Pierre De Rop | 6e8f921 | 2016-02-20 21:44:59 +0000 | [diff] [blame^] | 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 | */ |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 19 | package org.apache.felix.dm.lambda.impl; |
| 20 | |
| 21 | import java.util.ArrayList; |
| 22 | import java.util.Dictionary; |
| 23 | import java.util.HashMap; |
| 24 | import java.util.List; |
| 25 | import java.util.Map; |
| 26 | import java.util.Objects; |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 27 | import java.util.function.Function; |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 28 | import java.util.stream.Stream; |
| 29 | |
| 30 | import org.apache.felix.dm.BundleDependency; |
| 31 | import org.apache.felix.dm.Component; |
| 32 | import org.apache.felix.dm.DependencyManager; |
| 33 | import org.apache.felix.dm.lambda.BundleDependencyBuilder; |
| 34 | import org.apache.felix.dm.lambda.callbacks.CbBundle; |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 35 | import org.apache.felix.dm.lambda.callbacks.CbBundleComponent; |
| 36 | import org.apache.felix.dm.lambda.callbacks.InstanceCbBundle; |
| 37 | import org.apache.felix.dm.lambda.callbacks.InstanceCbBundleComponent; |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 38 | import org.osgi.framework.Bundle; |
| 39 | |
| 40 | @SuppressWarnings("unchecked") |
| 41 | public class BundleDependencyBuilderImpl implements BundleDependencyBuilder { |
| 42 | private String m_added; |
| 43 | private String m_changed; |
| 44 | private String m_removed; |
| 45 | private Object m_instance; |
| 46 | private boolean m_autoConfig = true; |
| 47 | private boolean m_autoConfigInvoked = false; |
| 48 | private boolean m_required = true; |
| 49 | private Bundle m_bundle; |
| 50 | private String m_filter; |
| 51 | private int m_stateMask = -1; |
| 52 | private boolean m_propagate; |
| 53 | private Object m_propagateInstance; |
| 54 | private String m_propagateMethod; |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 55 | private Function<Bundle, Dictionary<?, ?>> m_propagateCallback; |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 56 | private final Component m_component; |
| 57 | |
| 58 | enum Cb { |
| 59 | ADD, |
| 60 | CHG, |
| 61 | REM |
| 62 | }; |
| 63 | |
| 64 | private final Map<Cb, List<MethodRef<Object>>> m_refs = new HashMap<>(); |
| 65 | |
| 66 | @FunctionalInterface |
| 67 | interface MethodRef<I> { |
| 68 | public void accept(I instance, Component c, Bundle bundle); |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Class used to call a supplier that returns Propagated properties |
| 73 | */ |
| 74 | private class Propagate { |
| 75 | @SuppressWarnings("unused") |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 76 | Dictionary<?, ?> propagate(Bundle bundle) { |
| 77 | return m_propagateCallback.apply(bundle); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 78 | } |
| 79 | } |
| 80 | |
| 81 | public BundleDependencyBuilderImpl (Component component) { |
| 82 | m_component = component; |
| 83 | } |
| 84 | |
| 85 | @Override |
| 86 | public BundleDependencyBuilder autoConfig(boolean autoConfig) { |
| 87 | m_autoConfig = autoConfig; |
| 88 | m_autoConfigInvoked = true; |
| 89 | return this; |
| 90 | } |
| 91 | |
| 92 | @Override |
| 93 | public BundleDependencyBuilder autoConfig() { |
| 94 | autoConfig(true); |
| 95 | return this; |
| 96 | } |
| 97 | |
| 98 | @Override |
| 99 | public BundleDependencyBuilder required(boolean required) { |
| 100 | m_required = required; |
| 101 | return this; |
| 102 | } |
| 103 | |
| 104 | @Override |
| 105 | public BundleDependencyBuilder required() { |
| 106 | required(true); |
| 107 | return this; |
| 108 | } |
| 109 | |
| 110 | @Override |
| 111 | public BundleDependencyBuilder bundle(Bundle bundle) { |
| 112 | m_bundle = bundle; |
| 113 | return this; |
| 114 | } |
| 115 | |
| 116 | @Override |
| 117 | public BundleDependencyBuilder filter(String filter) throws IllegalArgumentException { |
| 118 | m_filter = filter; |
| 119 | return this; |
| 120 | } |
| 121 | |
| 122 | @Override |
| 123 | public BundleDependencyBuilder mask(int mask) { |
| 124 | m_stateMask = mask; |
| 125 | return this; |
| 126 | } |
| 127 | |
| 128 | @Override |
| 129 | public BundleDependencyBuilder propagate(boolean propagate) { |
| 130 | m_propagate = propagate; |
| 131 | return this; |
| 132 | } |
| 133 | |
| 134 | @Override |
| 135 | public BundleDependencyBuilder propagate() { |
| 136 | propagate(true); |
| 137 | return this; |
| 138 | } |
| 139 | |
| 140 | @Override |
| 141 | public BundleDependencyBuilder propagate(Object instance, String method) { |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 142 | if (m_propagateCallback != null || m_propagate) throw new IllegalStateException("Propagate callback already set."); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 143 | Objects.nonNull(method); |
| 144 | Objects.nonNull(instance); |
| 145 | m_propagateInstance = instance; |
| 146 | m_propagateMethod = method; |
| 147 | return this; |
| 148 | } |
| 149 | |
| 150 | @Override |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 151 | public BundleDependencyBuilder propagate(Function<Bundle, Dictionary<?, ?>> instance) { |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 152 | if (m_propagateInstance != null || m_propagate) throw new IllegalStateException("Propagate callback already set."); |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 153 | m_propagateCallback = instance; |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 154 | return this; |
| 155 | } |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 156 | |
| 157 | @Override |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 158 | public BundleDependencyBuilder callbackInstance(Object callbackInstance) { |
| 159 | m_instance = callbackInstance; |
| 160 | return this; |
| 161 | } |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 162 | |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 163 | @Override |
| 164 | public BundleDependencyBuilder add(String add) { |
| 165 | callbacks(add, null, null); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 166 | return this; |
| 167 | } |
| 168 | |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 169 | @Override |
| 170 | public BundleDependencyBuilder change(String change) { |
| 171 | callbacks(null, change, null); |
| 172 | return this; |
| 173 | } |
| 174 | |
| 175 | @Override |
| 176 | public BundleDependencyBuilder remove(String remove) { |
| 177 | callbacks(null, null, remove); |
| 178 | return this; |
| 179 | } |
| 180 | |
| 181 | private BundleDependencyBuilder callbacks(String added, String changed, String removed) { |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 182 | requiresNoMethodRefs(); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 183 | m_added = added != null ? added : m_added; |
| 184 | m_changed = changed != null ? changed : m_changed; |
| 185 | m_removed = removed != null ? removed : m_removed; |
| 186 | if (! m_autoConfigInvoked) m_autoConfig = false; |
| 187 | return this; |
| 188 | } |
| 189 | |
| 190 | @Override |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 191 | public <T> BundleDependencyBuilder add(CbBundle<T> add) { |
| 192 | return callbacks(add, null, null); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | @Override |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 196 | public <T> BundleDependencyBuilder change(CbBundle<T> change) { |
| 197 | return callbacks(null, change, null); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | @Override |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 201 | public <T> BundleDependencyBuilder remove(CbBundle<T> remove) { |
| 202 | return callbacks(null, null, remove); |
| 203 | } |
| 204 | |
| 205 | private <T> BundleDependencyBuilder callbacks(CbBundle<T> add, CbBundle<T> change, CbBundle<T> remove) { |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 206 | if (add != null) { |
| 207 | setComponentCallbackRef(Cb.ADD, Helpers.getLambdaArgType(add, 0), (inst, component, bundle) -> add.accept ((T) inst, bundle)); |
| 208 | } |
| 209 | if (change != null) { |
| 210 | setComponentCallbackRef(Cb.CHG, Helpers.getLambdaArgType(change, 0), (inst, component, bundle) -> change.accept ((T) inst, bundle)); |
| 211 | } |
| 212 | if (remove != null) { |
| 213 | setComponentCallbackRef(Cb.REM, Helpers.getLambdaArgType(remove, 0), (inst, component, bundle) -> remove.accept ((T) inst, bundle)); |
| 214 | } |
| 215 | return this; |
| 216 | } |
| 217 | |
| 218 | @Override |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 219 | public <T> BundleDependencyBuilder add(CbBundleComponent<T> add) { |
| 220 | return callbacks(add, null, null); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | @Override |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 224 | public <T> BundleDependencyBuilder change(CbBundleComponent<T> change) { |
| 225 | return callbacks(null, change, null); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 226 | } |
| 227 | |
| 228 | @Override |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 229 | public <T> BundleDependencyBuilder remove(CbBundleComponent<T> remove) { |
| 230 | return callbacks(null, null, remove); |
| 231 | } |
| 232 | |
| 233 | private <T> BundleDependencyBuilder callbacks(CbBundleComponent<T> add, CbBundleComponent<T> change, CbBundleComponent<T> remove) { |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 234 | if (add != null) { |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 235 | setComponentCallbackRef(Cb.ADD, Helpers.getLambdaArgType(add, 0), (inst, component, bundle) -> add.accept ((T) inst, bundle, component)); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 236 | } |
| 237 | if (change != null) { |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 238 | setComponentCallbackRef(Cb.CHG, Helpers.getLambdaArgType(change, 0), (inst, component, bundle) -> change.accept ((T) inst, bundle, component)); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 239 | } |
| 240 | if (remove != null) { |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 241 | setComponentCallbackRef(Cb.REM, Helpers.getLambdaArgType(remove, 0), (inst, component, bundle) -> remove.accept ((T) inst, bundle, component)); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 242 | } |
| 243 | return this; |
| 244 | } |
| 245 | |
| 246 | @Override |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 247 | public BundleDependencyBuilder add(InstanceCbBundle add) { |
| 248 | return callbacks(add, null, null); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 249 | } |
| 250 | |
| 251 | @Override |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 252 | public BundleDependencyBuilder change(InstanceCbBundle change) { |
| 253 | return callbacks(null, change, null); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | @Override |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 257 | public BundleDependencyBuilder remove(InstanceCbBundle remove) { |
| 258 | return callbacks(null, null, remove); |
| 259 | } |
| 260 | |
| 261 | private BundleDependencyBuilder callbacks(InstanceCbBundle add, InstanceCbBundle change, InstanceCbBundle remove) { |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 262 | if (add != null) setInstanceCallbackRef(Cb.ADD, (inst, component, bundle) -> add.accept(bundle)); |
| 263 | if (change != null) setInstanceCallbackRef(Cb.CHG, (inst, component, bundle) -> change.accept(bundle)); |
| 264 | if (remove != null) setInstanceCallbackRef(Cb.REM, (inst, component, bundle) -> remove.accept(bundle)); |
| 265 | return this; |
| 266 | } |
| 267 | |
| 268 | @Override |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 269 | public BundleDependencyBuilder add(InstanceCbBundleComponent add) { |
| 270 | return callbacks(add, null, null); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 271 | } |
| 272 | |
| 273 | @Override |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 274 | public BundleDependencyBuilder change(InstanceCbBundleComponent add) { |
| 275 | return callbacks(add, null, null); |
| 276 | } |
| 277 | |
| 278 | @Override |
| 279 | public BundleDependencyBuilder remove(InstanceCbBundleComponent remove) { |
| 280 | return callbacks(null, null, remove); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 281 | } |
| 282 | |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 283 | private BundleDependencyBuilder callbacks(InstanceCbBundleComponent add, InstanceCbBundleComponent change, InstanceCbBundleComponent remove) { |
| 284 | if (add != null) setInstanceCallbackRef(Cb.ADD, (inst, component, bundle) -> add.accept(bundle, component)); |
| 285 | if (change != null) setInstanceCallbackRef(Cb.CHG, (inst, component, bundle) -> change.accept(bundle, component)); |
| 286 | if (remove != null) setInstanceCallbackRef(Cb.REM, (inst, component, bundle) -> remove.accept(bundle, component)); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 287 | return this; |
| 288 | } |
| 289 | |
| 290 | @Override |
| 291 | public BundleDependency build() { |
| 292 | DependencyManager dm = m_component.getDependencyManager(); |
| 293 | |
| 294 | BundleDependency dep = dm.createBundleDependency(); |
| 295 | dep.setRequired(m_required); |
| 296 | |
| 297 | if (m_filter != null) { |
| 298 | dep.setFilter(m_filter); |
| 299 | } |
| 300 | |
| 301 | if (m_bundle != null) { |
| 302 | dep.setBundle(m_bundle); |
| 303 | } |
| 304 | |
| 305 | if (m_stateMask != -1) { |
| 306 | dep.setStateMask(m_stateMask); |
| 307 | } |
| 308 | |
| 309 | if (m_propagate) { |
| 310 | dep.setPropagate(true); |
| 311 | } else if (m_propagateInstance != null) { |
| 312 | dep.setPropagate(m_propagateInstance, m_propagateMethod); |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 313 | } else if (m_propagateCallback != null) { |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 314 | dep.setPropagate(new Propagate(), "propagate"); |
| 315 | } |
| 316 | |
| 317 | if (m_added != null || m_changed != null || m_removed != null) { |
| 318 | dep.setCallbacks(m_instance, m_added, m_changed, m_removed); |
| 319 | } else if (m_refs.size() > 0) { |
| 320 | Object cb = createCallbackInstance(); |
| 321 | dep.setCallbacks(cb, "add", "change", "remove"); |
| 322 | } |
| 323 | |
| 324 | dep.setAutoConfig(m_autoConfig); |
| 325 | return dep; |
| 326 | } |
| 327 | |
| 328 | private <T> BundleDependencyBuilder setInstanceCallbackRef(Cb cbType, MethodRef<T> ref) { |
| 329 | requiresNoStringCallbacks(); |
| 330 | if (! m_autoConfigInvoked) m_autoConfig = false; |
| 331 | List<MethodRef<Object>> list = m_refs.computeIfAbsent(cbType, l -> new ArrayList<>()); |
| 332 | list.add((instance, component, bundle) -> ref.accept(null, component, bundle)); |
| 333 | return this; |
| 334 | } |
| 335 | |
| 336 | private <T> BundleDependencyBuilder setComponentCallbackRef(Cb cbType, Class<T> type, MethodRef<T> ref) { |
| 337 | requiresNoStringCallbacks(); |
| 338 | if (! m_autoConfigInvoked) m_autoConfig = false; |
| 339 | List<MethodRef<Object>> list = m_refs.computeIfAbsent(cbType, l -> new ArrayList<>()); |
| 340 | list.add((instance, component, bundle) -> { |
| 341 | Object componentImpl = Stream.of(component.getInstances()) |
| 342 | .filter(impl -> Helpers.getClass(impl).equals(type)) |
| 343 | .findFirst() |
| 344 | .orElseThrow(() -> new IllegalStateException("The method reference " + ref + " does not match any available component impl classes.")); |
| 345 | ref.accept((T) componentImpl, component, bundle); |
| 346 | }); |
| 347 | return this; |
| 348 | } |
| 349 | |
| 350 | @SuppressWarnings("unused") |
| 351 | private Object createCallbackInstance() { |
| 352 | Object cb = null; |
| 353 | |
| 354 | cb = new Object() { |
| 355 | void add(Component c, Bundle bundle) { |
| 356 | invokeMethodRefs(Cb.ADD, c, bundle); |
| 357 | } |
| 358 | |
| 359 | void change(Component c, Bundle bundle) { |
| 360 | invokeMethodRefs(Cb.CHG, c, bundle); |
| 361 | } |
| 362 | |
| 363 | void remove(Component c, Bundle bundle) { |
| 364 | invokeMethodRefs(Cb.REM, c, bundle); |
| 365 | } |
| 366 | }; |
| 367 | |
| 368 | return cb; |
| 369 | } |
| 370 | |
| 371 | private void invokeMethodRefs(Cb cbType, Component c, Bundle bundle) { |
| 372 | m_refs.computeIfPresent(cbType, (k, mrefs) -> { |
| 373 | mrefs.forEach(mref -> mref.accept(null, c, bundle)); |
| 374 | return mrefs; |
| 375 | }); |
| 376 | } |
| 377 | |
| 378 | private void requiresNoStringCallbacks() { |
| 379 | if (m_added != null || m_changed != null || m_removed != null) { |
| 380 | throw new IllegalStateException("can't mix method references and string callbacks."); |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | private void requiresNoMethodRefs() { |
| 385 | if (m_refs.size() > 0) { |
| 386 | throw new IllegalStateException("can't mix method references and string callbacks."); |
| 387 | } |
| 388 | } |
| 389 | } |