booknews.java

beginJsp2.0外文书籍源代码

package com.wrox.publish.om;

import java.sql.Timestamp;
import org.apache.struts.validator.ValidatorForm;

/**
 * JavaBean encapsulating a single news item for a book. This class
 * has a natural sorting order which is by publishing date descending.
 * It extends ValidatorForm for easy population and validation within 
 * the Struts framework.
 */
public class BookNews extends ValidatorForm implements Comparable {
    private long id;
    private Book book;
    private String title;
    private String body;
    private String user;
    private Timestamp published = new Timestamp(System.currentTimeMillis());
    
    /**
     * Getter for property id (the primary key).
     * @return Value of property id.
     */
    public long getId() {
        return this.id;
    }
    
    /**
     * Setter for property id (the primary key).
     * @param id New value of property id.
     */
    public void setId(long id) {
        this.id = id;
    }
    
    /**
     * Getter for the book the news item is associated with.
     * @return The Book object.
     */
    public Book getBook() {
        return this.book;
    }
    
    /**
     * Setter for the book the news item is associated with.
     * @param book The new Book association for this item.
     */
    public void setBook(Book book) {
        this.book = book;
    }
    
    /**
     * Getter for the news item title.
     * @return The title.
     */
    public String getTitle() {
        return this.title;
    }
    
    /**
     * Setter for the news item title.
     * @param title The new title.
     */
    public void setTitle(String title) {
        this.title = title;
    }

    /**
     * Retrieves the item's author.
     * @return The user who authored the news item.
     */
    public String getUser() {
        return this.user;
    }
    
    /**
     * Sets the item author.
     * @param user The user who authored the new news item.
     */
    public void setUser(String user) {
        this.user = user;
    }
    
    /**
     * Getter for the body text of this news item.
     * @return The body as a String.
     */
    public String getBody() {
        return this.body;
    }
    
    /**
     * Setter for the body text of this news item.
     * @param body The new body.
     */
    public void setBody(String body) {
        this.body = body;
    }
    
    /**
     * When the news item was first published.
     * @return The publication date and time as a Timestamp.
     */
    public Timestamp getPublished() {
        return this.published;
    }
    
    /**
     * Sets when the news item was first published. This property defaults
     * to the current date and time for new BookNews objects.
     * @param published The new publication Timestamp.
     */
    public void setPublished(Timestamp published) {
        this.published = published;
    }
   
    /**
     * Compares this BookNews item to the given Object, which must
     * also be a BookNews item.
     * @param o the Object to be compared.
     * @return a negative integer, zero, or a positive integer as this object
     * is less than, equal to, or greater than the specified object.
     */
    public int compareTo(Object o) {
        return compareTo((BookNews)o);
    }
    
    /**
     * Compares this BookNews item to the given item.
     * @param that The BookNews to be compared.
     * @return a negative integer, zero, or a positive integer as this object
     * is less than, equal to, or greater than the specified object.
     */    
    public int compareTo(BookNews that) {
        int cf;
        if (this.published == null) {
            cf = (that.published == null) ? 0 : 1;
        } else if (that.published == null) {
            cf = -1;
        } else {
            cf = -this.published.compareTo(that.published);
        }
        if (cf == 0 && this.id != that.id) {
            cf = (this.id > that.id) ? -1 : 0;
        }
        return cf;
    }
    
    /** 
     * Compares this BookNews item to the given Object for equality.
     * @param o The object to compare with.
     * @return <code>true</code> if the object is also a BookNews item, 
     *  and has the same primary key (id).
     */    
    public boolean equals(Object o) {
        return o instanceof BookNews && equals((BookNews)o);
    }
    
    /** 
     * Compares this BookNews item to the given item for equality.
     * @param that The BookNews to compare with.
     * @return <code>true</code> if the item has the same primary key (id).
     */    
    public boolean equals(BookNews that) {
        return this.id == that.id;
    }
    
    /**
     * Returns a hash code consistent with equals().
     * @return The hash code.
     */
    public int hashCode() {
        return (int)id;
    }
    
    /**
     * Returns a String representation which is mainly useful for
     * debugging purposes.
     * @return A String representation of this BookNews item.
     */    
    public String toString() {
        return "[" + super.toString() + " " +
        "id=" + id + " book=" + book + "title=" + title + "]";
    }
}