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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.gallery3d.ingest.data;
     18 
     19 import android.annotation.TargetApi;
     20 import android.os.Build;
     21 
     22 import java.text.DateFormat;
     23 import java.util.Calendar;
     24 
     25 /**
     26  * Represents a date (year, month, day)
     27  */
     28 @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR1)
     29 public class SimpleDate implements Comparable<SimpleDate> {
     30   public int month; // MM
     31   public int day; // DD
     32   public int year; // YYYY
     33   private long timestamp;
     34   private String mCachedStringRepresentation;
     35 
     36   public SimpleDate() {
     37   }
     38 
     39   public SimpleDate(long timestamp) {
     40     setTimestamp(timestamp);
     41   }
     42 
     43   private static Calendar sCalendarInstance = Calendar.getInstance();
     44 
     45   public void setTimestamp(long timestamp) {
     46     synchronized (sCalendarInstance) {
     47       // TODO(georgescu): find a more efficient way to convert a timestamp to a date?
     48       sCalendarInstance.setTimeInMillis(timestamp);
     49       this.day = sCalendarInstance.get(Calendar.DATE);
     50       this.month = sCalendarInstance.get(Calendar.MONTH);
     51       this.year = sCalendarInstance.get(Calendar.YEAR);
     52       this.timestamp = timestamp;
     53       mCachedStringRepresentation =
     54           DateFormat.getDateInstance(DateFormat.SHORT).format(timestamp);
     55     }
     56   }
     57 
     58   @Override
     59   public int hashCode() {
     60     final int prime = 31;
     61     int result = 1;
     62     result = prime * result + day;
     63     result = prime * result + month;
     64     result = prime * result + year;
     65     return result;
     66   }
     67 
     68   @Override
     69   public boolean equals(Object obj) {
     70     if (this == obj) {
     71       return true;
     72     }
     73     if (obj == null) {
     74       return false;
     75     }
     76     if (!(obj instanceof SimpleDate)) {
     77       return false;
     78     }
     79     SimpleDate other = (SimpleDate) obj;
     80     if (year != other.year) {
     81       return false;
     82     }
     83     if (month != other.month) {
     84       return false;
     85     }
     86     if (day != other.day) {
     87       return false;
     88     }
     89     return true;
     90   }
     91 
     92   @Override
     93   public int compareTo(SimpleDate other) {
     94     int yearDiff = this.year - other.getYear();
     95     if (yearDiff != 0) {
     96       return yearDiff;
     97     } else {
     98       int monthDiff = this.month - other.getMonth();
     99       if (monthDiff != 0) {
    100         return monthDiff;
    101       } else {
    102         return this.day - other.getDay();
    103       }
    104     }
    105   }
    106 
    107   public int getDay() {
    108     return day;
    109   }
    110 
    111   public int getMonth() {
    112     return month;
    113   }
    114 
    115   public int getYear() {
    116     return year;
    117   }
    118 
    119   @Override
    120   public String toString() {
    121     if (mCachedStringRepresentation == null) {
    122       mCachedStringRepresentation =
    123           DateFormat.getDateInstance(DateFormat.SHORT).format(timestamp);
    124     }
    125     return mCachedStringRepresentation;
    126   }
    127 }
    128