSize()
Returns the number of terms in this posting list. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected static final org.apache.log4j.Logger logger
protected java.util.Map<java.lang.String,Posting> postings
protected int maxSize
protected long numPointers
protected long keyBytes
protected long valueBytes
Constructor Detail |
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public MemoryPostings()
Method Detail |
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public void addTerms(DocumentPostingList docPostings, int docid) throws java.io.IOException
docPostings
- DocumentPostingList containing the term information for the denoted document.docid
- Current document Identifier.
java.io.IOException
- if an I/O error occurs.public void add(java.lang.String term, int doc, int frequency) throws java.io.IOException
term
- String representing the term.doc
- int containing the document identifier.frequency
- int containing the frequency of the term in the document.
java.io.IOException
- if an I/O error occurs.public void finish(java.lang.String[] file) throws java.io.IOException
file
- name of the file to write the postings.
java.io.IOException
- if an I/O error occurs.public void finish(RunWriter runWriter) throws java.io.IOException
runWriter
-
java.io.IOException
public int getSize()
public long getMemoryConsumption()
public long getPointers()
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