io.github.theangrydev.businessflows.SadPath Maven / Gradle / Ivy
/*
* Copyright 2016 Liam Williams .
*
* This file is part of business-flows.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.github.theangrydev.businessflows;
/**
* A {@link SadPath} is a {@link BusinessFlow} that is biased towards the result being {@link Sad}.
*
* {@inheritDoc}
*/
public interface SadPath extends BusinessFlow, WithOptional {
/**
* Provides a {@link SadPath} view over a known {@link Sad} object.
*
* @param sad The sad object to initiate the flow with
* @param The type of happy object the resulting {@link SadPath} may represent
* @param The type of sad object the resulting {@link SadPath} may represent
* @return A {@link SadPath} that is sad on the inside
*/
static SadPath sadPath(Sad sad) {
return new SadCaseSadPath<>(sad);
}
/**
* Provides a {@link SadPath} view over a known {@link Happy} object.
*
* @param happy The happy object to initiate the flow with
* @param The type of happy object the resulting {@link SadPath} may represent
* @param The type of sad object the resulting {@link SadPath} may represent
* @return A {@link SadPath} that is happy on the inside
*/
static SadPath happyPath(Happy happy) {
return new HappyCaseSadPath<>(happy);
}
/**
* Provides a {@link SadPath} view over a known {@link Exception} object.
*
* @param technicalFailure The technical failure object to initiate the flow with
* @param The type of happy object the resulting {@link SadPath} may represent
* @param The type of sad object the resulting {@link SadPath} may represent
* @return A {@link SadPath} that is a technical failure on the inside
*/
static SadPath technicalFailure(Exception technicalFailure) {
return new TechnicalFailureCaseSadPath<>(technicalFailure);
}
/**
* If the underlying business case is sad, then apply the given action, otherwise do nothing to the underlying case.
*
* @param action The action to apply to an existing sad case
* @param The type of sad object that will be present after the action is applied to an existing sad object
* @return The result of applying the action to the existing sad path, if applicable
*/
SadPath then(Mapping> action);
/**
* If the underlying business case is sad, then apply the given mapping, otherwise do nothing to the underlying case.
*
* @param mapping The action to apply to an existing sad case
* @param The type of sad object that will be present after the mapping is applied to an existing sad object
* @return The result of applying the mapping to the existing sad path, if applicable
*/
SadPath map(Mapping mapping);
/**
* If the underlying business case is sad, recover to a happy path using the given recovery mapping.
*
* @param recovery The recovery to apply to an existing sad case
* @return The result of applying the recovery to the existing sad path, if applicable
*/
HappyPath recover(Mapping recovery);
/**
* If the underlying business case is sad, recover to a happy path using the {@link Attempt}.
*
* @param recovery The recovery to apply to an existing sad case
* @return The result of applying {@link Attempt}, if applicable
*/
HappyPath recover(Attempt recovery);
/**
* Take a look at the sad case (if there really is one).
*
* @param peek What to do if the underlying business case is sad
* @return The same {@link SadPath}
*/
SadPath peek(Peek peek);
/**
* {@inheritDoc}
*/
@Override
default SadPath ifSad() {
return this;
}
}