1 /*
2 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.jfr.consumer;
27
28 import java.io.IOException;
29 import java.util.ArrayList;
30 import java.util.List;
31 import java.util.Objects;
32
33 import jdk.jfr.EventType;
34 import jdk.jfr.ValueDescriptor;
35 import jdk.jfr.internal.MetadataDescriptor;
36 import jdk.jfr.internal.PrivateAccess;
37 import jdk.jfr.internal.Type;
38 import jdk.jfr.internal.consumer.RecordingInput;
39
40 /**
41 * Class that create parsers suitable for reading events and constant pools
42 */
43 final class ParserFactory {
44 private final LongMap<Parser> parsers = new LongMap<>();
45 private final TimeConverter timeConverter;
46 private final LongMap<Type> types = new LongMap<>();
47 private final LongMap<ConstantMap> constantPools;
48
49 public ParserFactory(MetadataDescriptor metadata, TimeConverter timeConverter) throws IOException {
50 this.constantPools = new LongMap<>();
51 this.timeConverter = timeConverter;
52 for (Type t : metadata.getTypes()) {
53 types.put(t.getId(), t);
54 }
55 for (Type t : types) {
56 if (!t.getFields().isEmpty()) { // Avoid primitives
57 CompositeParser cp = createCompositeParser(t);
58 if (t.isSimpleType()) { // Reduce to nested parser
59 parsers.put(t.getId(), cp.parsers[0]);
60 }
61
62 }
63 }
64 // Override event types with event parsers
65 for (EventType t : metadata.getEventTypes()) {
66 parsers.put(t.getId(), createEventParser(t));
67 }
68 }
69
70 public LongMap<Parser> getParsers() {
71 return parsers;
72 }
73
74 public LongMap<ConstantMap> getConstantPools() {
75 return constantPools;
76 }
77
78 public LongMap<Type> getTypeMap() {
79 return types;
80 }
81
82 private EventParser createEventParser(EventType eventType) throws IOException {
83 List<Parser> parsers = new ArrayList<Parser>();
84 for (ValueDescriptor f : eventType.getFields()) {
85 parsers.add(createParser(f));
86 }
87 return new EventParser(timeConverter, eventType, parsers.toArray(new Parser[0]));
88 }
89
90 private Parser createParser(ValueDescriptor v) throws IOException {
91 boolean constantPool = PrivateAccess.getInstance().isConstantPool(v);
92 if (v.isArray()) {
93 Type valueType = PrivateAccess.getInstance().getType(v);
94 ValueDescriptor element = PrivateAccess.getInstance().newValueDescriptor(v.getName(), valueType, v.getAnnotationElements(), 0, constantPool, null);
95 return new ArrayParser(createParser(element));
96 }
97 long id = v.getTypeId();
98 Type type = types.get(id);
99 if (type == null) {
100 throw new IOException("Type '" + v.getTypeName() + "' is not defined");
101 }
102 if (constantPool) {
103 ConstantMap pool = constantPools.get(id);
104 if (pool == null) {
105 pool = new ConstantMap(ObjectFactory.create(type, timeConverter), type.getName());
106 constantPools.put(id, pool);
107 }
108 return new ConstantMapValueParser(pool);
109 }
110 Parser parser = parsers.get(id);
111 if (parser == null) {
112 if (!v.getFields().isEmpty()) {
113 return createCompositeParser(type);
114 } else {
115 return registerParserType(type, createPrimitiveParser(type));
116 }
117 }
118 return parser;
119 }
120
121 private Parser createPrimitiveParser(Type type) throws IOException {
122 switch (type.getName()) {
123 case "int":
124 return new IntegerParser();
125 case "long":
126 return new LongParser();
127 case "float":
128 return new FloatParser();
129 case "double":
130 return new DoubleParser();
131 case "char":
132 return new CharacterParser();
133 case "boolean":
134 return new BooleanParser();
135 case "short":
136 return new ShortParser();
137 case "byte":
138 return new ByteParser();
139 case "java.lang.String":
140 ConstantMap pool = new ConstantMap(ObjectFactory.create(type, timeConverter), type.getName());
141 constantPools.put(type.getId(), pool);
142 return new StringParser(pool);
143 default:
144 throw new IOException("Unknown primitive type " + type.getName());
145 }
146 }
147
148 private Parser registerParserType(Type t, Parser parser) {
149 Parser p = parsers.get(t.getId());
150 // check if parser exists (known type)
151 if (p != null) {
152 return p;
153 }
154 parsers.put(t.getId(), parser);
155 return parser;
156 }
157
158 private CompositeParser createCompositeParser(Type type) throws IOException {
159 List<ValueDescriptor> vds = type.getFields();
160 Parser[] parsers = new Parser[vds.size()];
161 CompositeParser composite = new CompositeParser(parsers);
162 // need to pre-register so recursive types can be handled
163 registerParserType(type, composite);
164
165 int index = 0;
166 for (ValueDescriptor vd : vds) {
167 parsers[index++] = createParser(vd);
168 }
169 return composite;
170 }
171
172 private static final class BooleanParser extends Parser {
173 @Override
174 public Object parse(RecordingInput input) throws IOException {
175 return input.readBoolean() ? Boolean.TRUE : Boolean.FALSE;
176 }
177 }
178
179 private static final class ByteParser extends Parser {
180 @Override
181 public Object parse(RecordingInput input) throws IOException {
182 return Byte.valueOf(input.readByte());
183 }
184 }
185
186 private static final class LongParser extends Parser {
187 @Override
188 public Object parse(RecordingInput input) throws IOException {
189 return Long.valueOf(input.readLong());
190 }
191 }
192
193 private static final class IntegerParser extends Parser {
194 @Override
195 public Object parse(RecordingInput input) throws IOException {
196 return Integer.valueOf(input.readInt());
197 }
198 }
199
200 private static final class ShortParser extends Parser {
201 @Override
202 public Object parse(RecordingInput input) throws IOException {
203 return Short.valueOf(input.readShort());
204 }
205 }
206
207 private static final class CharacterParser extends Parser {
208 @Override
209 public Object parse(RecordingInput input) throws IOException {
210 return Character.valueOf(input.readChar());
211 }
212 }
213
214 private static final class FloatParser extends Parser {
215 @Override
216 public Object parse(RecordingInput input) throws IOException {
217 return Float.valueOf(input.readFloat());
218 }
219 }
220
221 private static final class DoubleParser extends Parser {
222 @Override
223 public Object parse(RecordingInput input) throws IOException {
224 return Double.valueOf(input.readDouble());
225 }
226 }
227
228 private static final class StringParser extends Parser {
229 private final ConstantMap stringConstantMap;
230 private String last;
231
232 StringParser(ConstantMap stringConstantMap) {
233 this.stringConstantMap = stringConstantMap;
234 }
235
236 @Override
237 public Object parse(RecordingInput input) throws IOException {
238 String s = parseEncodedString(input);
239 if (!Objects.equals(s, last)) {
240 last = s;
241 }
242 return last;
243 }
244
245 private String parseEncodedString(RecordingInput input) throws IOException {
246 byte encoding = input.readByte();
247 if (encoding == RecordingInput.STRING_ENCODING_CONSTANT_POOL) {
248 long id = input.readLong();
249 return (String) stringConstantMap.get(id);
250 } else {
251 return input.readEncodedString(encoding);
252 }
253 }
254 }
255
256 private final static class ArrayParser extends Parser {
257 private final Parser elementParser;
258
259 public ArrayParser(Parser elementParser) {
260 this.elementParser = elementParser;
261 }
262
263 @Override
264 public Object parse(RecordingInput input) throws IOException {
265 final int size = input.readInt();
266 final Object[] array = new Object[size];
267 for (int i = 0; i < size; i++) {
268 array[i] = elementParser.parse(input);
269 }
270 return array;
271 }
272 }
273
274 private final static class CompositeParser extends Parser {
275 private final Parser[] parsers;
276
277 public CompositeParser(Parser[] valueParsers) {
278 this.parsers = valueParsers;
279 }
280
281 @Override
282 public Object parse(RecordingInput input) throws IOException {
283 final Object[] values = new Object[parsers.length];
284 for (int i = 0; i < values.length; i++) {
285 values[i] = parsers[i].parse(input);
286 }
287 return values;
288 }
289 }
290
291 private static final class ConstantMapValueParser extends Parser {
292 private final ConstantMap pool;
293
294 ConstantMapValueParser(ConstantMap pool) {
295 this.pool = pool;
296 }
297
298 @Override
299 public Object parse(RecordingInput input) throws IOException {
300 return pool.get(input.readLong());
301 }
302 }
303 }