Lidalia Lang -

Lidalia Lang

A set of utility classes that act as extensions of java.lang for common use cases.

See the JavaDocs for full documentation and the Test Source for complete examples of usage. Below are some examples from some of the more common classes.

Details on how to depend on this library in your favourite build tool can be found here.

Examples

Making Checked Exceptions Unchecked

import static uk.org.lidalia.lang.Exceptions.throwUnchecked;

private void throwsCheckedException() throws Exception {
    throw new Exception();
}

public void doSomething() {
    try {
        throwsCheckedException();
    } catch (Exception e) {
        throwUnchecked(e);
    }
}

public String doSomethingAndReturn() {
    try {
        throwsCheckedException();
        return "can't get here";
    } catch (Exception e) {
        return throwUnchecked(e, null);
    }
}

Avoiding Object Boilerplate

import uk.org.lidalia.lang.Identity;
import uk.org.lidalia.lang.RichObject;

public class Person extends RichObject {

    @Identity private final String firstName;
    @Identity private final String lastName;

    public Person(String firstName, String lastName) {
        this.firstName = firstName;
        this.lastName = lastName;
    }

    public String getFirstName() {
        return firstName;
    }

    public String getLastName() {
        return lastName;
    }
}

is the equivalent of:

public class Person {

    private final String firstName;
    private final String lastName;

    public Person(String firstName, String lastName) {
        this.firstName = firstName;
        this.lastName = lastName;
    }

    public String getFirstName() {
        return firstName;
    }

    public String getLastName() {
        return lastName;
    }

    @Override
    public final boolean equals(Object o) {
        if (this == o) return true;
        if (!(o instanceof Person)) return false;

        Person person = (Person) o;

        if (!firstName.equals(person.firstName)) return false;
        if (!lastName.equals(person.lastName)) return false;

        return true;
    }

    @Override
    public final int hashCode() {
        int result = 17;
        result = 37 * result + lastName.hashCode();
        result = 37 * result + lastName.hashCode();
        return result;
    }

    @Override
    public String toString() {
        return "Person[" +
                "firstName=" + firstName +
                ",lastName=" + lastName +
                ']';
    }
}