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gecko/mobile/android/base/db/LocalBrowserDB.java

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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.db;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Collection;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.mozilla.gecko.AboutPages;
import org.mozilla.gecko.AppConstants;
import org.mozilla.gecko.R;
import org.mozilla.gecko.db.BrowserContract.Bookmarks;
import org.mozilla.gecko.db.BrowserContract.Combined;
import org.mozilla.gecko.db.BrowserContract.ExpirePriority;
import org.mozilla.gecko.db.BrowserContract.Favicons;
import org.mozilla.gecko.db.BrowserContract.History;
import org.mozilla.gecko.db.BrowserContract.ReadingListItems;
import org.mozilla.gecko.db.BrowserContract.SyncColumns;
import org.mozilla.gecko.db.BrowserContract.Thumbnails;
import org.mozilla.gecko.db.BrowserDB.FilterFlags;
import org.mozilla.gecko.distribution.Distribution;
import org.mozilla.gecko.favicons.decoders.FaviconDecoder;
import org.mozilla.gecko.favicons.decoders.LoadFaviconResult;
import org.mozilla.gecko.gfx.BitmapUtils;
import org.mozilla.gecko.mozglue.RobocopTarget;
import org.mozilla.gecko.sync.Utils;
import org.mozilla.gecko.util.GeckoJarReader;
import android.content.ContentProviderOperation;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.database.ContentObserver;
import android.database.Cursor;
import android.database.CursorWrapper;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.net.Uri;
import android.provider.Browser;
import android.text.TextUtils;
import android.util.Log;
public class LocalBrowserDB {
// Calculate these once, at initialization. isLoggable is too expensive to
// have in-line in each log call.
private static final String LOGTAG = "GeckoLocalBrowserDB";
private static final Integer FAVICON_ID_NOT_FOUND = Integer.MIN_VALUE;
private static final boolean logDebug = Log.isLoggable(LOGTAG, Log.DEBUG);
protected static void debug(String message) {
if (logDebug) {
Log.d(LOGTAG, message);
}
}
private final String mProfile;
// Map of folder GUIDs to IDs. Used for caching.
private final HashMap<String, Long> mFolderIdMap;
// Use wrapped Boolean so that we can have a null state
private Boolean mDesktopBookmarksExist;
private final Uri mBookmarksUriWithProfile;
private final Uri mParentsUriWithProfile;
private final Uri mHistoryUriWithProfile;
private final Uri mHistoryExpireUriWithProfile;
private final Uri mCombinedUriWithProfile;
private final Uri mUpdateHistoryUriWithProfile;
private final Uri mFaviconsUriWithProfile;
private final Uri mThumbnailsUriWithProfile;
private final Uri mReadingListUriWithProfile;
private static final String[] DEFAULT_BOOKMARK_COLUMNS =
new String[] { Bookmarks._ID,
Bookmarks.GUID,
Bookmarks.URL,
Bookmarks.TITLE,
Bookmarks.TYPE,
Bookmarks.PARENT };
public LocalBrowserDB(String profile) {
mProfile = profile;
mFolderIdMap = new HashMap<String, Long>();
mBookmarksUriWithProfile = appendProfile(Bookmarks.CONTENT_URI);
mParentsUriWithProfile = appendProfile(Bookmarks.PARENTS_CONTENT_URI);
mHistoryUriWithProfile = appendProfile(History.CONTENT_URI);
mHistoryExpireUriWithProfile = appendProfile(History.CONTENT_OLD_URI);
mCombinedUriWithProfile = appendProfile(Combined.CONTENT_URI);
mFaviconsUriWithProfile = appendProfile(Favicons.CONTENT_URI);
mThumbnailsUriWithProfile = appendProfile(Thumbnails.CONTENT_URI);
mReadingListUriWithProfile = appendProfile(ReadingListItems.CONTENT_URI);
mUpdateHistoryUriWithProfile = mHistoryUriWithProfile.buildUpon().
appendQueryParameter(BrowserContract.PARAM_INCREMENT_VISITS, "true").
appendQueryParameter(BrowserContract.PARAM_INSERT_IF_NEEDED, "true").build();
}
/**
* Not thread safe. A helper to allocate new IDs for arbitrary strings.
*/
private static class NameCounter {
private final HashMap<String, Integer> names = new HashMap<String, Integer>();
private int counter;
private final int increment;
public NameCounter(int start, int increment) {
this.counter = start;
this.increment = increment;
}
public int get(final String name) {
Integer mapping = names.get(name);
if (mapping == null) {
int ours = counter;
counter += increment;
names.put(name, ours);
return ours;
}
return mapping;
}
public boolean has(final String name) {
return names.containsKey(name);
}
}
/**
* Add default bookmarks to the database.
* Takes an offset; returns a new offset.
*/
public int addDefaultBookmarks(Context context, ContentResolver cr, final int offset) {
long folderID = getFolderIdFromGuid(cr, Bookmarks.MOBILE_FOLDER_GUID);
if (folderID == -1L) {
Log.e(LOGTAG, "No mobile folder: cannot add default bookmarks.");
return offset;
}
// Use reflection to walk the set of bookmark defaults.
// This is horrible.
final Class<?> stringsClass = R.string.class;
final Field[] fields = stringsClass.getFields();
final Pattern p = Pattern.compile("^bookmarkdefaults_title_");
int pos = offset;
final long now = System.currentTimeMillis();
final ArrayList<ContentValues> bookmarkValues = new ArrayList<ContentValues>();
final ArrayList<ContentValues> faviconValues = new ArrayList<ContentValues>();
// Count down from -offset into negative values to get new favicon IDs.
final NameCounter faviconIDs = new NameCounter((-1 - offset), -1);
for (int i = 0; i < fields.length; i++) {
final String name = fields[i].getName();
final Matcher m = p.matcher(name);
if (!m.find()) {
continue;
}
try {
final int titleID = fields[i].getInt(null);
final String title = context.getString(titleID);
final Field urlField = stringsClass.getField(name.replace("_title_", "_url_"));
final int urlID = urlField.getInt(null);
final String url = context.getString(urlID);
final ContentValues bookmarkValue = createBookmark(now, title, url, pos++, folderID);
bookmarkValues.add(bookmarkValue);
Bitmap icon = getDefaultFaviconFromPath(context, name);
if (icon == null) {
icon = getDefaultFaviconFromDrawable(context, name);
}
if (icon == null) {
continue;
}
final ContentValues iconValue = createFavicon(url, icon);
// Assign a reserved negative _id to each new favicon.
// For now, each name is expected to be unique, and duplicate
// icons will be duplicated in the DB. See Bug 1040806 Comment 8.
if (iconValue != null) {
final int faviconID = faviconIDs.get(name);
iconValue.put("_id", faviconID);
bookmarkValue.put(Bookmarks.FAVICON_ID, faviconID);
faviconValues.add(iconValue);
}
} catch (IllegalAccessException e) {
Log.wtf(LOGTAG, "Reflection failure.", e);
} catch (IllegalArgumentException e) {
Log.wtf(LOGTAG, "Reflection failure.", e);
} catch (NoSuchFieldException e) {
Log.wtf(LOGTAG, "Reflection failure.", e);
}
}
if (!faviconValues.isEmpty()) {
try {
cr.bulkInsert(mFaviconsUriWithProfile, faviconValues.toArray(new ContentValues[faviconValues.size()]));
} catch (Exception e) {
Log.e(LOGTAG, "Error bulk-inserting default favicons.", e);
}
}
if (!bookmarkValues.isEmpty()) {
try {
final int inserted = cr.bulkInsert(mBookmarksUriWithProfile, bookmarkValues.toArray(new ContentValues[bookmarkValues.size()]));
return offset + inserted;
} catch (Exception e) {
Log.e(LOGTAG, "Error bulk-inserting default bookmarks.", e);
}
}
return offset;
}
/**
* Add bookmarks from the provided distribution.
* Takes an offset; returns a new offset.
*/
public int addDistributionBookmarks(ContentResolver cr, Distribution distribution, int offset) {
if (!distribution.exists()) {
Log.d(LOGTAG, "No distribution from which to add bookmarks.");
return offset;
}
final JSONArray bookmarks = distribution.getBookmarks();
if (bookmarks == null) {
Log.d(LOGTAG, "No distribution bookmarks.");
return offset;
}
long folderId = getFolderIdFromGuid(cr, Bookmarks.MOBILE_FOLDER_GUID);
if (folderId == -1L) {
Log.e(LOGTAG, "No mobile folder: cannot add distribution bookmarks.");
return offset;
}
final Locale locale = Locale.getDefault();
final long now = System.currentTimeMillis();
int mobilePos = offset;
int pinnedPos = 0; // Assume nobody has pinned anything yet.
final ArrayList<ContentValues> bookmarkValues = new ArrayList<ContentValues>();
final ArrayList<ContentValues> faviconValues = new ArrayList<ContentValues>();
// Count down from -offset into negative values to get new favicon IDs.
final NameCounter faviconIDs = new NameCounter((-1 - offset), -1);
for (int i = 0; i < bookmarks.length(); i++) {
try {
final JSONObject bookmark = bookmarks.getJSONObject(i);
final String title = getLocalizedProperty(bookmark, "title", locale);
final String url = getLocalizedProperty(bookmark, "url", locale);
final long parent;
final int pos;
if (bookmark.has("pinned")) {
parent = Bookmarks.FIXED_PINNED_LIST_ID;
pos = pinnedPos++;
} else {
parent = folderId;
pos = mobilePos++;
}
final ContentValues bookmarkValue = createBookmark(now, title, url, pos, parent);
bookmarkValues.add(bookmarkValue);
// Return early if there is no icon for this bookmark.
if (!bookmark.has("icon")) {
continue;
}
try {
final String iconData = bookmark.getString("icon");
final Bitmap icon = BitmapUtils.getBitmapFromDataURI(iconData);
if (icon == null) {
continue;
}
final ContentValues iconValue = createFavicon(url, icon);
if (iconValue == null) {
continue;
}
/*
* Find out if this icon is a duplicate. If it is, don't try
* to insert it again, but reuse the shared ID.
* Otherwise, assign a new reserved negative _id.
* Duplicates won't be detected in default bookmarks, or
* those already in the database.
*/
final boolean seen = faviconIDs.has(iconData);
final int faviconID = faviconIDs.get(iconData);
iconValue.put("_id", faviconID);
bookmarkValue.put(Bookmarks.FAVICON_ID, faviconID);
if (!seen) {
faviconValues.add(iconValue);
}
} catch (JSONException e) {
Log.e(LOGTAG, "Error creating distribution bookmark icon.", e);
}
} catch (JSONException e) {
Log.e(LOGTAG, "Error creating distribution bookmark.", e);
}
}
if (!faviconValues.isEmpty()) {
try {
cr.bulkInsert(mFaviconsUriWithProfile, faviconValues.toArray(new ContentValues[faviconValues.size()]));
} catch (Exception e) {
Log.e(LOGTAG, "Error bulk-inserting distribution favicons.", e);
}
}
if (!bookmarkValues.isEmpty()) {
try {
final int inserted = cr.bulkInsert(mBookmarksUriWithProfile, bookmarkValues.toArray(new ContentValues[bookmarkValues.size()]));
return offset + inserted;
} catch (Exception e) {
Log.e(LOGTAG, "Error bulk-inserting distribution bookmarks.", e);
}
}
return offset;
}
private static ContentValues createBookmark(final long timestamp, final String title, final String url, final int pos, final long parent) {
final ContentValues v = new ContentValues();
v.put(Bookmarks.DATE_CREATED, timestamp);
v.put(Bookmarks.DATE_MODIFIED, timestamp);
v.put(Bookmarks.GUID, Utils.generateGuid());
v.put(Bookmarks.PARENT, parent);
v.put(Bookmarks.POSITION, pos);
v.put(Bookmarks.TITLE, title);
v.put(Bookmarks.URL, url);
return v;
}
private static ContentValues createFavicon(final String url, final Bitmap icon) {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
ContentValues iconValues = new ContentValues();
iconValues.put(Favicons.PAGE_URL, url);
byte[] data = null;
if (icon.compress(Bitmap.CompressFormat.PNG, 100, stream)) {
data = stream.toByteArray();
} else {
Log.w(LOGTAG, "Favicon compression failed.");
return null;
}
iconValues.put(Favicons.DATA, data);
return iconValues;
}
private static String getLocalizedProperty(final JSONObject bookmark, final String property, final Locale locale) throws JSONException {
// Try the full locale.
final String fullLocale = property + "." + locale.toString();
if (bookmark.has(fullLocale)) {
return bookmark.getString(fullLocale);
}
// Try without a variant.
if (!TextUtils.isEmpty(locale.getVariant())) {
String noVariant = fullLocale.substring(0, fullLocale.lastIndexOf("_"));
if (bookmark.has(noVariant)) {
return bookmark.getString(noVariant);
}
}
// Try just the language.
String lang = property + "." + locale.getLanguage();
if (bookmark.has(lang)) {
return bookmark.getString(lang);
}
// Default to the non-localized property name.
return bookmark.getString(property);
}
private static Bitmap getDefaultFaviconFromPath(Context context, String name) {
Class<?> stringClass = R.string.class;
try {
// Look for a drawable with the id R.drawable.bookmarkdefaults_favicon_*
Field faviconField = stringClass.getField(name.replace("_title_", "_favicon_"));
if (faviconField == null) {
return null;
}
int faviconId = faviconField.getInt(null);
String path = context.getString(faviconId);
String apkPath = context.getPackageResourcePath();
File apkFile = new File(apkPath);
String bitmapPath = "jar:jar:" + apkFile.toURI() + "!/" + AppConstants.OMNIJAR_NAME + "!/" + path;
return GeckoJarReader.getBitmap(context.getResources(), bitmapPath);
} catch (java.lang.IllegalAccessException ex) {
Log.e(LOGTAG, "[Path] Can't create favicon " + name, ex);
} catch (java.lang.NoSuchFieldException ex) {
// If the field does not exist, that means we intend to load via a drawable.
}
return null;
}
private static Bitmap getDefaultFaviconFromDrawable(Context context, String name) {
Class<?> drawablesClass = R.drawable.class;
try {
// Look for a drawable with the id R.drawable.bookmarkdefaults_favicon_*
Field faviconField = drawablesClass.getField(name.replace("_title_", "_favicon_"));
if (faviconField == null) {
return null;
}
int faviconId = faviconField.getInt(null);
return BitmapUtils.decodeResource(context, faviconId);
} catch (java.lang.IllegalAccessException ex) {
Log.e(LOGTAG, "[Drawable] Can't create favicon " + name, ex);
} catch (java.lang.NoSuchFieldException ex) {
Log.wtf(LOGTAG, "No field, and presumably no drawable, for " + name);
}
return null;
}
// Invalidate cached data
public void invalidateCachedState() {
mDesktopBookmarksExist = null;
}
private Uri bookmarksUriWithLimit(int limit) {
return mBookmarksUriWithProfile.buildUpon().appendQueryParameter(BrowserContract.PARAM_LIMIT,
String.valueOf(limit)).build();
}
private Uri combinedUriWithLimit(int limit) {
return mCombinedUriWithProfile.buildUpon().appendQueryParameter(BrowserContract.PARAM_LIMIT,
String.valueOf(limit)).build();
}
private Uri appendProfile(Uri uri) {
return uri.buildUpon().appendQueryParameter(BrowserContract.PARAM_PROFILE, mProfile).build();
}
private Uri getAllBookmarksUri() {
Uri.Builder uriBuilder = mBookmarksUriWithProfile.buildUpon()
.appendQueryParameter(BrowserContract.PARAM_SHOW_DELETED, "1");
return uriBuilder.build();
}
private Uri getAllHistoryUri() {
Uri.Builder uriBuilder = mHistoryUriWithProfile.buildUpon()
.appendQueryParameter(BrowserContract.PARAM_SHOW_DELETED, "1");
return uriBuilder.build();
}
private Uri getAllFaviconsUri() {
Uri.Builder uriBuilder = mFaviconsUriWithProfile.buildUpon()
.appendQueryParameter(BrowserContract.PARAM_SHOW_DELETED, "1");
return uriBuilder.build();
}
private Cursor filterAllSites(ContentResolver cr, String[] projection, CharSequence constraint,
int limit, CharSequence urlFilter, String selection, String[] selectionArgs) {
// The combined history/bookmarks selection queries for sites with a url or title containing
// the constraint string(s), treating space-separated words as separate constraints
if (!TextUtils.isEmpty(constraint)) {
String[] constraintWords = constraint.toString().split(" ");
// Only create a filter query with a maximum of 10 constraint words
int constraintCount = Math.min(constraintWords.length, 10);
for (int i = 0; i < constraintCount; i++) {
selection = DBUtils.concatenateWhere(selection, "(" + Combined.URL + " LIKE ? OR " +
Combined.TITLE + " LIKE ?)");
String constraintWord = "%" + constraintWords[i] + "%";
selectionArgs = DBUtils.appendSelectionArgs(selectionArgs,
new String[] { constraintWord, constraintWord });
}
}
if (urlFilter != null) {
selection = DBUtils.concatenateWhere(selection, "(" + Combined.URL + " NOT LIKE ?)");
selectionArgs = DBUtils.appendSelectionArgs(selectionArgs, new String[] { urlFilter.toString() });
}
// Our version of frecency is computed by scaling the number of visits by a multiplier
// that approximates Gaussian decay, based on how long ago the entry was last visited.
// Since we're limited by the math we can do with sqlite, we're calculating this
// approximation using the Cauchy distribution: multiplier = 15^2 / (age^2 + 15^2).
// Using 15 as our scale parameter, we get a constant 15^2 = 225. Following this math,
// frecencyScore = numVisits * max(1, 100 * 225 / (age*age + 225)). (See bug 704977)
// We also give bookmarks an extra bonus boost by adding 100 points to their frecency score.
final String sortOrder = BrowserContract.getFrecencySortOrder(true, false);
return cr.query(combinedUriWithLimit(limit),
projection,
selection,
selectionArgs,
sortOrder);
}
public int getCount(ContentResolver cr, String database) {
int count = 0;
String[] columns = null;
String constraint = null;
Uri uri = null;
if ("history".equals(database)) {
uri = mHistoryUriWithProfile;
columns = new String[] { History._ID };
constraint = Combined.VISITS + " > 0";
} else if ("bookmarks".equals(database)) {
uri = mBookmarksUriWithProfile;
columns = new String[] { Bookmarks._ID };
// ignore folders, tags, keywords, separators, etc.
constraint = Bookmarks.TYPE + " = " + Bookmarks.TYPE_BOOKMARK;
} else if ("thumbnails".equals(database)) {
uri = mThumbnailsUriWithProfile;
columns = new String[] { Thumbnails._ID };
} else if ("favicons".equals(database)) {
uri = mFaviconsUriWithProfile;
columns = new String[] { Favicons._ID };
}
if (uri != null) {
final Cursor cursor = cr.query(uri, columns, constraint, null, null);
try {
count = cursor.getCount();
} finally {
cursor.close();
}
}
debug("Got count " + count + " for " + database);
return count;
}
@RobocopTarget
public Cursor filter(ContentResolver cr, CharSequence constraint, int limit,
EnumSet<FilterFlags> flags) {
String selection = "";
String[] selectionArgs = null;
if (flags.contains(FilterFlags.EXCLUDE_PINNED_SITES)) {
selection = Combined.URL + " NOT IN (SELECT " +
Bookmarks.URL + " FROM bookmarks WHERE " +
DBUtils.qualifyColumn("bookmarks", Bookmarks.PARENT) + " = ? AND " +
DBUtils.qualifyColumn("bookmarks", Bookmarks.IS_DELETED) + " == 0)";
selectionArgs = new String[] { String.valueOf(Bookmarks.FIXED_PINNED_LIST_ID) };
}
return filterAllSites(cr,
new String[] { Combined._ID,
Combined.URL,
Combined.TITLE,
Combined.BOOKMARK_ID,
Combined.HISTORY_ID },
constraint,
limit,
null,
selection, selectionArgs);
}
public Cursor getTopSites(ContentResolver cr, int limit) {
// Filter out unvisited bookmarks and the ones that don't have real
// parents (e.g. pinned sites or reading list items).
String selection = DBUtils.concatenateWhere(Combined.HISTORY_ID + " <> -1",
Combined.URL + " NOT IN (SELECT " +
Bookmarks.URL + " FROM bookmarks WHERE " +
DBUtils.qualifyColumn("bookmarks", Bookmarks.PARENT) + " < ? AND " +
DBUtils.qualifyColumn("bookmarks", Bookmarks.IS_DELETED) + " == 0)");
String[] selectionArgs = new String[] { String.valueOf(Bookmarks.FIXED_ROOT_ID) };
return filterAllSites(cr,
new String[] { Combined._ID,
Combined.URL,
Combined.TITLE,
Combined.BOOKMARK_ID,
Combined.HISTORY_ID },
"",
limit,
AboutPages.URL_FILTER,
selection,
selectionArgs);
}
public void updateVisitedHistory(ContentResolver cr, String uri) {
ContentValues values = new ContentValues();
values.put(History.URL, uri);
values.put(History.DATE_LAST_VISITED, System.currentTimeMillis());
values.put(History.IS_DELETED, 0);
// This will insert a new history entry if one for this URL
// doesn't already exist
cr.update(mUpdateHistoryUriWithProfile,
values,
History.URL + " = ?",
new String[] { uri });
}
public void updateHistoryTitle(ContentResolver cr, String uri, String title) {
ContentValues values = new ContentValues();
values.put(History.TITLE, title);
cr.update(mHistoryUriWithProfile,
values,
History.URL + " = ?",
new String[] { uri });
}
@RobocopTarget
public Cursor getAllVisitedHistory(ContentResolver cr) {
return cr.query(mHistoryUriWithProfile,
new String[] { History.URL },
History.VISITS + " > 0",
null,
null);
}
public Cursor getRecentHistory(ContentResolver cr, int limit) {
return cr.query(combinedUriWithLimit(limit),
new String[] { Combined._ID,
Combined.BOOKMARK_ID,
Combined.HISTORY_ID,
Combined.URL,
Combined.TITLE,
Combined.DATE_LAST_VISITED,
Combined.VISITS },
History.DATE_LAST_VISITED + " > 0",
null,
History.DATE_LAST_VISITED + " DESC");
}
public void expireHistory(ContentResolver cr, ExpirePriority priority) {
Uri url = mHistoryExpireUriWithProfile;
url = url.buildUpon().appendQueryParameter(BrowserContract.PARAM_EXPIRE_PRIORITY, priority.toString()).build();
cr.delete(url, null, null);
}
@RobocopTarget
public void removeHistoryEntry(ContentResolver cr, String url) {
cr.delete(mHistoryUriWithProfile,
History.URL + " = ?",
new String[] { url });
}
public void clearHistory(ContentResolver cr) {
cr.delete(mHistoryUriWithProfile, null, null);
}
@RobocopTarget
public Cursor getBookmarksInFolder(ContentResolver cr, long folderId) {
final boolean addDesktopFolder;
// We always want to show mobile bookmarks in the root view.
if (folderId == Bookmarks.FIXED_ROOT_ID) {
folderId = getFolderIdFromGuid(cr, Bookmarks.MOBILE_FOLDER_GUID);
// We'll add a fake "Desktop Bookmarks" folder to the root view if desktop
// bookmarks exist, so that the user can still access non-mobile bookmarks.
addDesktopFolder = desktopBookmarksExist(cr);
} else {
addDesktopFolder = false;
}
final Cursor c;
if (folderId == Bookmarks.FAKE_DESKTOP_FOLDER_ID) {
// Since the "Desktop Bookmarks" folder doesn't actually exist, we
// just fake it by querying specifically certain known desktop folders.
c = cr.query(mBookmarksUriWithProfile,
DEFAULT_BOOKMARK_COLUMNS,
Bookmarks.GUID + " = ? OR " +
Bookmarks.GUID + " = ? OR " +
Bookmarks.GUID + " = ?",
new String[] { Bookmarks.TOOLBAR_FOLDER_GUID,
Bookmarks.MENU_FOLDER_GUID,
Bookmarks.UNFILED_FOLDER_GUID },
null);
} else {
// Right now, we only support showing folder and bookmark type of
// entries. We should add support for other types though (bug 737024)
c = cr.query(mBookmarksUriWithProfile,
DEFAULT_BOOKMARK_COLUMNS,
Bookmarks.PARENT + " = ? AND " +
"(" + Bookmarks.TYPE + " = ? OR " +
"(" + Bookmarks.TYPE + " = ? AND " + Bookmarks.URL + " IS NOT NULL))",
new String[] { String.valueOf(folderId),
String.valueOf(Bookmarks.TYPE_FOLDER),
String.valueOf(Bookmarks.TYPE_BOOKMARK) },
null);
}
if (addDesktopFolder) {
// Wrap cursor to add fake desktop bookmarks and reading list folders
return new SpecialFoldersCursorWrapper(c, addDesktopFolder);
}
return c;
}
public Cursor getReadingList(ContentResolver cr) {
return cr.query(mReadingListUriWithProfile,
ReadingListItems.DEFAULT_PROJECTION,
null,
null,
null);
}
// Returns true if any desktop bookmarks exist, which will be true if the user
// has set up sync at one point, or done a profile migration from XUL fennec.
private boolean desktopBookmarksExist(ContentResolver cr) {
if (mDesktopBookmarksExist != null) {
return mDesktopBookmarksExist;
}
// Check to see if there are any bookmarks in one of our three
// fixed "Desktop Bookmarks" folders.
final Cursor c = cr.query(bookmarksUriWithLimit(1),
new String[] { Bookmarks._ID },
Bookmarks.PARENT + " = ? OR " +
Bookmarks.PARENT + " = ? OR " +
Bookmarks.PARENT + " = ?",
new String[] { String.valueOf(getFolderIdFromGuid(cr, Bookmarks.TOOLBAR_FOLDER_GUID)),
String.valueOf(getFolderIdFromGuid(cr, Bookmarks.MENU_FOLDER_GUID)),
String.valueOf(getFolderIdFromGuid(cr, Bookmarks.UNFILED_FOLDER_GUID)) },
null);
try {
mDesktopBookmarksExist = c.getCount() > 0;
} finally {
c.close();
}
return mDesktopBookmarksExist;
}
@RobocopTarget
public boolean isBookmark(ContentResolver cr, String uri) {
final Cursor c = cr.query(bookmarksUriWithLimit(1),
new String[] { Bookmarks._ID },
Bookmarks.URL + " = ? AND " + Bookmarks.PARENT + " != ?",
new String[] { uri, String.valueOf(Bookmarks.FIXED_PINNED_LIST_ID) },
Bookmarks.URL);
if (c == null) {
Log.e(LOGTAG, "Null cursor in isBookmark");
return false;
}
try {
return c.getCount() > 0;
} finally {
c.close();
}
}
public boolean isReadingListItem(ContentResolver cr, String uri) {
final Cursor c = cr.query(mReadingListUriWithProfile,
new String[] { ReadingListItems._ID },
ReadingListItems.URL + " = ? ",
new String[] { uri },
null);
if (c == null) {
Log.e(LOGTAG, "Null cursor in isReadingListItem");
return false;
}
try {
return c.getCount() > 0;
} finally {
c.close();
}
}
public String getUrlForKeyword(ContentResolver cr, String keyword) {
final Cursor c = cr.query(mBookmarksUriWithProfile,
new String[] { Bookmarks.URL },
Bookmarks.KEYWORD + " = ?",
new String[] { keyword },
null);
try {
if (!c.moveToFirst()) {
return null;
}
return c.getString(c.getColumnIndexOrThrow(Bookmarks.URL));
} finally {
c.close();
}
}
private synchronized long getFolderIdFromGuid(final ContentResolver cr, final String guid) {
if (mFolderIdMap.containsKey(guid)) {
return mFolderIdMap.get(guid);
}
final Cursor c = cr.query(mBookmarksUriWithProfile,
new String[] { Bookmarks._ID },
Bookmarks.GUID + " = ?",
new String[] { guid },
null);
try {
final int col = c.getColumnIndexOrThrow(Bookmarks._ID);
if (!c.moveToFirst() || c.isNull(col)) {
return -1;
}
final long id = c.getLong(col);
mFolderIdMap.put(guid, id);
return id;
} finally {
c.close();
}
}
/**
* Find parents of records that match the provided criteria, and bump their
* modified timestamp.
*/
protected void bumpParents(ContentResolver cr, String param, String value) {
ContentValues values = new ContentValues();
values.put(Bookmarks.DATE_MODIFIED, System.currentTimeMillis());
String where = param + " = ?";
String[] args = new String[] { value };
int updated = cr.update(mParentsUriWithProfile, values, where, args);
debug("Updated " + updated + " rows to new modified time.");
}
private void addBookmarkItem(ContentResolver cr, String title, String uri, long folderId) {
final long now = System.currentTimeMillis();
ContentValues values = new ContentValues();
if (title != null) {
values.put(Browser.BookmarkColumns.TITLE, title);
}
values.put(Bookmarks.URL, uri);
values.put(Bookmarks.PARENT, folderId);
values.put(Bookmarks.DATE_MODIFIED, now);
// Get the page's favicon ID from the history table
final Cursor c = cr.query(mHistoryUriWithProfile,
new String[] { History.FAVICON_ID },
History.URL + " = ?",
new String[] { uri },
null);
try {
if (c.moveToFirst()) {
int columnIndex = c.getColumnIndexOrThrow(History.FAVICON_ID);
if (!c.isNull(columnIndex)) {
values.put(Bookmarks.FAVICON_ID, c.getLong(columnIndex));
}
}
} finally {
c.close();
}
// Restore deleted record if possible
values.put(Bookmarks.IS_DELETED, 0);
final Uri bookmarksWithInsert = mBookmarksUriWithProfile.buildUpon()
.appendQueryParameter(BrowserContract.PARAM_INSERT_IF_NEEDED, "true")
.build();
cr.update(bookmarksWithInsert,
values,
Bookmarks.URL + " = ? AND " +
Bookmarks.PARENT + " = " + folderId,
new String[] { uri });
// Bump parent modified time using its ID.
debug("Bumping parent modified time for addition to: " + folderId);
final String where = Bookmarks._ID + " = ?";
final String[] args = new String[] { String.valueOf(folderId) };
ContentValues bumped = new ContentValues();
bumped.put(Bookmarks.DATE_MODIFIED, now);
final int updated = cr.update(mBookmarksUriWithProfile, bumped, where, args);
debug("Updated " + updated + " rows to new modified time.");
}
@RobocopTarget
public void addBookmark(ContentResolver cr, String title, String uri) {
long folderId = getFolderIdFromGuid(cr, Bookmarks.MOBILE_FOLDER_GUID);
addBookmarkItem(cr, title, uri, folderId);
}
@RobocopTarget
public void removeBookmarksWithURL(ContentResolver cr, String uri) {
Uri contentUri = mBookmarksUriWithProfile;
// Do this now so that the items still exist!
bumpParents(cr, Bookmarks.URL, uri);
final String[] urlArgs = new String[] { uri, String.valueOf(Bookmarks.FIXED_PINNED_LIST_ID) };
final String urlEquals = Bookmarks.URL + " = ? AND " + Bookmarks.PARENT + " != ? ";
cr.delete(contentUri, urlEquals, urlArgs);
}
public void addReadingListItem(ContentResolver cr, ContentValues values) {
// Check that required fields are present.
for (String field: ReadingListItems.REQUIRED_FIELDS) {
if (!values.containsKey(field)) {
throw new IllegalArgumentException("Missing required field for reading list item: " + field);
}
}
// Clear delete flag if necessary
values.put(ReadingListItems.IS_DELETED, 0);
// Restore deleted record if possible
final Uri insertUri = mReadingListUriWithProfile
.buildUpon()
.appendQueryParameter(BrowserContract.PARAM_INSERT_IF_NEEDED, "true")
.build();
final int updated = cr.update(insertUri,
values,
ReadingListItems.URL + " = ? ",
new String[] { values.getAsString(ReadingListItems.URL) });
debug("Updated " + updated + " rows to new modified time.");
}
public void removeReadingListItemWithURL(ContentResolver cr, String uri) {
cr.delete(mReadingListUriWithProfile, ReadingListItems.URL + " = ? ", new String[] { uri });
}
public void registerBookmarkObserver(ContentResolver cr, ContentObserver observer) {
cr.registerContentObserver(mBookmarksUriWithProfile, false, observer);
}
@RobocopTarget
public void updateBookmark(ContentResolver cr, int id, String uri, String title, String keyword) {
ContentValues values = new ContentValues();
values.put(Browser.BookmarkColumns.TITLE, title);
values.put(Bookmarks.URL, uri);
values.put(Bookmarks.KEYWORD, keyword);
values.put(Bookmarks.DATE_MODIFIED, System.currentTimeMillis());
cr.update(mBookmarksUriWithProfile,
values,
Bookmarks._ID + " = ?",
new String[] { String.valueOf(id) });
}
/**
* Get the favicon from the database, if any, associated with the given favicon URL. (That is,
* the URL of the actual favicon image, not the URL of the page with which the favicon is associated.)
* @param cr The ContentResolver to use.
* @param faviconURL The URL of the favicon to fetch from the database.
* @return The decoded Bitmap from the database, if any. null if none is stored.
*/
public LoadFaviconResult getFaviconForUrl(ContentResolver cr, String faviconURL) {
final Cursor c = cr.query(mFaviconsUriWithProfile,
new String[] { Favicons.DATA },
Favicons.URL + " = ? AND " + Favicons.DATA + " IS NOT NULL",
new String[] { faviconURL },
null);
byte[] b = null;
try {
if (!c.moveToFirst()) {
return null;
}
final int faviconIndex = c.getColumnIndexOrThrow(Favicons.DATA);
b = c.getBlob(faviconIndex);
} finally {
c.close();
}
if (b == null) {
return null;
}
return FaviconDecoder.decodeFavicon(b);
}
/**
* Try to find a usable favicon URL in the history or bookmarks table.
*/
public String getFaviconURLFromPageURL(ContentResolver cr, String uri) {
// Check first in the history table.
Cursor c = cr.query(mHistoryUriWithProfile,
new String[] { History.FAVICON_URL },
Combined.URL + " = ?",
new String[] { uri },
null);
try {
if (c.moveToFirst()) {
return c.getString(c.getColumnIndexOrThrow(History.FAVICON_URL));
}
} finally {
c.close();
}
// If that fails, check in the bookmarks table.
c = cr.query(mBookmarksUriWithProfile,
new String[] { Bookmarks.FAVICON_URL },
Bookmarks.URL + " = ?",
new String[] { uri },
null);
try {
if (c.moveToFirst()) {
return c.getString(c.getColumnIndexOrThrow(Bookmarks.FAVICON_URL));
}
return null;
} finally {
c.close();
}
}
public void updateFaviconForUrl(ContentResolver cr, String pageUri,
byte[] encodedFavicon, String faviconUri) {
ContentValues values = new ContentValues();
values.put(Favicons.URL, faviconUri);
values.put(Favicons.PAGE_URL, pageUri);
values.put(Favicons.DATA, encodedFavicon);
// Update or insert
Uri faviconsUri = getAllFaviconsUri().buildUpon().
appendQueryParameter(BrowserContract.PARAM_INSERT_IF_NEEDED, "true").build();
final int updated = cr.update(faviconsUri,
values,
Favicons.URL + " = ?",
new String[] { faviconUri });
if (updated == 0) {
return;
}
// After writing the encodedFavicon, ensure that the favicon_id in both the bookmark and
// history tables are also up-to-date.
final Integer id = getIDForFaviconURL(cr, faviconUri);
if (id == FAVICON_ID_NOT_FOUND) {
return;
}
updateHistoryAndBookmarksFaviconID(cr, pageUri, id);
}
/**
* Locates and returns the favicon ID of a target URL as an Integer.
*/
private Integer getIDForFaviconURL(ContentResolver cr, String faviconURL) {
final Cursor c = cr.query(mFaviconsUriWithProfile,
new String[] { Favicons._ID },
Favicons.URL + " = ? AND " + Favicons.DATA + " IS NOT NULL",
new String[] { faviconURL },
null);
try {
final int col = c.getColumnIndexOrThrow(Favicons._ID);
if (c.moveToFirst() && !c.isNull(col)) {
return c.getInt(col);
}
// IDs can be negative, so we return a sentinel value indicating "not found".
return FAVICON_ID_NOT_FOUND;
} finally {
c.close();
}
}
/**
* Update the favicon ID in the history and bookmark tables after a new
* favicon table entry is added.
*/
private void updateHistoryAndBookmarksFaviconID(ContentResolver cr, String pageURL, int id) {
final ContentValues bookmarkValues = new ContentValues();
bookmarkValues.put(Bookmarks.FAVICON_ID, id);
cr.update(mBookmarksUriWithProfile,
bookmarkValues,
Bookmarks.URL + " = ?",
new String[] { pageURL });
final ContentValues historyValues = new ContentValues();
historyValues.put(History.FAVICON_ID, id);
cr.update(mHistoryUriWithProfile,
historyValues,
History.URL + " = ?",
new String[] { pageURL });
}
public void updateThumbnailForUrl(ContentResolver cr, String uri,
BitmapDrawable thumbnail) {
// If a null thumbnail was passed in, delete the stored thumbnail for this url.
if (thumbnail == null) {
cr.delete(mThumbnailsUriWithProfile, Thumbnails.URL + " == ?", new String[] { uri });
return;
}
Bitmap bitmap = thumbnail.getBitmap();
byte[] data = null;
ByteArrayOutputStream stream = new ByteArrayOutputStream();
if (bitmap.compress(Bitmap.CompressFormat.PNG, 0, stream)) {
data = stream.toByteArray();
} else {
Log.w(LOGTAG, "Favicon compression failed.");
}
ContentValues values = new ContentValues();
values.put(Thumbnails.URL, uri);
values.put(Thumbnails.DATA, data);
Uri thumbnailsUri = mThumbnailsUriWithProfile.buildUpon().
appendQueryParameter(BrowserContract.PARAM_INSERT_IF_NEEDED, "true").build();
cr.update(thumbnailsUri,
values,
Thumbnails.URL + " = ?",
new String[] { uri });
}
@RobocopTarget
public byte[] getThumbnailForUrl(ContentResolver cr, String uri) {
final Cursor c = cr.query(mThumbnailsUriWithProfile,
new String[]{ Thumbnails.DATA },
Thumbnails.URL + " = ? AND " + Thumbnails.DATA + " IS NOT NULL",
new String[]{ uri },
null);
try {
if (!c.moveToFirst()) {
return null;
}
int thumbnailIndex = c.getColumnIndexOrThrow(Thumbnails.DATA);
return c.getBlob(thumbnailIndex);
} finally {
c.close();
}
}
/**
* Query for non-null thumbnails matching the provided <code>urls</code>.
* The returned cursor will have no more than, but possibly fewer than,
* the requested number of thumbnails.
*
* Returns null if the provided list of URLs is empty or null.
*/
public Cursor getThumbnailsForUrls(ContentResolver cr, List<String> urls) {
if (urls == null) {
return null;
}
final int urlCount = urls.size();
if (urlCount == 0) {
return null;
}
// Don't match against null thumbnails.
final String selection = Thumbnails.DATA + " IS NOT NULL AND " +
DBUtils.computeSQLInClause(urlCount, Thumbnails.URL);
final String[] selectionArgs = urls.toArray(new String[urlCount]);
return cr.query(mThumbnailsUriWithProfile,
new String[] { Thumbnails.URL, Thumbnails.DATA },
selection,
selectionArgs,
null);
}
@RobocopTarget
public void removeThumbnails(ContentResolver cr) {
cr.delete(mThumbnailsUriWithProfile, null, null);
}
// Utility function for updating existing history using batch operations
public void updateHistoryInBatch(ContentResolver cr,
Collection<ContentProviderOperation> operations,
String url, String title,
long date, int visits) {
final String[] projection = {
History._ID,
History.VISITS,
History.DATE_LAST_VISITED
};
// We need to get the old visit count.
final Cursor cursor = cr.query(getAllHistoryUri(),
projection,
History.URL + " = ?",
new String[] { url },
null);
try {
ContentValues values = new ContentValues();
// Restore deleted record if possible
values.put(History.IS_DELETED, 0);
if (cursor.moveToFirst()) {
int visitsCol = cursor.getColumnIndexOrThrow(History.VISITS);
int dateCol = cursor.getColumnIndexOrThrow(History.DATE_LAST_VISITED);
int oldVisits = cursor.getInt(visitsCol);
long oldDate = cursor.getLong(dateCol);
values.put(History.VISITS, oldVisits + visits);
// Only update last visited if newer.
if (date > oldDate) {
values.put(History.DATE_LAST_VISITED, date);
}
} else {
values.put(History.VISITS, visits);
values.put(History.DATE_LAST_VISITED, date);
}
if (title != null) {
values.put(History.TITLE, title);
}
values.put(History.URL, url);
Uri historyUri = getAllHistoryUri().buildUpon().
appendQueryParameter(BrowserContract.PARAM_INSERT_IF_NEEDED, "true").build();
// Update or insert
ContentProviderOperation.Builder builder =
ContentProviderOperation.newUpdate(historyUri);
builder.withSelection(History.URL + " = ?", new String[] { url });
builder.withValues(values);
// Queue the operation
operations.add(builder.build());
} finally {
cursor.close();
}
}
public void updateBookmarkInBatch(ContentResolver cr,
Collection<ContentProviderOperation> operations,
String url, String title, String guid,
long parent, long added,
long modified, long position,
String keyword, int type) {
ContentValues values = new ContentValues();
if (title == null && url != null) {
title = url;
}
if (title != null) {
values.put(Bookmarks.TITLE, title);
}
if (url != null) {
values.put(Bookmarks.URL, url);
}
if (guid != null) {
values.put(SyncColumns.GUID, guid);
}
if (keyword != null) {
values.put(Bookmarks.KEYWORD, keyword);
}
if (added > 0) {
values.put(SyncColumns.DATE_CREATED, added);
}
if (modified > 0) {
values.put(SyncColumns.DATE_MODIFIED, modified);
}
values.put(Bookmarks.POSITION, position);
// Restore deleted record if possible
values.put(Bookmarks.IS_DELETED, 0);
// This assumes no "real" folder has a negative ID. Only
// things like the reading list folder do.
if (parent < 0) {
parent = getFolderIdFromGuid(cr, Bookmarks.MOBILE_FOLDER_GUID);
}
values.put(Bookmarks.PARENT, parent);
values.put(Bookmarks.TYPE, type);
Uri bookmarkUri = getAllBookmarksUri().buildUpon().
appendQueryParameter(BrowserContract.PARAM_INSERT_IF_NEEDED, "true").build();
// Update or insert
ContentProviderOperation.Builder builder =
ContentProviderOperation.newUpdate(bookmarkUri);
if (url != null) {
// Bookmarks are defined by their URL and Folder.
builder.withSelection(Bookmarks.URL + " = ? AND "
+ Bookmarks.PARENT + " = ?",
new String[] { url,
Long.toString(parent)
});
} else if (title != null) {
// Or their title and parent folder. (Folders!)
builder.withSelection(Bookmarks.TITLE + " = ? AND "
+ Bookmarks.PARENT + " = ?",
new String[] { title,
Long.toString(parent)
});
} else if (type == Bookmarks.TYPE_SEPARATOR) {
// Or their their position (separators)
builder.withSelection(Bookmarks.POSITION + " = ? AND "
+ Bookmarks.PARENT + " = ?",
new String[] { Long.toString(position),
Long.toString(parent)
});
} else {
Log.e(LOGTAG, "Bookmark entry without url or title and not a separator, not added.");
}
builder.withValues(values);
// Queue the operation
operations.add(builder.build());
}
public void updateFaviconInBatch(ContentResolver cr,
Collection<ContentProviderOperation> operations,
String url, String faviconUrl,
String faviconGuid, byte[] data) {
ContentValues values = new ContentValues();
values.put(Favicons.DATA, data);
values.put(Favicons.PAGE_URL, url);
if (faviconUrl != null) {
values.put(Favicons.URL, faviconUrl);
}
// Update or insert
Uri faviconsUri = getAllFaviconsUri().buildUpon().
appendQueryParameter(BrowserContract.PARAM_INSERT_IF_NEEDED, "true").build();
// Update or insert
ContentProviderOperation.Builder builder =
ContentProviderOperation.newUpdate(faviconsUri);
builder.withValues(values);
builder.withSelection(Favicons.PAGE_URL + " = ?", new String[] { url });
// Queue the operation
operations.add(builder.build());
}
// This wrapper adds a fake "Desktop Bookmarks" folder entry to the
// beginning of the cursor's data set.
private static class SpecialFoldersCursorWrapper extends CursorWrapper {
private int mIndexOffset;
private int mDesktopBookmarksIndex = -1;
private boolean mAtDesktopBookmarksPosition;
public SpecialFoldersCursorWrapper(Cursor c, boolean showDesktopBookmarks) {
super(c);
if (showDesktopBookmarks) {
mDesktopBookmarksIndex = mIndexOffset;
mIndexOffset++;
}
}
@Override
public int getCount() {
return super.getCount() + mIndexOffset;
}
@Override
public boolean moveToPosition(int position) {
mAtDesktopBookmarksPosition = (mDesktopBookmarksIndex == position);
if (mAtDesktopBookmarksPosition) {
return true;
}
return super.moveToPosition(position - mIndexOffset);
}
@Override
public long getLong(int columnIndex) {
if (!mAtDesktopBookmarksPosition) {
return super.getLong(columnIndex);
}
if (columnIndex == getColumnIndex(Bookmarks.PARENT)) {
return Bookmarks.FIXED_ROOT_ID;
}
return -1;
}
@Override
public int getInt(int columnIndex) {
if (!mAtDesktopBookmarksPosition) {
return super.getInt(columnIndex);
}
if (columnIndex == getColumnIndex(Bookmarks._ID) && mAtDesktopBookmarksPosition) {
return Bookmarks.FAKE_DESKTOP_FOLDER_ID;
}
if (columnIndex == getColumnIndex(Bookmarks.TYPE)) {
return Bookmarks.TYPE_FOLDER;
}
return -1;
}
@Override
public String getString(int columnIndex) {
if (!mAtDesktopBookmarksPosition) {
return super.getString(columnIndex);
}
if (columnIndex == getColumnIndex(Bookmarks.GUID) && mAtDesktopBookmarksPosition) {
return Bookmarks.FAKE_DESKTOP_FOLDER_GUID;
}
return "";
}
}
public void pinSite(ContentResolver cr, String url, String title, int position) {
ContentValues values = new ContentValues();
final long now = System.currentTimeMillis();
values.put(Bookmarks.TITLE, title);
values.put(Bookmarks.URL, url);
values.put(Bookmarks.PARENT, Bookmarks.FIXED_PINNED_LIST_ID);
values.put(Bookmarks.DATE_MODIFIED, now);
values.put(Bookmarks.POSITION, position);
values.put(Bookmarks.IS_DELETED, 0);
// We do an update-and-replace here without deleting any existing pins for the given URL.
// That means if the user pins a URL, then edits another thumbnail to use the same URL,
// we'll end up with two pins for that site. This is the intended behavior, which
// incidentally saves us a delete query.
Uri uri = mBookmarksUriWithProfile.buildUpon()
.appendQueryParameter(BrowserContract.PARAM_INSERT_IF_NEEDED, "true").build();
cr.update(uri,
values,
Bookmarks.POSITION + " = ? AND " +
Bookmarks.PARENT + " = ?",
new String[] { Integer.toString(position),
String.valueOf(Bookmarks.FIXED_PINNED_LIST_ID) });
}
public Cursor getPinnedSites(ContentResolver cr, int limit) {
return cr.query(bookmarksUriWithLimit(limit),
new String[] { Bookmarks._ID,
Bookmarks.URL,
Bookmarks.TITLE,
Bookmarks.POSITION },
Bookmarks.PARENT + " == ?",
new String[] { String.valueOf(Bookmarks.FIXED_PINNED_LIST_ID) },
Bookmarks.POSITION + " ASC");
}
public void unpinSite(ContentResolver cr, int position) {
cr.delete(mBookmarksUriWithProfile,
Bookmarks.PARENT + " == ? AND " + Bookmarks.POSITION + " = ?",
new String[] {
String.valueOf(Bookmarks.FIXED_PINNED_LIST_ID),
Integer.toString(position)
});
}
@RobocopTarget
public Cursor getBookmarkForUrl(ContentResolver cr, String url) {
Cursor c = cr.query(bookmarksUriWithLimit(1),
new String[] { Bookmarks._ID,
Bookmarks.URL,
Bookmarks.TITLE,
Bookmarks.KEYWORD },
Bookmarks.URL + " = ?",
new String[] { url },
null);
if (c != null && c.getCount() == 0) {
c.close();
c = null;
}
return c;
}
}
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