Create Employment relationship

ass1-jpa/src/main/java/dst/ass1/jpa/model/impl/Employment.java

@@ -0,0 +1,58 @@
+package dst.ass1.jpa.model.impl;
+
+import dst.ass1.jpa.model.IDriver;
+import dst.ass1.jpa.model.IEmployment;
+import dst.ass1.jpa.model.IEmploymentKey;
+import dst.ass1.jpa.model.IOrganization;
+import org.hibernate.annotations.Target;
+
+import javax.persistence.*;
+import java.util.Date;
+
+import static dst.ass1.jpa.util.Constants.T_DRIVER;
+import static dst.ass1.jpa.util.Constants.T_ORGANIZATION;
+
+@Entity
+public class Employment implements IEmployment {
+    @EmbeddedId @Target(EmploymentKey.class) private IEmploymentKey id;
+    private Date since;
+    private Boolean active;
+
+    @MapsId(T_ORGANIZATION)
+    @ManyToOne(targetEntity = Organization.class)
+    IOrganization organization;
+
+    @MapsId(T_DRIVER)
+    @ManyToOne(targetEntity = Driver.class)
+    IDriver driver;
+
+    @Override
+    public IEmploymentKey getId() {
+        return id;
+    }
+
+    @Override
+    public void setId(IEmploymentKey employmentKey) {
+        this.id = employmentKey;
+    }
+
+    @Override
+    public Date getSince() {
+        return since;
+    }
+
+    @Override
+    public void setSince(Date since) {
+        this.since = since;
+    }
+
+    @Override
+    public Boolean isActive() {
+        return active;
+    }
+
+    @Override
+    public void setActive(Boolean active) {
+        this.active = active;
+    }
+}

ass1-jpa/src/main/java/dst/ass1/jpa/model/impl/EmploymentKey.java

@@ -0,0 +1,55 @@
+package dst.ass1.jpa.model.impl;
+
+import dst.ass1.jpa.model.IDriver;
+import dst.ass1.jpa.model.IEmploymentKey;
+import dst.ass1.jpa.model.IOrganization;
+
+import javax.persistence.Embeddable;
+import javax.persistence.ManyToOne;
+import java.io.Serializable;
+import java.util.Objects;
+
+@Embeddable
+public class EmploymentKey implements IEmploymentKey, Serializable {
+    @ManyToOne(targetEntity = Driver.class)
+    IDriver driver;
+
+    @ManyToOne(targetEntity = Organization.class)
+    IOrganization organization;
+
+    public EmploymentKey() {
+    }
+
+    @Override
+    public IDriver getDriver() {
+        return driver;
+    }
+
+    @Override
+    public void setDriver(IDriver driver) {
+        this.driver = driver;
+    }
+
+    @Override
+    public IOrganization getOrganization() {
+        return organization;
+    }
+
+    @Override
+    public void setOrganization(IOrganization organization) {
+        this.organization = organization;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        EmploymentKey that = (EmploymentKey) o;
+        return getDriver().equals(that.getDriver()) && getOrganization().equals(that.getOrganization());
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(getDriver(), getOrganization());
+    }
+}