1/*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 *   http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19
20package thrift
21
22import (
23	"bytes"
24)
25
26// Memory buffer-based implementation of the TTransport interface.
27type TMemoryBuffer struct {
28	*bytes.Buffer
29	size int
30}
31
32type TMemoryBufferTransportFactory struct {
33	size int
34}
35
36func (p *TMemoryBufferTransportFactory) GetTransport(trans TTransport) TTransport {
37	if trans != nil {
38		t, ok := trans.(*TMemoryBuffer)
39		if ok && t.size > 0 {
40			return NewTMemoryBufferLen(t.size)
41		}
42	}
43	return NewTMemoryBufferLen(p.size)
44}
45
46func NewTMemoryBufferTransportFactory(size int) *TMemoryBufferTransportFactory {
47	return &TMemoryBufferTransportFactory{size: size}
48}
49
50func NewTMemoryBuffer() *TMemoryBuffer {
51	return &TMemoryBuffer{Buffer: &bytes.Buffer{}, size: 0}
52}
53
54func NewTMemoryBufferLen(size int) *TMemoryBuffer {
55	buf := make([]byte, 0, size)
56	return &TMemoryBuffer{Buffer: bytes.NewBuffer(buf), size: size}
57}
58
59func (p *TMemoryBuffer) IsOpen() bool {
60	return true
61}
62
63func (p *TMemoryBuffer) Open() error {
64	return nil
65}
66
67func (p *TMemoryBuffer) Close() error {
68	p.Buffer.Reset()
69	return nil
70}
71
72// Flushing a memory buffer is a no-op
73func (p *TMemoryBuffer) Flush() error {
74	return nil
75}
76
77func (p *TMemoryBuffer) RemainingBytes() (num_bytes uint64) {
78	return uint64(p.Buffer.Len())
79}
80