Android Open Source - android-http Abstract Default Content Provider

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (C) 2012, 2013 the diamond:dogs|group
 */*from www  .  j a v  a  2 s  .  c o  m*/
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package at.diamonddogs.contentprovider;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import android.content.ContentProvider;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.net.Uri;

/**
 * A default {@link ContentProvider} that holds common functionality
 */
public abstract class AbstractDefaultContentProvider extends ContentProvider {

  private static final Logger LOGGER = LoggerFactory.getLogger(AbstractDefaultContentProvider.class.getSimpleName());

  protected abstract SQLiteOpenHelper getDatabaseHelper();

  protected abstract String getDefaultTableName();

  @Override
  public int delete(Uri uri, String selection, String[] selectionArgs) {
    SQLiteDatabase db = getDatabaseHelper().getWritableDatabase();
    int rows = db.delete(getDefaultTableName(), selection, selectionArgs);
    getContext().getContentResolver().notifyChange(uri, null);
    return rows;
  }

  @Override
  public Uri insert(Uri uri, ContentValues values) {
    SQLiteDatabase db = getDatabaseHelper().getWritableDatabase();
    long rowId = db.insertWithOnConflict(getDefaultTableName(), null, values, SQLiteDatabase.CONFLICT_REPLACE);
    if (rowId > 0) {
      Uri newUri = Uri.withAppendedPath(uri, String.valueOf(rowId));
      getContext().getContentResolver().notifyChange(newUri, null);
      return newUri;
    }
    throw new SQLException("Failed to insert row into " + uri);
  }

  @Override
  public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
    SQLiteDatabase db = getDatabaseHelper().getReadableDatabase();
    return db.query(getDefaultTableName(), projection, selection, selectionArgs, null, null, sortOrder);
  }

  @Override
  public int bulkInsert(Uri uri, ContentValues[] values) {
    SQLiteDatabase db = getDatabaseHelper().getWritableDatabase();
    db.beginTransaction();
    int rows = 0;
    try {
      for (ContentValues cv : values) {
        long i = db.insertWithOnConflict(getDefaultTableName(), null, cv, SQLiteDatabase.CONFLICT_REPLACE);
        if (i == -1) {
          LOGGER.error("inserting " + cv + " failed");
        }
        rows++;
      }
      LOGGER.info("inserted - rows: " + rows);
      db.setTransactionSuccessful();
    } catch (Throwable tr) {
      LOGGER.error("Error while bulk inserting", tr);
    } finally {
      db.endTransaction();
    }
    getContext().getContentResolver().notifyChange(uri, null);
    return rows;
  }

  @Override
  public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
    SQLiteDatabase db = getDatabaseHelper().getWritableDatabase();
    int count = db.update(getDefaultTableName(), values, selection, selectionArgs);
    getContext().getContentResolver().notifyChange(uri, null);
    return count;
  }

  @Override
  public String getType(Uri uri) {
    return null;
  }

}

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