Examples with Query com.google.cloud.firestore.Query used on opensource projects

Example 31 with Query

use of com.google.cloud.firestore.Query in project getting-started-java by GoogleCloudPlatform.

the class FirestoreDao method listBooks.

// [END bookshelf_firestore_documents_to_books]
// [START bookshelf_firestore_list_books]
@Override
public Result<Book> listBooks(String startTitle) {
    Query booksQuery = booksCollection.orderBy("title").limit(10);
    if (startTitle != null) {
        booksQuery = booksQuery.startAfter(startTitle);
    }
    try {
        QuerySnapshot snapshot = booksQuery.get().get();
        List<Book> results = documentsToBooks(snapshot.getDocuments());
        String newCursor = null;
        if (results.size() > 0) {
            newCursor = results.get(results.size() - 1).getTitle();
        }
        return new Result<>(results, newCursor);
    } catch (InterruptedException | ExecutionException e) {
        e.printStackTrace();
    }
    return new Result<>(Lists.newArrayList(), null);
}