/**
*
* 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.Collection;
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.xml.InterfaceMethodData;
import darks.orm.exceptions.ConfigException;
public class ForTag extends AbstractTag
{
String open;
String close;
String separator;
String collection;
String item;
public ForTag()
{
}
public ForTag(AbstractTag prevTag)
{
super(prevTag);
}
@Override
public Object computeSql(StringBuilder sqlBuf, List<Object> params, InterfaceMethodData data, Object prevValue) throws Exception
{
ExpressParam expParam = new ExpressParam(params, data);
@SuppressWarnings("unchecked")
Collection<Object> col = (Collection<Object>)expParam.getParam(collection);
int i = params.size();
sqlBuf.append(open);
for (Object obj : col)
{
params.add(obj);
String itemKey = item + i;
String key = "#" + itemKey;
data.addArgument(i, itemKey);
StringBuilder buf = new StringBuilder();
super.computeSql(buf, params, data, prevValue);
String p = buf.toString();
key = p.replace("#" + item, key).trim();
sqlBuf.append(key).append(separator);
i++;
}
if (!col.isEmpty())
{
sqlBuf.setLength(sqlBuf.length() - 1);
}
sqlBuf.append(close).append(' ');
return null;
}
@Override
public boolean parseElement(Element el)
{
open = el.attributeValue("open").trim();
close = el.attributeValue("close").trim();
separator = el.attributeValue("separator").trim();
collection = el.attributeValue("collection").trim();
item = el.attributeValue("item").trim();
if ("".equals(open))
{
throw new ConfigException("Sqlmap foreach tag's attribute 'open' is invalid.");
}
if ("".equals(close))
{
throw new ConfigException("Sqlmap foreach tag's attribute 'close' is invalid.");
}
if ("".equals(separator))
{
throw new ConfigException("Sqlmap foreach tag's attribute 'separator' is invalid.");
}
if ("".equals(collection))
{
throw new ConfigException("Sqlmap foreach tag's attribute 'collection' is invalid.");
}
if ("".equals(item))
{
throw new ConfigException("Sqlmap foreach tag's attribute 'item' is invalid.");
}
return true;
}
}