dcutils.Lambda Maven / Gradle / Ivy

Go to download
package dcutils;

/**
 * Implementations are passed into functions which require a response provided by the user.

 * E.g.:
new Lambda<Double,Integer>() {
    // Returns half of the integer value.
    public Double apply(Integer param) throws IllegalArgumentException {
       if(null != param) {
          return param / 2d;
       } else {
          return new IllegalArgumentException("param cannot be null.");
       }
    }
 }

 * @author dca
 */
public interface Lambda {
	/**
	 * Implementations take the parameter and return some return value.
	 * @param param The parameter.

	 * @return The return value.

	 * @throws IllegalArgumentException If param is null.

	 */
	public R apply(P param) throws IllegalArgumentException;
} // END interface Lambda