Package oracle.kv.table

Interface Row

All Superinterfaces:

java.lang.Comparable<FieldValue>, FieldValue, RecordValue

All Known Subinterfaces:

PrimaryKey, ReturnRow

public interface Row
extends RecordValue

Row is a specialization of RecordValue to represent a single record, or row, in a table. It is a central object used in most table operations defined in TableAPI.

Row objects are constructed explicitly using createRow or implicitly when returned from table access operations.

Since:

3.0

Method Summary

Modifier and Type	Method	Description
Row	clone()	Returns a deep copy of this object.
PrimaryKey	createPrimaryKey()	Creates a PrimaryKey from this Row.
boolean	equals(java.lang.Object other)	Equality comparison for Row instances is based on equality of the individual field values and ignores the included Version, if present.
long	getExpirationTime()	Returns the expiration time of the row.
long	getLastModificationTime()	Returns the last modification time of the row or zero if it is not available or not yet set.
Table	getTable()	Return the Table associated with this row.
int	getTableVersion()	Returns the version of the table used to create this row if it has been deserialized from a get operation.
TimeToLive	getTTL()	Returns the time to live (TTL) value for this row or null if it has not been set by a call to setTTL(oracle.kv.table.TimeToLive).
Version	getVersion()	Returns the Version for the row.
void	setTTL(TimeToLive ttl)	Sets a time to live (TTL) value for the row to be used when the row is inserted into a store.

Methods inherited from interface java.lang.Comparable

compareTo

Methods inherited from interface oracle.kv.table.FieldValue

asArray, asBinary, asBoolean, asDouble, asEnum, asFixedBinary, asFloat, asIndexKey, asInteger, asLong, asMap, asNumber, asPrimaryKey, asRecord, asRow, asString, asTimestamp, getType, isArray, isAtomic, isBinary, isBoolean, isComplex, isDouble, isEMPTY, isEnum, isFixedBinary, isFloat, isIndexKey, isInteger, isJsonNull, isLong, isMap, isNull, isNumber, isNumeric, isPrimaryKey, isRecord, isRow, isString, isTimestamp, toJsonString

Methods inherited from interface oracle.kv.table.RecordValue

clear, contains, contains, copyFrom, get, get, getDefinition, getFieldName, getFieldNames, getFieldPos, getFields, isEmpty, put, put, put, put, put, put, put, put, put, put, put, put, put, put, put, put, put, put, putArray, putArray, putArray, putArray, putArray, putArray, putArrayAsJson, putArrayAsJson, putArrayAsJson, putArrayAsJson, putEnum, putEnum, putFixed, putFixed, putJson, putJson, putJson, putJson, putJsonNull, putJsonNull, putMap, putMap, putMap, putMap, putMapAsJson, putMapAsJson, putMapAsJson, putMapAsJson, putNull, putNull, putNumber, putNumber, putNumber, putNumber, putNumber, putNumber, putNumber, putNumber, putNumber, putNumber, putRecord, putRecord, putRecord, putRecord, putRecordAsJson, putRecordAsJson, putRecordAsJson, putRecordAsJson, remove, size, toString

Method Detail

getTable

Table getTable()

Return the Table associated with this row.

Returns:

the Table

getVersion

Version getVersion()

Returns the Version for the row. The description of Version in its class description refers to its use in the KVStore interface. In TableAPI it it used as a return value for the various put methods as well as TableAPI.putIfVersion(oracle.kv.table.Row, oracle.kv.Version, oracle.kv.table.ReturnRow, oracle.kv.table.WriteOptions) and TableAPI.deleteIfVersion(oracle.kv.table.PrimaryKey, oracle.kv.Version, oracle.kv.table.ReturnRow, oracle.kv.table.WriteOptions) to perform conditional updates to allow an application to ensure that an update is occurring on the desired version of a row.

Returns:

the Version object if it has been initialized, null otherwise. The Version will only be set if the row was retrieved from the store.

createPrimaryKey

PrimaryKey createPrimaryKey()

Creates a PrimaryKey from this Row. The non-key fields are removed.

Returns:

the PrimaryKey

getTableVersion

int getTableVersion()

Returns the version of the table used to create this row if it has been deserialized from a get operation. If the row has been created and never been serialized the version returned is 0. New Table versions are created when a table is schema evolved. Tables start out with version 1 and it increments with each change. This method can be used by applications to help handle version changes.

equals

boolean equals(java.lang.Object other)

Equality comparison for Row instances is based on equality of the individual field values and ignores the included Version, if present.

Overrides:

equals in class java.lang.Object

Returns:

true if the objects are equal

clone

Row clone()

Returns a deep copy of this object.

Specified by:

clone in interface FieldValue

Specified by:

clone in interface RecordValue

Returns:

a deep copy of this object

setTTL

void setTTL(TimeToLive ttl)

Sets a time to live (TTL) value for the row to be used when the row is inserted into a store. If not set, or if the value is null, the table default value will be used. If no expiration time is desired, a TimeToLive instance of duration 0 should be used. The constant, TimeToLive.DO_NOT_EXPIRE, exists as a convenience for that purpose.

It is recommended that the TimeToLive be constructed using TimeToLive.ofDays(long) to use less space in the store. If hours are needed then TimeToLive.ofHours(long) can be used at the expense of additional storage used.

Parameters:

ttl - the value to use, may be null

Throws:

java.lang.IllegalArgumentException - if the TimeToLive is negative

Since:

4.0

getTTL

TimeToLive getTTL()

Returns the time to live (TTL) value for this row or null if it has not been set by a call to setTTL(oracle.kv.table.TimeToLive). If this is null it means that the table default will be used on a put operation. The TTL property of a Row is used only on input. The expiration time of a Row is available on output, or after a put operation using getExpirationTime().

Returns:

the TimeToLive for the row or null if not set

Since:

4.0

getExpirationTime

long getExpirationTime()

Returns the expiration time of the row. A zero value indicates that the row does not expire or has not yet been set. The expiration time is set if this row was returned by a get (e.g. TableAPI.get(oracle.kv.table.PrimaryKey, oracle.kv.table.ReadOptions)) or table iterator (e.g. TableAPI.tableIterator(oracle.kv.table.PrimaryKey, oracle.kv.table.MultiRowOptions, oracle.kv.table.TableIteratorOptions)) call. It will also be set after a successful put of the row (e.g. TableAPI.put(oracle.kv.table.Row, oracle.kv.table.ReturnRow, oracle.kv.table.WriteOptions).

Returns:

the expiration time in milliseconds since January 1, 1970, or zero if the record never expires

Since:

4.0

getLastModificationTime

long getLastModificationTime()

Returns the last modification time of the row or zero if it is not available or not yet set. If the row was written by a version of the system older than 19.5 the last modification time will not be available at all and will be zero.

The modification time is set if this row was returned by a get (e.g. TableAPI.get(oracle.kv.table.PrimaryKey, oracle.kv.table.ReadOptions)) or table iterator (e.g. TableAPI.tableIterator(oracle.kv.table.PrimaryKey, oracle.kv.table.MultiRowOptions, oracle.kv.table.TableIteratorOptions)) call. It will also be valid after a successful put of the row (e.g. TableAPI.put(oracle.kv.table.Row, oracle.kv.table.ReturnRow, oracle.kv.table.WriteOptions).

Returns:

the last update time in milliseconds since January 1, 1970 or 0 if not available.

Since:

22.1