Mega Code Archive
Add new value, which sets as the first value, to existing array
<![CDATA[
/*
* Copyright 2008-2009 the T2 Project ant the Others.
*
* 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.t2framework.commons.util;
import java.lang.reflect.Array;
/**
* ArrayUtil is an utility class for processing array.
*
* @author shot
*/
public class ArrayUtil {
/**
* Add new value, which sets as the first value, to existing array.
*
* @param <T>
* @param current
* @param value
* @return
*/
@SuppressWarnings("unchecked")
public static <T> T[] addFirst(T[] current, T value) {
T[] newone = (T[]) Array.newInstance(current.getClass()
.getComponentType(), current.length + 1);
copy(current, newone, 0, 1, current.length);
newone[0] = value;
return newone;
}
/**
* Copy array with from and to position.
*
* @param <T>
* @param from
* @param to
* @param fromPos
* @param toPos
* @param length
* @return
*/
public static <T> T[] copy(T[] from, T[] to, int fromPos, int toPos,
int length) {
System.arraycopy(from, fromPos, to, toPos, length);
return to;
}
}
]]>