github.com/timstclair/heapster@v0.20.0-alpha1/Godeps/_workspace/src/k8s.io/kubernetes/pkg/api/unversioned/time.go (about)

     1  /*
     2  Copyright 2014 The Kubernetes Authors All rights reserved.
     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 unversioned
    18  
    19  import (
    20  	"encoding/json"
    21  	"time"
    22  
    23  	"github.com/google/gofuzz"
    24  )
    25  
    26  // Time is a wrapper around time.Time which supports correct
    27  // marshaling to YAML and JSON.  Wrappers are provided for many
    28  // of the factory methods that the time package offers.
    29  type Time struct {
    30  	time.Time
    31  }
    32  
    33  // NewTime returns a wrapped instance of the provided time
    34  func NewTime(time time.Time) Time {
    35  	return Time{time}
    36  }
    37  
    38  // Date returns the Time corresponding to the supplied parameters
    39  // by wrapping time.Date.
    40  func Date(year int, month time.Month, day, hour, min, sec, nsec int, loc *time.Location) Time {
    41  	return Time{time.Date(year, month, day, hour, min, sec, nsec, loc)}
    42  }
    43  
    44  // Now returns the current local time.
    45  func Now() Time {
    46  	return Time{time.Now()}
    47  }
    48  
    49  // IsZero returns true if the value is nil or time is zero.
    50  func (t *Time) IsZero() bool {
    51  	if t == nil {
    52  		return true
    53  	}
    54  	return t.Time.IsZero()
    55  }
    56  
    57  // Before reports whether the time instant t is before u.
    58  func (t Time) Before(u Time) bool {
    59  	return t.Time.Before(u.Time)
    60  }
    61  
    62  // Equal reports whether the time instant t is equal to u.
    63  func (t Time) Equal(u Time) bool {
    64  	return t.Time.Equal(u.Time)
    65  }
    66  
    67  // Unix returns the local time corresponding to the given Unix time
    68  // by wrapping time.Unix.
    69  func Unix(sec int64, nsec int64) Time {
    70  	return Time{time.Unix(sec, nsec)}
    71  }
    72  
    73  // Rfc3339Copy returns a copy of the Time at second-level precision.
    74  func (t Time) Rfc3339Copy() Time {
    75  	copied, _ := time.Parse(time.RFC3339, t.Format(time.RFC3339))
    76  	return Time{copied}
    77  }
    78  
    79  // UnmarshalJSON implements the json.Unmarshaller interface.
    80  func (t *Time) UnmarshalJSON(b []byte) error {
    81  	if len(b) == 4 && string(b) == "null" {
    82  		t.Time = time.Time{}
    83  		return nil
    84  	}
    85  
    86  	var str string
    87  	json.Unmarshal(b, &str)
    88  
    89  	pt, err := time.Parse(time.RFC3339, str)
    90  	if err != nil {
    91  		return err
    92  	}
    93  
    94  	t.Time = pt.Local()
    95  	return nil
    96  }
    97  
    98  // MarshalJSON implements the json.Marshaler interface.
    99  func (t Time) MarshalJSON() ([]byte, error) {
   100  	if t.IsZero() {
   101  		// Encode unset/nil objects as JSON's "null".
   102  		return []byte("null"), nil
   103  	}
   104  
   105  	return json.Marshal(t.UTC().Format(time.RFC3339))
   106  }
   107  
   108  // Fuzz satisfies fuzz.Interface.
   109  func (t *Time) Fuzz(c fuzz.Continue) {
   110  	if t == nil {
   111  		return
   112  	}
   113  	// Allow for about 1000 years of randomness.  Leave off nanoseconds
   114  	// because JSON doesn't represent them so they can't round-trip
   115  	// properly.
   116  	t.Time = time.Unix(c.Rand.Int63n(1000*365*24*60*60), 0)
   117  }
   118  
   119  var _ fuzz.Interface = &Time{}