Package org.epics.vtype

Class ValueFormat

java.lang.Object

java.text.Format

org.epics.vtype.ValueFormat

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

SimpleValueFormat

public abstract class ValueFormat
extends Format

Formats a data type to a String representation. This class provide default implementations that can format scalars and arrays to an arbitrary precision and a maximum number of array elements.

Author:

carcassi

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.text.Format

Format.Field

Constructor Summary

Constructors

Constructor	Description
ValueFormat()

Method Summary

Modifier and Type	Method	Description
StringBuffer	format(Object data, StringBuffer toAppendTo, FieldPosition pos)	Formats the given data object.
String	format(Array array)	Formats an array.
protected abstract StringBuffer	format(Array array, StringBuffer toAppendTo, FieldPosition pos)	Formats an array.
String	format(Scalar scalar)	Formats an scalar.
protected abstract StringBuffer	format(Scalar scalar, StringBuffer toAppendTo, FieldPosition pos)	Formats a scalar.
NumberFormat	getNumberFormat()	Returns the NumberFormat used to format the numeric values.
byte	parseByte(String source)	Parses the string and returns a byte representation.
org.epics.util.array.ListByte	parseByteArray(String source)	Parses the string and returns a byte array representation.
double	parseDouble(String source)	Parses the string and returns a double representation.
org.epics.util.array.ListDouble	parseDoubleArray(String source)	Parses the string and returns a double array representation.
int	parseEnum(String source, List<String> labels)	Parses the string and returns the index in the enum.
org.epics.util.array.ListInteger	parseEnumArray(String source, List<String> labels)	Parses the string and returns an array of indexes in the enum.
float	parseFloat(String source)	Parses the string and returns a float representation.
org.epics.util.array.ListFloat	parseFloatArray(String source)	Parses the string and returns a float array representation.
int	parseInt(String source)	Parses the string and returns an integer representation.
org.epics.util.array.ListInteger	parseIntArray(String source)	Parses the string and returns an int array representation.
Object	parseObject(String source, ParsePosition pos)
Object	parseObject(String source, VType reference)	Parses the string given the object as a reference.
short	parseShort(String source)	Parses the string and returns a short representation.
org.epics.util.array.ListShort	parseShortArray(String source)	Parses the string and returns a short array representation.
String	parseString(String source)	Parses the string and returns a string representation.
List<String>	parseStringArray(String source)	Parses the string and returns a string array representation.
void	setNumberFormat(NumberFormat numberFormat)	Changes the NumberFormat used to format the numeric values.

Methods inherited from class java.text.Format

clone, format, formatToCharacterIterator, parseObject

Methods inherited from class java.lang.Object

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

Constructor Detail

ValueFormat

public ValueFormat()

Method Detail

format

public StringBuffer format(Object data,
                           StringBuffer toAppendTo,
                           FieldPosition pos)

Formats the given data object. For scalars and arrays redirects to the appropriate methods. For anything else uses Object.toString().

Specified by:

format in class Format

Parameters:

data - data object to format

Returns:

a String representation

format

public String format(Scalar scalar)

Formats an scalar.

Parameters:

scalar - data object to format

Returns:

a String representation

format

public String format(Array array)

Formats an array.

Parameters:

array - data object to format

Returns:

a String representation

format

protected abstract StringBuffer format(Scalar scalar,
                                       StringBuffer toAppendTo,
                                       FieldPosition pos)

Formats a scalar.

Parameters:

scalar - data object to format

toAppendTo - output buffer

pos - the field position

Returns:

the output buffer

format

protected abstract StringBuffer format(Array array,
                                       StringBuffer toAppendTo,
                                       FieldPosition pos)

Formats an array.

Parameters:

array - data object to format

toAppendTo - output buffer

pos - the field position

Returns:

the output buffer

getNumberFormat

public NumberFormat getNumberFormat()

Returns the NumberFormat used to format the numeric values. If null, it will use the NumberFormat from the value Display.

Returns:

a NumberFormat

setNumberFormat

public void setNumberFormat(NumberFormat numberFormat)

Changes the NumberFormat used to format the numeric values. If null, it will use the NumberFormat from the value Display.

Parameters:

numberFormat - a NumberFormat

parseObject

public Object parseObject(String source,
                          ParsePosition pos)

Specified by:

parseObject in class Format

parseObject

public Object parseObject(String source,
                          VType reference)

Parses the string given the object as a reference.

This function will parse the string based on the object provided as a reference (e.g. if reference is a VDouble, it will parse the string as a double). The data in the reference will also be used for the actual parsing (e.g. if reference is Enum, the labels will be used to match the string).

Parameters:

source - the text to parse

reference - the vtype object to reference

Returns:

the parsed representation

parseDouble

public double parseDouble(String source)

Parses the string and returns a double representation.

Default implementation uses Double.parseDouble(java.lang.String)

Parameters:

source - the text to parse

Returns:

the parsed representation

parseFloat

public float parseFloat(String source)

Parses the string and returns a float representation.

Default implementation uses Float.parseFloat(java.lang.String)

Parameters:

source - the text to parse

Returns:

the parsed representation

parseInt

public int parseInt(String source)

Parses the string and returns an integer representation.

Default implementation uses Integer.parseInt(java.lang.String)

Parameters:

source - the text to parse

Returns:

the parsed representation

parseShort

public short parseShort(String source)

Parses the string and returns a short representation.

Default implementation uses Short.parseShort(java.lang.String)

Parameters:

source - the text to parse

Returns:

the parsed representation

parseByte

public byte parseByte(String source)

Parses the string and returns a byte representation.

Default implementation uses Byte.parseByte(java.lang.String)

Parameters:

source - the text to parse

Returns:

the parsed representation

parseString

public String parseString(String source)

Parses the string and returns a string representation.

Default implementation returns the string.

Parameters:

source - the text to parse

Returns:

the parsed representation

parseEnum

public int parseEnum(String source,
                     List<String> labels)

Parses the string and returns the index in the enum.

Default implementation matches the label and returns the index.

Parameters:

source - the text to parse

labels - the labels for the enum

Returns:

the parsed representation

parseDoubleArray

public org.epics.util.array.ListDouble parseDoubleArray(String source)

Parses the string and returns a double array representation.

Default implementation expects a comma separated list, and parses each element with parseDouble(java.lang.String).

Parameters:

source - the text to parse

Returns:

the parsed representation

parseFloatArray

public org.epics.util.array.ListFloat parseFloatArray(String source)

Parses the string and returns a float array representation.

Default implementation expects a comma separated list, and parses each element with parseFloat(java.lang.String).

Parameters:

source - the text to parse

Returns:

the parsed representation

parseIntArray

public org.epics.util.array.ListInteger parseIntArray(String source)

Parses the string and returns an int array representation.

Default implementation expects a comma separated list, and parses each element with parseInt(java.lang.String).

Parameters:

source - the text to parse

Returns:

the parsed representation

parseShortArray

public org.epics.util.array.ListShort parseShortArray(String source)

Parses the string and returns a short array representation.

Default implementation expects a comma separated list, and parses each element with parseShort(java.lang.String).

Parameters:

source - the text to parse

Returns:

the parsed representation

parseByteArray

public org.epics.util.array.ListByte parseByteArray(String source)

Parses the string and returns a byte array representation.

Default implementation expects a comma separated list, and parses each element with parseByte(java.lang.String).

Parameters:

source - the text to parse

Returns:

the parsed representation

parseStringArray

public List<String> parseStringArray(String source)

Parses the string and returns a string array representation.

Default implementation expects a comma separated list, and parses each element with parseString(java.lang.String).

Parameters:

source - the text to parse

Returns:

the parsed representation

parseEnumArray

public org.epics.util.array.ListInteger parseEnumArray(String source,
                                                       List<String> labels)

Parses the string and returns an array of indexes in the enum.

Default implementation expects a comma separated list, and parses each element with parseEnum(java.lang.String, java.util.List).

Parameters:

source - the text to parse

labels - the labels for the enum

Returns:

the parsed representation