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java.lang.Objectcom.sleepycat.bind.tuple.TupleBase
com.sleepycat.bind.tuple.TupleBinding
public abstract class TupleBinding
An abstract EntryBinding that treats a key or data entry as a
tuple; it includes predefined bindings for Java primitive types.
This class takes care of converting the entries to/from TupleInput and TupleOutput objects. Its two abstract methods must
be implemented by a concrete subclass to convert between tuples and key or
data objects.
For key or data entries which are Java primitive classes (String,
Integer, etc) getPrimitiveBinding(java.lang.Class) may be used to return a built in
tuple binding. A custom tuple binding for these types is not needed.
Note: getPrimitiveBinding(java.lang.Class) returns bindings that do not
sort negative floating point numbers correctly by default. See SortedFloatBinding and SortedDoubleBinding for details.
When a tuple binding is used as a key binding, it produces key values
with a reasonable default sort order. For more information on the default
sort order, see TupleOutput.
| Constructor Summary | |
|---|---|
TupleBinding()
Creates a tuple binding. |
|
| Method Summary | |
|---|---|
Object |
entryToObject(DatabaseEntry entry)
Converts a entry buffer into an Object. |
abstract Object |
entryToObject(TupleInput input)
Constructs a key or data object from a TupleInput entry. |
static TupleBinding |
getPrimitiveBinding(Class cls)
Creates a tuple binding for a primitive Java class. |
void |
objectToEntry(Object object,
DatabaseEntry entry)
Converts an Object into a entry buffer. |
abstract void |
objectToEntry(Object object,
TupleOutput output)
Converts a key or data object to a tuple entry. |
| Methods inherited from class com.sleepycat.bind.tuple.TupleBase |
|---|
entryToInput, getTupleBufferSize, getTupleOutput, inputToEntry, newOutput, newOutput, outputToEntry, setTupleBufferSize |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public TupleBinding()
| Method Detail |
|---|
public Object entryToObject(DatabaseEntry entry)
EntryBinding
entryToObject in interface EntryBindingentry - is the source entry buffer.
public void objectToEntry(Object object,
DatabaseEntry entry)
EntryBinding
objectToEntry in interface EntryBindingobject - is the source Object.entry - is the destination entry buffer.public abstract Object entryToObject(TupleInput input)
TupleInput entry.
input - is the tuple key or data entry.
public abstract void objectToEntry(Object object,
TupleOutput output)
object - is the key or data object.output - is the tuple entry to which the key or data should be
written.public static TupleBinding getPrimitiveBinding(Class cls)
StringCharacterBooleanByteShortIntegerLongFloatDoubleNote: getPrimitiveBinding(java.lang.Class) returns bindings that do
not sort negative floating point numbers correctly by default. See
SortedFloatBinding and SortedDoubleBinding for
details.
cls - is the primitive Java class.
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