net.eduvax.util

Class AStaticTranslator<T,U>

java.lang.Object

net.eduvax.util.AStaticTranslator<T,U>

All Implemented Interfaces:

Translator<T,U>

Direct Known Subclasses:

DblDblStaticTranslator, StrStrStaticTranslator

public abstract class AStaticTranslator<T,U>
extends java.lang.Object
implements Translator<T,U>

Convert utilities based on static table.

Field Summary

Fields

Modifier and Type	Field and Description
private U	_nullValue Default value.
private java.util.Hashtable<T,U>	_table Convertion map

Constructor Summary

Constructors

Constructor and Description
AStaticTranslator(U nullVal) Create new static translator.

Method Summary

Methods

Modifier and Type	Method and Description
void	fillTable(java.lang.String tblText, ErrorHandler eh) Fill table using a string definition.
protected abstract T	sourceTypeFromString(java.lang.String str) String to key convertion.
protected abstract U	targetTypeFromString(java.lang.String str) String to value convertion.
U	translate(T toTranslate) Convert T to U.

Methods inherited from class java.lang.Object

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

Field Detail

_table

private java.util.Hashtable<T,U> _table

Convertion map

_nullValue

private U _nullValue

Default value. Fallback value to return when entry is not found in table.

Constructor Detail

AStaticTranslator

public AStaticTranslator(U nullVal)

Create new static translator.

Parameters:

nullVal - default value to return in response of unknown entry.

Method Detail

sourceTypeFromString

protected abstract T sourceTypeFromString(java.lang.String str)
                                   throws java.lang.Exception

String to key convertion.

Parameters:

str - string to convert.

Returns:

string converted to key type.

Throws:

java.lang.Exception

targetTypeFromString

protected abstract U targetTypeFromString(java.lang.String str)
                                   throws java.lang.Exception

String to value convertion.

Parameters:

str - string to convert.

Returns:

string converted to value type.

Throws:

java.lang.Exception

fillTable

public void fillTable(java.lang.String tblText,
             ErrorHandler eh)

Fill table using a string definition.

Parameters:

tblText - Table textual description. Each table entry is written as : source=target, separated with ';' char. Tab and carriage return are ignored. Example

1=One; 2=Two;
 3=Three; 4=Four;
 5=Five

eh - error handler to use in case of exception while converting elements to U and T type.

translate

public U translate(T toTranslate)

Description copied from interface: Translator

Convert T to U.

Specified by:

translate in interface Translator<T,U>

Parameters:

toTranslate - the thing to be converted

Returns:

converted object