org.jboss.beans.metadata.plugins
Class AbstractTypeMetaData

java.lang.Object
  org.jboss.util.JBossObject
      org.jboss.beans.metadata.plugins.AbstractValueMetaData
          org.jboss.beans.metadata.plugins.AbstractTypeMetaData

All Implemented Interfaces:

Serializable, Cloneable, TypeProvider, MetaDataVisitorNode, ValueMetaData, org.jboss.util.JBossInterface

Direct Known Subclasses:

AbstractCollectionMetaData, AbstractMapMetaData, StringValueMetaData

public abstract class AbstractTypeMetaData
extends AbstractValueMetaData
implements Serializable

A typed value.

Version:

$Revision: 64331 $

Author:

Adrian Brock, Ales Justin

See Also:

Serialized Form

Field Summary

protected String	beanName The bean name
protected KernelConfigurator	configurator The configurator
protected org.jboss.dependency.spi.ControllerContext	context The context
protected String	propertyName The property name
protected String	type The type

Fields inherited from class org.jboss.util.JBossObject

hashCode, log, toString

Fields inherited from interface org.jboss.beans.metadata.plugins.TypeProvider

ERROR_MSG

Constructor Summary

AbstractTypeMetaData()
Create a new typed value

AbstractTypeMetaData(String value)
Create a new typed value

Method Summary

protected <T> T	checkResult(Object result, Class<T> expected) Check result for class compatibility.
protected <T> T	createInstance(org.jboss.reflect.spi.TypeInfo info, ClassLoader cl, Class<T> expected, boolean explicit) Create new instance from type field.
protected org.jboss.reflect.spi.ClassInfo	getClass(MetaDataVisitor visitor, String classType)
protected org.jboss.reflect.spi.ClassInfo	getClassInfo(ClassLoader cl) Get the class info for this type
protected org.jboss.reflect.spi.ClassInfo	getClassInfo(String classType, ClassLoader cl)
protected abstract Object	getDefaultInstance() Get the default instance.
String	getType()
protected <T> T	getTypeInstance(org.jboss.reflect.spi.TypeInfo info, ClassLoader cl, Class<T> expected) Create the class instance
void	initialVisit(MetaDataVisitor visitor) Visit the node
protected <T> T	preinstantiatedLookup(ClassLoader cl, Class<T> expected) Check for already existing instances.
protected void	preparePreinstantiatedLookup(MetaDataVisitor visitor) Check if we can extract the information about existing instance - only on property metadata.
void	setConfigurator(KernelConfigurator configurator) Set the configurator
void	setType(String type) Set the type
void	toString(org.jboss.util.JBossStringBuilder buffer)

Methods inherited from class org.jboss.beans.metadata.plugins.AbstractValueMetaData

describeVisit, getChildren, getType, getUnderlyingValue, getValue, getValue, setValue, toShortString

Methods inherited from class org.jboss.util.JBossObject

cacheGetHashCode, cacheToString, clone, equals, flushJBossObjectCache, getClassShortName, getHashCode, hashCode, list, notEqual, toShortString, toString, toStringImplementation

Methods inherited from class java.lang.Object

equals, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.jboss.util.JBossInterface

clone, toShortString

Field Detail

type

protected String type

The type

context

protected transient org.jboss.dependency.spi.ControllerContext context

The context

configurator

protected transient KernelConfigurator configurator

The configurator

propertyName

protected String propertyName

The property name

beanName

protected String beanName

The bean name

Constructor Detail

AbstractTypeMetaData

public AbstractTypeMetaData()

Create a new typed value

AbstractTypeMetaData

public AbstractTypeMetaData(String value)

Create a new typed value

Parameters:

value - the value

Method Detail

setType

public void setType(String type)

Set the type

Parameters:

type - the type

getType

public String getType()

initialVisit

public void initialVisit(MetaDataVisitor visitor)

Description copied from interface: MetaDataVisitorNode

Visit the node

Specified by:

initialVisit in interface MetaDataVisitorNode

Overrides:

initialVisit in class AbstractValueMetaData

Parameters:

visitor - the visitor

preparePreinstantiatedLookup

protected void preparePreinstantiatedLookup(MetaDataVisitor visitor)

Check if we can extract the information about existing instance - only on property metadata.

Parameters:

visitor - underlying visitor

preinstantiatedLookup

protected <T> T preinstantiatedLookup(ClassLoader cl,
                                      Class<T> expected)

Check for already existing instances.

Type Parameters:

T - expected type

Parameters:

cl - the classloader

expected - the expected class

Returns:

existing instance or null otherwise

checkResult

protected <T> T checkResult(Object result,
                            Class<T> expected)

Check result for class compatibility.

Type Parameters:

T - the expected type

Parameters:

result - the result

expected - expected class

Returns:

casted result

Throws:

ClassCastException - if result cannot be casted into expected parameter

createInstance

protected <T> T createInstance(org.jboss.reflect.spi.TypeInfo info,
                               ClassLoader cl,
                               Class<T> expected,
                               boolean explicit)
                    throws Throwable

Create new instance from type field. Fall back to info parameter if no type field is set.

Type Parameters:

T - expected type

Parameters:

info - the type of reference we are about to set

cl - the classloader to use

expected - the expected class

explicit - is type explicit

Returns:

class instance or null if type is too broad

Throws:

Throwable - on any error

getTypeInstance

protected <T> T getTypeInstance(org.jboss.reflect.spi.TypeInfo info,
                                ClassLoader cl,
                                Class<T> expected)
                     throws Throwable

Create the class instance

Type Parameters:

T - expected type

Parameters:

info - the request type

cl - the classloader

expected - the expected class

Returns:

the class instance

Throws:

Throwable - for any error

getDefaultInstance

protected abstract Object getDefaultInstance()

Get the default instance.

Returns:

the default instance

setConfigurator

public void setConfigurator(KernelConfigurator configurator)

Set the configurator

Parameters:

configurator - the configurator

toString

public void toString(org.jboss.util.JBossStringBuilder buffer)

Overrides:

toString in class AbstractValueMetaData

getClassInfo

protected org.jboss.reflect.spi.ClassInfo getClassInfo(ClassLoader cl)
                                                throws Throwable

Get the class info for this type

Parameters:

cl - classloader

Returns:

the class info

Throws:

Throwable - for any error

getClassInfo

protected org.jboss.reflect.spi.ClassInfo getClassInfo(String classType,
                                                       ClassLoader cl)
                                                throws Throwable

Throws:

Throwable

getClass

protected org.jboss.reflect.spi.ClassInfo getClass(MetaDataVisitor visitor,
                                                   String classType)
                                            throws Throwable

Throws:

Throwable