TupleConstructor annotation in Groovy generate constructors for class with each of its properties (eventually also fields). The class below
@TupleConstructor(includeFields = true)
class Person {
String firstName
String lastName
private boolean male
}
will have constructors: Person(), Persion(String), Person(String, String) and Person(String, String, boolean). You could test it using code below.
class TupleConstructorTest extends GroovyTestCase{
@Test
void testSimpleTupleConstructorShouldGenerateConstructor() {
assertScript '''
import groovy.transform.TupleConstructor
@TupleConstructor(includeFields = true)
class Person {
private final String firstName
private final String lastName
private final boolean male
String toString(){ "$firstName $lastName $male" }
}
assert Person.constructors.size() == 4
assert new Person().toString() == 'null null false'
assert new Person('John').toString() == 'John null false'
assert new Person('John','Smith').toString() == 'John Smith false'
assert new Person('John','Smith', true).toString() == 'John Smith true'
'''
}
}
I almost always create classes with all private final fields and generate constructior with all fields using my IDE.
So I have prepared new transformation AllFieldConstructor which bases on TupleConstructor and generates only constructor with all fields as parameters.
class AllFieldConstructorTest extends GroovyTestCase{
@Test
void testSimpleTupleConstructorShouldGenerateConstructor() {
assertScript '''
import com.blogspot.przybyszd.transformations.AllFieldConstructor
@AllFieldConstructor
class Person {
private final String firstName
private final String lastName
private final boolean male
String toString(){ "$firstName $lastName $male" }
}
assert Person.constructors.size() == 1
assert new Person('John','Smith', true).toString() == 'John Smith true'
'''
}
}
The sources are available here
