blob: 8ad88e3b7dcdc102820bff01aeb0a69e64b8beac (
plain)
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
|
/*
* 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.
*/
/* $Id$ */
package org.apache.fop.pdf;
import java.io.ByteArrayOutputStream;
import java.io.OutputStream;
import java.io.IOException;
/**
* StreamCache implementation that uses temporary files rather than heap.
*/
public class InMemoryStreamCache implements StreamCache {
private int hintSize = -1;
/**
* The current output stream.
*/
private ByteArrayOutputStream output;
/**
* Creates a new InMemoryStreamCache.
*/
public InMemoryStreamCache() {
}
/**
* Creates a new InMemoryStreamCache.
* @param hintSize a hint about the approximate expected size of the buffer
*/
public InMemoryStreamCache(int hintSize) {
this.hintSize = hintSize;
}
/**
* Get the current OutputStream. Do not store it - it may change
* from call to call.
* @throws IOException if there is an error getting the output stream
* @return the output stream containing the data
*/
public OutputStream getOutputStream() throws IOException {
if (output == null) {
if (this.hintSize <= 0) {
output = new ByteArrayOutputStream(512);
} else {
output = new ByteArrayOutputStream(this.hintSize);
}
}
return output;
}
/**
* @see org.apache.fop.pdf.StreamCache#write(byte[])
*/
public void write(byte[] data) throws IOException {
getOutputStream().write(data);
}
/**
* Outputs the cached bytes to the given stream.
* @param out the output stream to write to
* @return the number of bytes written
* @throws IOException if there is an IO error writing to the output stream
*/
public int outputContents(OutputStream out) throws IOException {
if (output == null) {
return 0;
}
output.writeTo(out);
return output.size();
}
/**
* Returns the current size of the stream.
* @throws IOException if there is an error getting the size
* @return the length of the stream
*/
public int getSize() throws IOException {
if (output == null) {
return 0;
} else {
return output.size();
}
}
/**
* Clears and resets the cache.
* @throws IOException if there is an error closing the stream
*/
public void clear() throws IOException {
if (output != null) {
output.close();
output = null;
}
}
}
|
