/**
* Copyright 2008 biaoping.yin
*
* 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 com.frameworkset.common.tag.pager.tags;
import java.lang.reflect.Array;
import java.util.Collection;
import java.util.Map;
/**
* <p>EmptyTag.java</p>
* <p> Description: 判断指定的字段的值是否是null或者是空串，如果条件成立，则执行标签体得逻辑</p>
* <p> bboss workgroup </p>
* <p> Copyright (c) 2009 </p>
*
* @Date 2011-5-26
* @author biaoping.yin
* @version 1.0
*/
public class EmptyTag extends MatchTag
{
@Override
protected boolean match()
{
if(this.actualValue == null )
return true;
if(actualValue instanceof String )
{
if(this.actualValue.equals(""))
return true;
else
return false;
}
else if(actualValue instanceof Collection )
{
if(((Collection)actualValue).size() == 0)
return true;
else
return false;
}
else if(actualValue instanceof Map )
{
if( ((Map)actualValue).size() == 0)
return true;
else
return false;
}
else if(actualValue instanceof com.frameworkset.util.ListInfo)
{
com.frameworkset.util.ListInfo listinfo = (com.frameworkset.util.ListInfo)actualValue;
if(listinfo.getTotalSize() <= 0 )
{
if(listinfo.getSize() <= 0)
return true;
else
return false;
}
else
return false;
}
else if(actualValue.getClass().isArray())
{
int length = Array.getLength(actualValue);
if(length <= 0)
{
return true;
}
else
return false;
}
else
{
return false;
}
}
}