/**
 * Inheritance Example
 * socialnetwork Example
 * Source code file:  PhotoPost.java

 * This class stores information about a post
 * in a social network news feed. The main part of
 * the post consists of a photo and a caption.
 * Other data, such as author and time, are also
 * stored.
 *
 * Source: Objects First with Java
 * @author Michael Koelling and David J. Barnes
 * @version 0.3
 */
public class PhotoPost extends Post {
    private String _filename;  // the name of the image file
    private String _caption;   // a one line image caption

    /**
     * Constructor for objects of class PhotoPost.
     *
     * @param _author    The username of the author of this post.
     * @param _filename  The filename of the image in this post.
     * @param _caption   A caption for the image.
     */
    public PhotoPost(String author, String filename, String caption) {
        super(author);
        this._filename = filename;
        this._caption = caption;
    }

    /**
     * Return the file name of the image in this post.
     *
     * @return The post's image file name.
     */
    public String getImageFile( ) {
        return _filename;
    }

    /**
     * Return the caption of the image of this post.
     *
     * @return The image's caption.
     */
    public String getCaption( ) {
        return _caption;
    }

    /**
     * Display the details of this post.
     *
     * (Currently: Print to the text terminal.
     * This is simulating display
     * in a web browser for now.)
     */
    public void display( ) {
        System.out.println("  [" + _filename + "]");
        System.out.println("  " + _caption);
        super.display( );
    }
}