| 1 | /* |
| 2 | * jDTAUS Core RI Client Container |
| 3 | * Copyright (C) 2005 Christian Schulte |
| 4 | * <cs@schulte.it> |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or any later version. |
| 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with this library; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | * |
| 20 | */ |
| 21 | package org.jdtaus.core.container.ri.client; |
| 22 | |
| 23 | import java.lang.reflect.Array; |
| 24 | import java.lang.reflect.Constructor; |
| 25 | import java.lang.reflect.InvocationTargetException; |
| 26 | import java.lang.reflect.Method; |
| 27 | import java.text.MessageFormat; |
| 28 | import java.util.ArrayList; |
| 29 | import java.util.List; |
| 30 | import java.util.Locale; |
| 31 | import java.util.Map; |
| 32 | import java.util.logging.Level; |
| 33 | import java.util.logging.Logger; |
| 34 | import org.jdtaus.core.container.Container; |
| 35 | import org.jdtaus.core.container.ContainerError; |
| 36 | import org.jdtaus.core.container.ContainerInitializer; |
| 37 | import org.jdtaus.core.container.ContextFactory; |
| 38 | import org.jdtaus.core.container.ContextInitializer; |
| 39 | import org.jdtaus.core.container.Dependency; |
| 40 | import org.jdtaus.core.container.DependencyCycleException; |
| 41 | import org.jdtaus.core.container.Implementation; |
| 42 | import org.jdtaus.core.container.MissingImplementationException; |
| 43 | import org.jdtaus.core.container.Model; |
| 44 | import org.jdtaus.core.container.ModelFactory; |
| 45 | import org.jdtaus.core.container.MultiplicityConstraintException; |
| 46 | import org.jdtaus.core.container.Specification; |
| 47 | import org.jdtaus.core.container.ri.client.versioning.VersionParser; |
| 48 | |
| 49 | /** |
| 50 | * {@code Container} reference implementation. |
| 51 | * |
| 52 | * @author <a href="mailto:cs@schulte.it">Christian Schulte</a> |
| 53 | * @version $JDTAUS: DefaultContainer.java 8743 2012-10-07 03:06:20Z schulte $ |
| 54 | * |
| 55 | * @see org.jdtaus.core.container.ContainerFactory |
| 56 | */ |
| 57 | public class DefaultContainer implements Container |
| 58 | { |
| 59 | //--Constants--------------------------------------------------------------- |
| 60 | |
| 61 | /** Empty Class-Array. */ |
| 62 | private static final Class[] EMPTY = |
| 63 | { |
| 64 | }; |
| 65 | |
| 66 | /** Implementation Class-Array. */ |
| 67 | private static final Class[] IMPL_CTOR = |
| 68 | { |
| 69 | Implementation.class |
| 70 | }; |
| 71 | |
| 72 | /** Dependency Class-Array. */ |
| 73 | private static final Class[] DEP_CTOR = |
| 74 | { |
| 75 | Dependency.class |
| 76 | }; |
| 77 | |
| 78 | /** Array of scope implementations. */ |
| 79 | private static final Scope[] SCOPES = |
| 80 | { |
| 81 | null, new ContextScope(), new SingletonScope() |
| 82 | }; |
| 83 | |
| 84 | //---------------------------------------------------------------Constants-- |
| 85 | //--Container--------------------------------------------------------------- |
| 86 | |
| 87 | /** Mutex used to detect cyclic instantiations. */ |
| 88 | private final Object cycle = new Object(); |
| 89 | |
| 90 | /** Maps objects to model object. */ |
| 91 | private final Map objects = new WeakIdentityHashMap( 1024 ); |
| 92 | |
| 93 | public Object getObject( final Class specification ) |
| 94 | { |
| 95 | if ( specification == null ) |
| 96 | { |
| 97 | throw new NullPointerException( "specification" ); |
| 98 | } |
| 99 | |
| 100 | return this.getObjectInternal( this.getClassLoader( specification ), |
| 101 | specification.getName(), null, false ); |
| 102 | |
| 103 | } |
| 104 | |
| 105 | public Object getObject( final Class specification, |
| 106 | final String implementationName ) |
| 107 | { |
| 108 | if ( specification == null ) |
| 109 | { |
| 110 | throw new NullPointerException( "specification" ); |
| 111 | } |
| 112 | if ( implementationName == null ) |
| 113 | { |
| 114 | throw new NullPointerException( "implementationName" ); |
| 115 | } |
| 116 | |
| 117 | return this.getObjectInternal( this.getClassLoader( specification ), |
| 118 | specification.getName(), |
| 119 | implementationName, true ); |
| 120 | |
| 121 | } |
| 122 | |
| 123 | public Object getDependency( final Object object, |
| 124 | final String dependencyName ) |
| 125 | { |
| 126 | if ( object == null ) |
| 127 | { |
| 128 | throw new NullPointerException( "object" ); |
| 129 | } |
| 130 | if ( dependencyName == null ) |
| 131 | { |
| 132 | throw new NullPointerException( "dependencyName" ); |
| 133 | } |
| 134 | |
| 135 | try |
| 136 | { |
| 137 | final Implementation impl = this.getImplementation( object ); |
| 138 | final Instance instance = this.getInstance( object, impl ); |
| 139 | |
| 140 | synchronized ( instance ) |
| 141 | { |
| 142 | return this.getDependency( |
| 143 | instance.getClassLoader(), instance, |
| 144 | impl.getDependencies().getDependency( dependencyName ) ); |
| 145 | |
| 146 | } |
| 147 | } |
| 148 | catch ( final ClassNotFoundException e ) |
| 149 | { |
| 150 | throw new ContainerError( e ); |
| 151 | } |
| 152 | catch ( final NoSuchMethodException e ) |
| 153 | { |
| 154 | throw new ContainerError( e ); |
| 155 | } |
| 156 | catch ( final IllegalAccessException e ) |
| 157 | { |
| 158 | throw new ContainerError( e ); |
| 159 | } |
| 160 | catch ( final InvocationTargetException e ) |
| 161 | { |
| 162 | throw new ContainerError( e ); |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | public Object getProperty( final Object object, |
| 167 | final String propertyName ) |
| 168 | { |
| 169 | if ( object == null ) |
| 170 | { |
| 171 | throw new NullPointerException( "object" ); |
| 172 | } |
| 173 | if ( propertyName == null ) |
| 174 | { |
| 175 | throw new NullPointerException( "propertyName" ); |
| 176 | } |
| 177 | |
| 178 | return this.getInstance( object, this.getImplementation( object ) ). |
| 179 | getProperties().getProperty( propertyName ).getValue(); |
| 180 | |
| 181 | } |
| 182 | |
| 183 | public String getMessage( final Object object, final String messageName, |
| 184 | final Locale locale, final Object arguments ) |
| 185 | { |
| 186 | if ( object == null ) |
| 187 | { |
| 188 | throw new NullPointerException( "object" ); |
| 189 | } |
| 190 | if ( locale == null ) |
| 191 | { |
| 192 | throw new NullPointerException( "locale" ); |
| 193 | } |
| 194 | if ( messageName == null ) |
| 195 | { |
| 196 | throw new NullPointerException( "messageName" ); |
| 197 | } |
| 198 | |
| 199 | return new MessageFormat( |
| 200 | this.getInstance( object, this.getImplementation( object ) ). |
| 201 | getMessages().getMessage( messageName ).getTemplate(). |
| 202 | getValue( locale ), locale ).format( arguments ); |
| 203 | |
| 204 | } |
| 205 | |
| 206 | public final Object getObject( final String specificationIdentifier ) |
| 207 | { |
| 208 | return this.getObjectInternal( this.getClassLoader( this.getClass() ), |
| 209 | specificationIdentifier, null, |
| 210 | false ); |
| 211 | |
| 212 | } |
| 213 | |
| 214 | public final Object getObject( final String specificationIdentifier, |
| 215 | final String implementationName ) |
| 216 | { |
| 217 | return this.getObjectInternal( this.getClassLoader( this.getClass() ), |
| 218 | specificationIdentifier, |
| 219 | implementationName, true ); |
| 220 | |
| 221 | } |
| 222 | |
| 223 | public final String getMessage( final Object object, |
| 224 | final String messageName, |
| 225 | final Object arguments ) |
| 226 | { |
| 227 | if ( object == null ) |
| 228 | { |
| 229 | throw new NullPointerException( "object" ); |
| 230 | } |
| 231 | if ( messageName == null ) |
| 232 | { |
| 233 | throw new NullPointerException( "messageName" ); |
| 234 | } |
| 235 | |
| 236 | return this.getMessage( object, messageName, Locale.getDefault(), |
| 237 | arguments ); |
| 238 | |
| 239 | } |
| 240 | |
| 241 | public final Object getImplementation( |
| 242 | final Class specification, final String implementationName ) |
| 243 | { |
| 244 | if ( specification == null ) |
| 245 | { |
| 246 | throw new NullPointerException( "specification" ); |
| 247 | } |
| 248 | if ( implementationName == null ) |
| 249 | { |
| 250 | throw new NullPointerException( "implementationName" ); |
| 251 | } |
| 252 | |
| 253 | return this.getObject( specification, implementationName ); |
| 254 | } |
| 255 | |
| 256 | public final Object getDependency( |
| 257 | final Class implementation, final String dependencyName ) |
| 258 | { |
| 259 | if ( implementation == null ) |
| 260 | { |
| 261 | throw new NullPointerException( "implementation" ); |
| 262 | } |
| 263 | if ( dependencyName == null ) |
| 264 | { |
| 265 | throw new NullPointerException( "dependencyName" ); |
| 266 | } |
| 267 | |
| 268 | try |
| 269 | { |
| 270 | final Object dependencyObject = this.getDependency( |
| 271 | this.getClassLoader( implementation ), null, |
| 272 | ModelFactory.getModel().getModules(). |
| 273 | getImplementation( implementation.getName() ). |
| 274 | getDependencies().getDependency( dependencyName ) ); |
| 275 | |
| 276 | this.initializeContext( dependencyObject ); |
| 277 | return dependencyObject; |
| 278 | } |
| 279 | catch ( final ClassNotFoundException e ) |
| 280 | { |
| 281 | throw new ContainerError( e ); |
| 282 | } |
| 283 | catch ( final NoSuchMethodException e ) |
| 284 | { |
| 285 | throw new ContainerError( e ); |
| 286 | } |
| 287 | catch ( final IllegalAccessException e ) |
| 288 | { |
| 289 | throw new ContainerError( e ); |
| 290 | } |
| 291 | catch ( final InvocationTargetException e ) |
| 292 | { |
| 293 | throw new ContainerError( e ); |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | //---------------------------------------------------------------Container-- |
| 298 | //--DefaultContainer-------------------------------------------------------- |
| 299 | |
| 300 | /** Creates a new {@code DefaultContainer} instance. */ |
| 301 | public DefaultContainer() |
| 302 | { |
| 303 | super(); |
| 304 | } |
| 305 | |
| 306 | /** |
| 307 | * Creates a new instance of an implementation. |
| 308 | * <p>The reference implementation loads the class corresponding to the |
| 309 | * implementation and creates a new instance of that class by calling the |
| 310 | * constructor taking an {@code Implementation} as an argument.</p> |
| 311 | * |
| 312 | * @param classLoader The classloader to use for loading classes. |
| 313 | * @param impl the implementation to return a new instance for. |
| 314 | * |
| 315 | * @return a new instance of the class corresponding to {@code impl}. |
| 316 | * |
| 317 | * @throws NullPointerException if {@code classLoader} or {@code impl} is |
| 318 | * {@code null}. |
| 319 | * @throws org.jdtaus.core.container.InstantiationException |
| 320 | * if no instance can be created. |
| 321 | * @deprecated Replaced by {@link #instantiateObject(org.jdtaus.core.container.ri.client.Instance) |
| 322 | */ |
| 323 | private Object instantiateImplementation( final ClassLoader classLoader, |
| 324 | final Implementation impl ) |
| 325 | { |
| 326 | if ( classLoader == null ) |
| 327 | { |
| 328 | throw new NullPointerException( "classLoader" ); |
| 329 | } |
| 330 | if ( impl == null ) |
| 331 | { |
| 332 | throw new NullPointerException( "impl" ); |
| 333 | } |
| 334 | |
| 335 | Constructor ctor = null; |
| 336 | |
| 337 | try |
| 338 | { |
| 339 | final Class clazz = Class.forName( impl.getIdentifier(), true, |
| 340 | classLoader ); |
| 341 | |
| 342 | ctor = clazz.getDeclaredConstructor( IMPL_CTOR ); |
| 343 | ctor.setAccessible( true ); |
| 344 | |
| 345 | final Object object = ctor.newInstance( new Object[] |
| 346 | { |
| 347 | impl |
| 348 | } ); |
| 349 | |
| 350 | return object; |
| 351 | } |
| 352 | catch ( final Throwable e ) |
| 353 | { |
| 354 | throw new org.jdtaus.core.container.InstantiationException( |
| 355 | impl.getIdentifier(), e ); |
| 356 | |
| 357 | } |
| 358 | finally |
| 359 | { |
| 360 | if ( ctor != null ) |
| 361 | { |
| 362 | ctor.setAccessible( false ); |
| 363 | } |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | /** |
| 368 | * Creates a new instance of a dependency. |
| 369 | * <p>The reference implementation loads the class corresponding to the |
| 370 | * dependency and creates a new instance of that class by calling the |
| 371 | * constructor taking a {@code Dependency} as an argument.</p> |
| 372 | * |
| 373 | * @param classLoader The classloader to use for loading classes. |
| 374 | * @param dep the dependency to return a new instance for. |
| 375 | * |
| 376 | * @return a new instance of the class corresponding to {@code dep}. |
| 377 | * |
| 378 | * @throws NullPointerException if {@code classLoader} or {@code dep} is |
| 379 | * {@code null}. |
| 380 | * @throws org.jdtaus.core.container.InstantiationException |
| 381 | * if no instance can be created. |
| 382 | * @deprecated Replaced by {@link #instantiateObject(org.jdtaus.core.container.ri.client.Instance) |
| 383 | */ |
| 384 | private Object instantiateDependency( final ClassLoader classLoader, |
| 385 | final Dependency dep ) |
| 386 | { |
| 387 | if ( classLoader == null ) |
| 388 | { |
| 389 | throw new NullPointerException( "classLoader" ); |
| 390 | } |
| 391 | if ( dep == null ) |
| 392 | { |
| 393 | throw new NullPointerException( "dep" ); |
| 394 | } |
| 395 | |
| 396 | Constructor ctor = null; |
| 397 | |
| 398 | try |
| 399 | { |
| 400 | final Class clazz = Class.forName( dep.getImplementation(). |
| 401 | getIdentifier(), true, classLoader ); |
| 402 | |
| 403 | ctor = clazz.getDeclaredConstructor( DEP_CTOR ); |
| 404 | ctor.setAccessible( true ); |
| 405 | |
| 406 | final Object object = ctor.newInstance( new Object[] |
| 407 | { |
| 408 | dep |
| 409 | } ); |
| 410 | |
| 411 | return object; |
| 412 | } |
| 413 | catch ( final Throwable e ) |
| 414 | { |
| 415 | throw new org.jdtaus.core.container.InstantiationException( |
| 416 | dep.getImplementation().getIdentifier(), e ); |
| 417 | |
| 418 | } |
| 419 | finally |
| 420 | { |
| 421 | if ( ctor != null ) |
| 422 | { |
| 423 | ctor.setAccessible( false ); |
| 424 | } |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | /** |
| 429 | * Performs initialization of an object. |
| 430 | * |
| 431 | * @param object The object to initialize. |
| 432 | * |
| 433 | * @throws NullPointerException if {@code object} is {@code null}. |
| 434 | * @throws Exception if initialization fails. |
| 435 | */ |
| 436 | private void initializeObject( final Object object ) throws Exception |
| 437 | { |
| 438 | if ( object == null ) |
| 439 | { |
| 440 | throw new NullPointerException( "object" ); |
| 441 | } |
| 442 | |
| 443 | if ( object instanceof ContainerInitializer ) |
| 444 | { |
| 445 | ( (ContainerInitializer) object ).initialize(); |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | /** |
| 450 | * Performs context initialization of an object. |
| 451 | * |
| 452 | * @param object The object to perform context initialization with. |
| 453 | * |
| 454 | * @throws NullPointerException if {@code object} is {@code null}. |
| 455 | * @throws org.jdtaus.core.container.ContextError for unrecoverable context |
| 456 | * errors. |
| 457 | */ |
| 458 | private void initializeContext( final Object object ) |
| 459 | { |
| 460 | if ( object == null ) |
| 461 | { |
| 462 | throw new NullPointerException( "object" ); |
| 463 | } |
| 464 | |
| 465 | if ( object instanceof ContextInitializer && |
| 466 | !( (ContextInitializer) object ).isInitialized( |
| 467 | ContextFactory.getContext() ) ) |
| 468 | { |
| 469 | ( (ContextInitializer) object ).initialize( |
| 470 | ContextFactory.getContext() ); |
| 471 | |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | private Object getObjectInternal( final ClassLoader classLoader, |
| 476 | final String specificationIdentifier, |
| 477 | final String implementationName, |
| 478 | final boolean implementationNameWarning ) |
| 479 | { |
| 480 | if ( classLoader == null ) |
| 481 | { |
| 482 | throw new NullPointerException( "classLoader" ); |
| 483 | } |
| 484 | if ( specificationIdentifier == null ) |
| 485 | { |
| 486 | throw new NullPointerException( "specificationIdentifier" ); |
| 487 | } |
| 488 | |
| 489 | try |
| 490 | { |
| 491 | final Object object; |
| 492 | final Specification specification = ModelFactory.getModel(). |
| 493 | getModules().getSpecification( specificationIdentifier ); |
| 494 | |
| 495 | if ( implementationName != null ) |
| 496 | { |
| 497 | final Class specClass = |
| 498 | Class.forName( specification.getIdentifier(), true, |
| 499 | classLoader ); |
| 500 | |
| 501 | final Implementation implementation = |
| 502 | specification.getImplementation( implementationName ); |
| 503 | |
| 504 | final Instance instance = new Instance( |
| 505 | classLoader, specification.getScope(), |
| 506 | implementation.getIdentifier(), |
| 507 | implementation.getModelVersion(), |
| 508 | implementation.getModuleName() ); |
| 509 | |
| 510 | instance.setImplementation( implementation ); |
| 511 | object = this.requestImplementation( |
| 512 | specClass, specification, this.getObject( instance ) ); |
| 513 | |
| 514 | } |
| 515 | else |
| 516 | { |
| 517 | if ( implementationNameWarning ) |
| 518 | { |
| 519 | final Throwable x = new Throwable(); |
| 520 | final StackTraceElement[] elements = x.getStackTrace(); |
| 521 | |
| 522 | String cname = "unknown"; |
| 523 | String method = "unknown"; |
| 524 | StackTraceElement caller = null; |
| 525 | |
| 526 | if ( elements != null && elements.length > 2 ) |
| 527 | { |
| 528 | caller = elements[2]; |
| 529 | cname = caller.getClassName(); |
| 530 | method = caller.getMethodName(); |
| 531 | } |
| 532 | |
| 533 | Logger.getLogger( DefaultContainer.class.getName() ). |
| 534 | log( Level.SEVERE, DefaultContainerBundle.getInstance(). |
| 535 | getNullImplementationNameWarningMessage( |
| 536 | Locale.getDefault(), specificationIdentifier, cname, |
| 537 | method ), x ); |
| 538 | |
| 539 | } |
| 540 | |
| 541 | object = this.resolveImplementation( classLoader, |
| 542 | specification ); |
| 543 | |
| 544 | } |
| 545 | |
| 546 | return object; |
| 547 | } |
| 548 | catch ( final IllegalAccessException e ) |
| 549 | { |
| 550 | // Cannot happen - method got set accessible. |
| 551 | throw new AssertionError( e ); |
| 552 | } |
| 553 | catch ( final InvocationTargetException e ) |
| 554 | { |
| 555 | throw new ContainerError( e ); |
| 556 | } |
| 557 | catch ( final NoSuchMethodException e ) |
| 558 | { |
| 559 | throw new ContainerError( e ); |
| 560 | } |
| 561 | catch ( final ClassNotFoundException e ) |
| 562 | { |
| 563 | throw new ContainerError( e ); |
| 564 | } |
| 565 | } |
| 566 | |
| 567 | private Object getObject( final Instance instance ) |
| 568 | { |
| 569 | return this.getScopedObject( |
| 570 | SCOPES[instance.getScope() - Specification.SCOPE_MULTITON], |
| 571 | instance ); |
| 572 | |
| 573 | } |
| 574 | |
| 575 | private Object instantiateObject( final Instance instance ) |
| 576 | { |
| 577 | try |
| 578 | { |
| 579 | Object object = null; |
| 580 | |
| 581 | if ( VersionParser.compare( instance.getModelVersion(), |
| 582 | "1.3" ) < 0 ) |
| 583 | { |
| 584 | if ( instance.getImplementation() != null ) |
| 585 | { |
| 586 | object = this.instantiateImplementation( |
| 587 | instance.getClassLoader(), |
| 588 | instance.getImplementation() ); |
| 589 | |
| 590 | } |
| 591 | else if ( instance.getDependency() != null ) |
| 592 | { |
| 593 | object = this.instantiateDependency( |
| 594 | instance.getClassLoader(), |
| 595 | instance.getDependency() ); |
| 596 | |
| 597 | } |
| 598 | else |
| 599 | { |
| 600 | throw new AssertionError(); |
| 601 | } |
| 602 | } |
| 603 | else |
| 604 | { |
| 605 | final Class clazz = Class.forName( |
| 606 | instance.getClassName(), true, instance.getClassLoader() ); |
| 607 | |
| 608 | if ( Model.class.getName().equals( instance.getModuleName() ) ) |
| 609 | { |
| 610 | // Automatically discovered default implementations must use |
| 611 | // the static getDefault method. |
| 612 | final Method accessor = |
| 613 | clazz.getMethod( "getDefault", EMPTY ); |
| 614 | |
| 615 | object = accessor.invoke( null, EMPTY ); |
| 616 | } |
| 617 | else |
| 618 | { |
| 619 | object = clazz.newInstance(); |
| 620 | } |
| 621 | } |
| 622 | |
| 623 | synchronized ( this.objects ) |
| 624 | { |
| 625 | this.objects.put( object, instance ); |
| 626 | } |
| 627 | |
| 628 | this.initializeObject( object ); |
| 629 | return object; |
| 630 | } |
| 631 | catch ( final Throwable t ) |
| 632 | { |
| 633 | if ( t instanceof Error ) |
| 634 | { |
| 635 | throw (Error) t; |
| 636 | } |
| 637 | else if ( t instanceof RuntimeException ) |
| 638 | { |
| 639 | throw (RuntimeException) t; |
| 640 | } |
| 641 | else |
| 642 | { |
| 643 | throw new org.jdtaus.core.container.InstantiationException( |
| 644 | instance.getClassName(), t ); |
| 645 | |
| 646 | } |
| 647 | } |
| 648 | } |
| 649 | |
| 650 | private Implementation getImplementation( final Object object ) |
| 651 | { |
| 652 | MissingImplementationException exception = null; |
| 653 | Implementation implementation = null; |
| 654 | Class clazz = object.getClass(); |
| 655 | |
| 656 | do |
| 657 | { |
| 658 | try |
| 659 | { |
| 660 | implementation = ModelFactory.getModel().getModules(). |
| 661 | getImplementation( clazz.getName() ); |
| 662 | |
| 663 | break; |
| 664 | } |
| 665 | catch ( final MissingImplementationException e ) |
| 666 | { |
| 667 | if ( exception == null ) |
| 668 | { |
| 669 | exception = e; |
| 670 | } |
| 671 | } |
| 672 | } |
| 673 | while ( ( clazz = clazz.getSuperclass() ) != null ); |
| 674 | |
| 675 | if ( implementation == null ) |
| 676 | { |
| 677 | throw exception; |
| 678 | } |
| 679 | |
| 680 | return implementation; |
| 681 | } |
| 682 | |
| 683 | private Instance getInstance( final Object object, |
| 684 | final Implementation impl ) |
| 685 | { |
| 686 | synchronized ( this.objects ) |
| 687 | { |
| 688 | Instance instance = (Instance) this.objects.get( object ); |
| 689 | |
| 690 | if ( instance == null ) |
| 691 | { |
| 692 | instance = |
| 693 | new Instance( this.getClassLoader( object.getClass() ), |
| 694 | Specification.SCOPE_MULTITON, |
| 695 | impl.getIdentifier(), |
| 696 | impl.getModelVersion(), |
| 697 | impl.getModuleName() ); |
| 698 | |
| 699 | instance.setImplementation( impl ); |
| 700 | this.objects.put( object, instance ); |
| 701 | } |
| 702 | |
| 703 | return instance; |
| 704 | } |
| 705 | } |
| 706 | |
| 707 | private Object getDependency( final ClassLoader classLoader, |
| 708 | final Instance instance, |
| 709 | final Dependency dependency ) |
| 710 | throws ClassNotFoundException, NoSuchMethodException, |
| 711 | IllegalAccessException, InvocationTargetException |
| 712 | { |
| 713 | Object dependencyObject = |
| 714 | instance != null |
| 715 | ? instance.getDependencyObject( dependency.getName() ) |
| 716 | : null; |
| 717 | |
| 718 | if ( dependencyObject == null ) |
| 719 | { |
| 720 | if ( dependency.getImplementation() != null ) |
| 721 | { |
| 722 | final Class specClass = |
| 723 | Class.forName( dependency.getSpecification().getIdentifier(), |
| 724 | true, classLoader ); |
| 725 | |
| 726 | final Instance dependencyInstance = new Instance( |
| 727 | classLoader, dependency.getSpecification().getScope(), |
| 728 | dependency.getImplementation().getIdentifier(), |
| 729 | dependency.getImplementation().getModelVersion(), |
| 730 | dependency.getImplementation().getModuleName() ); |
| 731 | |
| 732 | dependencyInstance.setDependency( dependency ); |
| 733 | dependencyObject = this.requestImplementation( |
| 734 | specClass, dependency.getSpecification(), |
| 735 | this.getObject( dependencyInstance ) ); |
| 736 | |
| 737 | } |
| 738 | else |
| 739 | { |
| 740 | dependencyObject = this.resolveDependency( classLoader, |
| 741 | dependency ); |
| 742 | |
| 743 | } |
| 744 | } |
| 745 | |
| 746 | if ( instance != null && dependency.isBound() ) |
| 747 | { |
| 748 | instance.setDependencyObject( dependency.getName(), |
| 749 | dependencyObject ); |
| 750 | |
| 751 | } |
| 752 | |
| 753 | return dependencyObject; |
| 754 | } |
| 755 | |
| 756 | private Object resolveDependency( final ClassLoader classLoader, |
| 757 | final Dependency dependency ) |
| 758 | throws ClassNotFoundException, NoSuchMethodException, |
| 759 | IllegalAccessException, InvocationTargetException |
| 760 | { |
| 761 | Implementation impl; |
| 762 | Instance dependencyInstance; |
| 763 | Dependency clone; |
| 764 | final Object resolved; |
| 765 | |
| 766 | final Class specClass = |
| 767 | Class.forName( dependency.getSpecification().getIdentifier(), |
| 768 | true, classLoader ); |
| 769 | |
| 770 | switch ( dependency.getSpecification().getMultiplicity() ) |
| 771 | { |
| 772 | case Specification.MULTIPLICITY_ONE: |
| 773 | if ( dependency.getSpecification(). |
| 774 | getImplementations().size() != 1 ) |
| 775 | { |
| 776 | throw new MultiplicityConstraintException( |
| 777 | dependency.getSpecification(). |
| 778 | getIdentifier() ); |
| 779 | |
| 780 | } |
| 781 | |
| 782 | impl = dependency.getSpecification().getImplementations(). |
| 783 | getImplementation( 0 ); |
| 784 | |
| 785 | dependencyInstance = new Instance( |
| 786 | classLoader, dependency.getSpecification().getScope(), |
| 787 | impl.getIdentifier(), impl.getModelVersion(), |
| 788 | impl.getModuleName() ); |
| 789 | |
| 790 | clone = (Dependency) dependency.clone(); |
| 791 | clone.setImplementation( impl ); |
| 792 | dependencyInstance.setDependency( clone ); |
| 793 | resolved = this.requestImplementation( specClass, dependency. |
| 794 | getSpecification(), this.getObject( dependencyInstance ) ); |
| 795 | |
| 796 | break; |
| 797 | |
| 798 | case Specification.MULTIPLICITY_MANY: |
| 799 | final List list = new ArrayList( dependency.getSpecification(). |
| 800 | getImplementations().size() ); |
| 801 | |
| 802 | for ( int i = dependency.getSpecification(). |
| 803 | getImplementations().size() - 1; i >= 0; i-- ) |
| 804 | { |
| 805 | impl = dependency.getSpecification().getImplementations(). |
| 806 | getImplementation( i ); |
| 807 | |
| 808 | dependencyInstance = new Instance( |
| 809 | classLoader, dependency.getSpecification().getScope(), |
| 810 | impl.getIdentifier(), impl.getModelVersion(), |
| 811 | impl.getModuleName() ); |
| 812 | |
| 813 | clone = (Dependency) dependency.clone(); |
| 814 | clone.setImplementation( impl ); |
| 815 | dependencyInstance.setDependency( clone ); |
| 816 | list.add( this.requestImplementation( |
| 817 | specClass, dependency.getSpecification(), |
| 818 | this.getObject( dependencyInstance ) ) ); |
| 819 | |
| 820 | } |
| 821 | |
| 822 | final Object[] implementations = |
| 823 | (Object[]) Array.newInstance( specClass, |
| 824 | list.size() ); |
| 825 | |
| 826 | resolved = list.toArray( implementations ); |
| 827 | break; |
| 828 | |
| 829 | default: |
| 830 | throw new AssertionError( Integer.toString( |
| 831 | dependency.getSpecification().getMultiplicity() ) ); |
| 832 | |
| 833 | } |
| 834 | |
| 835 | return resolved; |
| 836 | } |
| 837 | |
| 838 | private Object resolveImplementation( final ClassLoader classLoader, |
| 839 | final Specification spec ) |
| 840 | throws ClassNotFoundException, NoSuchMethodException, |
| 841 | IllegalAccessException, InvocationTargetException |
| 842 | { |
| 843 | Instance instance; |
| 844 | Implementation impl; |
| 845 | |
| 846 | final Object resolved; |
| 847 | final Class specClass = Class.forName( |
| 848 | spec.getIdentifier(), true, classLoader ); |
| 849 | |
| 850 | switch ( spec.getMultiplicity() ) |
| 851 | { |
| 852 | case Specification.MULTIPLICITY_ONE: |
| 853 | if ( spec.getImplementations().size() != 1 ) |
| 854 | { |
| 855 | throw new MultiplicityConstraintException( |
| 856 | spec.getIdentifier() ); |
| 857 | |
| 858 | } |
| 859 | |
| 860 | impl = spec.getImplementations().getImplementation( 0 ); |
| 861 | instance = new Instance( classLoader, |
| 862 | spec.getScope(), |
| 863 | impl.getIdentifier(), |
| 864 | impl.getModelVersion(), |
| 865 | impl.getModuleName() ); |
| 866 | |
| 867 | instance.setImplementation( impl ); |
| 868 | resolved = this.requestImplementation( |
| 869 | specClass, spec, this.getObject( instance ) ); |
| 870 | |
| 871 | break; |
| 872 | |
| 873 | case Specification.MULTIPLICITY_MANY: |
| 874 | final List list = new ArrayList( |
| 875 | spec.getImplementations().size() ); |
| 876 | |
| 877 | for ( int i = spec.getImplementations().size() - 1; i >= 0; |
| 878 | i-- ) |
| 879 | { |
| 880 | impl = spec.getImplementations().getImplementation( i ); |
| 881 | instance = new Instance( classLoader, |
| 882 | spec.getScope(), |
| 883 | impl.getIdentifier(), |
| 884 | impl.getModelVersion(), |
| 885 | impl.getModuleName() ); |
| 886 | |
| 887 | instance.setImplementation( impl ); |
| 888 | list.add( this.requestImplementation( |
| 889 | specClass, spec, this.getObject( instance ) ) ); |
| 890 | |
| 891 | } |
| 892 | |
| 893 | final Object[] implementations = |
| 894 | (Object[]) Array.newInstance( specClass, |
| 895 | list.size() ); |
| 896 | |
| 897 | resolved = list.toArray( implementations ); |
| 898 | break; |
| 899 | |
| 900 | default: |
| 901 | throw new AssertionError( Integer.toString( |
| 902 | spec.getMultiplicity() ) ); |
| 903 | |
| 904 | } |
| 905 | |
| 906 | return resolved; |
| 907 | } |
| 908 | |
| 909 | private Object getScopedObject( final Scope scope, final Instance instance ) |
| 910 | { |
| 911 | Object object; |
| 912 | |
| 913 | if ( scope != null ) |
| 914 | { |
| 915 | object = scope.getObject( instance.getClassName() ); |
| 916 | |
| 917 | if ( object == null || object instanceof Instance ) |
| 918 | { |
| 919 | synchronized ( this.cycle ) |
| 920 | { |
| 921 | object = scope.getObject( instance.getClassName() ); |
| 922 | |
| 923 | if ( object == null ) |
| 924 | { |
| 925 | scope.putObject( instance.getClassName(), instance ); |
| 926 | |
| 927 | try |
| 928 | { |
| 929 | object = this.instantiateObject( instance ); |
| 930 | } |
| 931 | catch ( final Throwable t ) |
| 932 | { |
| 933 | scope.removeObject( instance.getClassName() ); |
| 934 | if ( t instanceof Error ) |
| 935 | { |
| 936 | throw (Error) t; |
| 937 | } |
| 938 | else if ( t instanceof RuntimeException ) |
| 939 | { |
| 940 | throw (RuntimeException) t; |
| 941 | } |
| 942 | else |
| 943 | { |
| 944 | throw new org.jdtaus.core.container.InstantiationException( |
| 945 | instance.getClassName(), t ); |
| 946 | |
| 947 | } |
| 948 | } |
| 949 | |
| 950 | scope.putObject( instance.getClassName(), object ); |
| 951 | } |
| 952 | else if ( object instanceof Instance ) |
| 953 | { |
| 954 | throw new DependencyCycleException( |
| 955 | ( (Instance) object ).getClassName(), |
| 956 | instance.getClassName() ); |
| 957 | |
| 958 | } |
| 959 | } |
| 960 | } |
| 961 | } |
| 962 | else |
| 963 | { |
| 964 | object = this.instantiateObject( instance ); |
| 965 | } |
| 966 | |
| 967 | return object; |
| 968 | } |
| 969 | |
| 970 | private ClassLoader getClassLoader( final Class clazz ) |
| 971 | { |
| 972 | ClassLoader classLoader = clazz.getClassLoader(); |
| 973 | if ( classLoader == null ) |
| 974 | { |
| 975 | classLoader = ClassLoader.getSystemClassLoader(); |
| 976 | } |
| 977 | |
| 978 | return classLoader; |
| 979 | } |
| 980 | |
| 981 | private Object requestImplementation( final Class specClass, |
| 982 | final Specification spec, |
| 983 | final Object object ) |
| 984 | throws NoSuchMethodException, IllegalAccessException, |
| 985 | InvocationTargetException |
| 986 | { |
| 987 | Object resolved = object; |
| 988 | Method accessor = null; |
| 989 | |
| 990 | try |
| 991 | { |
| 992 | if ( !specClass.isAssignableFrom( object.getClass() ) ) |
| 993 | { |
| 994 | accessor = object.getClass().getDeclaredMethod( |
| 995 | spec.getIdentifier().replace( '.', '_' ), EMPTY ); |
| 996 | |
| 997 | accessor.setAccessible( true ); |
| 998 | resolved = accessor.invoke( object, EMPTY ); |
| 999 | } |
| 1000 | |
| 1001 | return resolved; |
| 1002 | } |
| 1003 | finally |
| 1004 | { |
| 1005 | if ( accessor != null ) |
| 1006 | { |
| 1007 | accessor.setAccessible( false ); |
| 1008 | } |
| 1009 | } |
| 1010 | } |
| 1011 | |
| 1012 | //--------------------------------------------------------DefaultContainer-- |
| 1013 | } |