Package com.sleepycat.db

Class MultipleEntry

java.lang.Object

com.sleepycat.db.DatabaseEntry

com.sleepycat.db.MultipleEntry

Direct Known Subclasses:

MultipleDataEntry, MultipleKeyDataEntry, MultipleKeyNIODataEntry, MultipleNIODataEntry, MultipleRecnoDataEntry, MultipleRecnoNIODataEntry

public abstract class MultipleEntry
extends DatabaseEntry

An abstract class representing a DatabaseEntry that holds multiple results returned by a single Cursor get method. Use one of the concrete subclasses depending on whether you need:

• multiple data items only: MultipleDataEntry
• multiple key / data item pairs: MultipleKeyDataEntry
• multiple record number / data item pairs: MultipleRecnoDataEntry

Method Summary

Modifier and Type	Method	Description
protected boolean	append_internal(byte[] newdata, int offset, int len)
protected boolean	append_internal(byte[] newdata, int offset, int len, int recno)
void	setUserBuffer(int length, boolean usermem)	Configures the entry with an application-owned buffer.

Methods inherited from class com.sleepycat.db.DatabaseEntry

equals, getBlob, getData, getDataNIO, getExternalFile, getOffset, getPartial, getPartialLength, getPartialOffset, getReadOnly, getRecordNumber, getReuseBuffer, getSize, getUserBuffer, getUserBufferLength, hashCode, setBlob, setData, setData, setDataNIO, setDataNIO, setExternalFile, setOffset, setPartial, setPartial, setPartialLength, setPartialOffset, setReadOnly, setRecordNumber, setReuseBuffer, setSize

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Method Detail

setUserBuffer

public void setUserBuffer(int length,
                          boolean usermem)

Description copied from class: DatabaseEntry

Configures the entry with an application-owned buffer.

The data field of the entry must refer to a buffer that is at least length bytes in length.

If the length of the requested item is less than or equal to that number of bytes, the item is copied into the memory to which the data field refers. Otherwise, the size field is set to the length needed for the requested item, and a MemoryException is thrown.

Applications can determine the length of a record by setting length to 0 and calling DatabaseEntry.getSize on the return value.

Overrides:

setUserBuffer in class DatabaseEntry

Parameters:

length - the length of the buffer

usermem - whether the buffer is owned by the application

append_internal

protected boolean append_internal(byte[] newdata,
                                  int offset,
                                  int len,
                                  int recno)
                           throws DatabaseException

Throws:

DatabaseException

append_internal

protected boolean append_internal(byte[] newdata,
                                  int offset,
                                  int len)
                           throws DatabaseException

Throws:

DatabaseException