次の構造を持つ3つのテーブルがあります-
契約 -> contract_id(プライマリ)、customer_company_id、Vendor_company_id
会社 -> Company_id(プライマリ)、creation_date、created_by
Company_Timeline -> Timeline_id(プライマリ)、Company_id、Company_name.
これらのテーブルには次のクラスがあります-
Contract.java
@Table(name = "CONTRACT")
@Entity
@SequenceGenerator(name = "ContractSeq", sequenceName = "SEQCONTRACT", allocationSize = 1)
public class Contract implements Serializable {
private static final long serialVersionUID = 1L;
/*
* General Tab
*/
@Id
@Column(name = "CONTRACT_ID")
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "ContractSeq")
private Integer id;
/*
* Customer Company Info
*/
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "CUSTOMER_COMPANY_ID", nullable = true ,insertable = false,updatable = false)
@ForeignKey(name = "FK_CONTRACT_CUSTOMER_COMPANY_ID")
private Company customerCompany;
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "VENDOR_COMPANY_ID", nullable = true ,insertable = false,updatable = false)
@ForeignKey(name = "FK_CONTRACT_CVENDOR_COMPANY_ID")
private Company vendorCompany;
//What mapping should i do to get CUSTOMER_COMPANY_ID Timeline list here
//What mapping should i do to get vendor_COMPANY_ID Timeline list here
}
Company.java
@Entity
@Table(name = "COMPANY")
@SequenceGenerator(name="CompanySeq", sequenceName="SEQ_COMPANY", allocationSize=1)
public class Company implements Serializable {
private static final long serialVersionUID = 1L;
/*
* Customer Company Details
*/
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "CompanySeq")
@Column(name = "COMPANY_ID")
private Integer id;
@Column(name="CREATION_DATE")
@Temporal(value=TemporalType.TIMESTAMP)
private Date creationDate;
@Column(name="CREATED_BY")
private String createdBy;
@OneToMany(fetch = FetchType.LAZY, orphanRemoval=true)
@Cascade({org.hibernate.annotations.CascadeType.ALL, org.hibernate.annotations.CascadeType.DELETE_ORPHAN})
@JoinColumn(name = "COMPANY_ID",nullable=false)
@OrderBy(clause = "AS_OFF_DATE" )
@ForeignKey(name = "PF_COMPANY_TIMELINE")
private List<CompanyTimeline> companyTimeline = new ArrayList<CompanyTimeline>();
}
CompanyTimeline.java
@Entity
@Table( name = "COMPANY_TIMELINE")
@SequenceGenerator(name = "CompanyTimelineSeq", sequenceName = "COMPANY_TIMELINE_SEQUENCE")
public class CompanyTimeline {
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "CompanyTimelineSeq")
@Column(name = "COMPANY_EVENT_ID")
private Integer eventId;
@ManyToOne(fetch= FetchType.EAGER)
@JoinColumn(name = "COMPANY_ID", updatable = false, insertable = false, nullable=false)
@ForeignKey(name = "FK_COMPANY_ID", inverseName = "COMPANY_ID")
private Company company;
}
ここで、contract テーブルでマッピング (1 対多) を実行して、customer_company と vendor_company のタイムラインを取得したいと考えています。
ただし、結合列名が同じではないため、Contract テーブルの列名は CUSTOMER_COMPANY_ID、VENDOR_COMPANY_ID ですが、CompanyTimeline クラスの列名は COMPANY_ID です。
Contract.java でこの結合マッピングを作成する方法が少しわかりません。
編集 :
に基づいて、契約テーブルとタイムラインをマッピングしたいと考えていますcontract.customer_company_id = timeline.company_id
。何かのようなもの..
@OneToMany(fetch = FetchType.EAGER)
@JoinColumn(name="COMPANY_ID", referencedColumnName="CUSTOMER_COMPANY_ID")
@Where(clause="to_date(SIGNING_DATE, 'DD-Mon-YY') >= (CASE WHEN event_start_date is null THEN to_date('01-JAN-1901', 'DD-Mon-YYYY') else event_start_date END) AND to_date(SIGNING_DATE, 'DD-Mon-YY') <= (CASE WHEN event_end_date is null THEN to_date('01-JAN-2101', 'DD-Mon-YYYY') else event_end_date END)")
private List<CompanyTimelineView> customerCompanyTimelineView = new ArrayList<CompanyTimelineView>();
これは、熱心な会社なしでタイムライン オブジェクトを直接取得できるように、contract.java でやりたいことです。