/*******************************************************************************
* Copyright (c) 1998, 2012 Oracle and/or its affiliates. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* dmccann - Nov 4/2008 - 1.1 - Initial implementation
******************************************************************************/
package org.eclipse.persistence.sdo.helper.delegates;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.persistence.exceptions.SDOException;
import org.eclipse.persistence.sdo.SDODataObject;
import org.eclipse.persistence.sdo.SDOType;
import org.eclipse.persistence.sdo.helper.SDODataFactory;
import org.eclipse.persistence.sdo.helper.SDOTypeHelper;
import org.eclipse.persistence.sdo.helper.SDOXMLHelper;
import commonj.sdo.DataObject;
import commonj.sdo.Type;
import commonj.sdo.helper.HelperContext;
/**
* <p><b>Purpose</b>: Helper to provide access to SDO Data Factory.
* <p><b>Responsibilities</b>:<ul>
* <li> Create DataObjects for given uri/typename pairs, interface class or type
* </ul>
*/
public class SDODataFactoryDelegate implements SDODataFactory {
private HelperContext aHelperContext;
public SDODataFactoryDelegate(HelperContext aContext) {
// set context before initializing maps
aHelperContext = aContext;
}
public DataObject create(String uri, String typeName) {
Type sdoType = getHelperContext().getTypeHelper().getType(uri, typeName);
if (sdoType != null) {
return create(sdoType);
}
throw new IllegalArgumentException(SDOException.typeNotFound(uri, typeName));
}
public DataObject create(Class interfaceClass) {
if (interfaceClass == null) {
throw new IllegalArgumentException(SDOException.cannotPerformOperationWithNullInputParameter("create", "interfaceClass"));
}
Type type = getHelperContext().getTypeHelper().getType(interfaceClass);
if (type != null) {
return create(type);
}
// at this point the type may not have been defined or there could be a classloader issue
SDOXMLHelper xmlHelper = (SDOXMLHelper) getHelperContext().getXMLHelper();
ClassLoader contextLoader = xmlHelper.getLoader();
ClassLoader interfaceLoader = interfaceClass.getClassLoader();
boolean loadersAreRelated = false;
// check the hierarchy to see if the interface loader is a parent of the context loader
List<ClassLoader> visitedLoaders = new ArrayList<ClassLoader>();
while (contextLoader != null && !loadersAreRelated) {
if(visitedLoaders.contains(contextLoader)) {
//if we encounter a loader we've already checked, break out
break;
}
visitedLoaders.add(contextLoader);
if (contextLoader == interfaceLoader) {
loadersAreRelated = true;
}
ClassLoader parentLoader = contextLoader.getParent();
if(contextLoader == parentLoader) {
break;
}
contextLoader = parentLoader;
}
throw new IllegalArgumentException(SDOException.typeNotFoundForInterface(interfaceClass.getName(), loadersAreRelated));
}
public DataObject create(Type type) {
if (type == null) {
throw new IllegalArgumentException(SDOException.cannotPerformOperationWithNullInputParameter("create", "type"));
}
SDOType sdoType = (SDOType) type;
if (sdoType.isAbstract()) {
//throw illegal arg exception
//spec page 40
throw new IllegalArgumentException(SDOException.errorCreatingDataObjectForType(sdoType.getURI(), sdoType.getName()));
}
if(sdoType.isDataType()) {
SDOTypeHelper sth = (SDOTypeHelper) getHelperContext().getTypeHelper();
sdoType = (SDOType) sth.getWrappersHashMap().get(sdoType.getQName());
}
Class implClass;
try {
implClass = sdoType.getImplClass();
if (implClass != null) {
// initialization of the properties Map Implementation will be done in the default constructor call below
// testcase is in org.apache.tuscany.sdo.test
SDODataObject theDataObject = (SDODataObject)implClass.newInstance();
theDataObject._setType(sdoType);
theDataObject._setHelperContext(getHelperContext());
return theDataObject;
}
} catch (InstantiationException e) {
throw new IllegalArgumentException(SDOException.errorCreatingDataObjectForClass(e, (sdoType).getInstanceClassName(), sdoType.getURI(), sdoType.getName()));
} catch (IllegalAccessException e) {
throw new IllegalArgumentException(SDOException.errorCreatingDataObjectForClass(e, (sdoType).getInstanceClassName(), sdoType.getURI(), sdoType.getName()));
}
SDODataObject dataObject = new SDODataObject();
dataObject._setType(sdoType);
dataObject._setHelperContext(getHelperContext());
return dataObject;
}
/**
* INTERNAL:
* Return the current helperContext associated with this delegate.
*/
public HelperContext getHelperContext() {
return aHelperContext;
}
/**
* INTERNAL:
* Set the current helperContext to be associated with this delegate
*/
public void setHelperContext(HelperContext helperContext) {
aHelperContext = helperContext;
}
}