queryparam.java

Wicket一个开发Java Web应用程序框架。它使得开发web应用程序变得容易而轻松。 Wicket利用一个POJO data beans组件使得它可以与任何持久层技术相结合。

/*
 * 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.spring.common;


/**
 * Encapsulates the Query Paramaters to be passed to daos
 * 
 * @author Igor Vaynberg (ivaynberg)
 */
public class QueryParam
{
	private int first;

	private int count;

	private String sort;

	private boolean sortAsc;

	/**
	 * Set to return <tt>count</tt> elements, starting at the <tt>first</tt> element.
	 * 
	 * @param first
	 *            First element to return.
	 * @param count
	 *            Number of elements to return.
	 */
	public QueryParam(int first, int count)
	{
		this(first, count, null, true);
	}

	/**
	 * Set to return <tt>count</tt> sorted elements, starting at the <tt>first</tt> element.
	 * 
	 * @param first
	 *            First element to return.
	 * @param count
	 *            Number of elements to return.
	 * @param sort
	 *            Column to sort on.
	 * @param sortAsc
	 *            Sort ascending or descending.
	 */
	public QueryParam(int first, int count, String sort, boolean sortAsc)
	{
		this.first = first;
		this.count = count;
		this.sort = sort;
		this.sortAsc = sortAsc;
	}

	public int getCount()
	{
		return count;
	}

	public int getFirst()
	{
		return first;
	}

	public String getSort()
	{
		return sort;
	}

	public boolean isSortAsc()
	{
		return sortAsc;
	}

	public boolean hasSort()
	{
		return sort != null;
	}

}