com.phloc.commons.parent.impl.ChildrenProviderHasChildrenWithID Maven / Gradle / Ivy
/**
* Copyright (C) 2006-2015 phloc systems
* http://www.phloc.com
* office[at]phloc[dot]com
*
* 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 com.phloc.commons.parent.impl;
import java.util.Collection;
import javax.annotation.Nullable;
import com.phloc.commons.equals.EqualsUtils;
import com.phloc.commons.id.IHasID;
import com.phloc.commons.parent.IChildrenProviderWithID;
import com.phloc.commons.parent.IHasChildren;
/**
* An implementation of the {@link IChildrenProviderWithID} interface that works
* with all types that implement {@link IHasChildren} and {@link IHasID}.
*
* @author Philip Helger
* @param
* The data type of the child objects.
*/
public class ChildrenProviderHasChildrenWithID & IHasID > extends
ChildrenProviderHasChildren implements
IChildrenProviderWithID
{
@Nullable
public CHILDTYPE getChildWithID (@Nullable final CHILDTYPE aCurrent, @Nullable final KEYTYPE aID)
{
if (aCurrent != null)
{
// Get all children (if any)
final Collection aChildren = aCurrent.getChildren ();
if (aChildren != null)
for (final CHILDTYPE aChild : aChildren)
if (aChild != null && EqualsUtils.equals (aChild.getID (), aID))
return aChild;
}
return null;
}
}