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866e5b51 | 1 | /******************************************************************************* |
60ae41e1 | 2 | * Copyright (c) 2011, 2014 Ericsson, Ecole Polytechnique de Montreal and others |
866e5b51 FC |
3 | * |
4 | * All rights reserved. This program and the accompanying materials are made | |
5 | * available under the terms of the Eclipse Public License v1.0 which | |
6 | * accompanies this distribution, and is available at | |
7 | * http://www.eclipse.org/legal/epl-v10.html | |
8 | * | |
9 | * Contributors: Matthew Khouzam - Initial API and implementation | |
10 | * Contributors: Simon Marchi - Initial API and implementation | |
11 | *******************************************************************************/ | |
12 | ||
f357bcd4 | 13 | package org.eclipse.tracecompass.ctf.core.event.types; |
866e5b51 | 14 | |
069efcf5 MK |
15 | import static org.eclipse.tracecompass.common.core.NonNullUtils.equalsNullable; |
16 | ||
a4fa4e36 MK |
17 | import java.util.Collection; |
18 | import java.util.Collections; | |
866e5b51 | 19 | import java.util.HashMap; |
0594c61c | 20 | import java.util.Map; |
e00e6663 | 21 | import java.util.Map.Entry; |
866e5b51 | 22 | |
453a59f0 | 23 | import org.eclipse.tracecompass.ctf.core.CTFReaderException; |
f357bcd4 AM |
24 | import org.eclipse.tracecompass.ctf.core.event.io.BitBuffer; |
25 | import org.eclipse.tracecompass.ctf.core.event.scope.IDefinitionScope; | |
a4fa4e36 | 26 | |
866e5b51 | 27 | /** |
d37aaa7f | 28 | * A CTFC variant declaration. |
0594c61c | 29 | * |
d37aaa7f FC |
30 | * A variant is similar to a C union, only taking the minimum size of the types, |
31 | * it is a compound data type that contains other datatypes in fields. they are | |
32 | * stored in an hashmap and indexed by names which are strings. | |
33 | * | |
34 | * @version 1.0 | |
35 | * @author Matthew Khouzam | |
36 | * @author Simon Marchi | |
866e5b51 | 37 | */ |
a4fa4e36 | 38 | public class VariantDeclaration extends Declaration { |
866e5b51 FC |
39 | |
40 | // ------------------------------------------------------------------------ | |
41 | // Attributes | |
42 | // ------------------------------------------------------------------------ | |
43 | ||
a4fa4e36 MK |
44 | private String fTag = null; |
45 | private static final long ALIGNMENT = 1; | |
46 | private final Map<String, IDeclaration> fFields = Collections.synchronizedMap(new HashMap<String, IDeclaration>()); | |
47 | private EnumDefinition fTagDef; | |
48 | private IDeclaration fDeclarationToPopulate; | |
49 | private IDefinitionScope fPrevDefinitionScope; | |
866e5b51 FC |
50 | |
51 | // ------------------------------------------------------------------------ | |
52 | // Constructors | |
53 | // ------------------------------------------------------------------------ | |
54 | ||
9ac2eb62 | 55 | /** |
a511da0d | 56 | * Constructor |
9ac2eb62 | 57 | */ |
866e5b51 FC |
58 | public VariantDeclaration() { |
59 | } | |
60 | ||
61 | // ------------------------------------------------------------------------ | |
62 | // Getters/Setters/Predicates | |
63 | // ------------------------------------------------------------------------ | |
64 | ||
9ac2eb62 MK |
65 | /** |
66 | * @return Does the variant have a tag | |
67 | */ | |
866e5b51 | 68 | public boolean isTagged() { |
a4fa4e36 | 69 | return fTag != null; |
866e5b51 FC |
70 | } |
71 | ||
9ac2eb62 MK |
72 | /** |
73 | * Lookup if a field exists in the variant | |
a4fa4e36 MK |
74 | * |
75 | * @param fieldTag | |
76 | * the field tag name | |
9ac2eb62 MK |
77 | * @return true = field tag exists |
78 | */ | |
866e5b51 | 79 | public boolean hasField(String fieldTag) { |
a4fa4e36 | 80 | return fFields.containsKey(fieldTag); |
866e5b51 FC |
81 | } |
82 | ||
9ac2eb62 MK |
83 | /** |
84 | * Sets the tag in a variant | |
a4fa4e36 MK |
85 | * |
86 | * @param tag | |
87 | * the tag | |
9ac2eb62 | 88 | */ |
866e5b51 | 89 | public void setTag(String tag) { |
a4fa4e36 MK |
90 | fTag = tag; |
91 | fTagDef = null; | |
866e5b51 FC |
92 | } |
93 | ||
9ac2eb62 | 94 | /** |
a511da0d | 95 | * Gets current variant tag |
a4fa4e36 | 96 | * |
9ac2eb62 MK |
97 | * @return the variant tag. |
98 | */ | |
866e5b51 | 99 | public String getTag() { |
a4fa4e36 | 100 | return fTag; |
866e5b51 FC |
101 | } |
102 | ||
9ac2eb62 MK |
103 | /** |
104 | * Gets the fields of the variant | |
a4fa4e36 | 105 | * |
9ac2eb62 MK |
106 | * @return the fields of the variant |
107 | */ | |
0594c61c | 108 | public Map<String, IDeclaration> getFields() { |
a4fa4e36 | 109 | return this.fFields; |
866e5b51 FC |
110 | } |
111 | ||
fd74e6c1 MK |
112 | @Override |
113 | public long getAlignment() { | |
a4fa4e36 | 114 | return ALIGNMENT; |
fd74e6c1 | 115 | } |
a4fa4e36 | 116 | |
866e5b51 FC |
117 | // ------------------------------------------------------------------------ |
118 | // Operations | |
119 | // ------------------------------------------------------------------------ | |
120 | ||
121 | @Override | |
122 | public VariantDefinition createDefinition(IDefinitionScope definitionScope, | |
a4fa4e36 MK |
123 | String fieldName, BitBuffer input) throws CTFReaderException { |
124 | alignRead(input); | |
125 | if (fPrevDefinitionScope != definitionScope) { | |
126 | fTagDef = null; | |
127 | fPrevDefinitionScope = definitionScope; | |
128 | } | |
129 | EnumDefinition tagDef = fTagDef; | |
130 | if (tagDef == null) { | |
131 | Definition def = definitionScope.lookupDefinition(fTag); | |
132 | tagDef = (EnumDefinition) ((def instanceof EnumDefinition) ? def : null); | |
133 | } | |
134 | if (tagDef == null) { | |
135 | throw new CTFReaderException("Tag is not defined " + fTag); //$NON-NLS-1$ | |
136 | } | |
137 | String varFieldName = tagDef.getStringValue(); | |
138 | fDeclarationToPopulate = fFields.get(varFieldName); | |
139 | if (fDeclarationToPopulate == null) { | |
140 | throw new CTFReaderException("Unknown enum selector for variant " + //$NON-NLS-1$ | |
141 | definitionScope.getScopePath().toString()); | |
142 | } | |
143 | Definition fieldValue = fDeclarationToPopulate.createDefinition(definitionScope, fieldName, input); | |
144 | return new VariantDefinition(this, definitionScope, varFieldName, fieldName, fieldValue); | |
866e5b51 FC |
145 | } |
146 | ||
9ac2eb62 | 147 | /** |
be6df2d8 | 148 | * Add a field to this CTF Variant |
9ac2eb62 MK |
149 | * |
150 | * @param fieldTag | |
be6df2d8 | 151 | * The tag of the new field |
9ac2eb62 | 152 | * @param declaration |
be6df2d8 | 153 | * The Declaration of this new field |
9ac2eb62 | 154 | */ |
866e5b51 | 155 | public void addField(String fieldTag, IDeclaration declaration) { |
a4fa4e36 MK |
156 | fFields.put(fieldTag, declaration); |
157 | } | |
158 | ||
159 | /** | |
160 | * gets the tag definition | |
161 | * | |
162 | * @return the fTagDef | |
a4fa4e36 MK |
163 | */ |
164 | public EnumDefinition getTagDef() { | |
165 | return fTagDef; | |
166 | } | |
167 | ||
a4fa4e36 MK |
168 | @Override |
169 | public int getMaximumSize() { | |
170 | Collection<IDeclaration> values = fFields.values(); | |
171 | int maxSize = 0; | |
172 | for (IDeclaration field : values) { | |
173 | maxSize = Math.max(maxSize, field.getMaximumSize()); | |
174 | } | |
175 | return maxSize; | |
866e5b51 FC |
176 | } |
177 | ||
178 | @Override | |
179 | public String toString() { | |
180 | /* Only used for debugging */ | |
66aa25f0 MK |
181 | StringBuilder sb = new StringBuilder(); |
182 | sb.append("[declaration] variant["); //$NON-NLS-1$ | |
183 | for (Entry<String, IDeclaration> field : fFields.entrySet()) { | |
184 | sb.append(field.getKey()).append(':').append(field.getValue()); | |
185 | } | |
186 | sb.append(']'); | |
187 | return sb.toString(); | |
866e5b51 FC |
188 | } |
189 | ||
e00e6663 MK |
190 | @Override |
191 | public int hashCode() { | |
192 | final int prime = 31; | |
193 | int result = 1; | |
194 | result = prime * result + ((fDeclarationToPopulate == null) ? 0 : fDeclarationToPopulate.hashCode()); | |
195 | if (fFields == null) { | |
196 | result = prime * result; | |
197 | } else { | |
198 | for (Entry<String, IDeclaration> field : fFields.entrySet()) { | |
199 | result = prime * result + field.getValue().hashCode(); | |
200 | } | |
201 | } | |
202 | result = prime * result + ((fPrevDefinitionScope == null) ? 0 : fPrevDefinitionScope.hashCode()); | |
203 | result = prime * result + ((fTag == null) ? 0 : fTag.hashCode()); | |
204 | result = prime * result + ((fTagDef == null) ? 0 : fTagDef.hashCode()); | |
205 | return result; | |
206 | } | |
207 | ||
208 | @Override | |
209 | public boolean equals(Object obj) { | |
210 | if (this == obj) { | |
211 | return true; | |
212 | } | |
213 | if (obj == null) { | |
214 | return false; | |
215 | } | |
216 | if (getClass() != obj.getClass()) { | |
217 | return false; | |
218 | } | |
219 | VariantDeclaration other = (VariantDeclaration) obj; | |
220 | if (fDeclarationToPopulate == null) { | |
221 | if (other.fDeclarationToPopulate != null) { | |
222 | return false; | |
223 | } | |
224 | } else if (!fDeclarationToPopulate.equals(other.fDeclarationToPopulate)) { | |
225 | return false; | |
226 | } | |
227 | // do not check the order of the fields | |
228 | ||
069efcf5 MK |
229 | if (!equalsNullable(fFields, other.fFields)) { |
230 | return false; | |
e00e6663 | 231 | } |
069efcf5 | 232 | if (!equalsNullable(fPrevDefinitionScope, other.fPrevDefinitionScope)) { |
e00e6663 MK |
233 | return false; |
234 | } | |
069efcf5 | 235 | if (!equalsNullable(fTag, other.fTag)) { |
e00e6663 MK |
236 | return false; |
237 | } | |
069efcf5 | 238 | if (!equalsNullable(fTagDef, other.fTagDef)){ |
e00e6663 MK |
239 | return false; |
240 | } | |
241 | return true; | |
242 | } | |
243 | ||
66aa25f0 MK |
244 | @Override |
245 | public boolean isBinaryEquivalent(IDeclaration obj) { | |
246 | if (this == obj) { | |
247 | return true; | |
248 | } | |
249 | if (obj == null) { | |
250 | return false; | |
251 | } | |
252 | if (getClass() != obj.getClass()) { | |
253 | return false; | |
254 | } | |
255 | VariantDeclaration other = (VariantDeclaration) obj; | |
256 | if (fFields == null) { | |
257 | if (other.fFields != null) { | |
258 | return false; | |
259 | } | |
260 | } else { | |
261 | if (fFields.size() != other.fFields.size()) { | |
262 | return false; | |
263 | } | |
264 | for (Entry<String, IDeclaration> field : fFields.entrySet()) { | |
265 | if (!other.fFields.containsKey(field.getKey())) { | |
266 | return false; | |
267 | } | |
268 | IDeclaration field2 = other.fFields.get(field.getKey()); | |
269 | if (!field2.isBinaryEquivalent(field.getValue())) { | |
270 | return false; | |
271 | } | |
272 | } | |
273 | } | |
274 | return true; | |
275 | } | |
276 | ||
866e5b51 | 277 | } |