/*
* Copyright (C) 2013 The Android Open Source Project
*
* 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 com.android.documentsui;
import static com.android.documentsui.model.DocumentInfo.getCursorString;
import android.content.ContentProvider;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.content.UriMatcher;
import android.content.pm.ResolveInfo;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.net.Uri;
import android.os.Bundle;
import android.provider.DocumentsContract;
import android.provider.DocumentsContract.Document;
import android.provider.DocumentsContract.Root;
import android.text.format.DateUtils;
import android.util.Log;
import com.android.documentsui.model.DocumentStack;
import com.android.documentsui.model.DurableUtils;
import com.android.internal.util.Predicate;
import com.google.android.collect.Sets;
import libcore.io.IoUtils;
import java.io.IOException;
import java.util.Set;
public class RecentsProvider extends ContentProvider {
private static final String TAG = "RecentsProvider";
private static final long MAX_HISTORY_IN_MILLIS = 45 * DateUtils.DAY_IN_MILLIS;
private static final String AUTHORITY = "com.android.documentsui.recents";
private static final UriMatcher sMatcher = new UriMatcher(UriMatcher.NO_MATCH);
private static final int URI_RECENT = 1;
private static final int URI_STATE = 2;
private static final int URI_RESUME = 3;
public static final String METHOD_PURGE = "purge";
public static final String METHOD_PURGE_PACKAGE = "purgePackage";
static {
sMatcher.addURI(AUTHORITY, "recent", URI_RECENT);
// state/authority/rootId/docId
sMatcher.addURI(AUTHORITY, "state/*/*/*", URI_STATE);
// resume/packageName
sMatcher.addURI(AUTHORITY, "resume/*", URI_RESUME);
}
public static final String TABLE_RECENT = "recent";
public static final String TABLE_STATE = "state";
public static final String TABLE_RESUME = "resume";
public static class RecentColumns {
public static final String KEY = "key";
public static final String STACK = "stack";
public static final String TIMESTAMP = "timestamp";
}
public static class StateColumns {
public static final String AUTHORITY = "authority";
public static final String ROOT_ID = Root.COLUMN_ROOT_ID;
public static final String DOCUMENT_ID = Document.COLUMN_DOCUMENT_ID;
public static final String MODE = "mode";
public static final String SORT_ORDER = "sortOrder";
}
public static class ResumeColumns {
public static final String PACKAGE_NAME = "package_name";
public static final String STACK = "stack";
public static final String TIMESTAMP = "timestamp";
public static final String EXTERNAL = "external";
}
public static Uri buildRecent() {
return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT)
.authority(AUTHORITY).appendPath("recent").build();
}
public static Uri buildState(String authority, String rootId, String documentId) {
return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT).authority(AUTHORITY)
.appendPath("state").appendPath(authority).appendPath(rootId).appendPath(documentId)
.build();
}
public static Uri buildResume(String packageName) {
return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT)
.authority(AUTHORITY).appendPath("resume").appendPath(packageName).build();
}
private DatabaseHelper mHelper;
private static class DatabaseHelper extends SQLiteOpenHelper {
private static final String DB_NAME = "recents.db";
private static final int VERSION_INIT = 1;
private static final int VERSION_AS_BLOB = 3;
private static final int VERSION_ADD_EXTERNAL = 4;
private static final int VERSION_ADD_RECENT_KEY = 5;
public DatabaseHelper(Context context) {
super(context, DB_NAME, null, VERSION_ADD_RECENT_KEY);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE " + TABLE_RECENT + " (" +
RecentColumns.KEY + " TEXT PRIMARY KEY ON CONFLICT REPLACE," +
RecentColumns.STACK + " BLOB DEFAULT NULL," +
RecentColumns.TIMESTAMP + " INTEGER" +
")");
db.execSQL("CREATE TABLE " + TABLE_STATE + " (" +
StateColumns.AUTHORITY + " TEXT," +
StateColumns.ROOT_ID + " TEXT," +
StateColumns.DOCUMENT_ID + " TEXT," +
StateColumns.MODE + " INTEGER," +
StateColumns.SORT_ORDER + " INTEGER," +
"PRIMARY KEY (" + StateColumns.AUTHORITY + ", " + StateColumns.ROOT_ID + ", "
+ StateColumns.DOCUMENT_ID + ")" +
")");
db.execSQL("CREATE TABLE " + TABLE_RESUME + " (" +
ResumeColumns.PACKAGE_NAME + " TEXT NOT NULL PRIMARY KEY," +
ResumeColumns.STACK + " BLOB DEFAULT NULL," +
ResumeColumns.TIMESTAMP + " INTEGER," +
ResumeColumns.EXTERNAL + " INTEGER NOT NULL DEFAULT 0" +
")");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
Log.w(TAG, "Upgrading database; wiping app data");
db.execSQL("DROP TABLE IF EXISTS " + TABLE_RECENT);
db.execSQL("DROP TABLE IF EXISTS " + TABLE_STATE);
db.execSQL("DROP TABLE IF EXISTS " + TABLE_RESUME);
onCreate(db);
}
}
@Override
public boolean onCreate() {
mHelper = new DatabaseHelper(getContext());
return true;
}
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
String sortOrder) {
final SQLiteDatabase db = mHelper.getReadableDatabase();
switch (sMatcher.match(uri)) {
case URI_RECENT:
final long cutoff = System.currentTimeMillis() - MAX_HISTORY_IN_MILLIS;
return db.query(TABLE_RECENT, projection, RecentColumns.TIMESTAMP + ">" + cutoff,
null, null, null, sortOrder);
case URI_STATE:
final String authority = uri.getPathSegments().get(1);
final String rootId = uri.getPathSegments().get(2);
final String documentId = uri.getPathSegments().get(3);
return db.query(TABLE_STATE, projection, StateColumns.AUTHORITY + "=? AND "
+ StateColumns.ROOT_ID + "=? AND " + StateColumns.DOCUMENT_ID + "=?",
new String[] { authority, rootId, documentId }, null, null, sortOrder);
case URI_RESUME:
final String packageName = uri.getPathSegments().get(1);
return db.query(TABLE_RESUME, projection, ResumeColumns.PACKAGE_NAME + "=?",
new String[] { packageName }, null, null, sortOrder);
default:
throw new UnsupportedOperationException("Unsupported Uri " + uri);
}
}
@Override
public String getType(Uri uri) {
return null;
}
@Override
public Uri insert(Uri uri, ContentValues values) {
final SQLiteDatabase db = mHelper.getWritableDatabase();
final ContentValues key = new ContentValues();
switch (sMatcher.match(uri)) {
case URI_RECENT:
values.put(RecentColumns.TIMESTAMP, System.currentTimeMillis());
db.insert(TABLE_RECENT, null, values);
final long cutoff = System.currentTimeMillis() - MAX_HISTORY_IN_MILLIS;
db.delete(TABLE_RECENT, RecentColumns.TIMESTAMP + "<" + cutoff, null);
return uri;
case URI_STATE:
final String authority = uri.getPathSegments().get(1);
final String rootId = uri.getPathSegments().get(2);
final String documentId = uri.getPathSegments().get(3);
key.put(StateColumns.AUTHORITY, authority);
key.put(StateColumns.ROOT_ID, rootId);
key.put(StateColumns.DOCUMENT_ID, documentId);
// Ensure that row exists, then update with changed values
db.insertWithOnConflict(TABLE_STATE, null, key, SQLiteDatabase.CONFLICT_IGNORE);
db.update(TABLE_STATE, values, StateColumns.AUTHORITY + "=? AND "
+ StateColumns.ROOT_ID + "=? AND " + StateColumns.DOCUMENT_ID + "=?",
new String[] { authority, rootId, documentId });
return uri;
case URI_RESUME:
values.put(ResumeColumns.TIMESTAMP, System.currentTimeMillis());
final String packageName = uri.getPathSegments().get(1);
key.put(ResumeColumns.PACKAGE_NAME, packageName);
// Ensure that row exists, then update with changed values
db.insertWithOnConflict(TABLE_RESUME, null, key, SQLiteDatabase.CONFLICT_IGNORE);
db.update(TABLE_RESUME, values, ResumeColumns.PACKAGE_NAME + "=?",
new String[] { packageName });
return uri;
default:
throw new UnsupportedOperationException("Unsupported Uri " + uri);
}
}
@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
throw new UnsupportedOperationException("Unsupported Uri " + uri);
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
throw new UnsupportedOperationException("Unsupported Uri " + uri);
}
@Override
public Bundle call(String method, String arg, Bundle extras) {
if (METHOD_PURGE.equals(method)) {
// Purge references to unknown authorities
final Intent intent = new Intent(DocumentsContract.PROVIDER_INTERFACE);
final Set<String> knownAuth = Sets.newHashSet();
for (ResolveInfo info : getContext()
.getPackageManager().queryIntentContentProviders(intent, 0)) {
knownAuth.add(info.providerInfo.authority);
}
purgeByAuthority(new Predicate<String>() {
@Override
public boolean apply(String authority) {
// Purge unknown authorities
return !knownAuth.contains(authority);
}
});
return null;
} else if (METHOD_PURGE_PACKAGE.equals(method)) {
// Purge references to authorities in given package
final Intent intent = new Intent(DocumentsContract.PROVIDER_INTERFACE);
intent.setPackage(arg);
final Set<String> packageAuth = Sets.newHashSet();
for (ResolveInfo info : getContext()
.getPackageManager().queryIntentContentProviders(intent, 0)) {
packageAuth.add(info.providerInfo.authority);
}
if (!packageAuth.isEmpty()) {
purgeByAuthority(new Predicate<String>() {
@Override
public boolean apply(String authority) {
// Purge authority matches
return packageAuth.contains(authority);
}
});
}
return null;
} else {
return super.call(method, arg, extras);
}
}
/**
* Purge all internal data whose authority matches the given
* {@link Predicate}.
*/
private void purgeByAuthority(Predicate<String> predicate) {
final SQLiteDatabase db = mHelper.getWritableDatabase();
final DocumentStack stack = new DocumentStack();
Cursor cursor = db.query(TABLE_RECENT, null, null, null, null, null, null);
try {
while (cursor.moveToNext()) {
try {
final byte[] rawStack = cursor.getBlob(
cursor.getColumnIndex(RecentColumns.STACK));
DurableUtils.readFromArray(rawStack, stack);
if (stack.root != null && predicate.apply(stack.root.authority)) {
final String key = getCursorString(cursor, RecentColumns.KEY);
db.delete(TABLE_RECENT, RecentColumns.KEY + "=?", new String[] { key });
}
} catch (IOException ignored) {
}
}
} finally {
IoUtils.closeQuietly(cursor);
}
cursor = db.query(TABLE_STATE, new String[] {
StateColumns.AUTHORITY }, null, null, StateColumns.AUTHORITY, null, null);
try {
while (cursor.moveToNext()) {
final String authority = getCursorString(cursor, StateColumns.AUTHORITY);
if (predicate.apply(authority)) {
db.delete(TABLE_STATE, StateColumns.AUTHORITY + "=?", new String[] {
authority });
Log.d(TAG, "Purged state for " + authority);
}
}
} finally {
IoUtils.closeQuietly(cursor);
}
cursor = db.query(TABLE_RESUME, null, null, null, null, null, null);
try {
while (cursor.moveToNext()) {
try {
final byte[] rawStack = cursor.getBlob(
cursor.getColumnIndex(ResumeColumns.STACK));
DurableUtils.readFromArray(rawStack, stack);
if (stack.root != null && predicate.apply(stack.root.authority)) {
final String packageName = getCursorString(
cursor, ResumeColumns.PACKAGE_NAME);
db.delete(TABLE_RESUME, ResumeColumns.PACKAGE_NAME + "=?",
new String[] { packageName });
}
} catch (IOException ignored) {
}
}
} finally {
IoUtils.closeQuietly(cursor);
}
}
}
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