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Fix Discounter examples

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This commit is contained in:
pivovarit 2017-02-06 09:05:55 +01:00
parent 77f1a97e8f
commit 13f2eef879
2 changed files with 5 additions and 1 deletions
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4
core-java/src/main/java/com/baeldung/strategy/Discounter.java
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@ -5,6 +5,10 @@ import java.util.function.UnaryOperator;
public interface Discounter extends UnaryOperator<BigDecimal> { public interface Discounter extends UnaryOperator<BigDecimal> {
default Discounter combine(Discounter after) {
return value -> after.apply(this.apply(value));
}
static Discounter christmas() { static Discounter christmas() {
return (amount) -> amount.multiply(BigDecimal.valueOf(0.9)); return (amount) -> amount.multiply(BigDecimal.valueOf(0.9));
} }

2
core-java/src/test/java/com/baeldung/strategy/StrategyDesignPatternUnitTest.java
View File

@ -57,7 +57,7 @@ public class StrategyDesignPatternUnitTest {
final Discounter combinedDiscounter = discounters final Discounter combinedDiscounter = discounters
.stream() .stream()
.reduce(v -> v, (d1, d2) -> (Discounter) d1.andThen(d2)); .reduce(v -> v, Discounter::combine);
combinedDiscounter.apply(amount); combinedDiscounter.apply(amount);
} }