Package org.springframework.beans

Class BeanWrapperImpl

java.lang.Object

org.springframework.beans.PropertyEditorRegistrySupport

org.springframework.beans.TypeConverterSupport

org.springframework.beans.AbstractPropertyAccessor

org.springframework.beans.AbstractNestablePropertyAccessor

org.springframework.beans.BeanWrapperImpl

All Implemented Interfaces:

BeanWrapper, ConfigurablePropertyAccessor, PropertyAccessor, PropertyEditorRegistry, TypeConverter

public class BeanWrapperImpl
extends AbstractNestablePropertyAccessor
implements BeanWrapper

Default BeanWrapper implementation that should be sufficient for all typical use cases. Caches introspection results for efficiency.

Note: Auto-registers default property editors from the org.springframework.beans.propertyeditors package, which apply in addition to the JDK's standard PropertyEditors. Applications can call the PropertyEditorRegistrySupport.registerCustomEditor(Class, java.beans.PropertyEditor) method to register an editor for a particular instance (i.e. they are not shared across the application). See the base class PropertyEditorRegistrySupport for details.

NOTE: As of Spring 2.5, this is - for almost all purposes - an internal class. It is just public in order to allow for access from other framework packages. For standard application access purposes, use the PropertyAccessorFactory.forBeanPropertyAccess(java.lang.Object) factory method instead.

Since:

15 April 2001

Author:

Rod Johnson, Juergen Hoeller, Rob Harrop, Stephane Nicoll

See Also:

• PropertyEditorRegistrySupport.registerCustomEditor(java.lang.Class<?>, java.beans.PropertyEditor)
• AbstractPropertyAccessor.setPropertyValues(java.util.Map<?, ?>)
• AbstractNestablePropertyAccessor.setPropertyValue(java.lang.String, java.lang.Object)
• AbstractNestablePropertyAccessor.getPropertyValue(java.lang.String)
• AbstractNestablePropertyAccessor.getPropertyType(java.lang.String)
• BeanWrapper
• PropertyEditorRegistrySupport

Nested Class Summary

Nested classes/interfaces inherited from class org.springframework.beans.AbstractNestablePropertyAccessor

AbstractNestablePropertyAccessor.PropertyHandler, AbstractNestablePropertyAccessor.PropertyTokenHolder

Field Summary

Fields inherited from interface org.springframework.beans.PropertyAccessor

NESTED_PROPERTY_SEPARATOR, NESTED_PROPERTY_SEPARATOR_CHAR, PROPERTY_KEY_PREFIX, PROPERTY_KEY_PREFIX_CHAR, PROPERTY_KEY_SUFFIX, PROPERTY_KEY_SUFFIX_CHAR

Constructor Summary

Constructors

Constructor	Description
BeanWrapperImpl()	Create a new empty BeanWrapperImpl.
BeanWrapperImpl(boolean registerDefaultEditors)	Create a new empty BeanWrapperImpl.
BeanWrapperImpl(Class<?> clazz)	Create a new BeanWrapperImpl, wrapping a new instance of the specified class.
BeanWrapperImpl(Object object)	Create a new BeanWrapperImpl for the given object.
BeanWrapperImpl(Object object, String nestedPath, Object rootObject)	Create a new BeanWrapperImpl for the given object, registering a nested path that the object is in.

Method Summary

Modifier and Type	Method	Description
Object	convertForProperty(Object value, String propertyName)	Convert the given value for the specified property to the latter's type.
protected NotWritablePropertyException	createNotWritablePropertyException(String propertyName)	Create a NotWritablePropertyException for the specified property.
protected org.springframework.beans.BeanWrapperImpl.BeanPropertyHandler	getLocalPropertyHandler(String propertyName)	Return a AbstractNestablePropertyAccessor.PropertyHandler for the specified local propertyName.
PropertyDescriptor	getPropertyDescriptor(String propertyName)	Obtain the property descriptor for a specific property of the wrapped object.
PropertyDescriptor[]	getPropertyDescriptors()	Obtain the PropertyDescriptors for the wrapped object (as determined by standard JavaBeans introspection).
protected BeanWrapperImpl	newNestedPropertyAccessor(Object object, String nestedPath)	Create a new nested property accessor instance.
void	setBeanInstance(Object object)	Set a bean instance to hold, without any unwrapping of Optional.
protected void	setIntrospectionClass(Class<?> clazz)	Set the class to introspect.
void	setWrappedInstance(Object object, String nestedPath, Object rootObject)	Switch the target object, replacing the cached introspection results only if the class of the new object is different to that of the replaced object.

Methods inherited from class org.springframework.beans.AbstractNestablePropertyAccessor

convertForProperty, getAutoGrowCollectionLimit, getFinalPath, getNestedPath, getPropertyAccessorForPropertyPath, getPropertyHandler, getPropertyType, getPropertyTypeDescriptor, getPropertyValue, getPropertyValue, getRootClass, getRootInstance, getWrappedClass, getWrappedInstance, isReadableProperty, isWritableProperty, setAutoGrowCollectionLimit, setPropertyValue, setPropertyValue, setPropertyValue, setWrappedInstance, toString

Methods inherited from class org.springframework.beans.AbstractPropertyAccessor

isAutoGrowNestedPaths, isExtractOldValueForEditor, setAutoGrowNestedPaths, setExtractOldValueForEditor, setPropertyValues, setPropertyValues, setPropertyValues, setPropertyValues

Methods inherited from class org.springframework.beans.TypeConverterSupport

convertIfNecessary, convertIfNecessary, convertIfNecessary, convertIfNecessary

Methods inherited from class org.springframework.beans.PropertyEditorRegistrySupport

copyCustomEditorsTo, copyDefaultEditorsTo, findCustomEditor, getConversionService, getDefaultEditor, guessPropertyTypeFromEditors, hasCustomEditorForElement, overrideDefaultEditor, registerCustomEditor, registerCustomEditor, registerDefaultEditors, setConversionService, setDefaultEditorRegistrar, useConfigValueEditors

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.springframework.beans.BeanWrapper

getAutoGrowCollectionLimit, getWrappedClass, getWrappedInstance, setAutoGrowCollectionLimit

Methods inherited from interface org.springframework.beans.ConfigurablePropertyAccessor

getConversionService, isAutoGrowNestedPaths, isExtractOldValueForEditor, setAutoGrowNestedPaths, setConversionService, setExtractOldValueForEditor

Methods inherited from interface org.springframework.beans.PropertyAccessor

getPropertyType, getPropertyTypeDescriptor, getPropertyValue, isReadableProperty, isWritableProperty, setPropertyValue, setPropertyValue, setPropertyValues, setPropertyValues, setPropertyValues, setPropertyValues

Methods inherited from interface org.springframework.beans.PropertyEditorRegistry

findCustomEditor, registerCustomEditor, registerCustomEditor

Methods inherited from interface org.springframework.beans.TypeConverter

convertIfNecessary, convertIfNecessary, convertIfNecessary, convertIfNecessary

Constructor Details

BeanWrapperImpl

public BeanWrapperImpl()

Create a new empty BeanWrapperImpl. Wrapped instance needs to be set afterwards. Registers default editors.

See Also:

• setWrappedInstance(java.lang.Object, java.lang.String, java.lang.Object)

BeanWrapperImpl

public BeanWrapperImpl(boolean registerDefaultEditors)

Create a new empty BeanWrapperImpl. Wrapped instance needs to be set afterwards.

Parameters:

registerDefaultEditors - whether to register default editors (can be suppressed if the BeanWrapper won't need any type conversion)

See Also:

• setWrappedInstance(java.lang.Object, java.lang.String, java.lang.Object)

BeanWrapperImpl

public BeanWrapperImpl(Object object)

Create a new BeanWrapperImpl for the given object.

Parameters:

object - the object wrapped by this BeanWrapper

BeanWrapperImpl

public BeanWrapperImpl(Class<?> clazz)

Create a new BeanWrapperImpl, wrapping a new instance of the specified class.

Parameters:

clazz - class to instantiate and wrap

BeanWrapperImpl

public BeanWrapperImpl(Object object,
 String nestedPath,
 Object rootObject)

Create a new BeanWrapperImpl for the given object, registering a nested path that the object is in.

Parameters:

object - the object wrapped by this BeanWrapper

nestedPath - the nested path of the object

rootObject - the root object at the top of the path

Method Details

setBeanInstance

public void setBeanInstance(Object object)

Set a bean instance to hold, without any unwrapping of Optional.

Parameters:

object - the actual target object

Since:

4.3

See Also:

• AbstractNestablePropertyAccessor.setWrappedInstance(Object)

setWrappedInstance

public void setWrappedInstance(Object object,
 @Nullable
 String nestedPath,
 @Nullable
 Object rootObject)

Description copied from class: AbstractNestablePropertyAccessor

Switch the target object, replacing the cached introspection results only if the class of the new object is different to that of the replaced object.

Overrides:

setWrappedInstance in class AbstractNestablePropertyAccessor

Parameters:

object - the new target object

nestedPath - the nested path of the object

rootObject - the root object at the top of the path

setIntrospectionClass

protected void setIntrospectionClass(Class<?> clazz)

Set the class to introspect. Needs to be called when the target object changes.

Parameters:

clazz - the class to introspect

convertForProperty

@Nullable
public Object convertForProperty(@Nullable
 Object value,
 String propertyName)
                          throws TypeMismatchException

Convert the given value for the specified property to the latter's type.

This method is only intended for optimizations in a BeanFactory. Use the convertIfNecessary methods for programmatic conversion.

Parameters:

value - the value to convert

propertyName - the target property (note that nested or indexed properties are not supported here)

Returns:

the new value, possibly the result of type conversion

Throws:

TypeMismatchException - if type conversion failed

getLocalPropertyHandler

@Nullable
protected org.springframework.beans.BeanWrapperImpl.BeanPropertyHandler getLocalPropertyHandler(String propertyName)

Description copied from class: AbstractNestablePropertyAccessor

Return a AbstractNestablePropertyAccessor.PropertyHandler for the specified local propertyName. Only used to reach a property available in the current context.

Specified by:

getLocalPropertyHandler in class AbstractNestablePropertyAccessor

Parameters:

propertyName - the name of a local property

Returns:

the handler for that property, or null if it has not been found

newNestedPropertyAccessor

protected BeanWrapperImpl newNestedPropertyAccessor(Object object,
 String nestedPath)

Description copied from class: AbstractNestablePropertyAccessor

Create a new nested property accessor instance. Can be overridden in subclasses to create a PropertyAccessor subclass.

Specified by:

newNestedPropertyAccessor in class AbstractNestablePropertyAccessor

Parameters:

object - the object wrapped by this PropertyAccessor

nestedPath - the nested path of the object

Returns:

the nested PropertyAccessor instance

createNotWritablePropertyException

protected NotWritablePropertyException createNotWritablePropertyException(String propertyName)

Description copied from class: AbstractNestablePropertyAccessor

Create a NotWritablePropertyException for the specified property.

Specified by:

createNotWritablePropertyException in class AbstractNestablePropertyAccessor

getPropertyDescriptors

public PropertyDescriptor[] getPropertyDescriptors()

Description copied from interface: BeanWrapper

Obtain the PropertyDescriptors for the wrapped object (as determined by standard JavaBeans introspection).

Specified by:

getPropertyDescriptors in interface BeanWrapper

Returns:

the PropertyDescriptors for the wrapped object

getPropertyDescriptor

public PropertyDescriptor getPropertyDescriptor(String propertyName)
                                         throws InvalidPropertyException

Description copied from interface: BeanWrapper

Obtain the property descriptor for a specific property of the wrapped object.

Specified by:

getPropertyDescriptor in interface BeanWrapper

Parameters:

propertyName - the property to obtain the descriptor for (may be a nested path, but not an indexed/mapped property)

Returns:

the property descriptor for the specified property

Throws:

InvalidPropertyException - if there is no such property