/
aggregate_count.go
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/
aggregate_count.go
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/*
* Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License")
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package aggregate
import (
"github.com/hazelcast/hazelcast-go-client/internal"
"github.com/hazelcast/hazelcast-go-client/serialization"
)
// Count returns the number of values which includes the given attribute.
// Note that this function may not work as expected for Hazelcast versions prior to 5.0.
func Count(attr string) *aggCount {
return &aggCount{attrPath: attr}
}
// CountAll returns the number of all values.
func CountAll() *aggCount {
return &aggCount{attrPath: ""}
}
type aggCount struct {
attrPath string
}
func (a aggCount) FactoryID() int32 {
return internal.AggregateFactoryID
}
func (a aggCount) ClassID() (classID int32) {
return 4
}
func (a aggCount) WriteData(output serialization.DataOutput) {
writeAttrPath(output, a.attrPath)
// member side field, not used in client
output.WriteInt64(0)
}
func (a *aggCount) ReadData(input serialization.DataInput) {
a.attrPath = input.ReadString()
// member side field, not used in client
input.ReadInt64()
}
func (a aggCount) String() string {
return makeString("Count", a.attrPath)
}