ollie.OllieProvider Maven / Gradle / Ivy
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Compile-time active record ORM for Android.
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/*
* Copyright (C) 2014 Michael Pardo
*
* 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 ollie;
import android.content.ContentProvider;
import android.content.ContentValues;
import android.content.UriMatcher;
import android.database.Cursor;
import android.net.Uri;
import android.util.SparseArray;
import ollie.internal.ModelAdapter;
import static ollie.Ollie.LogLevel;
/**
*
* Default implementation of a
* ContentProvider. As with any content provider, this class must be
* declared in the manifest..
* When using this content provider, manual initialization is not required as the content provider does this for you.
* This is not a feature of the provider, but rather a requirement due to the behavior of content providers.
*
* Content Uris are built in a restful manner using your package name and tables names. For example:
*
* - content://com.example.notes/notes
* - content://com.example.notes/notes/1
*
*/
public abstract class OllieProvider extends ContentProvider {
private static final UriMatcher URI_MATCHER = new UriMatcher(UriMatcher.NO_MATCH);
private static final SparseArray> TYPE_CODES = new SparseArray>();
private static boolean sIsImplemented = false;
private static String sAuthority;
private static SparseArray sMimeTypeCache = new SparseArray();
/**
* Returns whether the provider has been implemented.
*
* @return Whether the provider has been implemented.
*/
public static boolean isImplemented() {
return sIsImplemented;
}
/**
* Create a Uri for a model table.
*
* @param type The model type.
* @return The Uri for the model table.
*/
public static Uri createUri(Class type) {
return createUri(type, null);
}
/**
* Create a Uri for a model row.
*
* @param type The model type.
* @param id The row Id.
* @return The Uri for the model row.
*/
public static Uri createUri(Class type, Long id) {
final StringBuilder uri = new StringBuilder();
uri.append("content://");
uri.append(sAuthority);
uri.append("/");
uri.append(Ollie.getTableName(type).toLowerCase());
if (id != null) {
uri.append("/");
uri.append(id.toString());
}
return Uri.parse(uri.toString());
}
@Override
public boolean onCreate() {
Ollie.init(getContext(), getDatabaseName(), getDatabaseVersion(), getCacheSize(), getLogLevel());
sAuthority = getAuthority();
sIsImplemented = true;
int i = 0;
for (ModelAdapter modelAdapter : Ollie.getModelAdapters()) {
final int tableKey = (i * 2) + 1;
final int itemKey = (i * 2) + 2;
// content:///
URI_MATCHER.addURI(sAuthority, modelAdapter.getTableName().toLowerCase(), tableKey);
TYPE_CODES.put(tableKey, modelAdapter.getModelType());
// content:////
URI_MATCHER.addURI(sAuthority, modelAdapter.getTableName().toLowerCase() + "/#", itemKey);
TYPE_CODES.put(itemKey, modelAdapter.getModelType());
i++;
}
return true;
}
@Override
public String getType(Uri uri) {
final int match = URI_MATCHER.match(uri);
String cachedMimeType = sMimeTypeCache.get(match);
if (cachedMimeType != null) {
return cachedMimeType;
}
final Class type = getModelType(uri);
final boolean single = ((match % 2) == 0);
StringBuilder mimeType = new StringBuilder();
mimeType.append("vnd");
mimeType.append(".");
mimeType.append(sAuthority);
mimeType.append(".");
mimeType.append(single ? "item" : "dir");
mimeType.append("/");
mimeType.append("vnd");
mimeType.append(".");
mimeType.append(sAuthority);
mimeType.append(".");
mimeType.append(Ollie.getTableName(type));
sMimeTypeCache.append(match, mimeType.toString());
return mimeType.toString();
}
@Override
public Uri insert(Uri uri, ContentValues values) {
final Class type = getModelType(uri);
final Long id = Ollie.getDatabase().insert(Ollie.getTableName(type), null, values);
if (id != null && id > 0) {
Uri retUri = createUri(type, id);
getContext().getContentResolver().notifyChange(uri, null);
return retUri;
}
return null;
}
@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
final int count = Ollie.getDatabase().update(
Ollie.getTableName(getModelType(uri)),
values,
selection,
selectionArgs);
getContext().getContentResolver().notifyChange(uri, null);
return count;
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
final int count = Ollie.getDatabase().delete(
Ollie.getTableName(getModelType(uri)),
selection,
selectionArgs);
getContext().getContentResolver().notifyChange(uri, null);
return count;
}
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
final Cursor cursor = Ollie.getDatabase().query(
Ollie.getTableName(getModelType(uri)),
projection,
selection,
selectionArgs,
null,
null,
sortOrder);
cursor.setNotificationUri(getContext().getContentResolver(), uri);
return cursor;
}
/**
* Returns the database name.
*
* @return The database name.
*/
protected abstract String getDatabaseName();
/**
* Returns the database version.
*
* @return The database version.
*/
protected abstract int getDatabaseVersion();
/**
* Returns the package name as the default Uri authority. Override to provide your own Uri authority.
*
* @return The Uri authority.
*/
protected String getAuthority() {
return getContext().getPackageName();
}
/**
* Returns the default cache size. Override to provide your own cache size.
*
* @return The cache size.
*/
protected int getCacheSize() {
return Ollie.DEFAULT_CACHE_SIZE;
}
/**
* Returns the default log level of NONE. Override to provide your own log level.
*
* @return The log level.
*/
protected LogLevel getLogLevel() {
return LogLevel.NONE;
}
private Class getModelType(Uri uri) {
final int code = URI_MATCHER.match(uri);
if (code != UriMatcher.NO_MATCH) {
return TYPE_CODES.get(code);
}
return null;
}
}
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