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There are several required methods to implement in order to create a view converter:
- public String getName()
- public boolean acceptsNativeType(int type)
- public abstract int getReturnType()
- public Object convertObject(Object data) throws Exception
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public String getName()
This defines the name that will be shown to the user when applying this converter.
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public boolean acceptsNativeType(int type)
This method returns whether or not this converter will accept a field of the type specified by the “type” argument. This argument will be one of UserInputParameters.TYPE_* (ie. TYPE_NUMERIC, TYPE_TEXT, etc.).
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Anchor getReturnType getReturnType
public abstract int getReturnType()
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public Object convertObject(Object data) throws Exception
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@Override
public Object convertObject(Object data) {
if (data == null) return null;
try {
return new BigDecimal((String)data);
} catch (NumberFormatException e) {
return null;
}
} |
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public Object convertObjectReverse(Object data) throws Exception
This method is used in order for Yellowfin to retrieve the initial values of a converted data set after-the-fact. It should perform the opposite conversion which was applied in convertObject and will receive an object of the type specified as the return type of this Converter.
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