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https://github.com/bspeice/itcs4180
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109 lines
3.2 KiB
Java
109 lines
3.2 KiB
Java
package edu.uncc.scavenger.database;
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// Design pattern from: http://www.androiddesignpatterns.com/2012/05/correctly-managing-your-sqlite-database.html
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import java.util.ArrayList;
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import edu.uncc.scavenger.rest.RestLocation;
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import android.content.ContentValues;
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import android.content.Context;
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import android.database.Cursor;
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import android.database.sqlite.SQLiteDatabase;
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import android.database.sqlite.SQLiteDatabase.CursorFactory;
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import android.database.sqlite.SQLiteOpenHelper;
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import android.database.sqlite.SQLiteStatement;
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public class LocationDatabaseHelper extends SQLiteOpenHelper {
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private static LocationDatabaseHelper helper;
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private static final String DATABASE_NAME = "locations.db";
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private static final String TABLE_NAME = "LOCATIONS";
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private static final int DATABASE_VERSION = 1;
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private static final String KEY_ID = "ID";
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private static final String KEY_NAME = "NAME";
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private static final String KEY_RIDDLE = "RIDDLE";
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private static final String KEY_LOCATION_LONG = "LOCATION_LONG";
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private static final String KEY_LOCATION_LAT = "LOCATION_LAT";
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private static final String KEY_KEY = "KEY";
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private LocationDatabaseHelper(Context ctx) {
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super(ctx, DATABASE_NAME, null, DATABASE_VERSION);
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}
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public LocationDatabaseHelper getInstance(Context ctx) {
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if (helper == null) {
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helper = new LocationDatabaseHelper(ctx.getApplicationContext());
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}
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return helper;
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}
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private static final String CREATE_QUERY =
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"CREATE TABLE " + TABLE_NAME + "(" +
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KEY_ID + " int PRIMARY KEY," +
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KEY_NAME + " VARCHAR(255)," +
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KEY_RIDDLE + " VARCHAR(1024)," +
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KEY_LOCATION_LONG + " REAL," +
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KEY_LOCATION_LAT + " REAL" +
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KEY_KEY + " VARCHAR(255)" +
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");";
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@Override
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public void onCreate(SQLiteDatabase db) {
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db.execSQL(CREATE_QUERY);
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}
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@Override
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public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
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return;
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}
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public RestLocation locationFromCursor(Cursor c) {
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RestLocation location = null;
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if (c != null) {
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location = new RestLocation();
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location.setId(c.getInt(0));
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location.setName(c.getString(1));
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location.setRiddle(c.getString(2));
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location.setLocationLong(c.getDouble(3));
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location.setLocationLat(c.getDouble(4));
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location.setKey(c.getString(5));
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}
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return location;
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}
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public ArrayList<RestLocation> fetchAll() {
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ArrayList<RestLocation> results = new ArrayList<RestLocation>();
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SQLiteDatabase db = helper.getReadableDatabase();
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Cursor c = db.query(TABLE_NAME, new String[]{KEY_ID, KEY_NAME, KEY_RIDDLE, KEY_LOCATION_LONG,
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KEY_LOCATION_LAT, KEY_KEY},
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null, null, null, null, null);
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if (c != null && c.getCount() > 0) {
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c.moveToFirst();
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do {
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RestLocation loc = locationFromCursor(c);
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if (loc != null) {
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results.add(loc);
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}
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} while (c.moveToNext());
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}
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return results;
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}
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public void persist(RestLocation loc) {
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ContentValues values = new ContentValues();
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values.put(KEY_ID, loc.getId());
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values.put(KEY_NAME, loc.getName());
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values.put(KEY_RIDDLE, loc.getRiddle());
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values.put(KEY_LOCATION_LONG, loc.getLocationLong());
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values.put(KEY_LOCATION_LAT, loc.getLocationLat());
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values.put(KEY_KEY, loc.getKey());
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helper.getWritableDatabase().insert(TABLE_NAME, null, values);
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}
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}
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