collectionfactory.java

来自「java 的源代码」· Java 代码 · 共 48 行

package com.reddragon2046.base.utilities.data.util;

import com.reddragon2046.base.utilities.data.Container;
import java.util.Arrays;
import java.util.Collection;

public class CollectionFactory
{

    public CollectionFactory()
    {
    }

    public static Collection create(Class collectionClass)
    {
        try
        {
            return (Collection)collectionClass.newInstance();
        }
        catch(Exception exception)
        {
            throw new RuntimeException("Error instantiating class, " + collectionClass);
        }
    }

    public static Collection create(Class collectionClass, Object values[])
    {
        Collection c = create(collectionClass);
        c.addAll(Arrays.asList(values));
        return c;
    }

    public static Collection createCopy(Collection collection)
    {
        Collection copy = null;
        if(collection instanceof Container)
        {
            Container container = (Container)collection;
            copy = (Collection)container.clone();
        } else
        {
            copy = create(collection.getClass());
            copy.addAll(collection);
        }
        return copy;
    }
}