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package bjc.utils.patterns;
import java.util.*;
import java.util.function.*;
import bjc.data.*;
class FunctionalPattern<ReturnType, PredType, InputType>
implements ComplexPattern<ReturnType, PredType, InputType> {
private final Function<InputType, Pair<Boolean, PredType>> matcher;
private final BiFunction<InputType, PredType, ReturnType> accepter;
FunctionalPattern(
Function<InputType, Pair<Boolean, PredType>> matcher,
BiFunction<InputType, PredType, ReturnType> accepter) {
super();
this.matcher = matcher;
this.accepter = accepter;
}
@Override
public Pair<Boolean, PredType> matches(InputType input) {
return matcher.apply(input);
}
@Override
public ReturnType apply(InputType input, PredType state) {
return accepter.apply(input, state);
}
@Override
public int hashCode() {
return Objects.hash(accepter, matcher);
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (getClass() != obj.getClass()) return false;
FunctionalPattern<?, ?, ?> other = (FunctionalPattern<?, ?, ?>) obj;
return Objects.equals(accepter, other.accepter)
&& Objects.equals(matcher, other.matcher);
}
}
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