package org.drools.semantics.base;
/*
* Copyright 2004 (C) The Werken Company. All Rights Reserved.
*
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided that the
* following conditions are met:
*
* 1. Redistributions of source code must retain copyright statements and
* notices. Redistributions must also contain a copy of this document.
*
* 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 name "drools" must not be used to endorse or promote products derived
* from this Software without prior written permission of The Werken Company.
* For written permission, please contact bob@werken.com.
*
* 4. Products derived from this Software may not be called "drools" nor may
* "drools" appear in their names without prior written permission of The Werken
* Company. "drools" is a registered trademark of The Werken Company.
*
* 5. Due credit should be given to The Werken Company.
* (http://drools.werken.com/).
*
* THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS ``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 WERKEN COMPANY 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.
*
*/
import org.drools.rule.Rule;
import org.drools.smf.Configuration;
import org.drools.smf.FactoryException;
import org.drools.smf.ObjectTypeFactory;
import org.drools.spi.Importer;
import org.drools.spi.ObjectType;
import org.drools.spi.RuleBaseContext;
public class ClassObjectTypeFactory
implements
ObjectTypeFactory
{
private static final ClassObjectTypeFactory INSTANCE = new ClassObjectTypeFactory( );
public static ClassObjectTypeFactory getInstance()
{
return INSTANCE;
}
public ObjectType newObjectType(Rule rule,
RuleBaseContext context,
Configuration config) throws FactoryException
{
String className = config.getText( ).trim( );
if ( className == null || className.trim( ).equals( "" ) )
{
throw new FactoryException( "no class name specified" );
}
Class clazz = null;
try
{
ClassLoader cl = (ClassLoader) context.get( "smf-classLoader" );
if ( cl == null )
{
cl = Thread.currentThread( ).getContextClassLoader( );
context.put( "smf-classLoader",
cl );
}
if ( cl == null )
{
cl = getClass( ).getClassLoader( );
context.put( "smf-classLoader",
cl );
}
Importer importer = rule.getImporter( );
clazz = importer.importClass( cl,
className );
}
catch ( ClassNotFoundException e )
{
throw new FactoryException( e.getMessage( ) );
}
catch ( Error e )
{
throw new FactoryException( e.getMessage( ) );
}
return new ClassObjectType( clazz );
}
/*
* private Class importClass(ClassLoader cl, String importText, String
* className) { String qualifiedClass = null; Class clazz = null;
*
* String convertedImportText; if ( importText.startsWith( "from " ) ) {
* convertedImportText = converPythonImport( importText ); } else {
* convertedImportText = importText; }
* // not python if ( convertedImportText.endsWith( "*" ) ) {
* qualifiedClass = convertedImportText.substring( 0,
* convertedImportText.indexOf( '*' ) ) + className; } else if (
* convertedImportText.endsWith( "." + className ) ) { qualifiedClass =
* convertedImportText; } else if ( convertedImportText.equals( className ) ) {
* qualifiedClass = convertedImportText; }
*
*
* if ( qualifiedClass != null ) { try { clazz = cl.loadClass(
* qualifiedClass ); } catch ( ClassNotFoundException e ) { clazz = null; } }
* return clazz; }
*
* private String converPythonImport(String packageText) { String fromString =
* "from "; String importString = "import "; int fromIndex =
* packageText.indexOf( fromString ); int importIndex = packageText.indexOf(
* importString ); return packageText.substring( fromIndex +
* fromString.length( ), importIndex ).trim( ) + "." +
* packageText.substring( importIndex + importString.length( ) ).trim( ); }
*/
}