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src/main/java/com/wellsfargo/counselor/entity/Client.java

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+package com.wellsfargo.counselor.entity;
+
+import jakarta.persistence.*;
+
+@Entity
+public class Client {
+
+    @Id
+    @GeneratedValue
+    private long clientId;
+
+    @Column(nullable = false)
+    private String name;
+
+    @Column(nullable = false)
+    private String contactInfo;
+
+    // Foreign key reference to Advisor
+    @ManyToOne
+    @JoinColumn(name = "advisor_id", nullable = false)
+    private Advisor advisor;
+
+    @OneToOne(mappedBy = "client", cascade = CascadeType.ALL)
+    private Portfolio portfolio;
+
+    protected Client() {}
+
+    public Client(String name, String contactInfo, Advisor advisor) {
+        this.name = name;
+        this.contactInfo = contactInfo;
+        this.advisor = advisor;
+    }
+
+    // Getters and Setters
+    public long getClientId() { return clientId; }
+
+    public String getName() { return name; }
+
+    public void setName(String name) { this.name = name; }
+
+    public String getContactInfo() { return contactInfo; }
+
+    public void setContactInfo(String contactInfo) { this.contactInfo = contactInfo; }
+
+    public Advisor getAdvisor() { return advisor; }
+
+    public void setAdvisor(Advisor advisor) { this.advisor = advisor; }
+
+    public Portfolio getPortfolio() { return portfolio; }
+
+    public void setPortfolio(Portfolio portfolio) { this.portfolio = portfolio; }
+}

src/main/java/com/wellsfargo/counselor/entity/Portfolio.java

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+package com.wellsfargo.counselor.entity;
+
+import jakarta.persistence.*;
+import java.util.List;
+
+@Entity
+public class Portfolio {
+
+    @Id
+    @GeneratedValue
+    private long portfolioId;
+
+    @OneToOne
+    @JoinColumn(name = "client_id", nullable = false)
+    private Client client;
+
+    @OneToMany(mappedBy = "portfolio", cascade = CascadeType.ALL)
+    private List<Security> securities;
+
+    protected Portfolio() {}
+
+    public Portfolio(Client client) {
+        this.client = client;
+    }
+
+    // Getters and Setters
+    public long getPortfolioId() { return portfolioId; }
+
+    public Client getClient() { return client; }
+
+    public void setClient(Client client) { this.client = client; }
+
+    public List<Security> getSecurities() { return securities; }
+
+    public void setSecurities(List<Security> securities) { this.securities = securities; }
+}

src/main/java/com/wellsfargo/counselor/entity/Security.java

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+package com.wellsfargo.counselor.entity;
+
+import jakarta.persistence.*;
+import java.time.LocalDate;
+
+@Entity
+public class Security {
+
+    @Id
+    @GeneratedValue
+    private long securityId;
+
+    @Column(nullable = false)
+    private String name;
+
+    @Column(nullable = false)
+    private String category;
+
+    @Column(nullable = false)
+    private LocalDate purchaseDate;
+
+    @Column(nullable = false)
+    private double purchasePrice;
+
+    @Column(nullable = false)
+    private int quantity;
+
+    @ManyToOne
+    @JoinColumn(name = "portfolio_id", nullable = false)
+    private Portfolio portfolio;
+
+    protected Security() {}
+
+    public Security(String name, String category, LocalDate purchaseDate, double purchasePrice, int quantity, Portfolio portfolio) {
+        this.name = name;
+        this.category = category;
+        this.purchaseDate = purchaseDate;
+        this.purchasePrice = purchasePrice;
+        this.quantity = quantity;
+        this.portfolio = portfolio;
+    }
+
+    // Getters and Setters
+    public long getSecurityId() { return securityId; }
+
+    public String getName() { return name; }
+
+    public void setName(String name) { this.name = name; }
+
+    public String getCategory() { return category; }
+
+    public void setCategory(String category) { this.category = category; }
+
+    public LocalDate getPurchaseDate() { return purchaseDate; }
+
+    public void setPurchaseDate(LocalDate purchaseDate) { this.purchaseDate = purchaseDate; }
+
+    public double getPurchasePrice() { return purchasePrice; }
+
+    public void setPurchasePrice(double purchasePrice) { this.purchasePrice = purchasePrice; }
+
+    public int getQuantity() { return quantity; }
+
+    public void setQuantity(int quantity) { this.quantity = quantity; }
+
+    public Portfolio getPortfolio() { return portfolio; }
+
+    public void setPortfolio(Portfolio portfolio) { this.portfolio = portfolio; }
+}