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projections_impl.go
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/
projections_impl.go
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// Copyright (c) 2008-2020, 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 projection
import (
"github.com/hazelcast/hazelcast-go-client/internal/util/precond"
"github.com/hazelcast/hazelcast-go-client/serialization"
)
const singleAttributeProjectionID = 0
type SingleAttribute struct {
attributePath string
}
func NewSingleAttribute(attributePath string) (*SingleAttribute, error) {
err := precond.CheckHasText(attributePath, "attributePath must not be empty")
if err != nil {
return nil, err
}
return &SingleAttribute{attributePath}, nil
}
func (*SingleAttribute) FactoryID() (factoryID int32) {
return FactoryID
}
func (*SingleAttribute) ClassID() (classID int32) {
return singleAttributeProjectionID
}
func (sa *SingleAttribute) WriteData(output serialization.DataOutput) (err error) {
output.WriteUTF(sa.attributePath)
return
}
func (sa *SingleAttribute) ReadData(input serialization.DataInput) error {
sa.attributePath = input.ReadUTF()
return input.Error()
}