1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.quicksearchbox;
18
19import android.util.Log;
20
21import java.util.HashSet;
22
23/**
24 * A SuggestionCursor that is backed by a list of SuggestionPosition objects
25 * and doesn't allow duplicate suggestions.
26 */
27public class ListSuggestionCursorNoDuplicates extends ListSuggestionCursor {
28
29    private static final boolean DBG = false;
30    private static final String TAG = "QSB.ListSuggestionCursorNoDuplicates";
31
32    private final HashSet<String> mSuggestionKeys;
33
34    public ListSuggestionCursorNoDuplicates(String userQuery) {
35        super(userQuery);
36        mSuggestionKeys = new HashSet<String>();
37    }
38
39    @Override
40    public boolean add(Suggestion suggestion) {
41        String key = SuggestionUtils.getSuggestionKey(suggestion);
42        if (mSuggestionKeys.add(key)) {
43            return super.add(suggestion);
44        } else {
45            if (DBG) Log.d(TAG, "Rejecting duplicate " + key);
46            return false;
47        }
48    }
49
50}
51