Repository Layer

package com.thepracticaldeveloper.reactiveweb.domain;
public final class Quote {
    private String id;
    private String book;
    private String content;
    // Empty constructor is required by the data layer and JSON de/ser
    public Quote() {
    }
    public Quote(String id, String book, String content) {
        this.id = id;
        this.book = book;
        this.content = content;
    }
    public String getId() {
        return id;
    }
    public String getBook() {
        return book;
    }
    public String getContent() {
        return content;
    }
    @Override
    public String toString() {
        return "Quote{" +
                "id='" + id + '\'' +
                ", book='" + book + '\'' +
                ", content='" + content + '\'' +
                '}';
    }
    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Quote quote = (Quote) o;
        if (id != null ? !id.equals(quote.id) : quote.id != null) return false;
        if (book != null ? !book.equals(quote.book) : quote.book != null) return false;
        return content != null ? content.equals(quote.content) : quote.content == null;
    }
    @Override
    public int hashCode() {
        int result = id != null ? id.hashCode() : 0;
        result = 31 * result + (book != null ? book.hashCode() : 0);
        result = 31 * result + (content != null ? content.hashCode() : 0);
        return result;
    }
}