| java.lang.Object
 com.sleepycat.collections.DataView
| DataView | | final class DataView implements Cloneable(Code) | | Represents a Berkeley DB database and adds support for indices, bindings and
key ranges.
This class defines a view and takes care of reading and updating indices,
calling bindings, constraining access to a key range, etc.
author:
Mark Hayes |
| Method Summary | |
| OperationStatus | append(Object value, Object[] retPrimaryKey, Object[] retValue)
Appends a value and returns the new key. | | final boolean | canDeriveKeyFromValue()
Returns whether data keys can be derived from the value/entity binding
of this view, which determines whether a value/entity object alone is
sufficient for operations that require keys. | | void | clear()
Deletes all records in the current range. | | DataView | configuredView(CursorConfig config)
Returns a new view with a specified cursor configuration. | | DataView | duplicatesView(Object secondaryKey, EntryBinding primaryKeyBinding)
Return a new duplicates view for a given secondary key. | | CurrentTransaction | getCurrentTxn()
Returns the current transaction for the view or null if the environment
is non-transactional. | | final Environment | getEnv()
Returns the environment for the database. | | DatabaseEntry | getSingleKeyThang()
Returns the key thang for a single key range, or null if a single key
range is not used. | | boolean | isEmpty()
Returns whether no records are present in the view. | | final boolean | isSecondary()
Returns whether this is a view on a secondary database rather
than directly on a primary database. | | DataCursor | join(DataView[] indexViews, Object[] indexKeys, JoinConfig joinConfig)
Returns a cursor for this view that reads only records having the
specified index key values. | | DataCursor | join(DataCursor[] indexCursors, JoinConfig joinConfig)
Returns a cursor for this view that reads only records having the
index key values at the specified cursors. | | DataView | keySetView()
Return a new key-set view derived from this view by setting the
entity and value binding to null. | | Object | makeKey(DatabaseEntry keyThang, DatabaseEntry priKeyThang)
Converts a key entry to a key object. | | Object | makeValue(DatabaseEntry primaryKeyThang, DatabaseEntry valueThang)
Converts a key-value entry pair to a value object. | | KeyRange | subRange(KeyRange useRange, Object singleKey)
Intersects the given key and the current range. | | KeyRange | subRange(KeyRange useRange, Object beginKey, boolean beginInclusive, Object endKey, boolean endInclusive)
Intersects the given range and the current range. | | DataView | subView(Object beginKey, boolean beginInclusive, Object endKey, boolean endInclusive, EntryBinding keyBinding)
Return a new value-set view for key range, optionally changing
the key binding. | | boolean | useKey(Object key, Object value, DatabaseEntry keyThang, KeyRange checkRange)
Populates the key entry and returns whether the key is within range. | | KeyRange | useSubRange()
Returns the range to use for sub-ranges. | | Transaction | useTransaction()
Returns the current transaction if the database is transaction, or null
if the database is not transactional or there is no current transaction. | | void | useValue(Object value, DatabaseEntry valueThang, DatabaseEntry checkKeyThang)
Populates the value entry and throws an exception if the primary key
would be changed via an entity binding. | | DataView | valueSetView()
Return a new value-set view derived from this view by setting the
key binding to null. | | DataView | valueSetView(Object singleKey)
Return a new value-set view for single key range.
Parameters:
singleKey - the single key value. |
| btreeRecNumAccess | | boolean btreeRecNumAccess(Code) | | |
| btreeRecNumDb | | boolean btreeRecNumDb(Code) | | |
| dupsAllowed | | boolean dupsAllowed(Code) | | |
| dupsOrdered | | boolean dupsOrdered(Code) | | |
| dupsView | | boolean dupsView(Code) | | |
| keysRenumbered | | boolean keysRenumbered(Code) | | |
| readUncommittedAllowed | | boolean readUncommittedAllowed(Code) | | |
| recNumAccess | | boolean recNumAccess(Code) | | |
| recNumAllowed | | boolean recNumAllowed(Code) | | |
| recNumRenumber | | boolean recNumRenumber(Code) | | |
| transactional | | boolean transactional(Code) | | |
| writeAllowed | | boolean writeAllowed(Code) | | |
| canDeriveKeyFromValue | | final boolean canDeriveKeyFromValue()(Code) | | Returns whether data keys can be derived from the value/entity binding
of this view, which determines whether a value/entity object alone is
sufficient for operations that require keys.
|
| getCurrentTxn | | CurrentTransaction getCurrentTxn()(Code) | | Returns the current transaction for the view or null if the environment
is non-transactional.
|
| getSingleKeyThang | | DatabaseEntry getSingleKeyThang()(Code) | | Returns the key thang for a single key range, or null if a single key
range is not used.
|
| isSecondary | | final boolean isSecondary()(Code) | | Returns whether this is a view on a secondary database rather
than directly on a primary database.
|
| keySetView | | DataView keySetView()(Code) | | Return a new key-set view derived from this view by setting the
entity and value binding to null.
the derived view. |
| useSubRange | | KeyRange useSubRange() throws DatabaseException(Code) | | Returns the range to use for sub-ranges. Returns range if this is not a
dupsView, or the dupsRange if this is a dupsView, creating dupsRange if
necessary.
|
| useTransaction | | Transaction useTransaction()(Code) | | Returns the current transaction if the database is transaction, or null
if the database is not transactional or there is no current transaction.
|
| valueSetView | | DataView valueSetView()(Code) | | Return a new value-set view derived from this view by setting the
key binding to null.
the derived view. |
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