package org.nutz.dao.impl.link;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.nutz.dao.entity.Entity;
import org.nutz.dao.entity.LinkField;
import org.nutz.dao.impl.AbstractLinkVisitor;
import org.nutz.dao.sql.Pojo;
import org.nutz.dao.sql.PojoCallback;
import org.nutz.dao.util.Pojos;
import org.nutz.lang.Each;
import org.nutz.lang.ExitLoop;
import org.nutz.lang.Lang;
import org.nutz.lang.LoopException;
public class DoInsertLinkVisitor extends AbstractLinkVisitor {
public void visit(final Object obj, final LinkField lnk) {
final Object value = lnk.getValue(obj);
if (Lang.length(value) == 0)
return;
// 从宿主对象更新关联对象
opt.add(Pojos.createRun(new PojoCallback() {
public Object invoke(Connection conn, ResultSet rs, Pojo pojo) throws SQLException {
lnk.updateLinkedField(obj, value);
return pojo.getOperatingObject();
}
}).setOperatingObject(obj));
// 为其循环生成插入语句 : holder.getEntityBy 会考虑到集合和数组的情况的
final Entity<?> en = lnk.getLinkedEntity();
Lang.each(value, new Each<Object>() {
public void invoke(int i, Object ele, int length) throws ExitLoop, LoopException {
if (ele == null)
throw new NullPointerException("null ele in linked field!!");
// 执行插入
opt.addInsert(en, ele);
// 更新字段
opt.add(Pojos.createRun(new PojoCallback() {
public Object invoke(Connection conn, ResultSet rs, Pojo pojo)
throws SQLException {
lnk.saveLinkedField(obj, pojo.getOperatingObject());
return pojo.getOperatingObject();
}
}).setOperatingObject(ele));
}
});
}
}