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package io.dico.dicore.exceptions.checkedfunctions;
import io.dico.dicore.exceptions.ExceptionHandler;
import java.util.function.BiFunction;
/**
* checked mimic of {@link BiFunction}
*
* @param <TParam1>
* @param <TParam2>
* @param <TResult>
* @param <TException>
*/
@FunctionalInterface
public interface CheckedBiFunction<TParam1, TParam2, TResult, TException extends Throwable>
extends CheckedFunctionalObject<TResult, TException>, BiFunction<TParam1, TParam2, TResult> {
/**
* the functional method
*
* @param t the first input
* @param u the second input
* @return the function output
* @throws TException if an exception occurs
*/
TResult checkedApply(TParam1 t, TParam2 u) throws TException;
/**
* unchecked wrapper for {@link #checkedApply(Object, Object)}
* If a {@link TException} occurs, an unchecked one might be thrown by {@link #resultOnError(Throwable, Object...)}
*
* @param t the first input
* @param u the second input
* @return the function output, or the result from {@link #resultOnError(Throwable, Object...)} if an exception was thrown
* @see #checkedApply(Object, Object)
* @see #resultOnError(Throwable, Object...)
*/
@Override
default TResult apply(TParam1 t, TParam2 u) {
try {
return checkedApply(t, u);
} catch (Throwable ex) {
return handleGenericException(ex, t, u);
}
}
/**
* {@inheritDoc}
*/
@Override
default CheckedBiFunction<TParam1, TParam2, TResult, TException> handleExceptionsWith(ExceptionHandler handler) {
return new CheckedBiFunction<TParam1, TParam2, TResult, TException>() {
@Override
public TResult checkedApply(TParam1 t, TParam2 u) throws TException {
return CheckedBiFunction.this.checkedApply(t, u);
}
@Override
@SuppressWarnings("unchecked")
public TResult handleGenericException(Throwable thrown, Object... args) {
Object result = handler.handleGenericException(thrown, args);
try {
return (TResult) result;
} catch (Exception ex) {
return null;
}
}
@Override
public CheckedBiFunction<TParam1, TParam2, TResult, TException> handleExceptionsWith(ExceptionHandler handler) {
return CheckedBiFunction.this.handleExceptionsWith(handler);
}
};
}
}
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