com.indeed.mph

Class TableMeta<K,V>

java.lang.Object

com.indeed.mph.TableMeta<K,V>

Type Parameters:

K - key type

V - value type

All Implemented Interfaces:

java.io.Serializable

public class TableMeta<K,V>
extends java.lang.Object
implements java.io.Serializable

All meta-information for a table, including configuration, paths, optional offsets, and the hash function itself, but not the raw data. Generally you don't need to access this directly.

Author:

alexs

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	DEFAULT_DATA_PATH
static java.lang.String	DEFAULT_META_PATH
static java.lang.String	DEFAULT_OFFSETS_PATH

Constructor Summary

Constructors

Constructor and Description
TableMeta(TableConfig<K,V> config, it.unimi.dsi.sux4j.mph.GOVMinimalPerfectHashFunction<K> mph, it.unimi.dsi.sux4j.bits.Select selectOffsets, byte[] minKey, byte[] maxKey, long dataSize)
TableMeta(TableConfig<K,V> config, it.unimi.dsi.sux4j.mph.GOVMinimalPerfectHashFunction<K> mph, it.unimi.dsi.sux4j.bits.Select selectOffsets, long dataSize)

Method Summary

Modifier and Type	Method and Description
TableConfig<K,V>	getConfig()
java.io.File	getDataPath()
long	getHash(K key)
long	getHashOffset(long hash, com.indeed.util.mmap.Memory offsets, it.unimi.dsi.sux4j.bits.Select select)
K	getMaxKey()
java.io.File	getMetaPath()
K	getMinKey()
it.unimi.dsi.sux4j.mph.GOVMinimalPerfectHashFunction<K>	getMph()
long	getOffset(K key, com.indeed.util.mmap.Memory offsets, it.unimi.dsi.sux4j.bits.Select select)
java.io.File	getOffsetsPath()
it.unimi.dsi.sux4j.bits.Select	getSelectOffsets()
long	getSizeInBytes()
long	getTimestamp()
int	getVersion()
static TableMeta	load(java.io.File metaPath)
static TableMeta	load(java.io.File input, java.io.File offsetsPath, java.io.File dataPath)
long	numEntries()
void	store(java.io.File path)
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

DEFAULT_META_PATH

public static final java.lang.String DEFAULT_META_PATH

See Also:

Constant Field Values

DEFAULT_OFFSETS_PATH

public static final java.lang.String DEFAULT_OFFSETS_PATH

See Also:

Constant Field Values

DEFAULT_DATA_PATH

public static final java.lang.String DEFAULT_DATA_PATH

See Also:

Constant Field Values

Constructor Detail

TableMeta

public TableMeta(@Nonnull
                 TableConfig<K,V> config,
                 @Nonnull
                 it.unimi.dsi.sux4j.mph.GOVMinimalPerfectHashFunction<K> mph,
                 @Nullable
                 it.unimi.dsi.sux4j.bits.Select selectOffsets,
                 @Nullable
                 byte[] minKey,
                 @Nullable
                 byte[] maxKey,
                 long dataSize)

TableMeta

public TableMeta(@Nonnull
                 TableConfig<K,V> config,
                 @Nonnull
                 it.unimi.dsi.sux4j.mph.GOVMinimalPerfectHashFunction<K> mph,
                 @Nullable
                 it.unimi.dsi.sux4j.bits.Select selectOffsets,
                 long dataSize)

Method Detail

load

public static TableMeta load(@Nonnull
                             java.io.File input,
                             @Nullable
                             java.io.File offsetsPath,
                             @Nullable
                             java.io.File dataPath)
                      throws java.io.IOException

Throws:

java.io.IOException

load

public static TableMeta load(@Nonnull
                             java.io.File metaPath)
                      throws java.io.IOException

Throws:

java.io.IOException

store

public void store(@Nonnull
                  java.io.File path)
           throws java.io.IOException

Throws:

java.io.IOException

getMetaPath

public java.io.File getMetaPath()

getOffsetsPath

public java.io.File getOffsetsPath()

getDataPath

public java.io.File getDataPath()

numEntries

public long numEntries()

getSizeInBytes

public long getSizeInBytes()

getVersion

public int getVersion()

getTimestamp

public long getTimestamp()

getMph

@Nonnull
public it.unimi.dsi.sux4j.mph.GOVMinimalPerfectHashFunction<K> getMph()

getConfig

@Nonnull
public TableConfig<K,V> getConfig()

getMinKey

@Nullable
public K getMinKey()

getMaxKey

@Nullable
public K getMaxKey()

getSelectOffsets

@Nullable
public it.unimi.dsi.sux4j.bits.Select getSelectOffsets()

getHash

public long getHash(@Nonnull
                    K key)

getOffset

public long getOffset(@Nonnull
                      K key,
                      @Nullable
                      com.indeed.util.mmap.Memory offsets,
                      @Nullable
                      it.unimi.dsi.sux4j.bits.Select select)

getHashOffset

public long getHashOffset(long hash,
                          @Nullable
                          com.indeed.util.mmap.Memory offsets,
                          @Nullable
                          it.unimi.dsi.sux4j.bits.Select select)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object