PropertyDescriptor.java revision 11933:be4d1f1a6d53
1/* 2 * Copyright (c) 1996, 2014, 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 */ 25package java.beans; 26 27import java.lang.ref.Reference; 28import java.lang.reflect.Method; 29import java.lang.reflect.Constructor; 30import java.util.Map.Entry; 31 32import com.sun.beans.introspect.PropertyInfo; 33 34/** 35 * A PropertyDescriptor describes one property that a Java Bean 36 * exports via a pair of accessor methods. 37 * @since 1.1 38 */ 39public class PropertyDescriptor extends FeatureDescriptor { 40 41 private Reference<? extends Class<?>> propertyTypeRef; 42 private final MethodRef readMethodRef = new MethodRef(); 43 private final MethodRef writeMethodRef = new MethodRef(); 44 private Reference<? extends Class<?>> propertyEditorClassRef; 45 46 private boolean bound; 47 private boolean constrained; 48 49 // The base name of the method name which will be prefixed with the 50 // read and write method. If name == "foo" then the baseName is "Foo" 51 private String baseName; 52 53 private String writeMethodName; 54 private String readMethodName; 55 56 /** 57 * Constructs a PropertyDescriptor for a property that follows 58 * the standard Java convention by having getFoo and setFoo 59 * accessor methods. Thus if the argument name is "fred", it will 60 * assume that the writer method is "setFred" and the reader method 61 * is "getFred" (or "isFred" for a boolean property). Note that the 62 * property name should start with a lower case character, which will 63 * be capitalized in the method names. 64 * 65 * @param propertyName The programmatic name of the property. 66 * @param beanClass The Class object for the target bean. For 67 * example sun.beans.OurButton.class. 68 * @exception IntrospectionException if an exception occurs during 69 * introspection. 70 */ 71 public PropertyDescriptor(String propertyName, Class<?> beanClass) 72 throws IntrospectionException { 73 this(propertyName, beanClass, 74 Introspector.IS_PREFIX + NameGenerator.capitalize(propertyName), 75 Introspector.SET_PREFIX + NameGenerator.capitalize(propertyName)); 76 } 77 78 /** 79 * This constructor takes the name of a simple property, and method 80 * names for reading and writing the property. 81 * 82 * @param propertyName The programmatic name of the property. 83 * @param beanClass The Class object for the target bean. For 84 * example sun.beans.OurButton.class. 85 * @param readMethodName The name of the method used for reading the property 86 * value. May be null if the property is write-only. 87 * @param writeMethodName The name of the method used for writing the property 88 * value. May be null if the property is read-only. 89 * @exception IntrospectionException if an exception occurs during 90 * introspection. 91 */ 92 public PropertyDescriptor(String propertyName, Class<?> beanClass, 93 String readMethodName, String writeMethodName) 94 throws IntrospectionException { 95 if (beanClass == null) { 96 throw new IntrospectionException("Target Bean class is null"); 97 } 98 if (propertyName == null || propertyName.length() == 0) { 99 throw new IntrospectionException("bad property name"); 100 } 101 if ("".equals(readMethodName) || "".equals(writeMethodName)) { 102 throw new IntrospectionException("read or write method name should not be the empty string"); 103 } 104 setName(propertyName); 105 setClass0(beanClass); 106 107 this.readMethodName = readMethodName; 108 if (readMethodName != null && getReadMethod() == null) { 109 throw new IntrospectionException("Method not found: " + readMethodName); 110 } 111 this.writeMethodName = writeMethodName; 112 if (writeMethodName != null && getWriteMethod() == null) { 113 throw new IntrospectionException("Method not found: " + writeMethodName); 114 } 115 // If this class or one of its base classes allow PropertyChangeListener, 116 // then we assume that any properties we discover are "bound". 117 // See Introspector.getTargetPropertyInfo() method. 118 Class<?>[] args = { PropertyChangeListener.class }; 119 this.bound = null != Introspector.findMethod(beanClass, "addPropertyChangeListener", args.length, args); 120 } 121 122 /** 123 * This constructor takes the name of a simple property, and Method 124 * objects for reading and writing the property. 125 * 126 * @param propertyName The programmatic name of the property. 127 * @param readMethod The method used for reading the property value. 128 * May be null if the property is write-only. 129 * @param writeMethod The method used for writing the property value. 130 * May be null if the property is read-only. 131 * @exception IntrospectionException if an exception occurs during 132 * introspection. 133 */ 134 public PropertyDescriptor(String propertyName, Method readMethod, Method writeMethod) 135 throws IntrospectionException { 136 if (propertyName == null || propertyName.length() == 0) { 137 throw new IntrospectionException("bad property name"); 138 } 139 setName(propertyName); 140 setReadMethod(readMethod); 141 setWriteMethod(writeMethod); 142 } 143 144 /** 145 * Creates {@code PropertyDescriptor} from the specified property info. 146 * 147 * @param entry the pair of values, 148 * where the {@code key} is the base name of the property (the rest of the method name) 149 * and the {@code value} is the automatically generated property info 150 * @param bound the flag indicating whether it is possible to treat this property as a bound property 151 * 152 * @since 1.9 153 */ 154 PropertyDescriptor(Entry<String,PropertyInfo> entry, boolean bound) { 155 String base = entry.getKey(); 156 PropertyInfo info = entry.getValue(); 157 setName(Introspector.decapitalize(base)); 158 setReadMethod0(info.getReadMethod()); 159 setWriteMethod0(info.getWriteMethod()); 160 setPropertyType(info.getPropertyType()); 161 setConstrained(info.isConstrained()); 162 setBound(bound && info.is(PropertyInfo.Name.bound)); 163 if (info.is(PropertyInfo.Name.expert)) { 164 setValue(PropertyInfo.Name.expert.name(), Boolean.TRUE); // compatibility 165 setExpert(true); 166 } 167 if (info.is(PropertyInfo.Name.hidden)) { 168 setValue(PropertyInfo.Name.hidden.name(), Boolean.TRUE); // compatibility 169 setHidden(true); 170 } 171 if (info.is(PropertyInfo.Name.preferred)) { 172 setPreferred(true); 173 } 174 Object visual = info.get(PropertyInfo.Name.visualUpdate); 175 if (visual != null) { 176 setValue(PropertyInfo.Name.visualUpdate.name(), visual); 177 } 178 Object description = info.get(PropertyInfo.Name.description); 179 if (description != null) { 180 setShortDescription(description.toString()); 181 } 182 Object values = info.get(PropertyInfo.Name.enumerationValues); 183 if (values != null) { 184 setValue(PropertyInfo.Name.enumerationValues.name(), values); 185 } 186 this.baseName = base; 187 } 188 189 /** 190 * Returns the Java type info for the property. 191 * Note that the {@code Class} object may describe 192 * primitive Java types such as {@code int}. 193 * This type is returned by the read method 194 * or is used as the parameter type of the write method. 195 * Returns {@code null} if the type is an indexed property 196 * that does not support non-indexed access. 197 * 198 * @return the {@code Class} object that represents the Java type info, 199 * or {@code null} if the type cannot be determined 200 */ 201 public synchronized Class<?> getPropertyType() { 202 Class<?> type = getPropertyType0(); 203 if (type == null) { 204 try { 205 type = findPropertyType(getReadMethod(), getWriteMethod()); 206 setPropertyType(type); 207 } catch (IntrospectionException ex) { 208 // Fall 209 } 210 } 211 return type; 212 } 213 214 private void setPropertyType(Class<?> type) { 215 this.propertyTypeRef = getWeakReference(type); 216 } 217 218 private Class<?> getPropertyType0() { 219 return (this.propertyTypeRef != null) 220 ? this.propertyTypeRef.get() 221 : null; 222 } 223 224 /** 225 * Gets the method that should be used to read the property value. 226 * 227 * @return The method that should be used to read the property value. 228 * May return null if the property can't be read. 229 */ 230 public synchronized Method getReadMethod() { 231 Method readMethod = this.readMethodRef.get(); 232 if (readMethod == null) { 233 Class<?> cls = getClass0(); 234 if (cls == null || (readMethodName == null && !this.readMethodRef.isSet())) { 235 // The read method was explicitly set to null. 236 return null; 237 } 238 String nextMethodName = Introspector.GET_PREFIX + getBaseName(); 239 if (readMethodName == null) { 240 Class<?> type = getPropertyType0(); 241 if (type == boolean.class || type == null) { 242 readMethodName = Introspector.IS_PREFIX + getBaseName(); 243 } else { 244 readMethodName = nextMethodName; 245 } 246 } 247 248 // Since there can be multiple write methods but only one getter 249 // method, find the getter method first so that you know what the 250 // property type is. For booleans, there can be "is" and "get" 251 // methods. If an "is" method exists, this is the official 252 // reader method so look for this one first. 253 readMethod = Introspector.findMethod(cls, readMethodName, 0); 254 if ((readMethod == null) && !readMethodName.equals(nextMethodName)) { 255 readMethodName = nextMethodName; 256 readMethod = Introspector.findMethod(cls, readMethodName, 0); 257 } 258 try { 259 setReadMethod(readMethod); 260 } catch (IntrospectionException ex) { 261 // fall 262 } 263 } 264 return readMethod; 265 } 266 267 /** 268 * Sets the method that should be used to read the property value. 269 * 270 * @param readMethod The new read method. 271 * @throws IntrospectionException if the read method is invalid 272 * @since 1.2 273 */ 274 public synchronized void setReadMethod(Method readMethod) 275 throws IntrospectionException { 276 // The property type is determined by the read method. 277 setPropertyType(findPropertyType(readMethod, this.writeMethodRef.get())); 278 setReadMethod0(readMethod); 279 } 280 281 private void setReadMethod0(Method readMethod) { 282 this.readMethodRef.set(readMethod); 283 if (readMethod == null) { 284 readMethodName = null; 285 return; 286 } 287 setClass0(readMethod.getDeclaringClass()); 288 289 readMethodName = readMethod.getName(); 290 setTransient(readMethod.getAnnotation(Transient.class)); 291 } 292 293 /** 294 * Gets the method that should be used to write the property value. 295 * 296 * @return The method that should be used to write the property value. 297 * May return null if the property can't be written. 298 */ 299 public synchronized Method getWriteMethod() { 300 Method writeMethod = this.writeMethodRef.get(); 301 if (writeMethod == null) { 302 Class<?> cls = getClass0(); 303 if (cls == null || (writeMethodName == null && !this.writeMethodRef.isSet())) { 304 // The write method was explicitly set to null. 305 return null; 306 } 307 308 // We need the type to fetch the correct method. 309 Class<?> type = getPropertyType0(); 310 if (type == null) { 311 try { 312 // Can't use getPropertyType since it will lead to recursive loop. 313 type = findPropertyType(getReadMethod(), null); 314 setPropertyType(type); 315 } catch (IntrospectionException ex) { 316 // Without the correct property type we can't be guaranteed 317 // to find the correct method. 318 return null; 319 } 320 } 321 322 if (writeMethodName == null) { 323 writeMethodName = Introspector.SET_PREFIX + getBaseName(); 324 } 325 326 Class<?>[] args = (type == null) ? null : new Class<?>[] { type }; 327 writeMethod = Introspector.findMethod(cls, writeMethodName, 1, args); 328 if (writeMethod != null) { 329 if (!writeMethod.getReturnType().equals(void.class)) { 330 writeMethod = null; 331 } 332 } 333 try { 334 setWriteMethod(writeMethod); 335 } catch (IntrospectionException ex) { 336 // fall through 337 } 338 } 339 return writeMethod; 340 } 341 342 /** 343 * Sets the method that should be used to write the property value. 344 * 345 * @param writeMethod The new write method. 346 * @throws IntrospectionException if the write method is invalid 347 * @since 1.2 348 */ 349 public synchronized void setWriteMethod(Method writeMethod) 350 throws IntrospectionException { 351 // Set the property type - which validates the method 352 setPropertyType(findPropertyType(getReadMethod(), writeMethod)); 353 setWriteMethod0(writeMethod); 354 } 355 356 private void setWriteMethod0(Method writeMethod) { 357 this.writeMethodRef.set(writeMethod); 358 if (writeMethod == null) { 359 writeMethodName = null; 360 return; 361 } 362 setClass0(writeMethod.getDeclaringClass()); 363 364 writeMethodName = writeMethod.getName(); 365 setTransient(writeMethod.getAnnotation(Transient.class)); 366 } 367 368 /** 369 * Overridden to ensure that a super class doesn't take precedent 370 */ 371 void setClass0(Class<?> clz) { 372 if (getClass0() != null && clz.isAssignableFrom(getClass0())) { 373 // don't replace a subclass with a superclass 374 return; 375 } 376 super.setClass0(clz); 377 } 378 379 /** 380 * Updates to "bound" properties will cause a "PropertyChange" event to 381 * get fired when the property is changed. 382 * 383 * @return True if this is a bound property. 384 */ 385 public boolean isBound() { 386 return bound; 387 } 388 389 /** 390 * Updates to "bound" properties will cause a "PropertyChange" event to 391 * get fired when the property is changed. 392 * 393 * @param bound True if this is a bound property. 394 */ 395 public void setBound(boolean bound) { 396 this.bound = bound; 397 } 398 399 /** 400 * Attempted updates to "Constrained" properties will cause a "VetoableChange" 401 * event to get fired when the property is changed. 402 * 403 * @return True if this is a constrained property. 404 */ 405 public boolean isConstrained() { 406 return constrained; 407 } 408 409 /** 410 * Attempted updates to "Constrained" properties will cause a "VetoableChange" 411 * event to get fired when the property is changed. 412 * 413 * @param constrained True if this is a constrained property. 414 */ 415 public void setConstrained(boolean constrained) { 416 this.constrained = constrained; 417 } 418 419 420 /** 421 * Normally PropertyEditors will be found using the PropertyEditorManager. 422 * However if for some reason you want to associate a particular 423 * PropertyEditor with a given property, then you can do it with 424 * this method. 425 * 426 * @param propertyEditorClass The Class for the desired PropertyEditor. 427 */ 428 public void setPropertyEditorClass(Class<?> propertyEditorClass) { 429 this.propertyEditorClassRef = getWeakReference(propertyEditorClass); 430 } 431 432 /** 433 * Gets any explicit PropertyEditor Class that has been registered 434 * for this property. 435 * 436 * @return Any explicit PropertyEditor Class that has been registered 437 * for this property. Normally this will return "null", 438 * indicating that no special editor has been registered, 439 * so the PropertyEditorManager should be used to locate 440 * a suitable PropertyEditor. 441 */ 442 public Class<?> getPropertyEditorClass() { 443 return (this.propertyEditorClassRef != null) 444 ? this.propertyEditorClassRef.get() 445 : null; 446 } 447 448 /** 449 * Constructs an instance of a property editor using the current 450 * property editor class. 451 * <p> 452 * If the property editor class has a public constructor that takes an 453 * Object argument then it will be invoked using the bean parameter 454 * as the argument. Otherwise, the default constructor will be invoked. 455 * 456 * @param bean the source object 457 * @return a property editor instance or null if a property editor has 458 * not been defined or cannot be created 459 * @since 1.5 460 */ 461 public PropertyEditor createPropertyEditor(Object bean) { 462 Object editor = null; 463 464 Class<?> cls = getPropertyEditorClass(); 465 if (cls != null) { 466 Constructor<?> ctor = null; 467 if (bean != null) { 468 try { 469 ctor = cls.getConstructor(new Class<?>[] { Object.class }); 470 } catch (Exception ex) { 471 // Fall through 472 } 473 } 474 try { 475 if (ctor == null) { 476 editor = cls.newInstance(); 477 } else { 478 editor = ctor.newInstance(new Object[] { bean }); 479 } 480 } catch (Exception ex) { 481 // Fall through 482 } 483 } 484 return (PropertyEditor)editor; 485 } 486 487 488 /** 489 * Compares this <code>PropertyDescriptor</code> against the specified object. 490 * Returns true if the objects are the same. Two <code>PropertyDescriptor</code>s 491 * are the same if the read, write, property types, property editor and 492 * flags are equivalent. 493 * 494 * @since 1.4 495 */ 496 public boolean equals(Object obj) { 497 if (this == obj) { 498 return true; 499 } 500 if (obj != null && obj instanceof PropertyDescriptor) { 501 PropertyDescriptor other = (PropertyDescriptor)obj; 502 Method otherReadMethod = other.getReadMethod(); 503 Method otherWriteMethod = other.getWriteMethod(); 504 505 if (!compareMethods(getReadMethod(), otherReadMethod)) { 506 return false; 507 } 508 509 if (!compareMethods(getWriteMethod(), otherWriteMethod)) { 510 return false; 511 } 512 513 if (getPropertyType() == other.getPropertyType() && 514 getPropertyEditorClass() == other.getPropertyEditorClass() && 515 bound == other.isBound() && constrained == other.isConstrained() && 516 writeMethodName == other.writeMethodName && 517 readMethodName == other.readMethodName) { 518 return true; 519 } 520 } 521 return false; 522 } 523 524 /** 525 * Package private helper method for Descriptor .equals methods. 526 * 527 * @param a first method to compare 528 * @param b second method to compare 529 * @return boolean to indicate that the methods are equivalent 530 */ 531 boolean compareMethods(Method a, Method b) { 532 // Note: perhaps this should be a protected method in FeatureDescriptor 533 if ((a == null) != (b == null)) { 534 return false; 535 } 536 537 if (a != null && b != null) { 538 if (!a.equals(b)) { 539 return false; 540 } 541 } 542 return true; 543 } 544 545 /** 546 * Package-private constructor. 547 * Merge two property descriptors. Where they conflict, give the 548 * second argument (y) priority over the first argument (x). 549 * 550 * @param x The first (lower priority) PropertyDescriptor 551 * @param y The second (higher priority) PropertyDescriptor 552 */ 553 PropertyDescriptor(PropertyDescriptor x, PropertyDescriptor y) { 554 super(x,y); 555 556 if (y.baseName != null) { 557 baseName = y.baseName; 558 } else { 559 baseName = x.baseName; 560 } 561 562 if (y.readMethodName != null) { 563 readMethodName = y.readMethodName; 564 } else { 565 readMethodName = x.readMethodName; 566 } 567 568 if (y.writeMethodName != null) { 569 writeMethodName = y.writeMethodName; 570 } else { 571 writeMethodName = x.writeMethodName; 572 } 573 574 if (y.propertyTypeRef != null) { 575 propertyTypeRef = y.propertyTypeRef; 576 } else { 577 propertyTypeRef = x.propertyTypeRef; 578 } 579 580 // Figure out the merged read method. 581 Method xr = x.getReadMethod(); 582 Method yr = y.getReadMethod(); 583 584 // Normally give priority to y's readMethod. 585 try { 586 if (isAssignable(xr, yr)) { 587 setReadMethod(yr); 588 } else { 589 setReadMethod(xr); 590 } 591 } catch (IntrospectionException ex) { 592 // fall through 593 } 594 595 // However, if both x and y reference read methods in the same class, 596 // give priority to a boolean "is" method over a boolean "get" method. 597 if (xr != null && yr != null && 598 xr.getDeclaringClass() == yr.getDeclaringClass() && 599 getReturnType(getClass0(), xr) == boolean.class && 600 getReturnType(getClass0(), yr) == boolean.class && 601 xr.getName().indexOf(Introspector.IS_PREFIX) == 0 && 602 yr.getName().indexOf(Introspector.GET_PREFIX) == 0) { 603 try { 604 setReadMethod(xr); 605 } catch (IntrospectionException ex) { 606 // fall through 607 } 608 } 609 610 Method xw = x.getWriteMethod(); 611 Method yw = y.getWriteMethod(); 612 613 try { 614 if (yw != null) { 615 setWriteMethod(yw); 616 } else { 617 setWriteMethod(xw); 618 } 619 } catch (IntrospectionException ex) { 620 // Fall through 621 } 622 623 if (y.getPropertyEditorClass() != null) { 624 setPropertyEditorClass(y.getPropertyEditorClass()); 625 } else { 626 setPropertyEditorClass(x.getPropertyEditorClass()); 627 } 628 629 630 bound = x.bound | y.bound; 631 constrained = x.constrained | y.constrained; 632 } 633 634 /* 635 * Package-private dup constructor. 636 * This must isolate the new object from any changes to the old object. 637 */ 638 PropertyDescriptor(PropertyDescriptor old) { 639 super(old); 640 propertyTypeRef = old.propertyTypeRef; 641 this.readMethodRef.set(old.readMethodRef.get()); 642 this.writeMethodRef.set(old.writeMethodRef.get()); 643 propertyEditorClassRef = old.propertyEditorClassRef; 644 645 writeMethodName = old.writeMethodName; 646 readMethodName = old.readMethodName; 647 baseName = old.baseName; 648 649 bound = old.bound; 650 constrained = old.constrained; 651 } 652 653 void updateGenericsFor(Class<?> type) { 654 setClass0(type); 655 try { 656 setPropertyType(findPropertyType(this.readMethodRef.get(), this.writeMethodRef.get())); 657 } 658 catch (IntrospectionException exception) { 659 setPropertyType(null); 660 } 661 } 662 663 /** 664 * Returns the property type that corresponds to the read and write method. 665 * The type precedence is given to the readMethod. 666 * 667 * @return the type of the property descriptor or null if both 668 * read and write methods are null. 669 * @throws IntrospectionException if the read or write method is invalid 670 */ 671 private Class<?> findPropertyType(Method readMethod, Method writeMethod) 672 throws IntrospectionException { 673 Class<?> propertyType = null; 674 try { 675 if (readMethod != null) { 676 Class<?>[] params = getParameterTypes(getClass0(), readMethod); 677 if (params.length != 0) { 678 throw new IntrospectionException("bad read method arg count: " 679 + readMethod); 680 } 681 propertyType = getReturnType(getClass0(), readMethod); 682 if (propertyType == Void.TYPE) { 683 throw new IntrospectionException("read method " + 684 readMethod.getName() + " returns void"); 685 } 686 } 687 if (writeMethod != null) { 688 Class<?>[] params = getParameterTypes(getClass0(), writeMethod); 689 if (params.length != 1) { 690 throw new IntrospectionException("bad write method arg count: " 691 + writeMethod); 692 } 693 if (propertyType != null && !params[0].isAssignableFrom(propertyType)) { 694 throw new IntrospectionException("type mismatch between read and write methods"); 695 } 696 propertyType = params[0]; 697 } 698 } catch (IntrospectionException ex) { 699 throw ex; 700 } 701 return propertyType; 702 } 703 704 705 /** 706 * Returns a hash code value for the object. 707 * See {@link java.lang.Object#hashCode} for a complete description. 708 * 709 * @return a hash code value for this object. 710 * @since 1.5 711 */ 712 public int hashCode() { 713 int result = 7; 714 715 result = 37 * result + ((getPropertyType() == null) ? 0 : 716 getPropertyType().hashCode()); 717 result = 37 * result + ((getReadMethod() == null) ? 0 : 718 getReadMethod().hashCode()); 719 result = 37 * result + ((getWriteMethod() == null) ? 0 : 720 getWriteMethod().hashCode()); 721 result = 37 * result + ((getPropertyEditorClass() == null) ? 0 : 722 getPropertyEditorClass().hashCode()); 723 result = 37 * result + ((writeMethodName == null) ? 0 : 724 writeMethodName.hashCode()); 725 result = 37 * result + ((readMethodName == null) ? 0 : 726 readMethodName.hashCode()); 727 result = 37 * result + getName().hashCode(); 728 result = 37 * result + ((bound == false) ? 0 : 1); 729 result = 37 * result + ((constrained == false) ? 0 : 1); 730 731 return result; 732 } 733 734 // Calculate once since capitalize() is expensive. 735 String getBaseName() { 736 if (baseName == null) { 737 baseName = NameGenerator.capitalize(getName()); 738 } 739 return baseName; 740 } 741 742 void appendTo(StringBuilder sb) { 743 appendTo(sb, "bound", this.bound); 744 appendTo(sb, "constrained", this.constrained); 745 appendTo(sb, "propertyEditorClass", this.propertyEditorClassRef); 746 appendTo(sb, "propertyType", this.propertyTypeRef); 747 appendTo(sb, "readMethod", this.readMethodRef.get()); 748 appendTo(sb, "writeMethod", this.writeMethodRef.get()); 749 } 750 751 boolean isAssignable(Method m1, Method m2) { 752 if (m1 == null) { 753 return true; // choose second method 754 } 755 if (m2 == null) { 756 return false; // choose first method 757 } 758 if (!m1.getName().equals(m2.getName())) { 759 return true; // choose second method by default 760 } 761 Class<?> type1 = m1.getDeclaringClass(); 762 Class<?> type2 = m2.getDeclaringClass(); 763 if (!type1.isAssignableFrom(type2)) { 764 return false; // choose first method: it declared later 765 } 766 type1 = getReturnType(getClass0(), m1); 767 type2 = getReturnType(getClass0(), m2); 768 if (!type1.isAssignableFrom(type2)) { 769 return false; // choose first method: it overrides return type 770 } 771 Class<?>[] args1 = getParameterTypes(getClass0(), m1); 772 Class<?>[] args2 = getParameterTypes(getClass0(), m2); 773 if (args1.length != args2.length) { 774 return true; // choose second method by default 775 } 776 for (int i = 0; i < args1.length; i++) { 777 if (!args1[i].isAssignableFrom(args2[i])) { 778 return false; // choose first method: it overrides parameter 779 } 780 } 781 return true; // choose second method 782 } 783} 784