com.sleepycat.db

Class MultipleKeyDataEntry

java.lang.Object

com.sleepycat.db.DatabaseEntry

com.sleepycat.db.MultipleEntry

com.sleepycat.db.MultipleKeyDataEntry

public class MultipleKeyDataEntry
extends MultipleEntry

A DatabaseEntry that holds multiple key/data pairs returned by a single Database or Cursor get call.

Constructor Summary

Constructors

Constructor and Description
MultipleKeyDataEntry() Construct an entry with no data.
MultipleKeyDataEntry(byte[] data) Construct an entry with a given byte array.
MultipleKeyDataEntry(byte[] data, int offset, int size) Constructs a DatabaseEntry with a given byte array, offset and size.

Method Summary

Modifier and Type	Method and Description
boolean	append(byte[] key, byte[] data) Append an entry to the bulk buffer.
boolean	append(byte[] key, int koff, int klen, byte[] data, int doff, int dlen) Append an entry to the bulk buffer.
boolean	append(DatabaseEntry key, DatabaseEntry data) Append an entry to the bulk buffer.
boolean	next(DatabaseEntry key, DatabaseEntry data) Get the next key/data pair in the returned set.

Methods inherited from class com.sleepycat.db.MultipleEntry

append_internal, append_internal, setUserBuffer

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

Constructor Detail

MultipleKeyDataEntry

public MultipleKeyDataEntry()

Construct an entry with no data. The object must be configured before use with the MultipleEntry.setUserBuffer method.

MultipleKeyDataEntry

public MultipleKeyDataEntry(byte[] data)

Construct an entry with a given byte array. The offset is set to zero; the size is set to the length of the array. If null is passed, the object must be configured before use with the MultipleEntry.setUserBuffer method.

Parameters:

data - Byte array wrapped by the entry.

MultipleKeyDataEntry

public MultipleKeyDataEntry(byte[] data,
                            int offset,
                            int size)

Constructs a DatabaseEntry with a given byte array, offset and size.

Parameters:

data - Byte array wrapped by the DatabaseEntry.

offset - Offset in the first byte in the byte array to be included.

size - Number of bytes in the byte array to be included.

Method Detail

next

public boolean next(DatabaseEntry key,
                    DatabaseEntry data)

Get the next key/data pair in the returned set. This method may only be called after a successful call to a Database or Cursor get method with this object as the data parameter.

Parameters:

key - an entry that is set to refer to the next key element in the returned set.

data - an entry that is set to refer to the next data element in the returned set.

Returns:

indicates whether a value was found. A return of false indicates that the end of the set was reached.

append

public boolean append(byte[] key,
                      int koff,
                      int klen,
                      byte[] data,
                      int doff,
                      int dlen)
               throws DatabaseException

Append an entry to the bulk buffer.

Parameters:

key - an array containing the key to be added.

koff - the position in the key array where the record starts.

klen - the length of the record, in bytes, to be copied from the key array.

data - an array containing the value to be added.

doff - the position in the data array where the record starts.

dlen - the length of the record, in bytes, to be copied from the data array.

Returns:

indicates whether there was space. A return of false indicates that the specified entry could not fit in the buffer.

Throws:

DatabaseException - if a failure occurs.

append

public boolean append(DatabaseEntry key,
                      DatabaseEntry data)
               throws DatabaseException

Append an entry to the bulk buffer.

Parameters:

key - the key to be appended, using the offset and size specified in the DatabaseEntry.

data - the value to be appended, using the offset and size specified in the DatabaseEntry.

Returns:

indicates whether there was space. A return of false indicates that the specified entry could not fit in the buffer.

Throws:

DatabaseException - if a failure occurs.

append

public boolean append(byte[] key,
                      byte[] data)
               throws DatabaseException

Append an entry to the bulk buffer.

Parameters:

key - an array containing the key to be added.

data - an array containing the value to be added.

Returns:

indicates whether there was space. A return of false indicates that the specified entry could not fit in the buffer.

Throws:

DatabaseException - if a failure occurs.