Package uk.ac.starlink.topcat.join
Class ValueCodec
- java.lang.Object
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- uk.ac.starlink.topcat.join.ValueCodec
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public abstract class ValueCodec extends java.lang.Object
Encodes and decodes values for a ValueInfo between different string representations.- Since:
- 7 Sep 2004
- Author:
- Mark Taylor (Starlink)
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Constructor Summary
Constructors Constructor Description ValueCodec()
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Method Summary
All Methods Static Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description abstract java.lang.String
formatValue(java.lang.Object value, int maxLength)
Returns a string representation of a given value in the context of this codec.static ValueCodec[]
getCodecs(uk.ac.starlink.table.ValueInfo info)
Returns an array of ValueCodec objects suitable for representing the values pertaining to a given ValueInfo object.abstract java.lang.Object
unformatString(java.lang.String text)
Decodes a string to give a value in the context of this codec.
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Method Detail
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unformatString
public abstract java.lang.Object unformatString(java.lang.String text)
Decodes a string to give a value in the context of this codec.- Parameters:
text
- string representation of the value- Returns:
- value object as read from text
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formatValue
public abstract java.lang.String formatValue(java.lang.Object value, int maxLength)
Returns a string representation of a given value in the context of this codec. The returned string should be no longer than a given maximum length.- Parameters:
value
- value objectmaxLength
- maximum number of characters in the returned string- Returns:
- string representation of value
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getCodecs
public static ValueCodec[] getCodecs(uk.ac.starlink.table.ValueInfo info)
Returns an array of ValueCodec objects suitable for representing the values pertaining to a given ValueInfo object. The returned array will contain at least one element, which just gets its implementation from the behaviour of the submitted ValueInfo itself, but it may contain more than this, for instance ones relating to different units.- Parameters:
info
- description of the value to represent- Returns:
- array of value codecs for info, containing at least one element
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