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See:
          Description
| Interface Summary | |
|---|---|
| BeanMetadataElement | Interface to be implemented by bean metadata elements that carry a configuration source object. | 
| BeanWrapper | The central interface of Spring's low-level JavaBeans infrastructure. | 
| ConfigurablePropertyAccessor | Interface that encapsulates configuration methods for a PropertyAccessor. | 
| Mergeable | Interface representing an object whose value set can be merged with that of a parent object. | 
| PropertyAccessor | Common interface for classes that can access named properties
 (such as bean properties of an object or fields in an object)
 Serves as base interface for BeanWrapper. | 
| PropertyEditorRegistrar | Interface for strategies that register custom property editorswith aproperty editor registry. | 
| PropertyEditorRegistry | Encapsulates methods for registering JavaBeans PropertyEditors. | 
| PropertyValues | Holder containing one or more PropertyValueobjects,
 typically comprising one update for a specific target bean. | 
| TypeConverter | Interface that defines type conversion methods. | 
| Class Summary | |
|---|---|
| AbstractPropertyAccessor | Abstract implementation of the PropertyAccessorinterface. | 
| BeanMetadataAttribute | Holder for a key-value style attribute that is part of a bean definition. | 
| BeanMetadataAttributeAccessor | Extension of AttributeAccessorSupport,
 holding attributes asBeanMetadataAttributeobjects in order
 to keep track of the definition source. | 
| BeanUtils | Static convenience methods for JavaBeans: for instantiating beans, checking bean property types, copying bean properties, etc. | 
| BeanWrapperImpl | Default BeanWrapperimplementation that should be sufficient
 for all typical use cases. | 
| CachedIntrospectionResults | Internal class that caches JavaBeans PropertyDescriptorinformation for a Java class. | 
| DirectFieldAccessor | PropertyAccessorimplementation that directly accesses instance fields. | 
| MutablePropertyValues | Default implementation of the PropertyValuesinterface. | 
| PropertyAccessorFactory | Simple factory facade for obtaining PropertyAccessorinstances,
 in particular forBeanWrapperinstances. | 
| PropertyAccessorUtils | Utility methods for classes that perform bean property access
 according to the PropertyAccessorinterface. | 
| PropertyEditorRegistrySupport | Base implementation of the PropertyEditorRegistryinterface. | 
| PropertyValue | Object to hold information and value for an individual bean property. | 
| PropertyValuesEditor | Editorfor aPropertyValuesobject. | 
| SimpleTypeConverter | Simple implementation of the TypeConverter interface that does not operate on any specific target object. | 
| Exception Summary | |
|---|---|
| BeanInstantiationException | Exception thrown when instantiation of a bean failed. | 
| BeansException | Abstract superclass for all exceptions thrown in the beans package and subpackages. | 
| FatalBeanException | Thrown on an unrecoverable problem encountered in the beans packages or sub-packages, e.g. bad class or field. | 
| InvalidPropertyException | Exception thrown when referring to an invalid bean property. | 
| MethodInvocationException | Thrown when a bean property getter or setter method throws an exception, analogous to an InvocationTargetException. | 
| NotReadablePropertyException | Exception thrown on an attempt to get the value of a property that isn't readable, because there's no getter method. | 
| NotWritablePropertyException | Exception thrown on an attempt to set the value of a property that is not writable (typically because there is no setter method). | 
| NullValueInNestedPathException | Exception thrown when navigation of a valid nested property path encounters a NullPointerException. | 
| PropertyAccessException | Superclass for exceptions related to a property access, such as type mismatch or invocation target exception. | 
| PropertyBatchUpdateException | Combined exception, composed of individual PropertyAccessException instances. | 
| TypeMismatchException | Exception thrown on a type mismatch when trying to set a bean property. | 
This package contains interfaces and classes for manipulating Java beans. It is used by most other Spring packages.
A BeanWrapper object may be used to set and get bean properties, singly or in bulk.
The classes in this package are discussed in Chapter 11 of Expert One-On-One J2EE Design and Development by Rod Johnson (Wrox, 2002).
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