tuwien.auto.calimero.dptxlator
Class DPTXlatorString

java.lang.Object
  tuwien.auto.calimero.dptxlator.DPTXlator
      tuwien.auto.calimero.dptxlator.DPTXlatorString

public class DPTXlatorString
extends DPTXlator

Translator for KNX DPTs with main number 16, type string.

The KNX data type width is 14 bytes.
The default return value after creation is the empty string "" or 14 bytes filled with NULL (ASCII code 0).
Characters not supported by the selected character set are silently replaced with the question mark character, '?'.
On supplying string items for translation, strings are limited to a maximum length of 14 characters. Exceeding this maximum string length will result in a KNXFormatException.

Field Summary

static DPT	DPT_STRING_8859_1 DPT ID 16.001, ISO-8859-1 string (Latin 1); 8 Bit character set encoding.
static DPT	DPT_STRING_ASCII DPT ID 16.000, ASCII string; 7 Bit character set encoding.

Fields inherited from class tuwien.auto.calimero.dptxlator.DPTXlator

appendUnit, data, dpt, LOG_SERVICE, logger, typeSize

Constructor Summary

DPTXlatorString(DPT dpt)
Creates a translator for the given datapoint type.

DPTXlatorString(java.lang.String dptID)
Creates a translator for the given datapoint type ID.

Method Summary

java.lang.String[]	getAllValues() Returns all translation items as strings currently contained in this translator.
byte[]	getData(byte[] dst, int offset) Copies KNX DPT value items stored by this translator into dst, starting at offset.
java.util.Map	getSubTypes() Returns all available, implemented subtypes for the translator.
protected static java.util.Map	getSubTypesStatic()
void	setData(byte[] data, int offset) Sets the data array with KNX datapoint type items for translation.
protected void	toDPT(java.lang.String value, short[] dst, int index) Translates a string value representation into KNX data type according the current DPT and stores the result into dst.

Methods inherited from class tuwien.auto.calimero.dptxlator.DPTXlator

getData, getItems, getType, getTypeSize, getValue, setAppendUnit, setData, setTypeID, setValue, setValues, toString

Methods inherited from class java.lang.Object

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

Field Detail

DPT_STRING_8859_1

public static final DPT DPT_STRING_8859_1

DPT ID 16.001, ISO-8859-1 string (Latin 1); 8 Bit character set encoding.

DPT_STRING_ASCII

public static final DPT DPT_STRING_ASCII

DPT ID 16.000, ASCII string; 7 Bit character set encoding.

Constructor Detail

DPTXlatorString

public DPTXlatorString(DPT dpt)
                throws KNXFormatException

Creates a translator for the given datapoint type.

Parameters:

dpt - the requested datapoint type

Throws:

KNXFormatException - on not supported or not available DPT

DPTXlatorString

public DPTXlatorString(java.lang.String dptID)
                throws KNXFormatException

Creates a translator for the given datapoint type ID.

Parameters:

dptID - available implemented datapoint type ID

Throws:

KNXFormatException - on wrong formatted or not expected (available) dptID

Method Detail

getAllValues

public java.lang.String[] getAllValues()

Description copied from class: DPTXlator

Returns all translation items as strings currently contained in this translator.

The items are ordered the same way handed to the translator in the first place (FIFO, increasing byte index).

Specified by:

getAllValues in class DPTXlator

Returns:

an array of strings with values represented as strings

See Also:

DPTXlator.getValue()

getData

public byte[] getData(byte[] dst,
                      int offset)

Description copied from class: DPTXlator

Copies KNX DPT value items stored by this translator into dst, starting at offset.

The number of items copied depends on the usable dst range, i.e. how much items completely fit into dst.length - offset. If the usable range is too short, no item is copied at all, and dst is not modified.
Datapoint types shorter than 1 bytes only change the affected lower bit positions, leaving the upper (high) bits of dst bytes untouched.

Specified by:

getData in class DPTXlator

Parameters:

dst - byte array for storing DPT values

offset - offset into dst from where to start, 0 <= offset < dst.length

Returns:

dst

getSubTypes

public final java.util.Map getSubTypes()

Description copied from class: DPTXlator

Returns all available, implemented subtypes for the translator.

A subtype, identified through a sub number, specifies the available dimension, consisting of range and unit attributes. Together with the main type information this uniquely defines a datapoint type.
The datapoint type information is contained in a DPT object.

New or modified DPT information can be made available to the translator by adding entries to the map, likewise map entries might be removed. In other words, the map returned is the same used by the translators of one main type for DPT lookup. Changes to the map influence all translators of the same main type.
Changes of the DPT currently used by the translator take effect on the next new translator created using that DPT.
The map itself is not synchronized.

Specified by:

getSubTypes in class DPTXlator

Returns:

subtypes as Map, key is the subtype ID of type string, value of type DPT

getSubTypesStatic

protected static java.util.Map getSubTypesStatic()

Returns:

the subtypes of the string translator type

See Also:

DPTXlator.getSubTypesStatic()

setData

public void setData(byte[] data,
                    int offset)

Description copied from class: DPTXlator

Sets the data array with KNX datapoint type items for translation.

The data array contains at least one DPT item, the new item(s) will replace any other items set in the translator before.
The number of items (KNX data values) for translation in data is inferred from the length of the usable data range:
items = (data.length - offset) / (length of KNX data type)

In general, the KNX data type width is implicitly known in the context where a translator is invoked (e.g. by appropriate DP configuration), therefore data.length will satisfy the minimum acceptable length. If this is not the case, KNXIllegalArgumentException has to be caught and handled in the caller's context.

Specified by:

setData in class DPTXlator

Parameters:

data - byte array containing KNX DPT item(s)

offset - offset into data from where to start, 0 <= offset < data.length

toDPT

protected void toDPT(java.lang.String value,
                     short[] dst,
                     int index)
              throws KNXFormatException

Description copied from class: DPTXlator

Translates a string value representation into KNX data type according the current DPT and stores the result into dst. The index parameter specifies the item index of the value. The translated KNX data is stored at the corresponding array offset in dst. Calculation of offset: offset = index * KNX data type size.

Specified by:

toDPT in class DPTXlator

Parameters:

value - value to translate

dst - destination array for resulting KNX data

index - item index in destination array

Throws:

KNXFormatException - if value can't be translated due to wrong formatted content, or if valuedoesn't fit into KNX data type