Package org.h2.value.lob
Class LobDataFetchOnDemand
java.lang.Object
org.h2.value.lob.LobData
org.h2.value.lob.LobDataFetchOnDemand
A implementation of the LOB data used on the client side of a remote H2
connection. Fetches the underlying on data from the server.
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate SessionRemote
protected final byte[]
If this is a client-side ValueLobDb object returned by a ResultSet, the hmac acts a security cookie that the client can send back to the server to ask for data related to this LOB.private final long
private final int
If the LOB is managed by the one the LobStorageBackend classes, these are the unique key inside that storage. -
Constructor Summary
ConstructorsConstructorDescriptionLobDataFetchOnDemand
(DataHandler handler, int tableId, long lobId, byte[] hmac) -
Method Summary
Modifier and TypeMethodDescriptiongetInputStream
(long precision) Get stream to read LOB data fromlong
getLobId()
int
Get the current table id of this lob.boolean
Check if this value is linked to a specific table.toString()
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Field Details
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handler
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tableId
private final int tableIdIf the LOB is managed by the one the LobStorageBackend classes, these are the unique key inside that storage. -
lobId
private final long lobId -
hmac
protected final byte[] hmacIf this is a client-side ValueLobDb object returned by a ResultSet, the hmac acts a security cookie that the client can send back to the server to ask for data related to this LOB.
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Constructor Details
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LobDataFetchOnDemand
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Method Details
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isLinkedToTable
public boolean isLinkedToTable()Check if this value is linked to a specific table. For values that are kept fully in memory, this method returns false.- Overrides:
isLinkedToTable
in classLobData
- Returns:
- true if it is
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getTableId
public int getTableId()Get the current table id of this lob.- Returns:
- the table id
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getLobId
public long getLobId() -
getInputStream
Description copied from class:LobData
Get stream to read LOB data from- Specified by:
getInputStream
in classLobData
- Parameters:
precision
- octet length of the stream, or -1 if unknown- Returns:
- stream to read LOB data from
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getDataHandler
- Overrides:
getDataHandler
in classLobData
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toString
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