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PropertyEditorRegistrySupport (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.beans
Class PropertyEditorRegistrySupport

java.lang.Object
  org.springframework.beans.PropertyEditorRegistrySupport

All Implemented Interfaces:

PropertyEditorRegistry

Direct Known Subclasses:

AbstractPropertyAccessor, SimpleTypeConverter

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public class PropertyEditorRegistrySupport
extends Object
implements PropertyEditorRegistry

Base implementation of the PropertyEditorRegistry interface. Provides management of default editors and custom editors. Mainly serves as base class for BeanWrapperImpl.

Since:

1.2.6

Author:

Juergen Hoeller, Rob Harrop

See Also:

PropertyEditorManager, PropertyEditorSupport.setAsText(java.lang.String), PropertyEditorSupport.setValue(java.lang.Object)

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Constructor Summary
PropertyEditorRegistrySupport()

 

Method Summary
protected  void	copyCustomEditorsTo(PropertyEditorRegistry target, String nestedProperty)           Copy the custom editors registered in this instance to the given target registry.
protected  void	copyDefaultEditorsTo(PropertyEditorRegistrySupport target)           Copy the default editors registered in this instance to the given target registry.
PropertyEditor	findCustomEditor(Class requiredType, String propertyPath)           Find a custom property editor for the given type and property.
protected  PropertyEditor	getDefaultEditor(Class requiredType)           Retrieve the default editor for the given property type, if any.
protected  Class	getPropertyType(String propertyPath)           Determine the property type for the given property path.
protected  Class	guessPropertyTypeFromEditors(String propertyName)           Guess the property type of the specified property from the registered custom editors (provided that they were registered for a specific type).
boolean	hasCustomEditorForElement(Class elementType, String propertyPath)           Determine whether this registry contains a custom editor for the specified array/collection element.
boolean	isSharedEditor(PropertyEditor propertyEditor)           Check whether the given editor instance is a shared editor, that is, whether the given editor instance might be used concurrently.
void	registerCustomEditor(Class requiredType, PropertyEditor propertyEditor)           Register the given custom property editor for all properties of the given type.
void	registerCustomEditor(Class requiredType, String propertyPath, PropertyEditor propertyEditor)           Register the given custom property editor for the given type and property, or for all properties of the given type.
protected  void	registerDefaultEditors()           Activate the default editors for this registry instance, allowing for lazily registering default editors when needed.
void	registerSharedEditor(Class requiredType, PropertyEditor propertyEditor)           Register the given custom property editor for all properties of the given type, indicating that the given instance is a shared editor that might be used concurrently.
void	useConfigValueEditors()           Activate config value editors which are only intended for configuration purposes, such as StringArrayPropertyEditor.

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

PropertyEditorRegistrySupport

public PropertyEditorRegistrySupport()

Method Detail

registerDefaultEditors

protected void registerDefaultEditors()

Activate the default editors for this registry instance, allowing for lazily registering default editors when needed.

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useConfigValueEditors

public void useConfigValueEditors()

Activate config value editors which are only intended for configuration purposes, such as StringArrayPropertyEditor.

Those editors are not registered by default simply because they are in general inappropriate for data binding purposes. Of course, you may register them individually in any case, through registerCustomEditor(java.lang.Class, java.beans.PropertyEditor).

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getDefaultEditor

protected PropertyEditor getDefaultEditor(Class requiredType)

Retrieve the default editor for the given property type, if any.

Lazily registers the default editors, if they are active.

Parameters:

requiredType - type of the property

Returns:

the default editor, or null if none found

See Also:

registerDefaultEditors()

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copyDefaultEditorsTo

protected void copyDefaultEditorsTo(PropertyEditorRegistrySupport target)

Copy the default editors registered in this instance to the given target registry.

Parameters:

target - the target registry to copy to

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registerCustomEditor

public void registerCustomEditor(Class requiredType,
                                 PropertyEditor propertyEditor)

Description copied from interface: PropertyEditorRegistry

Register the given custom property editor for all properties of the given type.

Specified by:

registerCustomEditor in interface PropertyEditorRegistry

Parameters:

requiredType - the type of the property

propertyEditor - the editor to register

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registerCustomEditor

public void registerCustomEditor(Class requiredType,
                                 String propertyPath,
                                 PropertyEditor propertyEditor)

Description copied from interface: PropertyEditorRegistry

Register the given custom property editor for the given type and property, or for all properties of the given type.

If the property path denotes an array or Collection property, the editor will get applied either to the array/Collection itself (the PropertyEditor has to create an array or Collection value) or to each element (the PropertyEditor has to create the element type), depending on the specified required type.

Note: Only one single registered custom editor per property path is supported. In the case of a Collection/array, do not register an editor for both the Collection/array and each element on the same property.

For example, if you wanted to register an editor for "items[n].quantity" (for all values n), you would use "items.quality" as the value of the 'propertyPath' argument to this method.

Specified by:

registerCustomEditor in interface PropertyEditorRegistry

Parameters:

requiredType - the type of the property (can be null if a property is given but should be specified in any case for consistency checking)

propertyPath - the path of the property (name or nested path), or null if registering an editor for all properties of the given type

propertyEditor - editor to register

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registerSharedEditor

public void registerSharedEditor(Class requiredType,
                                 PropertyEditor propertyEditor)

Register the given custom property editor for all properties of the given type, indicating that the given instance is a shared editor that might be used concurrently.

Parameters:

requiredType - the type of the property

propertyEditor - the shared editor to register

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isSharedEditor

public boolean isSharedEditor(PropertyEditor propertyEditor)

Check whether the given editor instance is a shared editor, that is, whether the given editor instance might be used concurrently.

Parameters:

propertyEditor - the editor instance to check

Returns:

whether the editor is a shared instance

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findCustomEditor

public PropertyEditor findCustomEditor(Class requiredType,
                                       String propertyPath)

Description copied from interface: PropertyEditorRegistry

Find a custom property editor for the given type and property.

Specified by:

findCustomEditor in interface PropertyEditorRegistry

Parameters:

requiredType - the type of the property (can be null if a property is given but should be specified in any case for consistency checking)

propertyPath - the path of the property (name or nested path), or null if looking for an editor for all properties of the given type

Returns:

the registered editor, or null if none

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hasCustomEditorForElement

public boolean hasCustomEditorForElement(Class elementType,
                                         String propertyPath)

Determine whether this registry contains a custom editor for the specified array/collection element.

Parameters:

elementType - the target type of the element (can be null if not known)

propertyPath - the property path (typically of the array/collection; can be null if not known)

Returns:

whether a matching custom editor has been found

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getPropertyType

protected Class getPropertyType(String propertyPath)

Determine the property type for the given property path.

Called by findCustomEditor(java.lang.Class, java.lang.String) if no required type has been specified, to be able to find a type-specific editor even if just given a property path.

The default implementation always returns null. BeanWrapperImpl overrides this with the standard getPropertyType method as defined by the BeanWrapper interface.

Parameters:

propertyPath - the property path to determine the type for

Returns:

the type of the property, or null if not determinable

See Also:

PropertyAccessor.getPropertyType(String)

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guessPropertyTypeFromEditors

protected Class guessPropertyTypeFromEditors(String propertyName)

Guess the property type of the specified property from the registered custom editors (provided that they were registered for a specific type).

Parameters:

propertyName - the name of the property

Returns:

the property type, or null if not determinable

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copyCustomEditorsTo

protected void copyCustomEditorsTo(PropertyEditorRegistry target,
                                   String nestedProperty)

Copy the custom editors registered in this instance to the given target registry.

Parameters:

target - the target registry to copy to

nestedProperty - the nested property path of the target registry, if any. If this is non-null, only editors registered for a path below this nested property will be copied.

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