/*
* Copyright 2012-2017 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.springframework.boot.context.properties.bind;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.List;
import org.springframework.boot.context.properties.source.ConfigurationPropertyName;
import org.springframework.core.ResolvableType;
/**
* {@link AggregateBinder} for arrays.
*
* @author Phillip Webb
* @author Madhura Bhave
*/
class ArrayBinder extends IndexedElementsBinder<Object> {
ArrayBinder(BindContext context) {
super(context);
}
@Override
protected Object bind(ConfigurationPropertyName name, Bindable<?> target,
AggregateElementBinder elementBinder, Class<?> type) {
IndexedCollectionSupplier collection = new IndexedCollectionSupplier(
ArrayList::new);
ResolvableType elementType = target.getType().getComponentType();
bindIndexed(name, target, elementBinder, collection, target.getType(),
elementType);
if (collection.wasSupplied()) {
List<Object> list = (List<Object>) collection.get();
Object array = Array.newInstance(elementType.resolve(), list.size());
for (int i = 0; i < list.size(); i++) {
Array.set(array, i, list.get(i));
}
return array;
}
return null;
}
@Override
protected Object merge(Object existing, Object additional) {
return additional;
}
}