author | malenkov |
Wed, 07 May 2008 23:20:32 +0400 | |
changeset 466 | 6acd5ec503a8 |
parent 2 | 90ce3da70b43 |
child 3241 | 6fd229e009e7 |
permissions | -rw-r--r-- |
2 | 1 |
/* |
466
6acd5ec503a8
4935607: RFE: LTP: Should be possible to set the TRANSIENT attribute of propertiies to FALSE
malenkov
parents:
2
diff
changeset
|
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* Copyright 1996-2008 Sun Microsystems, Inc. All Rights Reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Sun designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Sun in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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*/ |
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package java.beans; |
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import java.lang.ref.Reference; |
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import java.lang.reflect.Method; |
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import java.lang.reflect.Constructor; |
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33 |
/** |
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* A PropertyDescriptor describes one property that a Java Bean |
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* exports via a pair of accessor methods. |
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*/ |
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public class PropertyDescriptor extends FeatureDescriptor { |
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||
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private Reference<Class> propertyTypeRef; |
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private Reference<Method> readMethodRef; |
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private Reference<Method> writeMethodRef; |
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private Reference<Class> propertyEditorClassRef; |
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43 |
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44 |
private boolean bound; |
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private boolean constrained; |
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// The base name of the method name which will be prefixed with the |
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// read and write method. If name == "foo" then the baseName is "Foo" |
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private String baseName; |
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50 |
||
51 |
private String writeMethodName; |
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private String readMethodName; |
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||
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/** |
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* Constructs a PropertyDescriptor for a property that follows |
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* the standard Java convention by having getFoo and setFoo |
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* accessor methods. Thus if the argument name is "fred", it will |
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* assume that the writer method is "setFred" and the reader method |
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* is "getFred" (or "isFred" for a boolean property). Note that the |
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* property name should start with a lower case character, which will |
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* be capitalized in the method names. |
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* |
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* @param propertyName The programmatic name of the property. |
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* @param beanClass The Class object for the target bean. For |
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65 |
* example sun.beans.OurButton.class. |
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* @exception IntrospectionException if an exception occurs during |
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* introspection. |
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*/ |
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69 |
public PropertyDescriptor(String propertyName, Class<?> beanClass) |
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70 |
throws IntrospectionException { |
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this(propertyName, beanClass, |
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Introspector.IS_PREFIX + NameGenerator.capitalize(propertyName), |
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Introspector.SET_PREFIX + NameGenerator.capitalize(propertyName)); |
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} |
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/** |
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* This constructor takes the name of a simple property, and method |
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* names for reading and writing the property. |
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* |
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* @param propertyName The programmatic name of the property. |
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* @param beanClass The Class object for the target bean. For |
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* example sun.beans.OurButton.class. |
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* @param readMethodName The name of the method used for reading the property |
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* value. May be null if the property is write-only. |
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* @param writeMethodName The name of the method used for writing the property |
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* value. May be null if the property is read-only. |
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* @exception IntrospectionException if an exception occurs during |
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* introspection. |
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*/ |
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public PropertyDescriptor(String propertyName, Class<?> beanClass, |
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String readMethodName, String writeMethodName) |
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throws IntrospectionException { |
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if (beanClass == null) { |
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throw new IntrospectionException("Target Bean class is null"); |
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} |
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96 |
if (propertyName == null || propertyName.length() == 0) { |
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97 |
throw new IntrospectionException("bad property name"); |
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} |
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if ("".equals(readMethodName) || "".equals(writeMethodName)) { |
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throw new IntrospectionException("read or write method name should not be the empty string"); |
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} |
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setName(propertyName); |
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setClass0(beanClass); |
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105 |
this.readMethodName = readMethodName; |
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if (readMethodName != null && getReadMethod() == null) { |
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throw new IntrospectionException("Method not found: " + readMethodName); |
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} |
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this.writeMethodName = writeMethodName; |
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110 |
if (writeMethodName != null && getWriteMethod() == null) { |
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throw new IntrospectionException("Method not found: " + writeMethodName); |
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} |
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// If this class or one of its base classes allow PropertyChangeListener, |
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114 |
// then we assume that any properties we discover are "bound". |
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115 |
// See Introspector.getTargetPropertyInfo() method. |
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116 |
String name = "addPropertyChangeListener"; |
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117 |
Class[] args = {PropertyChangeListener.class}; |
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118 |
this.bound = (null != Introspector.findMethod(beanClass, name, args.length, args)); |
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} |
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120 |
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121 |
/** |
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122 |
* This constructor takes the name of a simple property, and Method |
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* objects for reading and writing the property. |
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* |
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125 |
* @param propertyName The programmatic name of the property. |
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* @param readMethod The method used for reading the property value. |
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* May be null if the property is write-only. |
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* @param writeMethod The method used for writing the property value. |
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* May be null if the property is read-only. |
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* @exception IntrospectionException if an exception occurs during |
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131 |
* introspection. |
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*/ |
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133 |
public PropertyDescriptor(String propertyName, Method readMethod, Method writeMethod) |
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134 |
throws IntrospectionException { |
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135 |
if (propertyName == null || propertyName.length() == 0) { |
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136 |
throw new IntrospectionException("bad property name"); |
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137 |
} |
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setName(propertyName); |
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setReadMethod(readMethod); |
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140 |
setWriteMethod(writeMethod); |
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} |
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143 |
/** |
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144 |
* Creates <code>PropertyDescriptor</code> for the specified bean |
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* with the specified name and methods to read/write the property value. |
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* |
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* @param bean the type of the target bean |
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148 |
* @param base the base name of the property (the rest of the method name) |
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149 |
* @param read the method used for reading the property value |
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* @param write the method used for writing the property value |
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* @exception IntrospectionException if an exception occurs during introspection |
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* |
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153 |
* @since 1.7 |
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154 |
*/ |
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155 |
PropertyDescriptor(Class<?> bean, String base, Method read, Method write) throws IntrospectionException { |
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156 |
if (bean == null) { |
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157 |
throw new IntrospectionException("Target Bean class is null"); |
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158 |
} |
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setClass0(bean); |
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160 |
setName(Introspector.decapitalize(base)); |
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setReadMethod(read); |
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setWriteMethod(write); |
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this.baseName = base; |
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} |
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/** |
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* Gets the Class object for the property. |
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* |
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* @return The Java type info for the property. Note that |
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* the "Class" object may describe a built-in Java type such as "int". |
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* The result may be "null" if this is an indexed property that |
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* does not support non-indexed access. |
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* <p> |
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* This is the type that will be returned by the ReadMethod. |
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*/ |
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176 |
public synchronized Class<?> getPropertyType() { |
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177 |
Class type = getPropertyType0(); |
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178 |
if (type == null) { |
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179 |
try { |
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180 |
type = findPropertyType(getReadMethod(), getWriteMethod()); |
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181 |
setPropertyType(type); |
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182 |
} catch (IntrospectionException ex) { |
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183 |
// Fall |
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184 |
} |
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185 |
} |
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186 |
return type; |
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187 |
} |
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188 |
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189 |
private void setPropertyType(Class type) { |
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190 |
this.propertyTypeRef = getWeakReference(type); |
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191 |
} |
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192 |
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193 |
private Class getPropertyType0() { |
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194 |
return (this.propertyTypeRef != null) |
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195 |
? this.propertyTypeRef.get() |
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196 |
: null; |
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197 |
} |
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199 |
/** |
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* Gets the method that should be used to read the property value. |
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* |
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* @return The method that should be used to read the property value. |
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* May return null if the property can't be read. |
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*/ |
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public synchronized Method getReadMethod() { |
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Method readMethod = getReadMethod0(); |
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207 |
if (readMethod == null) { |
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208 |
Class cls = getClass0(); |
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209 |
if (cls == null || (readMethodName == null && readMethodRef == null)) { |
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210 |
// The read method was explicitly set to null. |
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return null; |
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212 |
} |
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213 |
if (readMethodName == null) { |
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214 |
Class type = getPropertyType0(); |
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215 |
if (type == boolean.class || type == null) { |
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216 |
readMethodName = Introspector.IS_PREFIX + getBaseName(); |
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217 |
} else { |
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readMethodName = Introspector.GET_PREFIX + getBaseName(); |
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} |
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} |
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221 |
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222 |
// Since there can be multiple write methods but only one getter |
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// method, find the getter method first so that you know what the |
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// property type is. For booleans, there can be "is" and "get" |
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// methods. If an "is" method exists, this is the official |
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// reader method so look for this one first. |
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readMethod = Introspector.findMethod(cls, readMethodName, 0); |
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if (readMethod == null) { |
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readMethodName = Introspector.GET_PREFIX + getBaseName(); |
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readMethod = Introspector.findMethod(cls, readMethodName, 0); |
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} |
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232 |
try { |
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233 |
setReadMethod(readMethod); |
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234 |
} catch (IntrospectionException ex) { |
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// fall |
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236 |
} |
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237 |
} |
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238 |
return readMethod; |
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} |
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240 |
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241 |
/** |
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242 |
* Sets the method that should be used to read the property value. |
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243 |
* |
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244 |
* @param readMethod The new read method. |
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245 |
*/ |
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246 |
public synchronized void setReadMethod(Method readMethod) |
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247 |
throws IntrospectionException { |
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248 |
if (readMethod == null) { |
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249 |
readMethodName = null; |
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250 |
readMethodRef = null; |
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251 |
return; |
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252 |
} |
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253 |
// The property type is determined by the read method. |
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254 |
setPropertyType(findPropertyType(readMethod, getWriteMethod0())); |
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255 |
setClass0(readMethod.getDeclaringClass()); |
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256 |
||
257 |
readMethodName = readMethod.getName(); |
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258 |
this.readMethodRef = getSoftReference(readMethod); |
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466
6acd5ec503a8
4935607: RFE: LTP: Should be possible to set the TRANSIENT attribute of propertiies to FALSE
malenkov
parents:
2
diff
changeset
|
259 |
setTransient(readMethod.getAnnotation(Transient.class)); |
2 | 260 |
} |
261 |
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262 |
/** |
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263 |
* Gets the method that should be used to write the property value. |
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264 |
* |
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265 |
* @return The method that should be used to write the property value. |
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266 |
* May return null if the property can't be written. |
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267 |
*/ |
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268 |
public synchronized Method getWriteMethod() { |
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269 |
Method writeMethod = getWriteMethod0(); |
|
270 |
if (writeMethod == null) { |
|
271 |
Class cls = getClass0(); |
|
272 |
if (cls == null || (writeMethodName == null && writeMethodRef == null)) { |
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273 |
// The write method was explicitly set to null. |
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274 |
return null; |
|
275 |
} |
|
276 |
||
277 |
// We need the type to fetch the correct method. |
|
278 |
Class type = getPropertyType0(); |
|
279 |
if (type == null) { |
|
280 |
try { |
|
281 |
// Can't use getPropertyType since it will lead to recursive loop. |
|
282 |
type = findPropertyType(getReadMethod(), null); |
|
283 |
setPropertyType(type); |
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284 |
} catch (IntrospectionException ex) { |
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285 |
// Without the correct property type we can't be guaranteed |
|
286 |
// to find the correct method. |
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287 |
return null; |
|
288 |
} |
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289 |
} |
|
290 |
||
291 |
if (writeMethodName == null) { |
|
292 |
writeMethodName = Introspector.SET_PREFIX + getBaseName(); |
|
293 |
} |
|
294 |
||
295 |
writeMethod = Introspector.findMethod(cls, writeMethodName, 1, |
|
296 |
(type == null) ? null : new Class[] { type }); |
|
297 |
try { |
|
298 |
setWriteMethod(writeMethod); |
|
299 |
} catch (IntrospectionException ex) { |
|
300 |
// fall through |
|
301 |
} |
|
302 |
} |
|
303 |
return writeMethod; |
|
304 |
} |
|
305 |
||
306 |
/** |
|
307 |
* Sets the method that should be used to write the property value. |
|
308 |
* |
|
309 |
* @param writeMethod The new write method. |
|
310 |
*/ |
|
311 |
public synchronized void setWriteMethod(Method writeMethod) |
|
312 |
throws IntrospectionException { |
|
313 |
if (writeMethod == null) { |
|
314 |
writeMethodName = null; |
|
315 |
writeMethodRef = null; |
|
316 |
return; |
|
317 |
} |
|
318 |
// Set the property type - which validates the method |
|
319 |
setPropertyType(findPropertyType(getReadMethod(), writeMethod)); |
|
320 |
setClass0(writeMethod.getDeclaringClass()); |
|
321 |
||
322 |
writeMethodName = writeMethod.getName(); |
|
323 |
this.writeMethodRef = getSoftReference(writeMethod); |
|
466
6acd5ec503a8
4935607: RFE: LTP: Should be possible to set the TRANSIENT attribute of propertiies to FALSE
malenkov
parents:
2
diff
changeset
|
324 |
setTransient(writeMethod.getAnnotation(Transient.class)); |
2 | 325 |
} |
326 |
||
327 |
private Method getReadMethod0() { |
|
328 |
return (this.readMethodRef != null) |
|
329 |
? this.readMethodRef.get() |
|
330 |
: null; |
|
331 |
} |
|
332 |
||
333 |
private Method getWriteMethod0() { |
|
334 |
return (this.writeMethodRef != null) |
|
335 |
? this.writeMethodRef.get() |
|
336 |
: null; |
|
337 |
} |
|
338 |
||
339 |
/** |
|
340 |
* Overridden to ensure that a super class doesn't take precedent |
|
341 |
*/ |
|
342 |
void setClass0(Class clz) { |
|
343 |
if (getClass0() != null && clz.isAssignableFrom(getClass0())) { |
|
344 |
// dont replace a subclass with a superclass |
|
345 |
return; |
|
346 |
} |
|
347 |
super.setClass0(clz); |
|
348 |
} |
|
349 |
||
350 |
/** |
|
351 |
* Updates to "bound" properties will cause a "PropertyChange" event to |
|
352 |
* get fired when the property is changed. |
|
353 |
* |
|
354 |
* @return True if this is a bound property. |
|
355 |
*/ |
|
356 |
public boolean isBound() { |
|
357 |
return bound; |
|
358 |
} |
|
359 |
||
360 |
/** |
|
361 |
* Updates to "bound" properties will cause a "PropertyChange" event to |
|
362 |
* get fired when the property is changed. |
|
363 |
* |
|
364 |
* @param bound True if this is a bound property. |
|
365 |
*/ |
|
366 |
public void setBound(boolean bound) { |
|
367 |
this.bound = bound; |
|
368 |
} |
|
369 |
||
370 |
/** |
|
371 |
* Attempted updates to "Constrained" properties will cause a "VetoableChange" |
|
372 |
* event to get fired when the property is changed. |
|
373 |
* |
|
374 |
* @return True if this is a constrained property. |
|
375 |
*/ |
|
376 |
public boolean isConstrained() { |
|
377 |
return constrained; |
|
378 |
} |
|
379 |
||
380 |
/** |
|
381 |
* Attempted updates to "Constrained" properties will cause a "VetoableChange" |
|
382 |
* event to get fired when the property is changed. |
|
383 |
* |
|
384 |
* @param constrained True if this is a constrained property. |
|
385 |
*/ |
|
386 |
public void setConstrained(boolean constrained) { |
|
387 |
this.constrained = constrained; |
|
388 |
} |
|
389 |
||
390 |
||
391 |
/** |
|
392 |
* Normally PropertyEditors will be found using the PropertyEditorManager. |
|
393 |
* However if for some reason you want to associate a particular |
|
394 |
* PropertyEditor with a given property, then you can do it with |
|
395 |
* this method. |
|
396 |
* |
|
397 |
* @param propertyEditorClass The Class for the desired PropertyEditor. |
|
398 |
*/ |
|
399 |
public void setPropertyEditorClass(Class<?> propertyEditorClass) { |
|
400 |
this.propertyEditorClassRef = getWeakReference((Class)propertyEditorClass); |
|
401 |
} |
|
402 |
||
403 |
/** |
|
404 |
* Gets any explicit PropertyEditor Class that has been registered |
|
405 |
* for this property. |
|
406 |
* |
|
407 |
* @return Any explicit PropertyEditor Class that has been registered |
|
408 |
* for this property. Normally this will return "null", |
|
409 |
* indicating that no special editor has been registered, |
|
410 |
* so the PropertyEditorManager should be used to locate |
|
411 |
* a suitable PropertyEditor. |
|
412 |
*/ |
|
413 |
public Class<?> getPropertyEditorClass() { |
|
414 |
return (this.propertyEditorClassRef != null) |
|
415 |
? this.propertyEditorClassRef.get() |
|
416 |
: null; |
|
417 |
} |
|
418 |
||
419 |
/** |
|
420 |
* Constructs an instance of a property editor using the current |
|
421 |
* property editor class. |
|
422 |
* <p> |
|
423 |
* If the property editor class has a public constructor that takes an |
|
424 |
* Object argument then it will be invoked using the bean parameter |
|
425 |
* as the argument. Otherwise, the default constructor will be invoked. |
|
426 |
* |
|
427 |
* @param bean the source object |
|
428 |
* @return a property editor instance or null if a property editor has |
|
429 |
* not been defined or cannot be created |
|
430 |
* @since 1.5 |
|
431 |
*/ |
|
432 |
public PropertyEditor createPropertyEditor(Object bean) { |
|
433 |
Object editor = null; |
|
434 |
||
435 |
Class cls = getPropertyEditorClass(); |
|
436 |
if (cls != null) { |
|
437 |
Constructor ctor = null; |
|
438 |
if (bean != null) { |
|
439 |
try { |
|
440 |
ctor = cls.getConstructor(new Class[] { Object.class }); |
|
441 |
} catch (Exception ex) { |
|
442 |
// Fall through |
|
443 |
} |
|
444 |
} |
|
445 |
try { |
|
446 |
if (ctor == null) { |
|
447 |
editor = cls.newInstance(); |
|
448 |
} else { |
|
449 |
editor = ctor.newInstance(new Object[] { bean }); |
|
450 |
} |
|
451 |
} catch (Exception ex) { |
|
452 |
// A serious error has occured. |
|
453 |
// Proably due to an invalid property editor. |
|
454 |
throw new RuntimeException("PropertyEditor not instantiated", |
|
455 |
ex); |
|
456 |
} |
|
457 |
} |
|
458 |
return (PropertyEditor)editor; |
|
459 |
} |
|
460 |
||
461 |
||
462 |
/** |
|
463 |
* Compares this <code>PropertyDescriptor</code> against the specified object. |
|
464 |
* Returns true if the objects are the same. Two <code>PropertyDescriptor</code>s |
|
465 |
* are the same if the read, write, property types, property editor and |
|
466 |
* flags are equivalent. |
|
467 |
* |
|
468 |
* @since 1.4 |
|
469 |
*/ |
|
470 |
public boolean equals(Object obj) { |
|
471 |
if (this == obj) { |
|
472 |
return true; |
|
473 |
} |
|
474 |
if (obj != null && obj instanceof PropertyDescriptor) { |
|
475 |
PropertyDescriptor other = (PropertyDescriptor)obj; |
|
476 |
Method otherReadMethod = other.getReadMethod(); |
|
477 |
Method otherWriteMethod = other.getWriteMethod(); |
|
478 |
||
479 |
if (!compareMethods(getReadMethod(), otherReadMethod)) { |
|
480 |
return false; |
|
481 |
} |
|
482 |
||
483 |
if (!compareMethods(getWriteMethod(), otherWriteMethod)) { |
|
484 |
return false; |
|
485 |
} |
|
486 |
||
487 |
if (getPropertyType() == other.getPropertyType() && |
|
488 |
getPropertyEditorClass() == other.getPropertyEditorClass() && |
|
489 |
bound == other.isBound() && constrained == other.isConstrained() && |
|
490 |
writeMethodName == other.writeMethodName && |
|
491 |
readMethodName == other.readMethodName) { |
|
492 |
return true; |
|
493 |
} |
|
494 |
} |
|
495 |
return false; |
|
496 |
} |
|
497 |
||
498 |
/** |
|
499 |
* Package private helper method for Descriptor .equals methods. |
|
500 |
* |
|
501 |
* @param a first method to compare |
|
502 |
* @param b second method to compare |
|
503 |
* @return boolean to indicate that the methods are equivalent |
|
504 |
*/ |
|
505 |
boolean compareMethods(Method a, Method b) { |
|
506 |
// Note: perhaps this should be a protected method in FeatureDescriptor |
|
507 |
if ((a == null) != (b == null)) { |
|
508 |
return false; |
|
509 |
} |
|
510 |
||
511 |
if (a != null && b != null) { |
|
512 |
if (!a.equals(b)) { |
|
513 |
return false; |
|
514 |
} |
|
515 |
} |
|
516 |
return true; |
|
517 |
} |
|
518 |
||
519 |
/** |
|
520 |
* Package-private constructor. |
|
521 |
* Merge two property descriptors. Where they conflict, give the |
|
522 |
* second argument (y) priority over the first argument (x). |
|
523 |
* |
|
524 |
* @param x The first (lower priority) PropertyDescriptor |
|
525 |
* @param y The second (higher priority) PropertyDescriptor |
|
526 |
*/ |
|
527 |
PropertyDescriptor(PropertyDescriptor x, PropertyDescriptor y) { |
|
528 |
super(x,y); |
|
529 |
||
530 |
if (y.baseName != null) { |
|
531 |
baseName = y.baseName; |
|
532 |
} else { |
|
533 |
baseName = x.baseName; |
|
534 |
} |
|
535 |
||
536 |
if (y.readMethodName != null) { |
|
537 |
readMethodName = y.readMethodName; |
|
538 |
} else { |
|
539 |
readMethodName = x.readMethodName; |
|
540 |
} |
|
541 |
||
542 |
if (y.writeMethodName != null) { |
|
543 |
writeMethodName = y.writeMethodName; |
|
544 |
} else { |
|
545 |
writeMethodName = x.writeMethodName; |
|
546 |
} |
|
547 |
||
548 |
if (y.propertyTypeRef != null) { |
|
549 |
propertyTypeRef = y.propertyTypeRef; |
|
550 |
} else { |
|
551 |
propertyTypeRef = x.propertyTypeRef; |
|
552 |
} |
|
553 |
||
554 |
// Figure out the merged read method. |
|
555 |
Method xr = x.getReadMethod(); |
|
556 |
Method yr = y.getReadMethod(); |
|
557 |
||
558 |
// Normally give priority to y's readMethod. |
|
559 |
try { |
|
560 |
if (yr != null && yr.getDeclaringClass() == getClass0()) { |
|
561 |
setReadMethod(yr); |
|
562 |
} else { |
|
563 |
setReadMethod(xr); |
|
564 |
} |
|
565 |
} catch (IntrospectionException ex) { |
|
566 |
// fall through |
|
567 |
} |
|
568 |
||
569 |
// However, if both x and y reference read methods in the same class, |
|
570 |
// give priority to a boolean "is" method over a boolean "get" method. |
|
571 |
if (xr != null && yr != null && |
|
572 |
xr.getDeclaringClass() == yr.getDeclaringClass() && |
|
573 |
getReturnType(getClass0(), xr) == boolean.class && |
|
574 |
getReturnType(getClass0(), yr) == boolean.class && |
|
575 |
xr.getName().indexOf(Introspector.IS_PREFIX) == 0 && |
|
576 |
yr.getName().indexOf(Introspector.GET_PREFIX) == 0) { |
|
577 |
try { |
|
578 |
setReadMethod(xr); |
|
579 |
} catch (IntrospectionException ex) { |
|
580 |
// fall through |
|
581 |
} |
|
582 |
} |
|
583 |
||
584 |
Method xw = x.getWriteMethod(); |
|
585 |
Method yw = y.getWriteMethod(); |
|
586 |
||
587 |
try { |
|
588 |
if (yw != null && yw.getDeclaringClass() == getClass0()) { |
|
589 |
setWriteMethod(yw); |
|
590 |
} else { |
|
591 |
setWriteMethod(xw); |
|
592 |
} |
|
593 |
} catch (IntrospectionException ex) { |
|
594 |
// Fall through |
|
595 |
} |
|
596 |
||
597 |
if (y.getPropertyEditorClass() != null) { |
|
598 |
setPropertyEditorClass(y.getPropertyEditorClass()); |
|
599 |
} else { |
|
600 |
setPropertyEditorClass(x.getPropertyEditorClass()); |
|
601 |
} |
|
602 |
||
603 |
||
604 |
bound = x.bound | y.bound; |
|
605 |
constrained = x.constrained | y.constrained; |
|
606 |
} |
|
607 |
||
608 |
/* |
|
609 |
* Package-private dup constructor. |
|
610 |
* This must isolate the new object from any changes to the old object. |
|
611 |
*/ |
|
612 |
PropertyDescriptor(PropertyDescriptor old) { |
|
613 |
super(old); |
|
614 |
propertyTypeRef = old.propertyTypeRef; |
|
615 |
readMethodRef = old.readMethodRef; |
|
616 |
writeMethodRef = old.writeMethodRef; |
|
617 |
propertyEditorClassRef = old.propertyEditorClassRef; |
|
618 |
||
619 |
writeMethodName = old.writeMethodName; |
|
620 |
readMethodName = old.readMethodName; |
|
621 |
baseName = old.baseName; |
|
622 |
||
623 |
bound = old.bound; |
|
624 |
constrained = old.constrained; |
|
625 |
} |
|
626 |
||
627 |
/** |
|
628 |
* Returns the property type that corresponds to the read and write method. |
|
629 |
* The type precedence is given to the readMethod. |
|
630 |
* |
|
631 |
* @return the type of the property descriptor or null if both |
|
632 |
* read and write methods are null. |
|
633 |
* @throws IntrospectionException if the read or write method is invalid |
|
634 |
*/ |
|
635 |
private Class findPropertyType(Method readMethod, Method writeMethod) |
|
636 |
throws IntrospectionException { |
|
637 |
Class propertyType = null; |
|
638 |
try { |
|
639 |
if (readMethod != null) { |
|
640 |
Class[] params = getParameterTypes(getClass0(), readMethod); |
|
641 |
if (params.length != 0) { |
|
642 |
throw new IntrospectionException("bad read method arg count: " |
|
643 |
+ readMethod); |
|
644 |
} |
|
645 |
propertyType = getReturnType(getClass0(), readMethod); |
|
646 |
if (propertyType == Void.TYPE) { |
|
647 |
throw new IntrospectionException("read method " + |
|
648 |
readMethod.getName() + " returns void"); |
|
649 |
} |
|
650 |
} |
|
651 |
if (writeMethod != null) { |
|
652 |
Class params[] = getParameterTypes(getClass0(), writeMethod); |
|
653 |
if (params.length != 1) { |
|
654 |
throw new IntrospectionException("bad write method arg count: " |
|
655 |
+ writeMethod); |
|
656 |
} |
|
657 |
if (propertyType != null && propertyType != params[0]) { |
|
658 |
throw new IntrospectionException("type mismatch between read and write methods"); |
|
659 |
} |
|
660 |
propertyType = params[0]; |
|
661 |
} |
|
662 |
} catch (IntrospectionException ex) { |
|
663 |
throw ex; |
|
664 |
} |
|
665 |
return propertyType; |
|
666 |
} |
|
667 |
||
668 |
||
669 |
/** |
|
670 |
* Returns a hash code value for the object. |
|
671 |
* See {@link java.lang.Object#hashCode} for a complete description. |
|
672 |
* |
|
673 |
* @return a hash code value for this object. |
|
674 |
* @since 1.5 |
|
675 |
*/ |
|
676 |
public int hashCode() { |
|
677 |
int result = 7; |
|
678 |
||
679 |
result = 37 * result + ((getPropertyType() == null) ? 0 : |
|
680 |
getPropertyType().hashCode()); |
|
681 |
result = 37 * result + ((getReadMethod() == null) ? 0 : |
|
682 |
getReadMethod().hashCode()); |
|
683 |
result = 37 * result + ((getWriteMethod() == null) ? 0 : |
|
684 |
getWriteMethod().hashCode()); |
|
685 |
result = 37 * result + ((getPropertyEditorClass() == null) ? 0 : |
|
686 |
getPropertyEditorClass().hashCode()); |
|
687 |
result = 37 * result + ((writeMethodName == null) ? 0 : |
|
688 |
writeMethodName.hashCode()); |
|
689 |
result = 37 * result + ((readMethodName == null) ? 0 : |
|
690 |
readMethodName.hashCode()); |
|
691 |
result = 37 * result + getName().hashCode(); |
|
692 |
result = 37 * result + ((bound == false) ? 0 : 1); |
|
693 |
result = 37 * result + ((constrained == false) ? 0 : 1); |
|
694 |
||
695 |
return result; |
|
696 |
} |
|
697 |
||
698 |
// Calculate once since capitalize() is expensive. |
|
699 |
String getBaseName() { |
|
700 |
if (baseName == null) { |
|
701 |
baseName = NameGenerator.capitalize(getName()); |
|
702 |
} |
|
703 |
return baseName; |
|
704 |
} |
|
705 |
||
706 |
/* |
|
707 |
public String toString() { |
|
708 |
String message = "name=" + getName(); |
|
709 |
message += ", class=" + getClass0(); |
|
710 |
message += ", type=" + getPropertyType(); |
|
711 |
||
712 |
message += ", writeMethod="; |
|
713 |
message += writeMethodName; |
|
714 |
||
715 |
message += ", readMethod="; |
|
716 |
message += readMethodName; |
|
717 |
||
718 |
message += ", bound=" + bound; |
|
719 |
message += ", constrained=" + constrained; |
|
720 |
||
721 |
return message; |
|
722 |
} |
|
723 |
*/ |
|
724 |
} |