com.holonplatform.core.beans

Interface BeanIntrospector

public interface BeanIntrospector

Provides functionalities to introspect Java Beans and obtain informations about bean properties, methods and configuration.

Since:

5.0.0

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	BeanIntrospector.BeanIntrospectionException Exception thrown for bean introspection failures.

Field Summary

Fields

Modifier and Type	Field and Description
static String	CONTEXT_KEY Default Context resource key

Method Summary

Modifier and Type	Method and Description
void	addBeanPropertyPostProcessor(BeanPropertyPostProcessor beanPropertyPostProcessor) Adds a BeanPropertyPostProcessor to handle BeanProperty configuration during introspection.
boolean	clearCache() If caching is enabled and supported, clear current introspection cache.
static BeanIntrospector	get() Gets the current BeanIntrospector instance.
static BeanIntrospector	getDefault() Return the default BeanIntrospector using default ClassLoader.
static BeanIntrospector	getDefault(ClassLoader classLoader) Return the default BeanIntrospector using given classLoader.
default <T> BeanPropertySet<T>	getPropertySet(Class<? extends T> beanClass) Introspect given Java Bean beanClass and provides a BeanPropertySet to learn about bean properties and configuration.
<T> BeanPropertySet<T>	getPropertySet(Class<? extends T> beanClass, Path<?> parentPath) Introspect given Java Bean beanClass and provides a BeanPropertySet to learn about bean properties and configuration.
default <T> PropertyBox	read(PropertyBox propertyBox, T instance) Read the property values from given bean instance into the given PropertyBox, using given propertyBox property set.
default <T> PropertyBox	read(PropertyBox propertyBox, T instance, boolean ignoreMissing) Read the property values from given bean instance into the given PropertyBox, using given propertyBox property set.
void	removeBeanPropertyPostProcessor(BeanPropertyPostProcessor beanPropertyPostProcessor) Removes a BeanPropertyPostProcessor.
default <T> T	write(PropertyBox propertyBox, T instance) Write the property values contained into given PropertyBox into given bean instance.
default <T> T	write(PropertyBox propertyBox, T instance, boolean ignoreMissing) Write the property values contained into given PropertyBox into given bean instance.

Field Detail

CONTEXT_KEY

static final String CONTEXT_KEY

Default Context resource key

Method Detail

getPropertySet

default <T> BeanPropertySet<T> getPropertySet(Class<? extends T> beanClass)

Introspect given Java Bean beanClass and provides a BeanPropertySet to learn about bean properties and configuration.

Type Parameters:

T - Bean class type

Parameters:

beanClass - Bean class to introspect (not null)

Returns:

A BeanPropertySet describing the target bean properties and configuration

Throws:

BeanIntrospector.BeanIntrospectionException - If an exception occurs during introspection

getPropertySet

<T> BeanPropertySet<T> getPropertySet(Class<? extends T> beanClass,
                                      Path<?> parentPath)

Introspect given Java Bean beanClass and provides a BeanPropertySet to learn about bean properties and configuration. If a parentPath is specified, it will be setted as bean root properties parent path.

Type Parameters:

T - Bean class type

Parameters:

beanClass - Bean class to introspect (not null)

parentPath - Optional parent path to set as bean root properties parent path

Returns:

A BeanPropertySet describing the target bean properties and configuration

Throws:

BeanIntrospector.BeanIntrospectionException - If an exception occurs during introspection

read

default <T> PropertyBox read(PropertyBox propertyBox,
                             T instance,
                             boolean ignoreMissing)

Read the property values from given bean instance into the given PropertyBox, using given propertyBox property set.

The matching between the PropertyBox properties and the bean properties is performed by property name, so only the PropertyBox properties which implements Path will be taken into account, using Path.getName() as property name.

Any PropertyValueConverter will be applied to read values from bean data model.

Type Parameters:

T - Bean type

Parameters:

ignoreMissing - true to ignore properties of the PropertyBox property set which are not present as bean property. If false, when a property of the PropertyBox property set does not match with any of the bean properties, a Property.PropertyNotFoundException is thrown.

propertyBox - PropertyBox into which to write the property values (not null)

instance - Bean instance from which read the property values (not null)

Returns:

The updated PropertyBox

Throws:

Property.PropertyNotFoundException - If ignoreMissing is false and a property of the PropertyBox property set does not match with any of the bean properties

Property.PropertyAccessException - Error accessing bean properties

TypeMismatchException - If the bean property type and the PropertyBox property type mismatch for a property

Validator.ValidationException - If not PropertyBox.isInvalidAllowed() for given property box and one of the property values validation failed

read

default <T> PropertyBox read(PropertyBox propertyBox,
                             T instance)

Read the property values from given bean instance into the given PropertyBox, using given propertyBox property set.

The matching between the PropertyBox properties and the bean properties is performed by property name, so only the PropertyBox properties which implements Path will be taken into account, using Path.getName() as property name.

Any PropertyValueConverter will be applied to read values from bean data model.

Type Parameters:

T - Bean type

Parameters:

propertyBox - PropertyBox into which to write the property values (not null)

instance - Bean instance from which read the property values (not null)

Returns:

The updated PropertyBox

Throws:

Property.PropertyNotFoundException - If a property of the PropertyBox property set does not match with any of the bean properties

Property.PropertyAccessException - Error accessing bean properties

TypeMismatchException - If the bean property type and the PropertyBox property type mismatch for a property

Validator.ValidationException - If not PropertyBox.isInvalidAllowed() for given property box and one of the property values validation failed

write

default <T> T write(PropertyBox propertyBox,
                    T instance,
                    boolean ignoreMissing)

Write the property values contained into given PropertyBox into given bean instance.

The matching between the PropertyBox properties and the bean properties is performed by property name, so only the PropertyBox properties which implements Path will be taken into account, using Path.getName() as property name.

Any PropertyValueConverter will be applied to write values to bean data model.

Type Parameters:

T - Bean type

Parameters:

ignoreMissing - true to ignore properties of the PropertyBox property set which are not present as bean property. If false, when a property of the PropertyBox property set does not match with any of the bean properties, a Property.PropertyNotFoundException is thrown.

propertyBox - PropertyBox from which read the property values (not null)

instance - Bean instance to which to write the property values (not null)

Returns:

The updated bean instance

Throws:

Property.PropertyNotFoundException - If ignoreMissing is false and a property of the PropertyBox property set does not match with any of the bean properties

Property.PropertyAccessException - Error accessing bean properties

TypeMismatchException - If the bean property type and the PropertyBox property type mismatch for a property

write

default <T> T write(PropertyBox propertyBox,
                    T instance)

Write the property values contained into given PropertyBox into given bean instance.

The matching between the PropertyBox properties and the bean properties is performed by property name, so only the PropertyBox properties which implements Path will be taken into account, using Path.getName() as property name.

Any PropertyValueConverter will be applied to write values to bean data model.

Type Parameters:

T - Bean type

Parameters:

propertyBox - PropertyBox from which read the property values (not null)

instance - Bean instance to which to write the property values (not null)

Returns:

The updated bean instance

Throws:

Property.PropertyNotFoundException - If a property of the PropertyBox property set does not match with any of the bean properties

Property.PropertyAccessException - Error accessing bean properties

TypeMismatchException - If the bean property type and the PropertyBox property type mismatch for a property

addBeanPropertyPostProcessor

void addBeanPropertyPostProcessor(BeanPropertyPostProcessor beanPropertyPostProcessor)

Adds a BeanPropertyPostProcessor to handle BeanProperty configuration during introspection.

Parameters:

beanPropertyPostProcessor - BeanPropertyPostProcessor to add (not null)

removeBeanPropertyPostProcessor

void removeBeanPropertyPostProcessor(BeanPropertyPostProcessor beanPropertyPostProcessor)

Removes a BeanPropertyPostProcessor.

Parameters:

beanPropertyPostProcessor - BeanPropertyPostProcessor to remove (not null)

clearCache

boolean clearCache()

If caching is enabled and supported, clear current introspection cache.

Returns:

true if caching is supported and was cleared

get

static BeanIntrospector get()

Gets the current BeanIntrospector instance.

Returns:

The Context-bound BeanIntrospector instance, if available using CONTEXT_KEY as context key, or the default instance for the default ClassLoader obtained through getDefault().

getDefault

static BeanIntrospector getDefault(ClassLoader classLoader)

Return the default BeanIntrospector using given classLoader.

The default introspector is inited loading BeanPropertyPostProcessors using fully qualified name of its implementation class name to a com.holonplatform.core.beans.BeanPropertyPostProcessor file in the META-INF/services directory.

Parameters:

classLoader - ClassLoader to use

Returns:

Default BeanIntrospector

getDefault

static BeanIntrospector getDefault()

Return the default BeanIntrospector using default ClassLoader.

The default introspector is inited loading BeanPropertyPostProcessors using fully qualified name of its implementation class name to a com.holonplatform.core.beans.BeanPropertyPostProcessor file in the META-INF/services directory.

Returns:

Default BeanIntrospector