]>
Commit | Line | Data |
---|---|---|
f67539c2 TL |
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 | package org.apache.thrift.transport; | |
20 | ||
21 | /** | |
22 | * TTransport for reading from an AutoExpandingBuffer. | |
23 | */ | |
24 | public class AutoExpandingBufferReadTransport extends TTransport { | |
25 | ||
26 | private final AutoExpandingBuffer buf; | |
27 | ||
28 | private int pos = 0; | |
29 | private int limit = 0; | |
30 | ||
31 | public AutoExpandingBufferReadTransport(int initialCapacity) { | |
32 | this.buf = new AutoExpandingBuffer(initialCapacity); | |
33 | } | |
34 | ||
35 | public void fill(TTransport inTrans, int length) throws TTransportException { | |
36 | buf.resizeIfNecessary(length); | |
37 | inTrans.readAll(buf.array(), 0, length); | |
38 | pos = 0; | |
39 | limit = length; | |
40 | } | |
41 | ||
42 | @Override | |
43 | public void close() {} | |
44 | ||
45 | @Override | |
46 | public boolean isOpen() { return true; } | |
47 | ||
48 | @Override | |
49 | public void open() throws TTransportException {} | |
50 | ||
51 | @Override | |
52 | public final int read(byte[] target, int off, int len) throws TTransportException { | |
53 | int amtToRead = Math.min(len, getBytesRemainingInBuffer()); | |
54 | System.arraycopy(buf.array(), pos, target, off, amtToRead); | |
55 | consumeBuffer(amtToRead); | |
56 | return amtToRead; | |
57 | } | |
58 | ||
59 | @Override | |
60 | public void write(byte[] buf, int off, int len) throws TTransportException { | |
61 | throw new UnsupportedOperationException(); | |
62 | } | |
63 | ||
64 | @Override | |
65 | public final void consumeBuffer(int len) { | |
66 | pos += len; | |
67 | } | |
68 | ||
69 | @Override | |
70 | public final byte[] getBuffer() { | |
71 | return buf.array(); | |
72 | } | |
73 | ||
74 | @Override | |
75 | public final int getBufferPosition() { | |
76 | return pos; | |
77 | } | |
78 | ||
79 | @Override | |
80 | public final int getBytesRemainingInBuffer() { | |
81 | return limit - pos; | |
82 | } | |
83 | } | |
84 |