86 lines
2.5 KiB
Go
86 lines
2.5 KiB
Go
package ffjson
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/**
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* Copyright 2015 Paul Querna, Klaus Post
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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import (
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"encoding/json"
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"errors"
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fflib "github.com/pquerna/ffjson/fflib/v1"
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"io"
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"reflect"
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)
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// This is a reusable encoder.
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// It allows to encode many objects to a single writer.
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// This should not be used by more than one goroutine at the time.
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type Encoder struct {
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buf fflib.Buffer
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w io.Writer
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enc *json.Encoder
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}
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// SetEscapeHTML specifies whether problematic HTML characters
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// should be escaped inside JSON quoted strings.
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// The default behavior is to escape &, <, and > to \u0026, \u003c, and \u003e
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// to avoid certain safety problems that can arise when embedding JSON in HTML.
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//
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// In non-HTML settings where the escaping interferes with the readability
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// of the output, SetEscapeHTML(false) disables this behavior.
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func (enc *Encoder) SetEscapeHTML(on bool) {
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enc.enc.SetEscapeHTML(on)
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}
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// NewEncoder returns a reusable Encoder.
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// Output will be written to the supplied writer.
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func NewEncoder(w io.Writer) *Encoder {
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return &Encoder{w: w, enc: json.NewEncoder(w)}
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}
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// Encode the data in the supplied value to the stream
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// given on creation.
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// When the function returns the output has been
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// written to the stream.
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func (e *Encoder) Encode(v interface{}) error {
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f, ok := v.(marshalerFaster)
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if ok {
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e.buf.Reset()
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err := f.MarshalJSONBuf(&e.buf)
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if err != nil {
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return err
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}
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_, err = io.Copy(e.w, &e.buf)
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return err
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}
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return e.enc.Encode(v)
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}
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// EncodeFast will unmarshal the data if fast marshall is available.
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// This function can be used if you want to be sure the fast
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// marshal is used or in testing.
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// If you would like to have fallback to encoding/json you can use the
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// regular Encode() method.
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func (e *Encoder) EncodeFast(v interface{}) error {
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_, ok := v.(marshalerFaster)
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if !ok {
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return errors.New("ffjson marshal not available for type " + reflect.TypeOf(v).String())
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}
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return e.Encode(v)
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}
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