public class LongKey extends KeyObject
LongKey
defines a key based on the long
type.KeyObject
,
ObjectIndex
,
Serialized FormConstructor and Description |
---|
LongKey()
Creates a blank
LongKey (value = 0). |
LongKey(long key_value)
Creates a new
LongKey with a specific value. |
Modifier and Type | Method and Description |
---|---|
int |
compareTo(KeyObject key)
Compares the invoking
LongKey to key , returning one of the
KEY_* constants based on the relationship of the two keys. |
int |
hashCode()
Returns a hash code value for the object, which is, in effect, the
the value of the key.
|
long |
longValue()
Returns the
long value of a LongKey . |
KeyObject |
makeNullKey()
Returns a "null" (i.e., blank)
LongKey , to be used as a space-holder in certain kinds of
ObjectIndexes . |
void |
readExternal(java.io.ObjectInput in)
LongKey implements the readExternal method to restore its contents. |
java.lang.String |
toString()
Returns the
String representation of a LongKey . |
void |
writeExternal(java.io.ObjectOutput out)
LongKey implements the writeExternal method to save its
contents. |
public LongKey(long key_value)
LongKey
with a specific value.keyValue
- value of the newly-created key.public LongKey()
LongKey
(value = 0).public int compareTo(KeyObject key)
LongKey
to key
, returning one of the
KEY_*
constants based on the relationship of the two keys.
public KeyObject makeNullKey()
LongKey
, to be used as a space-holder in certain kinds of
ObjectIndexes
. The "null" value is 0xFFFFFFFFFFFFFFFF (all ones).makeNullKey
in class KeyObject
LongKey
constant.BTreeIndex
public void writeExternal(java.io.ObjectOutput out) throws java.io.IOException
LongKey
implements the writeExternal
method to save its
contents.java.io.IOException
public void readExternal(java.io.ObjectInput in) throws java.io.IOException, java.lang.ClassNotFoundException
LongKey
implements the readExternal method to restore its contents.java.io.IOException
java.lang.ClassNotFoundException
public long longValue()
long
value of a LongKey
.long
value of a LongKey
.public java.lang.String toString()
String
representation of a LongKey
.public int hashCode()
hashCode
in class java.lang.Object
Object
,
HashIndex