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java.lang.Object de.lmu.ifi.dbs.elki.persistent.DefaultPageHeader de.lmu.ifi.dbs.elki.index.tree.TreeIndexHeader de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.mktrees.MkTreeHeader
public class MkTreeHeader
Encapsulates the header information for subclasses of
AbstractMkTreeUnified
.
This information is needed for persistent storage.
Field Summary | |
---|---|
private int |
k_max
The maximum number k of reverse kNN queries to be supported. |
private static int |
SIZE
The size of this header in Bytes, which is 4 Bytes (for k_max ). |
Constructor Summary | |
---|---|
MkTreeHeader()
Empty constructor for serialization. |
|
MkTreeHeader(int pageSize,
int dirCapacity,
int leafCapacity,
int k_max)
Creates a nerw header with the specified parameters. |
Method Summary | |
---|---|
int |
getK_max()
Returns the parameter k. |
void |
readHeader(RandomAccessFile file)
Initializes this header from the specified file. |
int |
size()
Returns TreeIndexHeader.size()
plus the value of SIZE ). |
void |
writeHeader(RandomAccessFile file)
Writes this header to the specified file. |
Methods inherited from class de.lmu.ifi.dbs.elki.index.tree.TreeIndexHeader |
---|
getDirCapacity, getDirMinimum, getEmptyPagesSize, getLargestPageID, getLeafCapacity, getLeafMinimum, readEmptyPages, setEmptyPagesSize, setLargestPageID, writeEmptyPages |
Methods inherited from class de.lmu.ifi.dbs.elki.persistent.DefaultPageHeader |
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asByteArray, getPageSize, getReservedPages, readHeader |
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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private static int SIZE
k_max
).
private int k_max
Constructor Detail |
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public MkTreeHeader()
public MkTreeHeader(int pageSize, int dirCapacity, int leafCapacity, int k_max)
pageSize
- the size of a page in bytesdirCapacity
- the capacity of a directory nodeleafCapacity
- the capacity of a leaf nodek_max
- the parameter kMethod Detail |
---|
public void readHeader(RandomAccessFile file) throws IOException
TreeIndexHeader#readHeader(file)
and reads additionally the integer value of
k_max
from the file.
readHeader
in interface PageHeader
readHeader
in class TreeIndexHeader
file
- the file to which this header belongs
IOException
- if an I/O-error occurs during readingpublic void writeHeader(RandomAccessFile file) throws IOException
TreeIndexHeader.writeHeader(java.io.RandomAccessFile)
and writes additionally the integer value of
k_max
to the file.
writeHeader
in interface PageHeader
writeHeader
in class TreeIndexHeader
file
- the file to which this header belongs
IOException
- IOException if an I/O-error occurs during writingpublic int getK_max()
public int size()
TreeIndexHeader.size()
plus the value of SIZE
).
size
in interface PageHeader
size
in class TreeIndexHeader
|
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