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      1 /*
      2  * Copyright (C) 2013 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 
     17 package com.android.calendar.event;
     18 
     19 import java.io.Serializable;
     20 import java.util.ArrayList;
     21 import java.util.Arrays;
     22 import java.util.Comparator;
     23 import java.util.HashMap;
     24 import java.util.Map;
     25 
     26 /**
     27  * A cache for event colors and event color keys stored based upon calendar account name and type.
     28  */
     29 public class EventColorCache implements Serializable {
     30 
     31     private static final long serialVersionUID = 2L;
     32 
     33     private static final String SEPARATOR = "::";
     34 
     35     private Map<String, ArrayList<Integer>> mColorPaletteMap;
     36     private Map<String, Integer> mColorKeyMap;
     37 
     38     public EventColorCache() {
     39         mColorPaletteMap = new HashMap<String, ArrayList<Integer>>();
     40         mColorKeyMap = new HashMap<String, Integer>();
     41     }
     42 
     43     /**
     44      * Inserts a color into the cache.
     45      */
     46     public void insertColor(String accountName, String accountType, int displayColor,
     47             int colorKey) {
     48         mColorKeyMap.put(createKey(accountName, accountType, displayColor), colorKey);
     49         String key = createKey(accountName, accountType);
     50         ArrayList<Integer> colorPalette;
     51         if ((colorPalette = mColorPaletteMap.get(key)) == null) {
     52             colorPalette = new ArrayList<Integer>();
     53         }
     54         colorPalette.add(displayColor);
     55         mColorPaletteMap.put(key, colorPalette);
     56     }
     57 
     58     /**
     59      * Retrieve an array of colors for a specific account name and type.
     60      */
     61     public int[] getColorArray(String accountName, String accountType) {
     62         ArrayList<Integer> colors = mColorPaletteMap.get(createKey(accountName, accountType));
     63         if (colors == null) {
     64             return null;
     65         }
     66         int[] ret = new int[colors.size()];
     67         for (int i = 0; i < ret.length; i++) {
     68             ret[i] = colors.get(i);
     69         }
     70         return ret;
     71     }
     72 
     73     /**
     74      * Retrieve an event color's unique key based on account name, type, and color.
     75      */
     76     public int getColorKey(String accountName, String accountType, int displayColor) {
     77         return mColorKeyMap.get(createKey(accountName, accountType, displayColor));
     78     }
     79 
     80     /**
     81      * Sorts the arrays of colors based on a comparator.
     82      */
     83     public void sortPalettes(Comparator<Integer> comparator) {
     84         for (String key : mColorPaletteMap.keySet()) {
     85             ArrayList<Integer> palette = mColorPaletteMap.get(key);
     86             Integer[] sortedColors = new Integer[palette.size()];
     87             Arrays.sort(palette.toArray(sortedColors), comparator);
     88             palette.clear();
     89             for (Integer color : sortedColors) {
     90                 palette.add(color);
     91             }
     92             mColorPaletteMap.put(key, palette);
     93         }
     94     }
     95 
     96     private String createKey(String accountName, String accountType) {
     97         return new StringBuilder().append(accountName)
     98                 .append(SEPARATOR)
     99                 .append(accountType)
    100                 .toString();
    101     }
    102 
    103     private String createKey(String accountName, String accountType, int displayColor) {
    104         return new StringBuilder(createKey(accountName, accountType))
    105             .append(SEPARATOR)
    106             .append(displayColor)
    107             .toString();
    108     }
    109 }
    110