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Silk Java dependency injection framework

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/*
 *  Copyright (c) 2012, Jan Bernitt 
 *			
 *  Licensed under the Apache License, Version 2.0, http://www.apache.org/licenses/LICENSE-2.0
 */
package se.jbee.inject;

import java.util.Arrays;
import java.util.Collection;

/**
 * Silks array util.
 * 
 * @author Jan Bernitt ([email protected])
 */
public final class Array {

	public static  T[] append( T[] array, T value ) {
		T[] copy = Arrays.copyOf( array, array.length + 1 );
		copy[array.length] = value;
		return copy;
	}

	@SuppressWarnings ( "unchecked" )
	public static  T[] prepand( T value, T[] array ) {
		T[] copy = (T[]) newInstance( array.getClass().getComponentType(), array.length + 1 );
		System.arraycopy( array, 0, copy, 1, array.length );
		copy[0] = value;
		return copy;
	}

	@SuppressWarnings ( "unchecked" )
	public static  T[] newInstance( Class componentType, int length ) {
		return (T[]) java.lang.reflect.Array.newInstance( componentType, length );
	}

	@SuppressWarnings ( "unchecked" )
	public static  T[] fill( T value, int length ) {
		T[] res = (T[]) newInstance( value.getClass(), length );
		for ( int i = 0; i < res.length; i++ ) {
			res[i] = value;
		}
		return res;
	}

	public static  T[] of( Collection list, Class type ) {
		return list.toArray( newInstance( type, list.size() ) );
	}

	@SuppressWarnings ( "unchecked" )
	public static  T[] of( Collection list, T[] empty ) {
		if ( list.isEmpty() ) {
			return empty;
		}
		return of( list, (Class) empty.getClass().getComponentType() );
	}
}