Class: TZInfo::TimeOrDateTime

Inherits:
Object
  • Object
show all
Includes:
Comparable
Defined in:
lib/tzinfo/time_or_datetime.rb

Overview

Used by TZInfo internally to represent either a Time, DateTime or an Integer timestamp (seconds since 1970-01-01 00:00:00).

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(timeOrDateTime) ⇒ TimeOrDateTime

Constructs a new TimeOrDateTime. timeOrDateTime can be a Time, DateTime or Integer. If using a Time or DateTime, any time zone information is ignored.

Integer timestamps must be within the range supported by Time on the platform being used.



17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
 
# File 'lib/tzinfo/time_or_datetime.rb', line 17

def initialize(timeOrDateTime)
  @time = nil
  @datetime = nil
  @timestamp = nil
  
  if timeOrDateTime.is_a?(Time)
    @time = timeOrDateTime
    
    # Avoid using the slower Rational class unless necessary.
    nsec = RubyCoreSupport.time_nsec(@time)
    usec = nsec % 1000 == 0 ? nsec / 1000 : Rational(nsec, 1000)
    
    @time = Time.utc(@time.year, @time.mon, @time.mday, @time.hour, @time.min, @time.sec, usec) unless @time.utc?        
    @orig = @time
  elsif timeOrDateTime.is_a?(DateTime)
    @datetime = timeOrDateTime
    @datetime = @datetime.new_offset(0) unless @datetime.offset == 0
    @orig = @datetime
  else
    @timestamp = timeOrDateTime.to_i
    
    if !RubyCoreSupport.time_supports_64bit && (@timestamp > 2147483647 || @timestamp < -2147483648 || (@timestamp < 0 && !RubyCoreSupport.time_supports_negative))
      raise RangeError, 'Timestamp is outside the supported range of Time on this platform'
    end
    
    @orig = @timestamp
  end
end

Class Method Details

.wrap(timeOrDateTime) ⇒ Object

If no block is given, returns a TimeOrDateTime wrapping the given timeOrDateTime. If a block is specified, a TimeOrDateTime is constructed and passed to the block. The result of the block must be a TimeOrDateTime.

The result of the block will be converted to the type of the originally passed in timeOrDateTime and then returned as the result of wrap.

timeOrDateTime can be a Time, DateTime, timestamp (Integer) or TimeOrDateTime. If a TimeOrDateTime is passed in, no new TimeOrDateTime will be constructed and the value passed to wrap will be used when calling the block.



313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
 
# File 'lib/tzinfo/time_or_datetime.rb', line 313

def self.wrap(timeOrDateTime)      
  t = timeOrDateTime.is_a?(TimeOrDateTime) ? timeOrDateTime : TimeOrDateTime.new(timeOrDateTime)        
  
  if block_given?
    t = yield t
    
    if timeOrDateTime.is_a?(TimeOrDateTime)
      t
    elsif timeOrDateTime.is_a?(Time)
      t.to_time
    elsif timeOrDateTime.is_a?(DateTime)
      t.to_datetime
    else
      t.to_i
    end        
  else
    t
  end
end

Instance Method Details

#+(seconds) ⇒ Object

Adds a number of seconds to the TimeOrDateTime. Returns a new TimeOrDateTime, preserving what the original constructed type was. If the original type is a Time and the resulting calculation goes out of range for Times, then an exception will be raised by the Time class.



245
246
247
248
249
250
251
252
253
254
255
256
 
# File 'lib/tzinfo/time_or_datetime.rb', line 245

def +(seconds)
  if seconds == 0
    self
  else
    if @orig.is_a?(DateTime)
      TimeOrDateTime.new(@orig + OffsetRationals.rational_for_offset(seconds))
    else
      # + defined for Time and Integer
      TimeOrDateTime.new(@orig + seconds)
    end
  end
end

#-(seconds) ⇒ Object

Subtracts a number of seconds from the TimeOrDateTime. Returns a new TimeOrDateTime, preserving what the original constructed type was. If the original type is a Time and the resulting calculation goes out of range for Times, then an exception will be raised by the Time class.



262
263
264
 
# File 'lib/tzinfo/time_or_datetime.rb', line 262

def -(seconds)
  self + (-seconds)
end

#<=>(timeOrDateTime) ⇒ Object

Compares this TimeOrDateTime with another Time, DateTime, timestamp (Integer) or TimeOrDateTime. Returns -1, 0 or +1 depending whether the receiver is less than, equal to, or greater than timeOrDateTime.

Returns nil if the passed in timeOrDateTime is not comparable with TimeOrDateTime instances.

Comparisons involving a DateTime will be performed using DateTime#<=>. Comparisons that don’t involve a DateTime, but include a Time will be performed with Time#<=>. Otherwise comparisons will be performed with Integer#<=>.



218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
 
# File 'lib/tzinfo/time_or_datetime.rb', line 218

def <=>(timeOrDateTime)
  return nil unless timeOrDateTime.is_a?(TimeOrDateTime) || 
                    timeOrDateTime.is_a?(Time) ||
                    timeOrDateTime.is_a?(DateTime) ||
                    timeOrDateTime.respond_to?(:to_i)

  unless timeOrDateTime.is_a?(TimeOrDateTime)
    timeOrDateTime = TimeOrDateTime.wrap(timeOrDateTime)
  end
      
  orig = timeOrDateTime.to_orig
  
  if @orig.is_a?(DateTime) || orig.is_a?(DateTime)
    # If either is a DateTime, assume it is there for a reason 
    # (i.e. for its larger range of acceptable values on 32-bit systems).
    to_datetime <=> timeOrDateTime.to_datetime
  elsif @orig.is_a?(Time) || orig.is_a?(Time)
    to_time <=> timeOrDateTime.to_time
  else
    to_i <=> timeOrDateTime.to_i
  end
end

#add_with_convert(seconds) ⇒ Object

Similar to the + operator, but converts to a DateTime based TimeOrDateTime where the Time or Integer timestamp to go out of the allowed range for a Time, converts to a DateTime based TimeOrDateTime.

Note that the range of Time varies based on the platform.



271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
 
# File 'lib/tzinfo/time_or_datetime.rb', line 271

def add_with_convert(seconds)
  if seconds == 0
    self
  else
    if @orig.is_a?(DateTime)
      TimeOrDateTime.new(@orig + OffsetRationals.rational_for_offset(seconds))
    else
      # A Time or timestamp.
      result = to_i + seconds
      
      if ((result > 2147483647 || result < -2147483648) && !RubyCoreSupport.time_supports_64bit) || (result < 0 && !RubyCoreSupport.time_supports_negative)
        result = TimeOrDateTime.new(to_datetime + OffsetRationals.rational_for_offset(seconds))
      else
        result = TimeOrDateTime.new(@orig + seconds)
      end
    end
  end
end

#eql?(todt) ⇒ Boolean

Returns true if todt represents the same time and was originally constructed with the same type (DateTime, Time or timestamp) as this TimeOrDateTime.

Returns:

  • (Boolean) 


293
294
295
 
# File 'lib/tzinfo/time_or_datetime.rb', line 293

def eql?(todt)
  todt.kind_of?(TimeOrDateTime) && to_orig.eql?(todt.to_orig)      
end

#hash ⇒ Object

Returns a hash of this TimeOrDateTime.



298
299
300
 
# File 'lib/tzinfo/time_or_datetime.rb', line 298

def hash
  @orig.hash
end

#hour ⇒ Object

Returns the hour of the day (0..23).



158
159
160
161
162
163
164
165
166
 
# File 'lib/tzinfo/time_or_datetime.rb', line 158

def hour
  if @time
    @time.hour
  elsif @datetime
    @datetime.hour
  else
    to_time.hour
  end
end

#inspect ⇒ Object

Returns internal object state as a programmer-readable string.



118
119
120
 
# File 'lib/tzinfo/time_or_datetime.rb', line 118

def inspect
  "#<#{self.class}: #{@orig.inspect}>"
end

#mday ⇒ Object Also known as: day

Returns the day of the month (1..n).



146
147
148
149
150
151
152
153
154
 
# File 'lib/tzinfo/time_or_datetime.rb', line 146

def mday
  if @time
    @time.mday
  elsif @datetime
    @datetime.mday
  else
    to_time.mday
  end
end

#min ⇒ Object

Returns the minute of the hour (0..59).



169
170
171
172
173
174
175
176
177
 
# File 'lib/tzinfo/time_or_datetime.rb', line 169

def min
  if @time
    @time.min
  elsif @datetime
    @datetime.min
  else
    to_time.min
  end
end

#mon ⇒ Object Also known as: month

Returns the month of the year (1..12).



134
135
136
137
138
139
140
141
142
 
# File 'lib/tzinfo/time_or_datetime.rb', line 134

def mon
  if @time
    @time.mon
  elsif @datetime
    @datetime.mon
  else
    to_time.mon
  end
end

#sec ⇒ Object

Returns the second of the minute (0..60). (60 for a leap second).



180
181
182
183
184
185
186
187
188
 
# File 'lib/tzinfo/time_or_datetime.rb', line 180

def sec
  if @time
    @time.sec
  elsif @datetime
    @datetime.sec
  else
    to_time.sec
  end
end

#to_datetime ⇒ Object

Returns the time as a DateTime.

When converting from a Time, the result is truncated to microsecond precision.



71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
 
# File 'lib/tzinfo/time_or_datetime.rb', line 71

def to_datetime
  # Thread-safety: It is possible that the value of @datetime may be 
  # calculated multiple times in concurrently executing threads. It is not 
  # worth the overhead of locking to ensure that @datetime is only 
  # calculated once.

  unless @datetime
    # Avoid using Rational unless necessary.
    u = usec
    s = u == 0 ? sec : Rational(sec * 1000000 + u, 1000000)
    @datetime = RubyCoreSupport.datetime_new(year, mon, mday, hour, min, s)
  end
  
  @datetime
end

#to_i ⇒ Object

Returns the time as an integer timestamp.



88
89
90
91
92
93
94
95
96
97
98
99
 
# File 'lib/tzinfo/time_or_datetime.rb', line 88

def to_i
  # Thread-safety: It is possible that the value of @timestamp may be 
  # calculated multiple times in concurrently executing threads. It is not 
  # worth the overhead of locking to ensure that @timestamp is only 
  # calculated once.

  unless @timestamp
    @timestamp = to_time.to_i
  end
  
  @timestamp
end

#to_orig ⇒ Object

Returns the time as the original time passed to new.



102
103
104
 
# File 'lib/tzinfo/time_or_datetime.rb', line 102

def to_orig
  @orig
end

#to_s ⇒ Object

Returns a string representation of the TimeOrDateTime.



107
108
109
110
111
112
113
114
115
 
# File 'lib/tzinfo/time_or_datetime.rb', line 107

def to_s
  if @orig.is_a?(Time)
    "Time: #{@orig.to_s}"
  elsif @orig.is_a?(DateTime)
    "DateTime: #{@orig.to_s}"
  else
    "Timestamp: #{@orig.to_s}"
  end
end

#to_time ⇒ Object

Returns the time as a Time.

When converting from a DateTime, the result is truncated to microsecond precision.



50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
 
# File 'lib/tzinfo/time_or_datetime.rb', line 50

def to_time
  # Thread-safety: It is possible that the value of @time may be 
  # calculated multiple times in concurrently executing threads. It is not 
  # worth the overhead of locking to ensure that @time is only 
  # calculated once.

  unless @time
    if @timestamp
      @time = Time.at(@timestamp).utc
    else
      @time = Time.utc(year, mon, mday, hour, min, sec, usec)
    end
  end
  
  @time      
end

#usec ⇒ Object

Returns the number of microseconds for the time.



191
192
193
194
195
196
197
198
199
200
201
202
203
204
 
# File 'lib/tzinfo/time_or_datetime.rb', line 191

def usec      
  if @time
    @time.usec
  elsif @datetime
    # Ruby 1.8 has sec_fraction (of which the documentation says
    # 'I do NOT recommend you to use this method'). sec_fraction no longer
    # exists in Ruby 1.9.
    
    # Calculate the sec_fraction from the day_fraction.
    ((@datetime.day_fraction - OffsetRationals.rational_for_offset(@datetime.hour * 3600 + @datetime.min * 60 + @datetime.sec)) * 86400000000).to_i
  else 
    0
  end
end

#year ⇒ Object

Returns the year.



123
124
125
126
127
128
129
130
131
 
# File 'lib/tzinfo/time_or_datetime.rb', line 123

def year
  if @time
    @time.year
  elsif @datetime
    @datetime.year
  else
    to_time.year
  end
end