NotSpecification.java

package net.java.cargotracker.domain.shared;

/**
 * NOT decorator, used to create a new specifcation that is the inverse (NOT) of
 * the given spec.
 */
public class NotSpecification<T> extends AbstractSpecification<T> {

    private final Specification<T> spec1;

    /**
     * Create a new NOT specification based on another spec.
     *
     * @param spec1 Specification instance to not.
     */
    public NotSpecification(Specification<T> spec1) {
        this.spec1 = spec1;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean isSatisfiedBy(T t) {
        return !spec1.isSatisfiedBy(t);
    }
}