Package org.picocontainer.parameters

Class ConstantParameter

java.lang.Object

org.picocontainer.parameters.AbstractParameter

org.picocontainer.parameters.ConstantParameter

All Implemented Interfaces:

java.io.Serializable, Parameter

public class ConstantParameter
extends AbstractParameter
implements Parameter, java.io.Serializable

A ConstantParameter should be used to pass in "constant" arguments to constructors. This includes Strings,Integers or any other object that is not registered in the container.

Author:

Jon Tirsén, Aslak Hellesøy, Jörg Schaible, Thomas Heller

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.picocontainer.Parameter

Parameter.DelegateResolver, Parameter.NotResolved, Parameter.Resolver, Parameter.ValueResolver

Field Summary

Fields inherited from interface org.picocontainer.Parameter

DEFAULT, ZERO

Constructor Summary

Constructors

Constructor	Description
ConstantParameter(java.lang.Object value)

Method Summary

Modifier and Type	Method	Description
void	accept(PicoVisitor visitor)	Visit the current Parameter.
protected boolean	isAssignable(java.lang.reflect.Type expectedType)
Parameter.Resolver	resolve(PicoContainer container, ComponentAdapter<?> forAdapter, ComponentAdapter<?> injecteeAdapter, java.lang.reflect.Type expectedType, NameBinding expectedNameBinding, boolean useNames, java.lang.annotation.Annotation binding)	Check if the Parameter can satisfy the expected type using the container.
void	verify(PicoContainer container, ComponentAdapter<?> adapter, java.lang.reflect.Type expectedType, NameBinding expectedNameBinding, boolean useNames, java.lang.annotation.Annotation binding)	Verify that the Parameter can satisfy the expected type using the container

Methods inherited from class org.picocontainer.parameters.AbstractParameter

isResolvable, resolveInstance

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.picocontainer.Parameter

isResolvable, resolveInstance

Constructor Detail

ConstantParameter

public ConstantParameter(java.lang.Object value)

Method Detail

resolve

public Parameter.Resolver resolve(PicoContainer container,
                                  ComponentAdapter<?> forAdapter,
                                  ComponentAdapter<?> injecteeAdapter,
                                  java.lang.reflect.Type expectedType,
                                  NameBinding expectedNameBinding,
                                  boolean useNames,
                                  java.lang.annotation.Annotation binding)

Description copied from interface: Parameter

Check if the Parameter can satisfy the expected type using the container.

Specified by:

resolve in interface Parameter

Parameters:

container - the container from which dependencies are resolved.

forAdapter - the ComponentAdapter that is asking for the instance

injecteeAdapter - the adapter to be injected into (null for N/A)

expectedType - the required type

expectedNameBinding - Expected parameter name

useNames - should use parameter names for disambiguation

Returns:

true if the component parameter can be resolved.

verify

public void verify(PicoContainer container,
                   ComponentAdapter<?> adapter,
                   java.lang.reflect.Type expectedType,
                   NameBinding expectedNameBinding,
                   boolean useNames,
                   java.lang.annotation.Annotation binding)
            throws PicoException

Verify that the Parameter can satisfy the expected type using the container

Specified by:

verify in interface Parameter

Parameters:

container - the container from which dependencies are resolved.

adapter - the ComponentAdapter that is asking for the verification

expectedType - the required type

expectedNameBinding - Expected parameter name

Throws:

PicoCompositionException - if parameter and its dependencies cannot be resolved

PicoException

See Also:

Parameter.verify(org.picocontainer.PicoContainer,org.picocontainer.ComponentAdapter,java.lang.reflect.Type,org.picocontainer.NameBinding,boolean,java.lang.annotation.Annotation)

isAssignable

protected boolean isAssignable(java.lang.reflect.Type expectedType)

accept

public void accept(PicoVisitor visitor)

Visit the current Parameter.

Specified by:

accept in interface Parameter

Parameters:

visitor - the visitor.

See Also:

Parameter.accept(org.picocontainer.PicoVisitor)