Item.java

package com.cellasoft.univrapp.model;

import android.net.Uri;
import android.provider.BaseColumns;
import com.cellasoft.univrapp.loader.ItemLoader;
import com.cellasoft.univrapp.manager.ContentManager;
import com.cellasoft.univrapp.provider.Provider;

import java.io.Serializable;
import java.sql.Timestamp;
import java.util.Date;

public class Item implements ActionSupport, Comparable<Item>, Serializable {

    public static final int UNREAD = 0;
    public static final int READ = 1;
    public static final int TEMPORARILY_MARKED_AS_READ = 2;
    public static final int KEPT_UNREAD = 3;
    private static final long serialVersionUID = 8512014197691115155L;
    // All <item> node name
    public int id;
    public String title;
    public String link;
    public String description;
    public String category;
    public Date pubDate;
    public String guid;
    public int read;
    public long updateTime;
    public Channel channel;

    public Item() {
        this.id = 0;
        this.read = UNREAD;
        this.pubDate = new Timestamp(System.currentTimeMillis());
    }

    public Item(int id) {
        this();
        this.id = id;
    }

    // constructor with parameters
    public Item(String title, String link, String description, Date pubDate,
                String guid) {
        this.title = title;
        this.link = link;
        this.description = description;
        if (pubDate != null)
            this.pubDate = pubDate;
        this.guid = guid;
    }

    public Item(Item item) {
        this.id = item.id;
        this.title = item.title;
        this.link = item.link;
        this.description = item.description;
        this.pubDate = item.pubDate;
        this.guid = item.guid;
        this.read = item.read;
        this.updateTime = item.updateTime;
        this.channel = item.channel;
    }

    public static Item findItemById(int id, ItemLoader loader) {
        return ContentManager.loadItem(id, loader,
                ContentManager.LIGHTWEIGHT_CHANNEL_LOADER);
    }

    public boolean isRead() {
        return this.read == READ;
    }

    @Override
    public int compareTo(Item another) {
        if (another == null)
            return 1;
        return another.pubDate.compareTo(pubDate);
    }

    @Override
    public int hashCode() {
        return 31 + ((link == null) ? 0 : link.hashCode());
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Item other = (Item) obj;

        if (id != 0 && other.id != 0) {
            return id == other.id;
        } else if (link == null) {
            if (other.link != null)
                return false;
        } else if (!link.equals(other.link))
            return false;
        return true;
    }

    public void markItemAsRead() {
        ContentManager.markItemAsRead(this);
    }

    @Override
    public boolean save() {
        return ContentManager.saveItem(this);
    }

    @Override
    public void delete() {
        ContentManager.deleteItem(this);
    }

    @Override
    public boolean exist() {
        return ContentManager.existItem(this);
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("Title: ").append(title).append("\n");
        sb.append("Link: ").append(link).append('\n');
        sb.append("Description: ").append(description).append("\n");
        sb.append("Date: ").append(pubDate).append('\n');
        sb.append("Guid: ").append(guid).append('\n');
        return sb.toString();
    }

    public static final class Items implements BaseColumns {
        public static final Uri CONTENT_URI = Uri.parse("content://"
                + Provider.AUTHORITY + "/items");
        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/vnd.cellasoft.univrapp.provider.items";

        public static final String ID = "ID";
        public static final String TITLE = "TITLE";
        public static final String DESCRIPTION = "DESCRIPTION";
        public static final String PUB_DATE = "PUB_DATE";
        public static final String LINK = "LINK";
        public static final String READ = "READ";
        public static final String CHANNEL_ID = "CHANNEL_ID";
        public static final String UPDATE_TIME = "UPDATE_TIME";
        public static final String UNREAD_COUNT = "UNREAD";
        public static final String COUNT = "COUNT(DISTINCT ID)";

        public static final Uri hasTagAndLimit(int limit) {
            return Uri.parse("content://" + Provider.AUTHORITY + "/items/tag/"
                    + limit);
        }

        public static final Uri count() {
            return Uri
                    .parse("content://" + Provider.AUTHORITY + "/items/count");
        }

        public static final Uri countUnreadEachChannel() {
            return Uri.parse("content://" + Provider.AUTHORITY
                    + "/items/unread");
        }

        public static final Uri countUnread() {
            return Uri.parse("content://" + Provider.AUTHORITY
                    + "/items/unread/all");
        }

        public static final Uri limit(int limit) {
            return Uri.parse("content://" + Provider.AUTHORITY + "/items/"
                    + limit);
        }

        public static final Uri limitAndStartAt(int limit, int offset) {
            return Uri.parse("content://" + Provider.AUTHORITY + "/items/"
                    + limit + "/" + offset);
        }

    }
}