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field.go
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field.go
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// Copyright (c) 2019 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package query
import (
"bytes"
"fmt"
"github.com/m3db/m3/src/m3ninx/generated/proto/querypb"
"github.com/m3db/m3/src/m3ninx/search"
"github.com/m3db/m3/src/m3ninx/search/searcher"
)
// FieldQuery finds document which have the given field exactly.
type FieldQuery struct {
field []byte
}
// NewFieldQuery constructs a new FieldQuery for the given field.
func NewFieldQuery(field []byte) search.Query {
return &FieldQuery{
field: field,
}
}
// Field returns the field []byte.
func (q *FieldQuery) Field() []byte {
return q.field
}
// Searcher returns a searcher over the provided readers.
func (q *FieldQuery) Searcher() (search.Searcher, error) {
return searcher.NewFieldSearcher(q.field)
}
// Equal reports whether q is equivalent to o.
func (q *FieldQuery) Equal(o search.Query) bool {
o, ok := singular(o)
if !ok {
return false
}
inner, ok := o.(*FieldQuery)
if !ok {
return false
}
return bytes.Equal(q.field, inner.field)
}
// ToProto returns the Protobuf query struct corresponding to the term query.
func (q *FieldQuery) ToProto() *querypb.Query {
term := querypb.FieldQuery{
Field: q.field,
}
return &querypb.Query{
Query: &querypb.Query_Field{Field: &term},
}
}
func (q *FieldQuery) String() string {
return fmt.Sprintf("field(%s)", q.field)
}