mcconnell 2002/11/18 02:57:21
Added: assembly/src/java/org/apache/excalibur/assembly/type
UnknownTypeException.java TypeRuntimeException.java
TypeManager.java TypeException.java package.html
DefaultTypeManager.java
Log:
Addition of the first cut of the refactoring of the type management system.
This includes a clean seperation of a type repository from the classloader
through the defintion of a TypeManager and default implemetation.
Revision Changes Path
1.1
jakarta-avalon-excalibur/assembly/src/java/org/apache/excalibur/assembly/type/UnknownTypeException.java
Index: UnknownTypeException.java
===================================================================
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software
* itself, if and wherever such third-party acknowledgments
* normally appear.
*
* 4. The names "Jakarta", "Avalon", and "Apache Software Foundation"
* must not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.excalibur.assembly.type;
/**
* Exception to indicate that a type is unknown within the scope of a type manager.
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Stephen McConnell</a>
* @version $Revision: 1.1 $ $Date: 2002/11/18 10:57:20 $
*/
public final class UnknownTypeException
extends TypeException
{
/**
* Construct a new <code>UnknownTypeException</code> instance.
*
* @param message The detail message for this exception.
*/
public UnknownTypeException( final String message )
{
this( message, null );
}
/**
* Construct a new <code>UnknownTypeException</code> instance.
*
* @param message The detail message for this exception.
* @param throwable the root cause of the exception
*/
public UnknownTypeException( final String message, final Throwable throwable )
{
super( message, throwable );
}
}
1.1
jakarta-avalon-excalibur/assembly/src/java/org/apache/excalibur/assembly/type/TypeRuntimeException.java
Index: TypeRuntimeException.java
===================================================================
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software
* itself, if and wherever such third-party acknowledgments
* normally appear.
*
* 4. The names "Jakarta", "Avalon", and "Apache Software Foundation"
* must not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.excalibur.assembly.type;
import org.apache.avalon.framework.CascadingRuntimeException;
/**
* Exception to indicate that there was a type related runtime error.
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Stephen McConnell</a>
* @version $Revision: 1.1 $ $Date: 2002/11/18 10:57:20 $
*/
public final class TypeRuntimeException
extends CascadingRuntimeException
{
/**
* Construct a new <code>TypeRuntimeException</code> instance.
*
* @param message The detail message for this exception.
*/
public TypeRuntimeException( final String message )
{
this( message, null );
}
/**
* Construct a new <code>TypeRuntimeException</code> instance.
*
* @param message The detail message for this exception.
* @param throwable the root cause of the exception
*/
public TypeRuntimeException( final String message, final Throwable throwable )
{
super( message, throwable );
}
}
1.1
jakarta-avalon-excalibur/assembly/src/java/org/apache/excalibur/assembly/type/TypeManager.java
Index: TypeManager.java
===================================================================
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software
* itself, if and wherever such third-party acknowledgments
* normally appear.
*
* 4. The names "Jakarta", "Avalon", and "Apache Software Foundation"
* must not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.excalibur.assembly.type;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.excalibur.meta.info.Type;
import org.apache.excalibur.meta.info.builder.TypeCreator;
import org.apache.excalibur.meta.info.DependencyDescriptor;
import org.apache.excalibur.meta.info.StageDescriptor;
/**
* A type manager implemetation provides support for the creation,
* storage and retrival of component types.
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Stephen McConnell</a>
* @version $Revision: 1.1 $ $Date: 2002/11/18 10:57:21 $
*/
public interface TypeManager
{
/**
* Register a type. The implementation will create and verirfy
* a component type instance for the entry if not already known and
* return the existing or new instance to the invoking client.
*
* @param path the component class name
* @return the component type
* @exception Exception if a registration failure occurs
*/
Type register( String path ) throws TypeException;
/**
* Locate a {@link Type} instances associated with the
* supplied implementation classname.
* @return the type matching the supplied implementation classname.
* @exception UnknownTypeException if a matching type cannot be found
*/
Type locate( String classname ) throws UnknownTypeException;
/**
* Locate the set of component types capable of services the supplied
* dependency.
* @param a service depedency descriptor
* @return a set of types capable of servicing the supplied dependency
*/
Type[] match( DependencyDescriptor dependency );
/**
* Locate the set of component types that provide the supplied extension.
* @param service a service descriptor
* @return a set of types that provide the supplied service
*/
Type[] match( StageDescriptor stage );
}
1.1
jakarta-avalon-excalibur/assembly/src/java/org/apache/excalibur/assembly/type/TypeException.java
Index: TypeException.java
===================================================================
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software
* itself, if and wherever such third-party acknowledgments
* normally appear.
*
* 4. The names "Jakarta", "Avalon", and "Apache Software Foundation"
* must not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.excalibur.assembly.type;
import org.apache.avalon.framework.CascadingException;
/**
* Exception to indicate that there was a type related error.
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Stephen McConnell</a>
* @version $Revision: 1.1 $ $Date: 2002/11/18 10:57:21 $
*/
public class TypeException
extends CascadingException
{
/**
* Construct a new <code>TypeException</code> instance.
*
* @param message The detail message for this exception.
*/
public TypeException( final String message )
{
this( message, null );
}
/**
* Construct a new <code>TypeException</code> instance.
*
* @param message The detail message for this exception.
* @param throwable the root cause of the exception
*/
public TypeException( final String message, final Throwable throwable )
{
super( message, throwable );
}
}
1.1
jakarta-avalon-excalibur/assembly/src/java/org/apache/excalibur/assembly/type/package.html
Index: package.html
===================================================================
<body>
<p>
The <code>type</code> package contains classes and interfaces for the {@link
org.apache.excalibur.assembly.type.TypeManager} and related default implementations
supporting the management of a repository of component types.
</p>
</body>
1.1
jakarta-avalon-excalibur/assembly/src/java/org/apache/excalibur/assembly/type/DefaultTypeManager.java
Index: DefaultTypeManager.java
===================================================================
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software
* itself, if and wherever such third-party acknowledgments
* normally appear.
*
* 4. The names "Jakarta", "Avalon", and "Apache Software Foundation"
* must not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.excalibur.assembly.type;
import java.util.Map;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.ArrayList;
import org.apache.avalon.framework.logger.Logger;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.excalibur.meta.info.Type;
import org.apache.excalibur.meta.info.builder.TypeBuilder;
import org.apache.excalibur.meta.info.builder.TypeCreator;
import org.apache.excalibur.meta.info.ReferenceDescriptor;
import org.apache.excalibur.meta.info.DependencyDescriptor;
import org.apache.excalibur.meta.info.ServiceDescriptor;
import org.apache.excalibur.meta.info.StageDescriptor;
import org.apache.excalibur.meta.verifier.ComponentVerifier;
/**
* A type manager implemetation provides support for the creation,
* storage and retrival of component types.
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Stephen McConnell</a>
* @version $Revision: 1.1 $ $Date: 2002/11/18 10:57:21 $
*/
public class DefaultTypeManager extends AbstractLogEnabled implements TypeManager
{
//==============================================================
// state
//==============================================================
/**
* The classloader supplied to the manager.
*/
private final ClassLoader m_classloader;
/**
* The parent type manager (may be null)
*/
private final TypeManager m_parent;
/**
* The type builder.
*/
private final TypeBuilder m_builder = new TypeBuilder();
/**
* Table of component types keyed by implementation classname.
*/
private Hashtable m_types = new Hashtable();
//==============================================================
// constructor
//==============================================================
/**
* Creation of a new {@link TypeManager} based on a supplied parent
* and classloader.
* @param parent the parent type manager (may be null)
* @param classloader the classloader
*/
public DefaultTypeManager( TypeManager parent, ClassLoader classloader )
{
if( classloader == null )
{
throw new NullPointerException("classloader");
}
m_parent = parent;
m_classloader = classloader;
}
//==============================================================
// LogEnabled
//==============================================================
/**
* Setup logging for all subcomponents
* @param logger the logging channel
*/
public void enableLogging( final Logger logger )
{
super.enableLogging( logger );
m_builder.enableLogging( logger.getChildLogger( "builder" ) );
}
//==============================================================
// TypeManager
//==============================================================
/**
* Register a type. The implementation will create and verirfy
* a component type instance for the entry if not already known and
* return the existing or new instance to the invoking client.
*
* @param path the component class name
* @return the component type
*/
public Type register( String path ) throws TypeException
{
final String classname = path.replace( '/', '.' );
Type type;
try
{
type = locate( classname );
}
catch( UnknownTypeException ute )
{
try
{
type = m_builder.build( classname, m_classloader );
}
catch( Throwable e )
{
final String error =
"Could not register a type relative to the path: "
+ path
+ " due to a type build error.";
throw new TypeException( error, e );
}
try
{
verify( type );
}
catch( Throwable e )
{
final String error =
"Could not register a type relative to the path: "
+ path
+ " due to a type verification failure.";
throw new TypeException( error, e );
}
if( getLogger().isDebugEnabled() )
{
getLogger().debug("registering type: " + classname );
}
m_types.put( classname, type );
}
return type;
}
/**
* Locate a {@link Type} instances associated with the
* supplied implementation classname.
* @return the type matching the supplied implementation classname.
* @exception UnknownTypeException if a matching type cannot be found
*/
public Type locate( String classname ) throws UnknownTypeException
{
Type type = (Type) m_types.get( classname );
if( type == null )
{
throw new UnknownTypeException( classname );
}
return type;
}
/**
* Locate the set of component types capable of services the supplied
* dependency.
* @param a service depedency descriptor
* @return a set of types capable of servicing the supplied dependency
*/
public Type[] match( DependencyDescriptor dependency )
{
ArrayList list = new ArrayList();
if( m_parent != null )
{
Type[] types = m_parent.match( dependency );
for( int i=0; i<types.length; i++ )
{
list.add( types[i] );
}
}
ReferenceDescriptor reference = dependency.getReference();
Iterator iterator = m_types.entrySet().iterator();
while( iterator.hasNext() )
{
Type type = (Type) iterator.next();
Object service = type.getService( reference );
if( service != null )
{
list.add( type );
}
}
return (Type[]) list.toArray( new Type[0] );
}
/**
* Locate the set of component types that provide the supplied extension.
* @param service a service descriptor
* @return a set of types that provide the supplied service
*/
public Type[] match( StageDescriptor stage )
{
ArrayList list = new ArrayList();
if( m_parent != null )
{
Type[] types = m_parent.match( stage );
for( int i=0; i<types.length; i++ )
{
list.add( types[i] );
}
}
Iterator iterator = m_types.entrySet().iterator();
while( iterator.hasNext() )
{
Type type = (Type) iterator.next();
if( type.getExtension( stage ) != null )
{
list.add( type );
}
}
return (Type[]) list.toArray( new Type[0] );
}
private void verify( Type type ) throws Exception
{
String name = type.getInfo().getName();
Class clazz = getComponentClass( type );
Class[] classes = getServiceClasses( type );
ComponentVerifier verifier = new ComponentVerifier();
verifier.enableLogging( getLogger().getChildLogger( "verifier" ) );
verifier.verifyComponent( name, clazz, classes );
}
/**
* Return the set of interface classes for a given type that are declared
* or default to the "native" service access protocol and where the
* service access model is undefined (i.e. native implementation).
* access mode.
*
* @param type the component type
* @return an array of classes represnting the type's service interfaces
*/
private Class[] getServiceClasses( Type type )
{
ArrayList list = new ArrayList();
ServiceDescriptor[] services = type.getServices();
for( int i = 0; i < services.length; i++ )
{
ServiceDescriptor service = services[ i ];
if( ( service.getAttribute( "avalon:service.protocol", "native"
).equals( "native" ) )
&& ( service.getAttribute( "avalon:service.accessor", null ) == null
) )
{
list.add( getServiceClass( services[ i ] ) );
}
}
return ( Class[]) list.toArray( new Class[0] );
}
/**
* Returns the component type implementation class.
* @param type the component type descriptor
* @return the class implementing the component type
* @exception TypeException if a classloader error occurs
*/
private Class getComponentClass( Type type ) throws TypeException
{
if( null == type )
{
throw new NullPointerException( "type" );
}
final String classname = type.getInfo().getImplementationKey();
try
{
return m_classloader.loadClass( classname );
}
catch( Throwable e )
{
final String error = "Could not load implementation class for component
type: "
+ classname;
throw new TypeException( error, e );
}
}
/**
* Returns the service type implementation class.
* @param service the service type descriptor
* @return the class implementing the service type
* @exception TypeRuntimeException if a classloader error occurs
*/
private Class getServiceClass( ServiceDescriptor service ) throws
TypeRuntimeException
{
final String classname = service.getReference().getClassname();
try
{
return m_classloader.loadClass( classname );
}
catch( Throwable e )
{
final String error = "Could not load implementation class for service
type: "
+ classname;
throw new TypeRuntimeException( error, e );
}
}
}
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