@Equiv

If you wrote the following groovy code:

    static class Sample {
        @Equiv
        String name

        @Equiv
        String value

        String ignored
    }

then you could use equals method and hashCode method:

    def s1 = new Sample(name:'John', value:'Good', ignored:'Garbage')
    def s2 = new Sample(name:'John', value:'Good', ignored:'Gold')
    def s3 = new Sample(name:'John', value:'Bad',  ignored:'Garbage')
    def s4 = new Sample(name:'Mike', value:'Good', ignored:'Garbage')

    assert s1 == s1
    assert s1 == s2
    assert s1 != s3
    assert s1 != s4

    assert s1.hashCode() == s1.hashCode()
    assert s1.hashCode() == s2.hashCode()
    assert s1.hashCode() != s3.hashCode()
    assert s1.hashCode() != s4.hashCode()