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Oracle NoSQL Database version 11gR2.2.0.26 |
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java.lang.Object oracle.kv.KeyRange
public class KeyRange
Defines a range of Key components for use in multiple-key operations and iterations.
The KeyRange defines a range of String values for the key components immediately following the last component of a parent key that is used in a multiple-key operation. In terms of a tree structure, the range defines the parent key's immediate children that are selected by the multiple-key operation.
Constructor Summary | |
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KeyRange(String prefix)
Creates a prefix KeyRange. |
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KeyRange(String start,
boolean startInclusive,
String end,
boolean endInclusive)
Creates a start/end KeyRange. |
Method Summary | |
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boolean |
equals(Object other)
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static KeyRange |
fromByteArray(byte[] keyBytes)
Deserializes the given bytes that were returned earlier by toByteArray() and returns the resulting KeyRange. |
static KeyRange |
fromString(String keyRangeStringArg)
Converts an encoded KeyRange back to a KeyRange. |
String |
getEnd()
Returns the String component that defines upper bound of the key range, or null if no upper bound is enforced. |
boolean |
getEndInclusive()
Returns whether end is included in the range, i.e., end is greater than or equal to the last String component in the key range. |
String |
getStart()
Returns the String component that defines lower bound of the key range, or null if no lower bound is enforced. |
boolean |
getStartInclusive()
Returns whether start is included in the range, i.e., start is less than or equal to the first String component in the key range. |
int |
hashCode()
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boolean |
inRange(Key parentKey,
Key checkKey)
Returns true if a Key is within the bounds of this range with respect to a parent Key. |
boolean |
isPrefix()
Returns whether this is a prefix range, i.e., whether start and end are equal and both inclusive. |
byte[] |
toByteArray()
Returns this KeyRange as a serialized byte array, such that fromByteArray(byte[]) may be used to reconstitute the KeyRange. |
String |
toString()
Encodes the KeyRange object and returns the resulting String which can later be decoded using fromString(java.lang.String) . |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Methods inherited from interface oracle.kv.impl.util.FastExternalizable |
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writeFastExternal |
Constructor Detail |
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public KeyRange(String start, boolean startInclusive, String end, boolean endInclusive)
start
- is the String component that defines lower bound of the key
range. If null, no lower bound is enforced.startInclusive
- is true if start is included in the range, i.e.,
start is less than or equal to the first String component in the key
range.end
- is the String component that defines upper bound of the key
range. If null, no upper bound is enforced.endInclusive
- is true if end is included in the range, i.e., end
is greater than or equal to the last String component in the key range.
IllegalArgumentException
- if either start and end are null or
start is not less than end.public KeyRange(String prefix)
Using this constructor to define a prefix range is equivalent to
using the KeyRange(String, boolean, String, boolean)
constructor as follows: KeyRange(prefix, true, prefix, true)
prefix
- is the String component that defines both the lower and
upper inclusive bounds of the key range.Method Detail |
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public byte[] toByteArray()
fromByteArray(byte[])
may be used to reconstitute the KeyRange.
public static KeyRange fromByteArray(byte[] keyBytes)
toByteArray()
and returns the resulting KeyRange.
public String getStart()
public boolean getStartInclusive()
public String getEnd()
public boolean getEndInclusive()
public boolean isPrefix()
public boolean inRange(Key parentKey, Key checkKey)
parentKey
- the parent of the key range, or null to check the first
key component.checkKey
- the full key being checked.
public boolean equals(Object other)
equals
in class Object
public int hashCode()
hashCode
in class Object
public String toString()
fromString(java.lang.String)
. The format is:
<startType>/<start>/<end>/<endType>
where the startType/endType
is either "I"
or "E"
for Inclusive or Exclusive and start
and end
are the start/end key strings. The leading
startType/start
specification is omitted from the String
representation if the range does not have a lower bound. Similarly, the
trailing end/endType
specification is omitted if the range
does not have an upper bound. Since a KeyRange
requires at
least one bound, at least one of the specifications is always present in
the String representation. Here are some examples:
alpha
inclusive
to beta
exclusive0123
inclusivechi
inclusive to infinitychi
exclusive
toString
in class Object
public static KeyRange fromString(String keyRangeStringArg)
toString()
. See toString()
for more information about the KeyRange String format.
keyRangeStringArg
- a non null KeyRange encoding string, which
should normally be created using toString()
.
IllegalArgumentException
- if keyRangeStringArg does not contain
a valid KeyRange encoding.
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Oracle NoSQL Database version 11gR2.2.0.26 |
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