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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/*
* 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.afp;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.RandomAccessFile;
import java.util.Iterator;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.fop.afp.modca.ResourceGroup;
import org.apache.fop.afp.modca.StreamedResourceGroup;
/**
* Manages the streaming of the AFP output
*/
public class AFPStreamer implements Streamable {
/** Static logging instance */
private static final Log LOG = LogFactory.getLog(AFPStreamer.class);
private static final String AFPDATASTREAM_TEMP_FILE_PREFIX = "AFPDataStream_";
private static final int BUFFER_SIZE = 4096; // 4k writing buffer
private static final String DEFAULT_EXTERNAL_RESOURCE_FILENAME = "resources.afp";
private final Factory factory;
/** A mapping of external resource destinations to resource groups */
private final Map/*<String,AFPExternalResourceGroup>*/pathResourceGroupMap
= new java.util.HashMap/*<String,AFPExternalResourceGroup>*/();
private StreamedResourceGroup printFileResourceGroup;
/** Sets the default resource group file path */
private String defaultResourceGroupFilePath = DEFAULT_EXTERNAL_RESOURCE_FILENAME;
private File tempFile;
/** temporary document outputstream */
private OutputStream documentOutputStream;
/** the final outputstream */
private OutputStream outputStream;
private RandomAccessFile documentFile;
private DataStream dataStream;
/**
* Main constructor
*
* @param factory a factory
*/
public AFPStreamer(Factory factory) {
this.factory = factory;
}
/**
* Creates a new DataStream
*
* @param paintingState the AFP painting state
* @return a new {@link DataStream}
* @throws IOException thrown if an I/O exception of some sort has occurred
*/
public DataStream createDataStream(AFPPaintingState paintingState) throws IOException {
this.tempFile = File.createTempFile(AFPDATASTREAM_TEMP_FILE_PREFIX, null);
this.documentFile = new RandomAccessFile(tempFile, "rw");
this.documentOutputStream = new BufferedOutputStream(
new FileOutputStream(documentFile.getFD()));
this.dataStream = factory.createDataStream(paintingState, documentOutputStream);
return dataStream;
}
/**
* Sets the default resource group file path
*
* @param filePath the default resource group file path
*/
public void setDefaultResourceGroupFilePath(String filePath) {
this.defaultResourceGroupFilePath = filePath;
}
/**
* Returns the resource group for a given resource info
*
* @param level a resource level
* @return a resource group for the given resource info
*/
public ResourceGroup getResourceGroup(AFPResourceLevel level) {
ResourceGroup resourceGroup = null;
if (level.isInline()) { // no resource group for inline level
return null;
}
if (level.isExternal()) {
String filePath = level.getExternalFilePath();
if (filePath == null) {
LOG.warn("No file path provided for external resource, using default.");
filePath = defaultResourceGroupFilePath;
}
resourceGroup = (ResourceGroup)pathResourceGroupMap.get(filePath);
if (resourceGroup == null) {
OutputStream os = null;
try {
os = new BufferedOutputStream(new FileOutputStream(filePath));
} catch (FileNotFoundException fnfe) {
LOG.error("Failed to create/open external resource group file '"
+ filePath + "'");
} finally {
if (os != null) {
resourceGroup = factory.createStreamedResourceGroup(os);
pathResourceGroupMap.put(filePath, resourceGroup);
}
}
}
} else if (level.isPrintFile()) {
if (printFileResourceGroup == null) {
// use final outputstream for print-file resource group
printFileResourceGroup = factory.createStreamedResourceGroup(outputStream);
}
resourceGroup = printFileResourceGroup;
} else {
// resource group in afp document datastream
resourceGroup = dataStream.getResourceGroup(level);
}
return resourceGroup;
}
/**
* Closes off the AFP stream writing the document stream
*
* @throws IOException if an an I/O exception of some sort has occurred
*/
// write out any external resource groups
public void close() throws IOException {
Iterator it = pathResourceGroupMap.entrySet().iterator();
while (it.hasNext()) {
StreamedResourceGroup resourceGroup = (StreamedResourceGroup)it.next();
resourceGroup.close();
}
// close any open print-file resource group
if (printFileResourceGroup != null) {
printFileResourceGroup.close();
}
// write out document
writeToStream(outputStream);
outputStream.close();
// delete temporary file
tempFile.delete();
}
/**
* Sets the final outputstream
*
* @param outputStream an outputstream
*/
public void setOutputStream(OutputStream outputStream) {
this.outputStream = outputStream;
}
/** {@inheritDoc} */
public void writeToStream(OutputStream os) throws IOException {
// long start = System.currentTimeMillis();
int len = (int)documentFile.length();
int numChunks = len / BUFFER_SIZE;
int remainingChunkSize = len % BUFFER_SIZE;
byte[] buffer;
documentFile.seek(0);
if (numChunks > 0) {
buffer = new byte[BUFFER_SIZE];
for (int i = 0; i < numChunks; i++) {
documentFile.read(buffer, 0, BUFFER_SIZE);
os.write(buffer, 0, BUFFER_SIZE);
}
} else {
buffer = new byte[remainingChunkSize];
}
if (remainingChunkSize > 0) {
documentFile.read(buffer, 0, remainingChunkSize);
os.write(buffer, 0, remainingChunkSize);
}
os.flush();
// long end = System.currentTimeMillis();
// log.debug("writing time " + (end - start) + "ms");
}
}
|
