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jsonx.go
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jsonx.go
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// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You 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 jsonx contains utilities for working with JSON encoded data.
//
// TODO(https://github.com/apache/beam/issues/20271): Delete this package once the SDK defaults to schemas.
package jsonx
import (
"bytes"
"encoding/json"
"io"
)
// Marshal encodes a given value as JSON, and returns the bytes.
func Marshal(elem interface{}) ([]byte, error) {
var bb bytes.Buffer
if err := MarshalTo(elem, &bb); err != nil {
return nil, err
}
return bytes.TrimRight(bb.Bytes(), "\n"), nil
}
// MarshalTo encodes a given value as JSON, and returns the bytes.
func MarshalTo(elem interface{}, w io.Writer) error {
enc := json.NewEncoder(w)
return enc.Encode(elem)
}
// Unmarshal decodes a given value as JSON, and returns the bytes.
// The passed in element must be a pointer of the given type.
func Unmarshal(elem interface{}, data []byte) error {
return UnmarshalFrom(elem, bytes.NewReader(data))
}
// UnmarshalFrom decodes a given value as JSON, and returns the bytes.
// The passed in element must be a pointer of the given type.
func UnmarshalFrom(elem interface{}, r io.Reader) error {
dec := json.NewDecoder(r)
return dec.Decode(elem)
}