Specification.java

package net.java.cargotracker.domain.shared;

/**
 * Specification interface.
 * <p/>
 * Use {@link net.java.cargotracker.domain.shared.AbstractSpecification} as base
 * for creating specifications, and only the method
 * {@link #isSatisfiedBy(Object)} must be implemented.
 */
public interface Specification<T> {

    /**
     * Check if {@code t} is satisfied by the specification.
     *
     * @param t Object to test.
     * @return {@code true} if {@code t} satisfies the specification.
     */
    boolean isSatisfiedBy(T t);

    /**
     * Create a new specification that is the AND operation of {@code this}
     * specification and another specification.
     *
     * @param specification Specification to AND.
     * @return A new specification.
     */
    Specification<T> and(Specification<T> specification);

    /**
     * Create a new specification that is the OR operation of {@code this}
     * specification and another specification.
     *
     * @param specification Specification to OR.
     * @return A new specification.
     */
    Specification<T> or(Specification<T> specification);

    /**
     * Create a new specification that is the NOT operation of {@code this}
     * specification.
     *
     * @param specification Specification to NOT.
     * @return A new specification.
     */
    Specification<T> not(Specification<T> specification);
}