/*
* Copyright 2012 JBoss Inc
*
* 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.drools.ide.common.server.util;
import java.util.Collection;
import org.drools.ide.common.client.modeldriven.brl.DSLVariableValue;
import com.thoughtworks.xstream.converters.UnmarshallingContext;
import com.thoughtworks.xstream.converters.collections.CollectionConverter;
import com.thoughtworks.xstream.io.HierarchicalStreamReader;
import com.thoughtworks.xstream.mapper.Mapper;
/**
* This XStream converter converts legacy String DSL values into
* DSLVariableValue objects. XStream blindly unmarshalls members of a Collection
* according to their persisted XML type. For legacy DSLSentences this is a
* String whereas for newer (and correctly) it is DSLVariableValue.
*/
public class DSLVariableValuesConverter extends CollectionConverter {
public DSLVariableValuesConverter(Mapper mapper) {
super( mapper );
}
@Override
@SuppressWarnings({"rawtypes", "unchecked"})
protected void addCurrentElementToCollection(HierarchicalStreamReader reader,
UnmarshallingContext context,
Collection collection,
Collection target) {
Object item = readItem( reader,
context,
collection );
if ( item instanceof DSLVariableValue ) {
target.add( item );
} else if ( item instanceof String ) {
//The only other possible legacy type is a String, so using toString() should be OK
DSLVariableValue value = new DSLVariableValue( item.toString() );
target.add( value );
}
}
}