Interface BeanWrapper

All Superinterfaces:
ConfigurablePropertyAccessor, PropertyAccessor, PropertyEditorRegistry, TypeConverter
All Known Implementing Classes:
BeanWrapperImpl

public interface BeanWrapper extends ConfigurablePropertyAccessor
The central interface of Spring's low-level JavaBeans infrastructure.

Typically not used directly but rather implicitly via a BeanFactory or a DataBinder.

Provides operations to analyze and manipulate standard JavaBeans: the ability to get and set property values (individually or in bulk), get property descriptors, and query the readability/writability of properties.

This interface supports nested properties enabling the setting of properties on subproperties to an unlimited depth.

A BeanWrapper's default for the "extractOldValueForEditor" setting is "false", to avoid side effects caused by getter method invocations. Turn this to "true" to expose present property values to custom editors.

Since:
13 April 2001
Author:
Rod Johnson, Juergen Hoeller
See Also:
  • Method Details

    • setAutoGrowCollectionLimit

      void setAutoGrowCollectionLimit(int autoGrowCollectionLimit)
      Specify a limit for array and collection auto-growing.

      Default is unlimited on a plain BeanWrapper.

      Since:
      4.1
    • getAutoGrowCollectionLimit

      int getAutoGrowCollectionLimit()
      Return the limit for array and collection auto-growing.
      Since:
      4.1
    • getWrappedInstance

      Object getWrappedInstance()
      Return the bean instance wrapped by this object.
    • getWrappedClass

      Class<?> getWrappedClass()
      Return the type of the wrapped bean instance.
    • getPropertyDescriptors

      PropertyDescriptor[] getPropertyDescriptors()
      Obtain the PropertyDescriptors for the wrapped object (as determined by standard JavaBeans introspection).
      Returns:
      the PropertyDescriptors for the wrapped object
    • getPropertyDescriptor

      PropertyDescriptor getPropertyDescriptor(String propertyName) throws InvalidPropertyException
      Obtain the property descriptor for a specific property of the wrapped object.
      Parameters:
      propertyName - the property to obtain the descriptor for (may be a nested path, but no indexed/mapped property)
      Returns:
      the property descriptor for the specified property
      Throws:
      InvalidPropertyException - if there is no such property