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