org.n52.series.db.beans.HierarchicalEntity Maven / Gradle / Ivy
/*
* Copyright 2015-2019 52°North Initiative for Geospatial Open Source
* Software GmbH
*
* 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.n52.series.db.beans;
import java.util.LinkedHashSet;
import java.util.Set;
public abstract class HierarchicalEntity extends DescribableEntity {
public static final String PROPERTY_PARENTS = "parents";
public static final String PROPERTY_CHILDREN = "children";
private static final long serialVersionUID = -530148269689996337L;
private Set children;
private Set parents;
public void setChildren(Set children) {
this.children = children;
}
public void addChild(T child) {
if (getChildren() == null) {
setChildren(new LinkedHashSet<>());
}
this.children.add(child);
}
public Set getChildren() {
return children;
}
public void setParents(Set parents) {
this.parents = parents;
}
public void addParent(T parent) {
if (getParents() == null) {
setParents(new LinkedHashSet<>());
}
this.parents.add(parent);
}
public Set getParents() {
return parents;
}
public final boolean hasChildren() {
return getChildren() != null && !getChildren().isEmpty();
}
public final boolean hasParents() {
return getParents() != null && !getParents().isEmpty();
}
}