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/**
*
* Copyright 2006 The Apache Software Foundation or its licensors as applicable
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tuscany.tools.xmlfromxsd.generate;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.apache.tuscany.sdo.util.SDOUtil;
import commonj.sdo.DataObject;
import commonj.sdo.Property;
import commonj.sdo.Sequence;
import commonj.sdo.Type;
import commonj.sdo.helper.CopyHelper;
import commonj.sdo.helper.DataFactory;
import commonj.sdo.helper.TypeHelper;
import commonj.sdo.helper.XMLHelper;
import commonj.sdo.helper.XSDHelper;
/**
* This class generates an XML instance given and XSD. All inputs required by this generator are
* set into the XMLFromXSDConfiguration object that is passed in the constructor. This generator
* first loads the XSD Types into the TypeHelper. Then for the XSD type for which an XML instnace
* is to be created, this generator creates SDOs which are then serialized as XML
*
*/
public class SDObasedXMLGenerator implements XMLGenerator
{
private XMLfromXSDConfiguration config = null;
private TypeHelper typeHelper = null; //SDOUtil.createTypeHelper();
private XSDHelper xsdHelper = null; //SDOUtil.createXSDHelper(typeHelper);
private XMLHelper xmlHelper = null;//SDOUtil.createXMLHelper(typeHelper);
private Hashtable complexTypesMap = new Hashtable();
DataFactory dataFactory = SDOUtil.createDataFactory(typeHelper);
public SDObasedXMLGenerator(XMLfromXSDConfiguration config)
{
this.config = config;
// config.setXsdInputStream(getClass().getResource(conf).openStream());
}
public void generateXML(XMLfromXSDConfiguration config) throws Exception
{
this.config = config;
generateXML();
}
public void generateXML() throws Exception
{
typeHelper = SDOUtil.createTypeHelper();
xsdHelper = SDOUtil.createXSDHelper(typeHelper);
if ( config != null )
{
List types = xsdHelper.define(config.getXsdInputStream(), null);
Type type = typeHelper.getType(config.getSchemaTypeNamespaceURI(),
config.getSchemaTypeName());
if ( type != null )
{
Object instance = createInstance(type, null);
if ( instance != null )
{
xmlHelper = SDOUtil.createXMLHelper(typeHelper);
xmlHelper.save((DataObject) instance,
config.getRootElementNamespaceURI(),
config.getRootElementLocalName(), config.getXmlOutputStream());
}
}
else
{
throw new IllegalArgumentException("Incorrect input of SchemaType Namespace / SchemaType to be instantiated as XML!");
}
}
else
{
throw new Exception("Generation Configuraiton not set - no instnace of XMLFromXSDConfiguration found!");
}
}
protected Object createSimpleDataObject(Type type, Object defaultValue)
{
// FIXME: We need to handle well-know simple types
//return SDOUtil.createFromString(type, "0");
try
{
return SDOUtil.createFromString(type,"");
}
catch ( NumberFormatException nfe )
{
return SDOUtil.createFromString(type,"0");
}
}
protected Object createComplexDataObject(Type type, Object defaultValue)
{
// Type references can be recursive, we need to avoid infinite loop
DataObject dataObject = (DataObject) complexTypesMap.get(type);
if (dataObject != null)
{
dataObject = CopyHelper.INSTANCE.copy((DataObject) dataObject);
} else
{
dataObject = dataFactory.create(type);
complexTypesMap.put(type, dataObject);
List properties = type.getProperties();
for ( Iterator i = properties.iterator(); i.hasNext(); )
{
Property property = (Property) i.next();
if (!property.isReadOnly())
{
if (property.isMany())
{
Object values = dataObject.get(property);
if (values instanceof Sequence)
{
// NOP
}
if (values instanceof List)
{
((List) values).add(createInstance(property
.getType(), null));
}
} else
{
dataObject.set(property, createInstance(property
.getType(), property.getDefault()));
}
}
}
}
return dataObject;
}
public Object createInstance(Type type, Object defaultValue)
{
Object dataObject = null;
if (type != null)
{
if (type.isDataType())
{
if (defaultValue != null)
{
dataObject = defaultValue;
} else
{
dataObject = createSimpleDataObject(type, defaultValue);
}
} else
{
dataObject = createComplexDataObject(type, defaultValue);
}
}
return dataObject;
}
public XMLfromXSDConfiguration getConfig()
{
return config;
}
public void setConfig(XMLfromXSDConfiguration config)
{
this.config = config;
}
}
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