org.apache.wicket.util.lang.Generics Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.wicket.util.lang;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.concurrent.ConcurrentHashMap;
/**
* Generics related utilities
*
* @author igor.vaynberg
*/
public class Generics
{
private Generics()
{
}
/**
* Silences generics warning when need to cast iterator types
*
* @param
* @param delegate
* @return delegate iterator cast to proper generics type
*/
@SuppressWarnings("unchecked")
public static Iterator iterator(final Iterator delegate)
{
return (Iterator)delegate;
}
/**
* Creates a new HashMap
*
* @param
* @param
* @return new hash map
*/
public static HashMap newHashMap()
{
return new HashMap<>();
}
/**
* Creates a new HashMap
*
* @param
* @param
* @param capacity
* initial capacity
* @return new hash map
*/
public static HashMap newHashMap(final int capacity)
{
return new HashMap<>(capacity);
}
/**
* Creates a new ArrayList
*
* @param
* @param capacity
* initial capacity
* @return array list
*/
public static ArrayList newArrayList(final int capacity)
{
return new ArrayList<>(capacity);
}
/**
* Creates a new ArrayList
*
* @param
* @return array list
*/
public static ArrayList newArrayList()
{
return new ArrayList<>();
}
/**
* Creates a new ConcurrentHashMap
*
* @param
* @param
* @return new hash map
*/
public static ConcurrentHashMap newConcurrentHashMap()
{
return new ConcurrentHashMap<>();
}
/**
* Creates a new ConcurrentHashMap
*
* @param
* @param
* @param initialCapacity
* initial capacity
* @return new hash map
*/
public static ConcurrentHashMap newConcurrentHashMap(final int initialCapacity)
{
return new ConcurrentHashMap<>(initialCapacity);
}
}