Package ch.tocco.nice2.toolbox.api.inject

Class SimpleInjector<T>

java.lang.Object

ch.tocco.nice2.toolbox.api.inject.SimpleInjector<T>

All Implemented Interfaces:

Injector<T>

public class SimpleInjector<T>
extends Object
implements Injector<T>

When instantiating, the first constructor where every argument can be found is used, where the order is from the most parameters to the least.

When initializing, first all setter methods are tried. Again the setters are only invoked if there is a argument value for every parameter. After this, all fields (which still null) are set if a value can be found. By default the type of the field/parameter is used to get the value from the ValueProvider. This can be overriden specifying the type using the

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javax.annotation.Resource

annotation.

At last the object to initialize is checked for implementing

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Initializable

. If so, the

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Initializable#afterInitialize()

method is invoked.

Constructor Summary

Constructors

Constructor	Description
SimpleInjector()
SimpleInjector(Class<T> clazz)

Method Summary

Modifier and Type	Method	Description
protected final Object	getFieldValue(Object target, Field field)
void	initialize(T object, ValueProvider provider)	First it uses Introspector to invoke all setter methods.
protected boolean	injectField(T object, Field field, FieldIterable.FieldIterator iter)	Check whether to set a field value.
T	instantiate(ValueProvider provider)	Creates a new instance by searching for a ctor that can be matched using values from the specified value provider.
protected void	invokeSetMethod(T owner, ValueProvider provider, PropertyDescriptor pdesc, Object curval, Class<?> beanClass)
protected void	invokeSetter(T owner, ValueProvider provider, BeanInfo info)
protected void	setFields(T object, ValueProvider provider)
protected final void	setFieldValue(Object target, Field field, Object value)
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

SimpleInjector

public SimpleInjector(Class<T> clazz)

SimpleInjector

public SimpleInjector()

Method Details

instantiate

public T instantiate(ValueProvider provider)

Description copied from interface: Injector

Creates a new instance by searching for a ctor that can be matched using values from the specified value provider. The best constructor is used, which is the one with the greatest number of arguments that can be retrieved using the specified ValueProvider.

Specified by:

instantiate in interface Injector<T>

initialize

public void initialize(T object,
 ValueProvider provider)

First it uses Introspector to invoke all setter methods. Then all fields are queried and each one is initialized if it is null. At last if the object implements

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Initializable

, its

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Initializable#afterInitialize()

is called.

Specified by:

initialize in interface Injector<T>

injectField

protected boolean injectField(T object,
 Field field,
 FieldIterable.FieldIterator iter)

Check whether to set a field value. This will return true for non-final fields that don't have a value yet and only non-private fields of superclass(es).

setFields

protected void setFields(T object,
 ValueProvider provider)

invokeSetter

protected void invokeSetter(T owner,
 ValueProvider provider,
 BeanInfo info)

invokeSetMethod

protected void invokeSetMethod(T owner,
 ValueProvider provider,
 PropertyDescriptor pdesc,
 Object curval,
 Class<?> beanClass)

getFieldValue

protected final Object getFieldValue(Object target,
 Field field)

setFieldValue

protected final void setFieldValue(Object target,
 Field field,
 Object value)

toString

public String toString()

Overrides:

toString in class Object