org.springframework.amqp.core.Declarables Maven / Gradle / Ivy
/*
* Copyright 2018-2021 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.amqp.core;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.stream.Collectors;
import org.springframework.util.Assert;
import org.springframework.util.ObjectUtils;
/**
* A collection of {@link Declarable} objects; used to declare multiple objects on the
* broker using a single bean declaration for the collection.
*
* @author Gary Russell
* @author Björn Michael
* @since 2.1
*/
public class Declarables {
private final Collection declarables = new ArrayList<>();
public Declarables(Declarable... declarables) {
if (!ObjectUtils.isEmpty(declarables)) {
this.declarables.addAll(Arrays.asList(declarables));
}
}
public Declarables(Collection declarables) {
Assert.notNull(declarables, "declarables cannot be null");
this.declarables.addAll(declarables);
}
public Collection getDeclarables() {
return this.declarables;
}
/**
* Return the elements that are instances of the provided class.
* @param The type.
* @param type the type's class.
* @return the filtered list.
* @since 2.2
*/
public List getDeclarablesByType(Class type) {
return this.declarables.stream()
.filter(type::isInstance)
.map(type::cast)
.collect(Collectors.toList());
}
@Override
public String toString() {
return "Declarables [declarables=" + this.declarables + "]";
}
}