/*
* Copyright 2011 the original author or authors.
*
* 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.modelmapper.internal.converter;
import java.lang.reflect.ParameterizedType;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
import org.modelmapper.internal.util.Iterables;
import org.modelmapper.internal.util.TypeResolver;
import org.modelmapper.internal.util.TypeResolver.Unknown;
import org.modelmapper.internal.util.Types;
import org.modelmapper.spi.Mapping;
import org.modelmapper.spi.MappingContext;
import org.modelmapper.spi.PropertyInfo;
import org.modelmapper.spi.PropertyMapping;
/**
* Converts {@link Collection} and array instances to {@link Collection} instances.
*
* @author Jonathan Halterman
*/
class CollectionConverter extends IterableConverter<Object, Collection<Object>> {
public MatchResult match(Class<?> sourceType, Class<?> destinationType) {
return Iterables.isIterable(sourceType) && Collection.class.isAssignableFrom(destinationType) ? MatchResult.FULL
: MatchResult.NONE;
}
@Override
protected Collection<Object> createDestination(
MappingContext<Object, Collection<Object>> context, int length) {
if (context.getDestinationType().isInterface())
if (Set.class.isAssignableFrom(context.getDestinationType()))
return new HashSet<Object>();
else
return new ArrayList<Object>(length);
return context.getMappingEngine().createDestination(context);
}
@Override
protected Class<?> getElementType(MappingContext<Object, Collection<Object>> context) {
Mapping mapping = context.getMapping();
if (mapping instanceof PropertyMapping) {
PropertyInfo destInfo = ((PropertyMapping) mapping).getLastDestinationProperty();
Class<?> elementType = TypeResolver.resolveArgument(destInfo.getGenericType(),
destInfo.getInitialType());
return elementType == Unknown.class ? Object.class : elementType;
} else if (context.getGenericDestinationType() instanceof ParameterizedType)
return Types.rawTypeFor(((ParameterizedType) context.getGenericDestinationType()).getActualTypeArguments()[0]);
return Object.class;
}
@Override
protected void setElement(Collection<Object> destination, Object element, int index) {
destination.add(element);
}
}