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

Class BigDecimalLongTranslatorFactory

java.lang.Object

com.googlecode.objectify.impl.translate.ValueTranslatorFactory<BigDecimal,Long>

com.googlecode.objectify.impl.translate.SimpleTranslatorFactory<BigDecimal,Long>

com.googlecode.objectify.impl.translate.opt.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 invalid input: '<'[email protected]>

Field Summary

Fields

Modifier and Type	Field	Description
static final long	DEFAULT_FACTOR	Default factor is 1000, which gives you three digits of precision past the decimal point

Constructor Summary

Constructors

Constructor	Description
BigDecimalLongTranslatorFactory()	Construct this converter with the default factor (1000), which can store three points of precision past the decimal point.
BigDecimalLongTranslatorFactory(long factor)	Construct this with an arbitrary factor.

Method Summary

Modifier and Type	Method	Description
protected com.google.cloud.datastore.Value<Long>	toDatastore(BigDecimal value)
protected BigDecimal	toPojo(com.google.cloud.datastore.Value<Long> value)

Methods inherited from class com.googlecode.objectify.impl.translate.SimpleTranslatorFactory

createValueTranslator

Methods inherited from class com.googlecode.objectify.impl.translate.ValueTranslatorFactory

create

Methods inherited from class java.lang.Object

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

Field Details

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 Details

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.

Method Details

toPojo

protected BigDecimal toPojo(com.google.cloud.datastore.Value<Long> value)

Specified by:

toPojo in class SimpleTranslatorFactory<BigDecimal,Long>

toDatastore

protected com.google.cloud.datastore.Value<Long> toDatastore(BigDecimal value)

Specified by:

toDatastore in class SimpleTranslatorFactory<BigDecimal,Long>