org.pitest.sequence.Match Maven / Gradle / Ivy
package org.pitest.sequence;
import java.util.function.Predicate;
import static org.pitest.sequence.Result.result;
/**
* Predicate with additional context.
*
* Implemented as abstract class as we're still on Java
* 6 and don't have default methods
*
* @param Type to match
*/
@FunctionalInterface
public interface Match {
Result test(Context c, T t);
static Match always() {
return (c, t) -> result(true, c);
}
static Match never() {
return (c, t) -> result(false, c);
}
static Match isEqual(final Object targetRef) {
return (c, t) -> result(targetRef.equals(t), c);
}
default Match and(final Match other) {
return (c, t) -> {
Result r = this.test(c,t);
if (!r.result()) {
return r;
}
return other.test(r.context(), t);
};
}
default Match negate() {
return (c, t) -> {
Result r = this.test(c,t);
if (!r.result()) {
return result(true, r.context());
}
return result(false, c);
};
}
default Match or(final Match other) {
return (c, t) -> {
Result r = this.test(c,t);
if (r.result()) {
return r;
}
return other.test(c,t);
};
}
/**
* Convert to plain predicate with no context
*/
default Predicate asPredicate() {
return t -> this.test(Context.start(), t).result();
}
}