1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
/*
* 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 org.apache.thrift.transport;
import org.apache.thrift.TConfiguration;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Objects;
import java.util.zip.Deflater;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.Inflater;
import java.util.zip.InflaterInputStream;
/**
* TZlibTransport deflates on write and inflates on read.
*/
public class TZlibTransport extends TIOStreamTransport {
private TTransport transport_ = null;
public static class Factory extends TTransportFactory {
public Factory() {
}
@Override
public TTransport getTransport(TTransport base) throws TTransportException {
return new TZlibTransport(base);
}
}
/**
* Constructs a new TZlibTransport instance.
* @param transport the underlying transport to read from and write to
*/
public TZlibTransport(TTransport transport) throws TTransportException {
this(transport, Deflater.BEST_COMPRESSION);
}
/**
* Constructs a new TZlibTransport instance.
* @param transport the underlying transport to read from and write to
* @param compressionLevel 0 for no compression, 9 for maximum compression
*/
public TZlibTransport(TTransport transport, int compressionLevel) throws TTransportException {
super(Objects.isNull(transport.getConfiguration()) ? new TConfiguration() : transport.getConfiguration());
transport_ = transport;
inputStream_ = new InflaterInputStream(new TTransportInputStream(transport_), new Inflater());
outputStream_ = new DeflaterOutputStream(new TTransportOutputStream(transport_), new Deflater(compressionLevel, false), true);
}
@Override
public boolean isOpen() {
return transport_.isOpen();
}
@Override
public void open() throws TTransportException {
transport_.open();
}
@Override
public void close() {
super.close();
if (transport_.isOpen()) {
transport_.close();
}
}
}
class TTransportInputStream extends InputStream {
private TTransport transport = null;
public TTransportInputStream(TTransport transport) {
this.transport = transport;
}
@Override
public int read() throws IOException {
try {
byte[] buf = new byte[1];
transport.read(buf, 0, 1);
return buf[0];
} catch (TTransportException e) {
throw new IOException(e);
}
}
@Override
public int read(byte b[], int off, int len) throws IOException {
try {
return transport.read(b, off, len);
} catch (TTransportException e) {
throw new IOException(e);
}
}
}
class TTransportOutputStream extends OutputStream {
private TTransport transport = null;
public TTransportOutputStream(TTransport transport) {
this.transport = transport;
}
@Override
public void write(final int b) throws IOException {
try {
transport.write(new byte[]{(byte) b});
} catch (TTransportException e) {
throw new IOException(e);
}
}
@Override
public void write(byte b[], int off, int len) throws IOException {
try {
transport.write(b, off, len);
} catch (TTransportException e) {
throw new IOException(e);
}
}
@Override
public void flush() throws IOException {
try {
transport.flush();
} catch (TTransportException e) {
throw new IOException(e);
}
}
}
|
