Trigger


Source link: https://github.com/blipinsk/Trigger

Trigger

Simple command pattern helper class.

Let's be honest... that's just a simple class, but it can sometimes tidy up your code quite a bit. It uses java generics and intuitive class naming, so you can easily create a method reference or just a callback, just like you wanted.

Usage

For a working implementation of this library see the sample/ folder.

  1. Create a Trigger object (one of 4 types: Trigger.NoParam.NoResult, Trigger.NoParam.WithResult, Trigger.WithParam.NoResultor Trigger.WithParam.WithResult)
Trigger.WithParam.WithResult<Boolean, String> trigger =

Trigger.WithParam.WithResult.create(new Trigger.WithParam.WithResult.OnTriggered<Boolean, String>() {

 @Override

 public String onTriggered(Boolean param) {

  return executeCommandWithResult(param);

 
}

}
);
  1. Pull the trigger to execute the onTriggered block.
String result = trigger.pull(true);

Depending on which version of Trigger you've chosen, pull(...) will behave differently. It:

  1. Will return a value for WithResult triggers.
  2. Won't return anything for NoResult triggers.
  3. Will take a parameter for WithParam triggers.
  4. Won't take anything for NoParam triggers.

Including In Your Project

You can grab the library via Maven Central. Just add a proper dependency inside your build.gradle. Like this:

dependencies {

  compile 'com.bartoszlipinski:trigger:1.0.0' 
}

Developed by

  • Bartosz Lipi?ski

License

Copyright 2016 Bartosz Lipi?ski  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. 

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