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java.lang.Object com.sleepycat.bind.tuple.TupleBase<E> com.sleepycat.bind.tuple.TupleBinding<Double> com.sleepycat.bind.tuple.SortedDoubleBinding
public class SortedDoubleBinding
A concrete TupleBinding
for a Double
primitive
wrapper or a double
primitive.
This class produces byte array values that by default (without a custom
comparator) sort correctly, including sorting of negative values.
Therefore, this class should normally be used instead of DoubleBinding
which does not by default support sorting of negative values.
Please note that:
DoubleBinding
and
SortedDoubleBinding
are different and incompatible. They are not
interchangeable once data has been stored.DoubleBinding
, not SortedDoubleBinding
,
is returned by TupleBinding.getPrimitiveBinding(java.lang.Class)
method. Therefore,
to use SortedDoubleBinding
, TupleBinding.getPrimitiveBinding(java.lang.Class)
should not be called.There are two ways to use this class:
com.sleepycat.db
package directly, the static
methods in this class can be used to convert between primitive values and
DatabaseEntry
objects.com.sleepycat.collections
package, an instance of
this class can be used with any stored collection.
Constructor Summary | |
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SortedDoubleBinding()
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Method Summary | |
---|---|
static void |
doubleToEntry(double val,
DatabaseEntry entry)
Converts a simple double value into an entry buffer. |
static double |
entryToDouble(DatabaseEntry entry)
Converts an entry buffer into a simple double value. |
Double |
entryToObject(TupleInput input)
Constructs a key or data object from a TupleInput entry. |
void |
objectToEntry(Double object,
TupleOutput output)
Converts a key or data object to a tuple entry. |
Methods inherited from class com.sleepycat.bind.tuple.TupleBinding |
---|
entryToObject, getPrimitiveBinding, objectToEntry |
Methods inherited from class com.sleepycat.bind.tuple.TupleBase |
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entryToInput, getTupleBufferSize, inputToEntry, newOutput, newOutput, outputToEntry, setTupleBufferSize |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public SortedDoubleBinding()
Method Detail |
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public Double entryToObject(TupleInput input)
TupleBinding
TupleInput
entry.
entryToObject
in class TupleBinding<Double>
input
- is the tuple key or data entry.
public void objectToEntry(Double object, TupleOutput output)
TupleBinding
objectToEntry
in class TupleBinding<Double>
object
- is the key or data object.output
- is the tuple entry to which the key or data should be
written.public static double entryToDouble(DatabaseEntry entry)
double
value.
entry
- is the source entry buffer.
public static void doubleToEntry(double val, DatabaseEntry entry)
double
value into an entry buffer.
val
- is the source value.entry
- is the destination entry buffer.
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