org.springframework.beans
Interface PropertyAccessor

All Known Subinterfaces:

BeanWrapper, ConfigurablePropertyAccessor

All Known Implementing Classes:

AbstractPropertyAccessor, BeanWrapperImpl, DirectFieldAccessor

public interface PropertyAccessor

Common interface for classes that can access bean properties. Serves as base interface for BeanWrapper.

Since:

1.1

Author:

Juergen Hoeller

See Also:

BeanWrapper

Field Summary

static String	NESTED_PROPERTY_SEPARATOR Path separator for nested properties.
static char	NESTED_PROPERTY_SEPARATOR_CHAR
static String	PROPERTY_KEY_PREFIX Marker that indicates the start of a property key for an indexed or mapped property like "person.addresses[0]".
static char	PROPERTY_KEY_PREFIX_CHAR
static String	PROPERTY_KEY_SUFFIX Marker that indicates the end of a property key for an indexed or mapped property like "person.addresses[0]".
static char	PROPERTY_KEY_SUFFIX_CHAR

Method Summary

Class	getPropertyType(String propertyName) Determine the property type for a particular property, either checking the property descriptor or checking the value in case of an indexed or mapped element.
Object	getPropertyValue(String propertyName) Get the value of a property.
boolean	isReadableProperty(String propertyName) Return whether this property is readable.
boolean	isWritableProperty(String propertyName) Return whether this property is writable.
void	setPropertyValue(PropertyValue pv) Set a property value.
void	setPropertyValue(String propertyName, Object value) Set a property value.
void	setPropertyValues(Map map) Perform a batch update from a Map.
void	setPropertyValues(PropertyValues pvs) The preferred way to perform a batch update.
void	setPropertyValues(PropertyValues pvs, boolean ignoreUnknown) Perform a batch update with more control over behavior.
void	setPropertyValues(PropertyValues pvs, boolean ignoreUnknown, boolean ignoreInvalid) Perform a batch update with full control over behavior.

Field Detail

NESTED_PROPERTY_SEPARATOR

static final String NESTED_PROPERTY_SEPARATOR

Path separator for nested properties. Follows normal Java conventions: getFoo().getBar() would be "foo.bar".

See Also:

Constant Field Values

NESTED_PROPERTY_SEPARATOR_CHAR

static final char NESTED_PROPERTY_SEPARATOR_CHAR

See Also:

Constant Field Values

PROPERTY_KEY_PREFIX

static final String PROPERTY_KEY_PREFIX

Marker that indicates the start of a property key for an indexed or mapped property like "person.addresses[0]".

See Also:

Constant Field Values

PROPERTY_KEY_PREFIX_CHAR

static final char PROPERTY_KEY_PREFIX_CHAR

See Also:

Constant Field Values

PROPERTY_KEY_SUFFIX

static final String PROPERTY_KEY_SUFFIX

Marker that indicates the end of a property key for an indexed or mapped property like "person.addresses[0]".

See Also:

Constant Field Values

PROPERTY_KEY_SUFFIX_CHAR

static final char PROPERTY_KEY_SUFFIX_CHAR

See Also:

Constant Field Values

Method Detail

isReadableProperty

boolean isReadableProperty(String propertyName)
                           throws BeansException

Return whether this property is readable. Returns false if the property doesn't exist.

Parameters:

propertyName - property to check status for

Returns:

whether this property is readable

Throws:

BeansException

isWritableProperty

boolean isWritableProperty(String propertyName)
                           throws BeansException

Return whether this property is writable. Returns false if the property doesn't exist.

Parameters:

propertyName - property to check status for

Returns:

whether this property is writable

Throws:

BeansException

getPropertyType

Class getPropertyType(String propertyName)
                      throws BeansException

Determine the property type for a particular property, either checking the property descriptor or checking the value in case of an indexed or mapped element.

Parameters:

propertyName - property to check status for

Returns:

the property type for the particular property, or null if not determinable

Throws:

BeansException

getPropertyValue

Object getPropertyValue(String propertyName)
                        throws BeansException

Get the value of a property.

Parameters:

propertyName - name of the property to get the value of

Returns:

the value of the property

Throws:

InvalidPropertyException - if there is no such property or if the property isn't readable

PropertyAccessException - if the property was valid but the accessor method failed

BeansException

setPropertyValue

void setPropertyValue(String propertyName,
                      Object value)
                      throws BeansException

Set a property value.

Parameters:

propertyName - name of the property to set value of

value - the new value

Throws:

InvalidPropertyException - if there is no such property or if the property isn't writable

PropertyAccessException - if the property was valid but the accessor method failed or a type mismatch occured

BeansException

setPropertyValue

void setPropertyValue(PropertyValue pv)
                      throws BeansException

Set a property value.

Parameters:

pv - object containing the new property value

Throws:

InvalidPropertyException - if there is no such property or if the property isn't writable

PropertyAccessException - if the property was valid but the accessor method failed or a type mismatch occured

BeansException

setPropertyValues

void setPropertyValues(Map map)
                       throws BeansException

Perform a batch update from a Map.

Bulk updates from PropertyValues are more powerful: This method is provided for convenience. Behaviour will be identical to that of the setPropertyValues(PropertyValues) method.

Parameters:

map - Map to take properties from. Contains property value objects, keyed by property name

Throws:

InvalidPropertyException - if there is no such property or if the property isn't writable

PropertyBatchUpdateException - if one or more PropertyAccessExceptions occured for specific properties during the batch update. This exception bundles all individual PropertyAccessExceptions. All other properties will have been successfully updated.

BeansException

setPropertyValues

void setPropertyValues(PropertyValues pvs)
                       throws BeansException

The preferred way to perform a batch update.

Note that performing a batch update differs from performing a single update, in that an implementation of this class will continue to update properties if a recoverable error (such as a type mismatch, but not an invalid field name or the like) is encountered, throwing a PropertyBatchUpdateException containing all the individual errors. This exception can be examined later to see all binding errors. Properties that were successfully updated remain changed.

Does not allow unknown fields or invalid fields.

Parameters:

pvs - PropertyValues to set on the target object

Throws:

InvalidPropertyException - if there is no such property or if the property isn't writable

PropertyBatchUpdateException - if one or more PropertyAccessExceptions occured for specific properties during the batch update. This exception bundles all individual PropertyAccessExceptions. All other properties will have been successfully updated.

BeansException

See Also:

setPropertyValues(PropertyValues, boolean, boolean)

setPropertyValues

void setPropertyValues(PropertyValues pvs,
                       boolean ignoreUnknown)
                       throws BeansException

Perform a batch update with more control over behavior.

Note that performing a batch update differs from performing a single update, in that an implementation of this class will continue to update properties if a recoverable error (such as a type mismatch, but not an invalid field name or the like) is encountered, throwing a PropertyBatchUpdateException containing all the individual errors. This exception can be examined later to see all binding errors. Properties that were successfully updated remain changed.

Parameters:

pvs - PropertyValues to set on the target object

ignoreUnknown - should we ignore unknown properties (not found in the bean)

Throws:

InvalidPropertyException - if there is no such property or if the property isn't writable

PropertyBatchUpdateException - if one or more PropertyAccessExceptions occured for specific properties during the batch update. This exception bundles all individual PropertyAccessExceptions. All other properties will have been successfully updated.

BeansException

See Also:

setPropertyValues(PropertyValues, boolean, boolean)

setPropertyValues

void setPropertyValues(PropertyValues pvs,
                       boolean ignoreUnknown,
                       boolean ignoreInvalid)
                       throws BeansException

Perform a batch update with full control over behavior.

Note that performing a batch update differs from performing a single update, in that an implementation of this class will continue to update properties if a recoverable error (such as a type mismatch, but not an invalid field name or the like) is encountered, throwing a PropertyBatchUpdateException containing all the individual errors. This exception can be examined later to see all binding errors. Properties that were successfully updated remain changed.

Parameters:

pvs - PropertyValues to set on the target object

ignoreUnknown - should we ignore unknown properties (not found in the bean)

ignoreInvalid - should we ignore invalid properties (found but not accessible)

Throws:

InvalidPropertyException - if there is no such property or if the property isn't writable

PropertyBatchUpdateException - if one or more PropertyAccessExceptions occured for specific properties during the batch update. This exception bundles all individual PropertyAccessExceptions. All other properties will have been successfully updated.

BeansException