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Improve BaseFee class and its children

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Checks are added to ensure that fees are always non-negative, while credits are always negative, as required by the EPP fee extension specification. Also, BaseFee is made specifically abstract.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=131620110
This commit is contained in:
mountford
2016-08-29 12:08:24 -07:00
committed by Ben McIlwain
parent 8059ab5c90
commit 59ac00478e
3 changed files with 12 additions and 1 deletions
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2
java/google/registry/model/domain/fee/Fee.java
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@@ -14,6 +14,7 @@
package google.registry.model.domain.fee;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.collect.ImmutableList;
@@ -41,6 +42,7 @@ public class Fee extends BaseFee {
public static Fee create(BigDecimal cost, String description) {
Fee instance = new Fee();
instance.cost = checkNotNull(cost);
checkArgument(instance.cost.signum() >= 0);
instance.description = description;
return instance;
}