Package com.googlecode.objectify.impl.translate.opt

Class BigDecimalLongTranslatorFactory

  • All Implemented Interfaces:
    TranslatorFactory<BigDecimal,​Long>
    public class BigDecimalLongTranslatorFactory
extends SimpleTranslatorFactory<BigDecimal,​Long>

    This a simple strategy for storing BigDecimal in the datastore. BigDecimalLongConverter multiplies by a fixed factor and stores the result as a Long. This is appropriate for monetary and other (relatively) small values with fixed decimal precision.

    This is one possible strategy and not appropriate for all uses of BigDecimal - especially very large values which cannot fit in a Long. For this reason, the converter is not installed by default. You can Install this converter at the same time you perform registration:

    ObjectifyService.factory().getTranslators().add(new BigDecimalLongTranslatorFactory());

    The default factor of 1,000 is good for currency, which usually has 0-3 digits of precision past the decimal point. But you can pick any other factor appropriate to your application.

    All custom translators must be registered *before* entity classes are registered.

    Author:
    Jeff Schnitzer

    • Field Detail

      • DEFAULT_FACTOR

        public static final long DEFAULT_FACTOR
        Default factor is 1000, which gives you three digits of precision past the decimal point
        See Also:
        Constant Field Values

    • Constructor Detail

      • BigDecimalLongTranslatorFactory

        public BigDecimalLongTranslatorFactory()
        Construct this converter with the default factor (1000), which can store three points of precision past the decimal point.

      • BigDecimalLongTranslatorFactory

        public BigDecimalLongTranslatorFactory​(long factor)
        Construct this with an arbitrary factor. Powers of ten are highly recommended if you want to be able to interpret the numbers in the datastore viewer.
        Parameters:
        factor - number multiplied by before storage and divided by on retrieval.