QuotesProvider.java :  » UnTagged » dive-tutorials » com » hazam » softwarequotes » provider » Android Open Source

package com.hazam.softwarequotes.provider;

import android.content.ContentProvider;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;
import android.os.Process;

import com.hazam.util.L;
import com.hazam.util.StorageUtils;

public class QuotesProvider extends ContentProvider {
  private QuotesDatabase mQuotesDatabase;

  public QuotesProvider() {
    L.D(this, "constructor()");
  }

  @Override
  public boolean onCreate() {
    L.D(this, "onCreate() " + Process.myPid());
    final Context ctx = getContext();
    if (!StorageUtils.hasWritableStorage(true)) {
      L.W(this, "SDCard is not Writable!");
      return false;
    }
    mQuotesDatabase = new QuotesDatabase(ctx);
    return true;
  }

  @Override
  public String getType(Uri uri) {
    return "x-quote/vnd.hazam.quote";
  }

  @Override
  public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sort) {
    L.D(this, "query() on provider");
    final SQLiteDatabase db = mQuotesDatabase.getReadableDatabase();
    if (db != null) {
      final String groupBy = null;
      final String having = null;
      return db.query(QuotesContract.Tables.QUOTES, projection, selection, selectionArgs, groupBy, having, sort);
    } else {
      return null;
    }
  }

  @Override
  public Uri insert(Uri uri, ContentValues contentValues) {
    final SQLiteDatabase db = mQuotesDatabase.getWritableDatabase();
    if (db != null) {
      long id = db.insertOrThrow(QuotesContract.Tables.QUOTES, QuotesContract.QuotesColumns.QUOTE_ID,
          contentValues);
      return ContentUris.withAppendedId(QuotesContract.Quotes.CONTENT_URI, id);
    } else {
      return null;
    }
  }

  @Override
  public int delete(Uri uri, String s, String[] strings) {
    final SQLiteDatabase db = mQuotesDatabase.getWritableDatabase();
    if (db != null) {
      return db.delete(QuotesContract.Tables.QUOTES, s, strings);
    } else {
      return 0;
    }
  }

  @Override
  public int update(Uri uri, ContentValues contentValues, String s, String[] strings) {
    final SQLiteDatabase db = mQuotesDatabase.getWritableDatabase();
    if (db != null) {
      return db.update(QuotesContract.Tables.QUOTES, contentValues, s, strings);
    } else {
      return 0;
    }
  }
}