net.quasardb.qdb.ts

Class Value

java.lang.Object

net.quasardb.qdb.ts.Value

All Implemented Interfaces:

Serializable

public class Value
extends Object
implements Serializable

Represents a timeseries value.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Value.Type

Constructor Summary

Constructors

Modifier	Constructor and Description
	Value()
protected	Value(Value.Type type)

Method Summary

Modifier and Type	Method and Description
static Value	createBlob(byte[] value) Represents a blob value.
static Value	createBlob(ByteBuffer value) Represents blob value.
static Value	createDouble(double value) Represents a double value.
static Value	createInt64(long value) Represents a long integer
static Value	createNull() Create a null / empty value.
static Value	createSafeBlob(byte[] value) Represents a safe blob value that copies the byte array.
static Value	createSafeBlob(ByteBuffer value) Creates a copy of a ByteBuffer into this Value.
static Value	createString(String value) Create a new String value.
static Value	createTimestamp(Timespec value) Represents a timestamp
Value	ensureByteBufferBackedString() If this Value's type is a string, ensures that it creates a directly allocated ByteBuffer with a copy of the UTF-8 string representation.
boolean	equals(Object obj)
ByteBuffer	getBlob()
double	getDouble()
long	getInt64()
String	getString()
Timespec	getTimestamp()
Value.Type	getType()
boolean	isNull() Returns true if this value is null.
void	setBlob(byte[] value) Updates value to take a certain blob value.
void	setBlob(ByteBuffer value) Updates value to take a certain blob value;
void	setDouble(double value) Updates value to take a certain double value;
void	setInt64(long value) Updates value to take a certain long integer value;
void	setNative(long batchTable, Value.Type columnType, int offset)
void	setNull() Updates value to represent an unintialised value.
void	setSafeBlob(byte[] value) Updates value to take a certain blob value.
void	setSafeBlob(ByteBuffer value) Updates value to take a certain blob value.
void	setString(String value) Update this value to be a String.
void	setTimestamp(Timespec value) Updates value to take a certain timestamp;
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Value

public Value()

Value

protected Value(Value.Type type)

Method Detail

createNull

public static Value createNull()

Create a null / empty value.

setNative

public void setNative(long batchTable,
                      Value.Type columnType,
                      int offset)

setNull

public void setNull()

Updates value to represent an unintialised value.

isNull

public boolean isNull()

Returns true if this value is null.

createInt64

public static Value createInt64(long value)

Represents a long integer

setInt64

public void setInt64(long value)

Updates value to take a certain long integer value;

createDouble

public static Value createDouble(double value)

Represents a double value.

setDouble

public void setDouble(double value)

Updates value to take a certain double value;

createTimestamp

public static Value createTimestamp(Timespec value)

Represents a timestamp

setTimestamp

public void setTimestamp(Timespec value)

Updates value to take a certain timestamp;

createBlob

public static Value createBlob(byte[] value)

Represents a blob value. Warning: assumes byte array will stay in memory for as long as this object lives.

createBlob

public static Value createBlob(ByteBuffer value)

Represents blob value. Warning: assumes bytebuffer will stay in memory for as long as this object lives.

setBlob

public void setBlob(byte[] value)

Updates value to take a certain blob value. Warning: assumes byte array will stay in memory for as long as this object lives.

setBlob

public void setBlob(ByteBuffer value)

Updates value to take a certain blob value;

setSafeBlob

public void setSafeBlob(byte[] value)

Updates value to take a certain blob value. Will create a copy of the byte array.

setSafeBlob

public void setSafeBlob(ByteBuffer value)

Updates value to take a certain blob value. Will create copy of the byte array.

createSafeBlob

public static Value createSafeBlob(byte[] value)

Represents a safe blob value that copies the byte array.

createSafeBlob

public static Value createSafeBlob(ByteBuffer value)

Creates a copy of a ByteBuffer into this Value.

setString

public void setString(String value)

Update this value to be a String.

createString

public static Value createString(String value)

Create a new String value.

Parameters:

value - String representation of value.

ensureByteBufferBackedString

public Value ensureByteBufferBackedString()

If this Value's type is a string, ensures that it creates a directly allocated ByteBuffer with a copy of the UTF-8 string representation. Because this implies that the String is then represented as a direct ByteBuffer with a 'stable' memory region behind it, it'll allow us to use this buffer in native code safely for extended periods of time without requiring a copy.

Returns:

Returns this value.

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

getType

public Value.Type getType()

getInt64

public long getInt64()

getDouble

public double getDouble()

getTimestamp

public Timespec getTimestamp()

getBlob

public ByteBuffer getBlob()

getString

public String getString()

toString

public String toString()

Overrides:

toString in class Object