org.springframework.boot.context.properties.bind

Class AbstractBindHandler

java.lang.Object

org.springframework.boot.context.properties.bind.AbstractBindHandler

All Implemented Interfaces:

BindHandler

Direct Known Subclasses:

IgnoreErrorsBindHandler, IgnoreTopLevelConverterNotFoundBindHandler, NoUnboundElementsBindHandler, ValidationBindHandler

public abstract class AbstractBindHandler
extends Object
implements BindHandler

Abstract base class for BindHandler implementations.

Since:

2.0.0

Author:

Phillip Webb, Madhura Bhave

Field Summary

Fields inherited from interface org.springframework.boot.context.properties.bind.BindHandler

DEFAULT

Constructor Summary

Constructors

Constructor and Description
AbstractBindHandler() Create a new binding handler instance.
AbstractBindHandler(BindHandler parent) Create a new binding handler instance with a specific parent.

Method Summary

Modifier and Type	Method and Description
Object	onFailure(ConfigurationPropertyName name, Bindable<?> target, BindContext context, Exception error) Called when binding fails for any reason (including failures from BindHandler.onSuccess(org.springframework.boot.context.properties.source.ConfigurationPropertyName, org.springframework.boot.context.properties.bind.Bindable<?>, org.springframework.boot.context.properties.bind.BindContext, java.lang.Object) calls).
void	onFinish(ConfigurationPropertyName name, Bindable<?> target, BindContext context, Object result) Called when binding finishes with either bound or unbound result.
<T> Bindable<T>	onStart(ConfigurationPropertyName name, Bindable<T> target, BindContext context) Called when binding of an element starts but before any result has been determined.
Object	onSuccess(ConfigurationPropertyName name, Bindable<?> target, BindContext context, Object result) Called when binding of an element ends with a successful result.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractBindHandler

public AbstractBindHandler()

Create a new binding handler instance.

AbstractBindHandler

public AbstractBindHandler(BindHandler parent)

Create a new binding handler instance with a specific parent.

Parameters:

parent - the parent handler

Method Detail

onStart

public <T> Bindable<T> onStart(ConfigurationPropertyName name,
                               Bindable<T> target,
                               BindContext context)

Description copied from interface: BindHandler

Called when binding of an element starts but before any result has been determined.

Specified by:

onStart in interface BindHandler

Type Parameters:

T - the bindable source type

Parameters:

name - the name of the element being bound

target - the item being bound

context - the bind context

Returns:

the actual item that should be used for binding (may be null)

onSuccess

public Object onSuccess(ConfigurationPropertyName name,
                        Bindable<?> target,
                        BindContext context,
                        Object result)

Description copied from interface: BindHandler

Called when binding of an element ends with a successful result. Implementations may change the ultimately returned result or perform addition validation.

Specified by:

onSuccess in interface BindHandler

Parameters:

name - the name of the element being bound

target - the item being bound

context - the bind context

result - the bound result (never null)

Returns:

the actual result that should be used (may be null)

onFailure

public Object onFailure(ConfigurationPropertyName name,
                        Bindable<?> target,
                        BindContext context,
                        Exception error)
                 throws Exception

Description copied from interface: BindHandler

Called when binding fails for any reason (including failures from BindHandler.onSuccess(org.springframework.boot.context.properties.source.ConfigurationPropertyName, org.springframework.boot.context.properties.bind.Bindable<?>, org.springframework.boot.context.properties.bind.BindContext, java.lang.Object) calls). Implementations may choose to swallow exceptions and return an alternative result.

Specified by:

onFailure in interface BindHandler

Parameters:

name - the name of the element being bound

target - the item being bound

context - the bind context

error - the cause of the error (if the exception stands it may be re-thrown)

Returns:

the actual result that should be used (may be null).

Throws:

Exception - if the binding isn't valid

onFinish

public void onFinish(ConfigurationPropertyName name,
                     Bindable<?> target,
                     BindContext context,
                     Object result)
              throws Exception

Description copied from interface: BindHandler

Called when binding finishes with either bound or unbound result. This method will not be called when binding failed, even if a handler rurns a result from BindHandler.onFailure(org.springframework.boot.context.properties.source.ConfigurationPropertyName, org.springframework.boot.context.properties.bind.Bindable<?>, org.springframework.boot.context.properties.bind.BindContext, java.lang.Exception).

Specified by:

onFinish in interface BindHandler

Parameters:

name - the name of the element being bound

target - the item being bound

context - the bind context

result - the bound result (may be null)

Throws:

Exception - if the binding isn't valid