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gzip_option.go
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gzip_option.go
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//
// Copyright (C) 2019-2020 Vdaas.org Vald team ( kpango, rinx, kmrmt )
//
// 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
//
// https://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 compress provides compress functions
package compress
import (
"github.com/vdaas/vald/internal/compress/gzip"
"github.com/vdaas/vald/internal/errors"
)
// GzipOption represents the functional option for gzipCompressor.
type GzipOption func(c *gzipCompressor) error
var (
defaultGzipOpts = []GzipOption{
WithGzipGob(),
WithGzipCompressionLevel(gzip.DefaultCompression),
}
)
// WithGzipGob represents the option to set the GobOption to initialize Gob.
func WithGzipGob(opts ...GobOption) GzipOption {
return func(c *gzipCompressor) error {
gobc, err := NewGob(opts...)
if err != nil {
return err
}
c.gobc = gobc
return nil
}
}
// WithGzipCompressionLevel represents the option to set the compress level for gzip.
func WithGzipCompressionLevel(level int) GzipOption {
return func(c *gzipCompressor) error {
if level < gzip.HuffmanOnly || level > gzip.BestCompression {
return errors.ErrInvalidCompressionLevel(level)
}
c.compressionLevel = level
return nil
}
}