Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/bookmarkimport/AndroidBrowserProviderIterator.java

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.bookmarkimport;
+
+import android.content.ContentProviderClient;
+import android.content.ContentResolver;
+import android.database.Cursor;
+import android.provider.Browser;
+import android.provider.Browser.BookmarkColumns;
+
+import java.util.NoSuchElementException;
+
+/**
+ * Imports bookmarks from Android Browser using the public provider API.
+ */
+class AndroidBrowserProviderIterator implements BookmarkImporter.BookmarkIterator {
+    private static final String SELECT_IS_BOOKMARK = BookmarkColumns.BOOKMARK + "=1";
+
+    private final Cursor mCursor;
+    private long mNextId = BookmarkImporter.ROOT_FOLDER_ID + 1;
+
+    static boolean isProviderAvailable(ContentResolver contentResolver) {
+        ContentProviderClient providerClient = contentResolver.acquireContentProviderClient(
+                Browser.BOOKMARKS_URI);
+        if (providerClient != null) {
+            providerClient.release();
+            return true;
+        }
+        return false;
+    }
+
+    static AndroidBrowserProviderIterator createIfAvailable(
+            ContentResolver contentResolver) {
+        Cursor cursor = contentResolver.query(Browser.BOOKMARKS_URI, null, SELECT_IS_BOOKMARK,
+                null, null);
+        return cursor == null ? null : new AndroidBrowserProviderIterator(cursor);
+    }
+
+    private AndroidBrowserProviderIterator(Cursor cursor) {
+        mCursor = cursor;
+    }
+
+    @Override
+    public void remove() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void close() {
+        if (mCursor == null) throw new IllegalStateException();
+        mCursor.close();
+    }
+
+    @Override
+    public boolean hasNext() {
+        if (mCursor == null) throw new IllegalStateException();
+        return mCursor.getCount() > 0 && !mCursor.isLast() && !mCursor.isAfterLast();
+    }
+
+    @Override
+    public BookmarkImporter.Bookmark next() {
+        if (mCursor == null) throw new IllegalStateException();
+        if (!mCursor.moveToNext()) throw new NoSuchElementException();
+
+        BookmarkImporter.Bookmark bookmark = new BookmarkImporter.Bookmark();
+        try {
+            bookmark.url = mCursor.getString(mCursor.getColumnIndexOrThrow(BookmarkColumns.URL));
+            bookmark.title =
+                    mCursor.getString(mCursor.getColumnIndexOrThrow(BookmarkColumns.TITLE));
+        } catch (IllegalArgumentException e) {
+            return null;
+        }
+
+        if (bookmark.url == null || bookmark.title == null) {
+            return null;
+        }
+
+        int index = mCursor.getColumnIndex(BookmarkColumns.CREATED);
+        if (index != -1 && !mCursor.isNull(index)) bookmark.created = mCursor.getLong(index);
+
+        index = mCursor.getColumnIndex(BookmarkColumns.DATE);
+        if (index != -1 && !mCursor.isNull(index)) bookmark.lastVisit = mCursor.getLong(index);
+
+        index = mCursor.getColumnIndex(BookmarkColumns.VISITS);
+        if (index != -1 && !mCursor.isNull(index)) bookmark.visits = mCursor.getLong(index);
+
+        index = mCursor.getColumnIndex(BookmarkColumns.FAVICON);
+        if (index != -1 && !mCursor.isNull(index)) bookmark.favicon = mCursor.getBlob(index);
+
+        // Add hierarchy information (flat).
+        bookmark.id = mNextId++;
+        bookmark.parentId = BookmarkImporter.ROOT_FOLDER_ID;
+        bookmark.isFolder = false;
+
+        return bookmark;
+    }
+}