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codec.go
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// Copyright 2014-2015 Jakub Matys
//
// 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 main
import (
"io"
"os"
)
type Encoder interface {
Encode(v interface{}) error
}
type Decoder interface {
Decode(v interface{}) error
}
type ConversionFunc func(r io.Reader, w io.Writer, options Options) error
func ConvertFormats(inFilename, outFilename string, conversionFunc ConversionFunc, options Options) error {
var inFile *os.File
var err error
if inFilename == "-" {
inFile = os.Stdin
} else {
inFile, err = os.Open(inFilename)
}
if err != nil {
return err
}
defer inFile.Close()
outFile := os.Stdout
if outFilename != "" {
if outFile, err = os.Create(outFilename); err != nil {
return err
}
defer outFile.Close()
}
if err = conversionFunc(inFile, outFile, options); err != nil {
return err
}
return nil
}
func ConvertJSON2Msgpack(reader io.Reader, writer io.Writer, options Options) (err error) {
var object interface{}
decoder := NewJSONDecoder(reader, options.convertToInt64)
encoder := NewMsgpackEncoder(writer)
for {
if err = decoder.Decode(&object); err != nil {
if err == io.EOF {
break
} else {
return err
}
}
if err = encoder.Encode(object); err != nil {
return err
}
}
return nil
}
func ConvertMsgpack2JSON(reader io.Reader, writer io.Writer, options Options) (err error) {
var object interface{}
decoder := NewMsgpackDecoder(reader)
encoder := NewJSONEncoder(writer, options.indent)
for {
if err = decoder.Decode(&object); err != nil {
if err == io.EOF {
break
} else {
return err
}
}
if err = encoder.Encode(object); err != nil {
return err
}
}
return nil
}