org.rrd4j.core

Class RrdPrimitive<U extends RrdUpdater<U>>

java.lang.Object

org.rrd4j.core.RrdPrimitive<U>

Type Parameters:

U - The type of RrdUpdater this primitive belongs to

Direct Known Subclasses:

RrdDouble, RrdDoubleArray, RrdDoubleMatrix, RrdEnum, RrdInt, RrdLong, RrdString

abstract class RrdPrimitive<U extends RrdUpdater<U>>
extends Object

Abstract base class for all RRD primitive data types.

This class provides the foundation for storing different types of primitive data (int, long, double, string) in RRD files. It handles the low-level operations of reading and writing bytes to the backend storage, with support for caching and different data type sizes.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static int	RRD_DOUBLE Type identifier for double RRD primitives.
(package private) static int	RRD_INT Type identifier for integer RRD primitives.
(package private) static int	RRD_LONG Type identifier for long RRD primitives.
(package private) static int[]	RRD_PRIM_SIZES Array containing the size in bytes for each RRD primitive type.
(package private) static int	RRD_STRING Type identifier for string RRD primitives.
(package private) static int	STRING_LENGTH Maximum length of string values stored in RRD primitives.

Constructor Summary

Constructors

Constructor and Description
RrdPrimitive(RrdUpdater<U> updater, int type, boolean isConstant)
RrdPrimitive(RrdUpdater<U> updater, int type, int count, boolean isConstant)

Method Summary

Modifier and Type	Method and Description
(package private) boolean	isCachingAllowed() Checks if caching is allowed for this primitive.
(package private) byte[]	readBytes()
(package private) double	readDouble()
(package private) double	readDouble(int index)
(package private) double[]	readDouble(int index, int count)
protected <E extends Enum<E>> E	readEnum(Class<E> clazz)
(package private) int	readInt()
(package private) long	readLong()
(package private) String	readString()
(package private) void	writeBytes(byte[] b)
(package private) void	writeDouble(double value)
(package private) void	writeDouble(int index, double value)
(package private) void	writeDouble(int index, double[] values)
(package private) void	writeDouble(int index, double value, int count)
protected <E extends Enum<E>> void	writeEnum(E value)
(package private) void	writeInt(int value)
(package private) void	writeLong(long value)
(package private) void	writeString(String value)

Methods inherited from class java.lang.Object

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

Field Detail

RRD_DOUBLE

static final int RRD_DOUBLE

Type identifier for double RRD primitives.

See Also:

Constant Field Values

RRD_INT

static final int RRD_INT

Type identifier for integer RRD primitives.

See Also:

Constant Field Values

RRD_LONG

static final int RRD_LONG

Type identifier for long RRD primitives.

See Also:

Constant Field Values

RRD_PRIM_SIZES

static final int[] RRD_PRIM_SIZES

Array containing the size in bytes for each RRD primitive type. Index corresponds to the type constants (RRD_INT, RRD_LONG, RRD_DOUBLE, RRD_STRING).

RRD_STRING

static final int RRD_STRING

Type identifier for string RRD primitives.

See Also:

Constant Field Values

STRING_LENGTH

static final int STRING_LENGTH

Maximum length of string values stored in RRD primitives.

See Also:

Constant Field Values

Constructor Detail

RrdPrimitive

RrdPrimitive(RrdUpdater<U> updater,
             int type,
             boolean isConstant)

RrdPrimitive

RrdPrimitive(RrdUpdater<U> updater,
             int type,
             int count,
             boolean isConstant)

Method Detail

isCachingAllowed

final boolean isCachingAllowed()

Checks if caching is allowed for this primitive.

Returns:

true if caching is allowed, false otherwise

readBytes

final byte[] readBytes()
                throws IOException

Throws:

IOException

readDouble

final double readDouble()
                 throws IOException

Throws:

IOException

readDouble

final double readDouble(int index)
                 throws IOException

Throws:

IOException

readDouble

final double[] readDouble(int index,
                          int count)
                   throws IOException

Throws:

IOException

readEnum

protected final <E extends Enum<E>> E readEnum(Class<E> clazz)
                                        throws IOException

Throws:

IOException

readInt

final int readInt()
           throws IOException

Throws:

IOException

readLong

final long readLong()
             throws IOException

Throws:

IOException

readString

final String readString()
                 throws IOException

Throws:

IOException

writeBytes

final void writeBytes(byte[] b)
               throws IOException

Throws:

IOException

writeDouble

final void writeDouble(double value)
                throws IOException

Throws:

IOException

writeDouble

final void writeDouble(int index,
                       double value)
                throws IOException

Throws:

IOException

writeDouble

final void writeDouble(int index,
                       double[] values)
                throws IOException

Throws:

IOException

writeDouble

final void writeDouble(int index,
                       double value,
                       int count)
                throws IOException

Throws:

IOException

writeEnum

protected final <E extends Enum<E>> void writeEnum(E value)
                                            throws IOException

Throws:

IOException

writeInt

final void writeInt(int value)
             throws IOException

Throws:

IOException

writeLong

final void writeLong(long value)
              throws IOException

Throws:

IOException

writeString

final void writeString(String value)
                throws IOException

Throws:

IOException