您好,登錄后才能下訂單哦!
dddsample-core中model的作用是什么,相信很多沒有經(jīng)驗的人對此束手無策,為此本文總結(jié)了問題出現(xiàn)的原因和解決方法,通過這篇文章希望你能解決這個問題。
public interface Entity<T> { /** * Entities compare by identity, not by attributes. * * @param other The other entity. * @return true if the identities are the same, regardless of other attributes. */ boolean sameIdentityAs(T other); }
Entity接口定義了sameIdentityAs方法
public interface ValueObject<T> extends Serializable { /** * Value objects compare by the values of their attributes, they don't have an identity. * * @param other The other value object. * @return <code>true</code> if the given value object's and this value object's attributes are the same. */ boolean sameValueAs(T other); }
ValueObject接口定義了sameValueAs方法
public final class TrackingId implements ValueObject<TrackingId> { private String id; /** * Constructor. * * @param id Id string. */ public TrackingId(final String id) { Validate.notNull(id); this.id = id; } /** * @return String representation of this tracking id. */ public String idString() { return id; } @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; TrackingId other = (TrackingId) o; return sameValueAs(other); } @Override public int hashCode() { return id.hashCode(); } @Override public boolean sameValueAs(TrackingId other) { return other != null && this.id.equals(other.id); } @Override public String toString() { return id; } TrackingId() { // Needed by Hibernate } }
TrackingId實現(xiàn)了ValueObject接口,sameValueAs方法通過equals方法判斷
public enum Type implements ValueObject<Type> { LOAD(true), UNLOAD(true), RECEIVE(false), CLAIM(false), CUSTOMS(false); private final boolean voyageRequired; /** * Private enum constructor. * * @param voyageRequired whether or not a voyage is associated with this event type */ private Type(final boolean voyageRequired) { this.voyageRequired = voyageRequired; } /** * @return True if a voyage association is required for this event type. */ public boolean requiresVoyage() { return voyageRequired; } /** * @return True if a voyage association is prohibited for this event type. */ public boolean prohibitsVoyage() { return !requiresVoyage(); } @Override public boolean sameValueAs(Type other) { return other != null && this.equals(other); } }
Type枚舉實現(xiàn)了ValueObject接口,其sameValueAs方法通過equals判斷
public interface DomainEvent<T> { /** * @param other The other domain event. * @return <code>true</code> if the given domain event and this event are regarded as being the same event. */ boolean sameEventAs(T other); }
DomainEvent接口定義了sameEventAs方法
dddsample-core定義了Entity、ValueObject、DomainEvent接口,它們分別定義了sameIdentityAs、sameValueAs、sameEventAs方法。
看完上述內(nèi)容,你們掌握dddsample-core中model的作用是什么的方法了嗎?如果還想學到更多技能或想了解更多相關(guān)內(nèi)容,歡迎關(guān)注億速云行業(yè)資訊頻道,感謝各位的閱讀!
免責聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點不代表本網(wǎng)站立場,如果涉及侵權(quán)請聯(lián)系站長郵箱:is@yisu.com進行舉報,并提供相關(guān)證據(jù),一經(jīng)查實,將立刻刪除涉嫌侵權(quán)內(nèi)容。