DefaultServiceFactory.java
/*
* Copyright (C) Christian Schulte <cs@schulte.it>, 2015-018
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* o Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* o 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.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS 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 AUTHORS OR COPYRIGHT HOLDERS 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.
*
* $JOMC: DefaultServiceFactory.java 5051 2015-05-30 17:29:32Z schulte $
*
*/
package org.jomc.modlet;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.text.MessageFormat;
import java.util.ResourceBundle;
import java.util.logging.Level;
/**
* Default {@code ServiceFactory} implementation.
*
* @author <a href="mailto:cs@schulte.it">Christian Schulte</a>
* @version $JOMC: DefaultServiceFactory.java 5051 2015-05-30 17:29:32Z schulte $
* @see ModelContext#createServiceObjects(java.lang.String, java.lang.String, java.lang.Class)
* @since 1.9
*/
public class DefaultServiceFactory implements ServiceFactory
{
/**
* Constant for the name of the system property controlling property {@code defaultOrdinal}.
*
* @see #getDefaultOrdinal()
*/
private static final String DEFAULT_ORDINAL_PROPERTY_NAME =
"org.jomc.modlet.DefaultServiceFactory.defaultOrdinal";
/**
* Default value of the ordinal number of the factory.
*
* @see #getDefaultOrdinal()
*/
private static final Integer DEFAULT_ORDINAL = 0;
/**
* Default ordinal number of the factory.
*/
private static volatile Integer defaultOrdinal;
/**
* Ordinal number of the factory.
*/
private Integer ordinal;
/**
* Creates a new {@code DefaultServiceFactory} instance.
*/
public DefaultServiceFactory()
{
super();
}
/**
* Gets the default ordinal number of the factory.
* <p>
* The default ordinal number is controlled by system property
* {@code org.jomc.modlet.DefaultServiceFactory.defaultOrdinal} holding the default ordinal number of the
* factory. If that property is not set, the {@code 0} default is returned.
* </p>
*
* @return The default ordinal number of the factory.
*
* @see #setDefaultOrdinal(java.lang.Integer)
*/
public static int getDefaultOrdinal()
{
if ( defaultOrdinal == null )
{
defaultOrdinal = Integer.getInteger( DEFAULT_ORDINAL_PROPERTY_NAME, DEFAULT_ORDINAL );
}
return defaultOrdinal;
}
/**
* Sets the default ordinal number of the factory.
*
* @param value The new default ordinal number of the factory or {@code null}.
*
* @see #getDefaultOrdinal()
*/
public static void setDefaultOrdinal( final Integer value )
{
defaultOrdinal = value;
}
/**
* Gets the ordinal number of the factory.
*
* @return The ordinal number of the factory.
*
* @see #getDefaultOrdinal()
* @see #setOrdinal(java.lang.Integer)
*/
public final int getOrdinal()
{
if ( this.ordinal == null )
{
this.ordinal = getDefaultOrdinal();
}
return this.ordinal;
}
/**
* Sets the ordinal number of the factory.
*
* @param value The new ordinal number of the factory or {@code null}.
*
* @see #getOrdinal()
*/
public final void setOrdinal( final Integer value )
{
this.ordinal = value;
}
public <T> T createServiceObject( final ModelContext context, final Service service, final Class<T> type )
throws ModelException
{
if ( context == null )
{
throw new NullPointerException( "context" );
}
if ( service == null )
{
throw new NullPointerException( "service" );
}
if ( type == null )
{
throw new NullPointerException( "type" );
}
try
{
final Class<?> clazz = context.findClass( service.getClazz() );
if ( clazz == null )
{
throw new ModelException( getMessage( "serviceNotFound", service.getOrdinal(), service.
getIdentifier(),
service.getClazz() ) );
}
if ( !type.isAssignableFrom( clazz ) )
{
throw new ModelException( getMessage( "illegalService", service.getOrdinal(), service.
getIdentifier(),
service.getClazz(), type.getName() ) );
}
final T serviceObject = clazz.asSubclass( type ).newInstance();
for ( int i = 0, s0 = service.getProperty().size(); i < s0; i++ )
{
final Property p = service.getProperty().get( i );
this.initProperty( context, serviceObject, p.getName(), p.getValue() );
}
return serviceObject;
}
catch ( final InstantiationException e )
{
throw new ModelException( getMessage( "failedCreatingObject", service.getClazz() ), e );
}
catch ( final IllegalAccessException e )
{
throw new ModelException( getMessage( "failedCreatingObject", service.getClazz() ), e );
}
}
private <T> void initProperty( final ModelContext context, final T object, final String propertyName,
final String propertyValue )
throws ModelException
{
if ( object == null )
{
throw new NullPointerException( "object" );
}
if ( propertyName == null )
{
throw new NullPointerException( "propertyName" );
}
try
{
final char[] chars = propertyName.toCharArray();
if ( Character.isLowerCase( chars[0] ) )
{
chars[0] = Character.toUpperCase( chars[0] );
}
final String methodNameSuffix = String.valueOf( chars );
Method getterMethod = null;
try
{
getterMethod = object.getClass().getMethod( "get" + methodNameSuffix );
}
catch ( final NoSuchMethodException e )
{
if ( context.isLoggable( Level.FINEST ) )
{
context.log( Level.FINEST, null, e );
}
getterMethod = null;
}
if ( getterMethod == null )
{
try
{
getterMethod = object.getClass().getMethod( "is" + methodNameSuffix );
}
catch ( final NoSuchMethodException e )
{
if ( context.isLoggable( Level.FINEST ) )
{
context.log( Level.FINEST, null, e );
}
getterMethod = null;
}
}
if ( getterMethod == null )
{
throw new ModelException( getMessage( "getterMethodNotFound", object.getClass().getName(),
propertyName ) );
}
final Class<?> propertyType = getterMethod.getReturnType();
Class<?> boxedPropertyType = propertyType;
Class<?> unboxedPropertyType = propertyType;
if ( Boolean.TYPE.equals( propertyType ) )
{
boxedPropertyType = Boolean.class;
}
else if ( Character.TYPE.equals( propertyType ) )
{
boxedPropertyType = Character.class;
}
else if ( Byte.TYPE.equals( propertyType ) )
{
boxedPropertyType = Byte.class;
}
else if ( Short.TYPE.equals( propertyType ) )
{
boxedPropertyType = Short.class;
}
else if ( Integer.TYPE.equals( propertyType ) )
{
boxedPropertyType = Integer.class;
}
else if ( Long.TYPE.equals( propertyType ) )
{
boxedPropertyType = Long.class;
}
else if ( Float.TYPE.equals( propertyType ) )
{
boxedPropertyType = Float.class;
}
else if ( Double.TYPE.equals( propertyType ) )
{
boxedPropertyType = Double.class;
}
if ( Boolean.class.equals( propertyType ) )
{
unboxedPropertyType = Boolean.TYPE;
}
else if ( Character.class.equals( propertyType ) )
{
unboxedPropertyType = Character.TYPE;
}
else if ( Byte.class.equals( propertyType ) )
{
unboxedPropertyType = Byte.TYPE;
}
else if ( Short.class.equals( propertyType ) )
{
unboxedPropertyType = Short.TYPE;
}
else if ( Integer.class.equals( propertyType ) )
{
unboxedPropertyType = Integer.TYPE;
}
else if ( Long.class.equals( propertyType ) )
{
unboxedPropertyType = Long.TYPE;
}
else if ( Float.class.equals( propertyType ) )
{
unboxedPropertyType = Float.TYPE;
}
else if ( Double.class.equals( propertyType ) )
{
unboxedPropertyType = Double.TYPE;
}
Method setterMethod = null;
try
{
setterMethod = object.getClass().getMethod( "set" + methodNameSuffix, boxedPropertyType );
}
catch ( final NoSuchMethodException e )
{
if ( context.isLoggable( Level.FINEST ) )
{
context.log( Level.FINEST, null, e );
}
setterMethod = null;
}
if ( setterMethod == null && !boxedPropertyType.equals( unboxedPropertyType ) )
{
try
{
setterMethod = object.getClass().getMethod( "set" + methodNameSuffix, unboxedPropertyType );
}
catch ( final NoSuchMethodException e )
{
if ( context.isLoggable( Level.FINEST ) )
{
context.log( Level.FINEST, null, e );
}
setterMethod = null;
}
}
if ( setterMethod == null )
{
throw new ModelException( getMessage( "setterMethodNotFound", object.getClass().getName(),
propertyName ) );
}
if ( boxedPropertyType.equals( Character.class ) )
{
if ( propertyValue == null || propertyValue.length() != 1 )
{
throw new ModelException( getMessage( "unsupportedCharacterValue", object.getClass().getName(),
propertyName ) );
}
setterMethod.invoke( object, propertyValue.charAt( 0 ) );
}
else if ( propertyValue != null )
{
invocation:
{
if ( boxedPropertyType.equals( String.class ) )
{
setterMethod.invoke( object, propertyValue );
break invocation;
}
try
{
setterMethod.invoke( object, boxedPropertyType.getConstructor( String.class ).
newInstance( propertyValue ) );
break invocation;
}
catch ( final NoSuchMethodException e1 )
{
if ( context.isLoggable( Level.FINEST ) )
{
context.log( Level.FINEST, null, e1 );
}
}
try
{
final Method valueOf = boxedPropertyType.getMethod( "valueOf", String.class );
if ( Modifier.isStatic( valueOf.getModifiers() )
&& ( valueOf.getReturnType().equals( boxedPropertyType )
|| valueOf.getReturnType().equals( unboxedPropertyType ) ) )
{
setterMethod.invoke( object, valueOf.invoke( null, propertyValue ) );
break invocation;
}
}
catch ( final NoSuchMethodException e2 )
{
if ( context.isLoggable( Level.FINEST ) )
{
context.log( Level.FINEST, null, e2 );
}
}
throw new ModelException( getMessage( "unsupportedPropertyType", object.getClass().getName(),
propertyName, propertyType.getName() ) );
}
}
else
{
setterMethod.invoke( object, (Object) null );
}
}
catch ( final IllegalAccessException e )
{
throw new ModelException( getMessage( "failedSettingProperty", propertyName, object.toString(),
object.getClass().getName() ), e );
}
catch ( final InvocationTargetException e )
{
throw new ModelException( getMessage( "failedSettingProperty", propertyName, object.toString(),
object.getClass().getName() ), e );
}
catch ( final InstantiationException e )
{
throw new ModelException( getMessage( "failedSettingProperty", propertyName, object.toString(),
object.getClass().getName() ), e );
}
}
private static String getMessage( final String key, final Object... arguments )
{
return MessageFormat.format( ResourceBundle.getBundle(
DefaultServiceFactory.class.getName().replace( '.', '/' ) ).getString( key ), arguments );
}
}