https://github.com/tonivade/equalizer

Java Helper class to create nice equals methods
https://github.com/tonivade/equalizer

builder equals java

Last synced: about 1 month ago
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Java Helper class to create nice equals methods

• Host: GitHub
• URL: https://github.com/tonivade/equalizer
• Owner: tonivade
• License: mit
• Created: 2015-10-16T22:21:08.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2018-05-22T20:08:22.000Z (almost 7 years ago)
• Last Synced: 2025-02-09T23:49:20.182Z (3 months ago)
• Topics: builder, equals, java
• Language: Java
• Size: 67.4 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
Equalizer

=========

Equalizer is a helper class in order to create nice equals method for your java classes.

There are some alternatives like commons-lang, guava or Object.equals, but all have the same problem:

    @Override

    public boolean equals(Object obj) {

        if (this == obj) {

            return true;

        }

        if (obj == null) {

            return false;

        }

        if (getClass() != obj.getClass()) {

            return false;

        }

        Data other = (Data) obj;

        return Objects.equals(this.id, other.id) && Objects.equals(this.value, other.value);

    }

There are some boilerplate code you have to include previously to the fields comparison.

Equalizer tries to solve this problem:

    @Override

    public boolean equals(Object obj) {

        return equalizer(this)

            .append((one, other) -> Objects.equals(one.id, other.id))

            .append((one, other) -> Objects.equals(one.value, other.value))

            .applyTo(obj);

    }

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