org.springframework.boot.context.properties.bind.CollectionBinder Maven / Gradle / Ivy
/*
* Copyright 2012-2019 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
*
* https://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.util.Collection;
import java.util.List;
import java.util.function.Supplier;
import org.springframework.boot.context.properties.bind.Binder.Context;
import org.springframework.boot.context.properties.source.ConfigurationPropertyName;
import org.springframework.core.CollectionFactory;
import org.springframework.core.ResolvableType;
/**
* {@link AggregateBinder} for collections.
*
* @author Phillip Webb
* @author Madhura Bhave
*/
class CollectionBinder extends IndexedElementsBinder> {
CollectionBinder(Context context) {
super(context);
}
@Override
protected Object bindAggregate(ConfigurationPropertyName name, Bindable target,
AggregateElementBinder elementBinder) {
Class collectionType = (target.getValue() != null) ? List.class : target.getType().resolve(Object.class);
ResolvableType aggregateType = ResolvableType.forClassWithGenerics(List.class,
target.getType().asCollection().getGenerics());
ResolvableType elementType = target.getType().asCollection().getGeneric();
IndexedCollectionSupplier result = new IndexedCollectionSupplier(
() -> CollectionFactory.createCollection(collectionType, elementType.resolve(), 0));
bindIndexed(name, target, elementBinder, aggregateType, elementType, result);
if (result.wasSupplied()) {
return result.get();
}
return null;
}
@Override
protected Collection