Description

A small Java library to implement the builder pattern more easily.

This uses reflection and exposes a method GeneraicBuilder.asBuilder that will create a dynamic proxy to implement a Builder interface. The idiom we support is the follwoing:

• You have a class C with private variables f1, f2, etc...
• You have an interface C.Builder with methods setF1(), setF2(), etc..
• Use this library to create a method on C.newBuilder() to create an instance of C.Builder in one line without writing any extra code.

Usage

Suppose you have the class Thing with builder interface Thing.Builder:

class Thing {
  private File file;
  private int width;
  private Thing() {}
  interface Builder extends com.jeffpalm.buider.Builder {
    Builder setFile(File file);
    Builder setWidth(int width);
  }
}

You can add a newBuilder method to create a Thing.Builder by creating an instance of com.jeffpalm.genericbuilder.GenericBuilder:

class Thing {
  // ....
  public static Builder newBuilder() {
    return new GenericBuilder<Builder>(
         new Thing(), Builder.class).asBuilder();
  }
}

Then you can use the following to create a Thing:

Thing thing = Thing.newBuilder().setFile(file).setWidth(100).build();
thing.getWidth() == 100; // true

Building

To build:

mvn compile

To push assets to github:

mvn deploy