/**
*
* Copyright 2014 The Darks ORM Project (Liu lihua)
*
* 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 darks.orm.core.data.tags.impl;
import java.util.LinkedList;
import java.util.List;
import org.dom4j.Element;
import darks.orm.core.data.tags.AbstractTag;
import darks.orm.core.data.tags.express.ExpressParam;
import darks.orm.core.data.tags.express.RPNCompute;
import darks.orm.core.data.tags.express.RPNParser;
import darks.orm.core.data.xml.InterfaceMethodData;
public class IfTag extends AbstractTag
{
String condition;
LinkedList<String> conditionList;
static RPNCompute compute = new RPNCompute();
public IfTag()
{
}
public IfTag(AbstractTag prevTag)
{
super(prevTag);
}
@Override
public boolean parseElement(Element el) throws Exception
{
condition = el.attributeValue("test").trim();
boolean suc = !"".equals(condition);
if (suc)
{
RPNParser parser = new RPNParser();
conditionList = parser.parse(condition);
}
return suc && conditionList != null;
}
@Override
public Object computeSql(StringBuilder sqlBuf, List<Object> params, InterfaceMethodData data, Object prevValue) throws Exception
{
ExpressParam expParam = new ExpressParam(params, data);
boolean ret = (Boolean)compute.compute(conditionList, expParam);
if (ret)
{
super.computeSql(sqlBuf, params, data, prevValue);
}
return ret;
}
public String getCondition()
{
return condition;
}
public void setCondition(String condition)
{
this.condition = condition;
}
@Override
public String toString()
{
return "IfTag [condition=" + condition + ", childrenTags=" + childrenTags + "]";
}
}