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30 lines
451 B
Go
30 lines
451 B
Go
package transform
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import (
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"io"
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"bytes"
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)
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type chain struct {
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transformers []Transformer
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}
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func NewChain(trs ...Transformer) Transformer {
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return &chain{transformers: trs}
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}
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func (c *chain) Apply(r io.Reader, w io.Writer) (err error) {
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in := r
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for _, tr := range c.transformers {
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out := new(bytes.Buffer)
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err = tr.Apply(in, out)
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if err != nil {
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return
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}
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in = bytes.NewBuffer(out.Bytes())
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}
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_, err = io.Copy(w, in)
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return
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}
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