github.com/hasnat/dolt/go@v0.0.0-20210628190320-9eb5d843fbb7/store/types/timestamp.go (about)

     1  // Copyright 2019 Dolthub, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package types
    16  
    17  import (
    18  	"context"
    19  	"time"
    20  
    21  	"github.com/dolthub/dolt/go/store/hash"
    22  )
    23  
    24  const (
    25  	timestampNumBytes = 15
    26  	timestampFormat   = "2006-01-02 15:04:05.999999"
    27  )
    28  
    29  type Timestamp time.Time
    30  
    31  func (v Timestamp) Value(ctx context.Context) (Value, error) {
    32  	return v, nil
    33  }
    34  
    35  func (v Timestamp) Equals(other Value) bool {
    36  	v2, ok := other.(Timestamp)
    37  	if !ok {
    38  		return false
    39  	}
    40  
    41  	return time.Time(v).Equal(time.Time(v2))
    42  }
    43  
    44  func (v Timestamp) Less(nbf *NomsBinFormat, other LesserValuable) (bool, error) {
    45  	if v2, ok := other.(Timestamp); ok {
    46  		return time.Time(v).Before(time.Time(v2)), nil
    47  	}
    48  	return TimestampKind < other.Kind(), nil
    49  }
    50  
    51  func (v Timestamp) Hash(nbf *NomsBinFormat) (hash.Hash, error) {
    52  	return getHash(v, nbf)
    53  }
    54  
    55  func (v Timestamp) isPrimitive() bool {
    56  	return true
    57  }
    58  
    59  func (v Timestamp) WalkValues(ctx context.Context, cb ValueCallback) error {
    60  	return nil
    61  }
    62  
    63  func (v Timestamp) WalkRefs(nbf *NomsBinFormat, cb RefCallback) error {
    64  	return nil
    65  }
    66  
    67  func (v Timestamp) typeOf() (*Type, error) {
    68  	return PrimitiveTypeMap[TimestampKind], nil
    69  }
    70  
    71  func (v Timestamp) Kind() NomsKind {
    72  	return TimestampKind
    73  }
    74  
    75  func (v Timestamp) valueReadWriter() ValueReadWriter {
    76  	return nil
    77  }
    78  
    79  func (v Timestamp) writeTo(w nomsWriter, nbf *NomsBinFormat) error {
    80  	data, err := time.Time(v).MarshalBinary()
    81  	if err != nil {
    82  		return err
    83  	}
    84  
    85  	err = TimestampKind.writeTo(w, nbf)
    86  	if err != nil {
    87  		return err
    88  	}
    89  
    90  	w.writeRaw(data)
    91  	return nil
    92  }
    93  
    94  func (v Timestamp) readFrom(nbf *NomsBinFormat, b *binaryNomsReader) (Value, error) {
    95  	t, err := b.ReadTimestamp()
    96  	if err != nil {
    97  		return nil, err
    98  	}
    99  	return Timestamp(t), nil
   100  
   101  }
   102  
   103  func (v Timestamp) skip(nbf *NomsBinFormat, b *binaryNomsReader) {
   104  	b.skipBytes(timestampNumBytes)
   105  }
   106  
   107  func (v Timestamp) String() string {
   108  	return time.Time(v).UTC().Format(timestampFormat)
   109  }
   110  
   111  func (v Timestamp) HumanReadableString() string {
   112  	return v.String()
   113  }