_serializablelistdatamodel.java

一个使用struts+hibernate+spring开发的完的网站源代码。

/*
 * Copyright 2004 The Apache Software Foundation.
 * 
 * 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.apache.myfaces.component.html.ext;

import javax.faces.component.StateHolder;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

/**
 * @author Manfred Geiler (latest modification by $Author: matze $)
 * @version $Revision: 1.7 $ $Date: 2004/10/13 11:50:57 $
 * %Log$
 */
class _SerializableListDataModel
        extends _SerializableDataModel
{
    //private static final Log log = LogFactory.getLog(_SerializableDataModel.class);

    public _SerializableListDataModel(int first, int rows, List list)
    {
        _first = first;
        _rows = rows;
        _rowCount = list.size();
        if (_rows <= 0)
        {
            _rows = _rowCount - first;
        }

        if (_rows == _rowCount)
        {
            //whole list must be saved
            if (list instanceof Serializable || list instanceof StateHolder)
            {
                _list = list;
            }
            else
            {
                //copy list
                _list = new ArrayList(list);
            }
        }
        else
        {
            int size = _rows > 0 && _rows < _rowCount ? _rows : _rowCount;
            _list = new ArrayList(size);
            if (size > _rowCount - _first)
            {
                size = _rowCount - _first;
            }
            for (int i = 0; i < size; i++)
            {
                _list.add(list.get(_first + i));
            }
        }
    }
}