package org.nutz.dao.impl.sql.pojo;
import org.nutz.dao.Chain;
import org.nutz.dao.entity.Entity;
import org.nutz.dao.entity.MappingField;
import org.nutz.dao.jdbc.Jdbcs;
import org.nutz.dao.jdbc.ValueAdaptor;
import org.nutz.lang.Lang;
public class UpdateFieldsByChainPItem extends AbstractPItem {
private Chain chain;
public UpdateFieldsByChainPItem(Chain chain) {
this.chain = chain;
}
public void joinSql(Entity<?> en, StringBuilder sb) {
if (chain.size() > 0) {
sb.append(" SET ");
Chain c = chain.head();
while (c != null) {
sb.append(this._fmtcolnm(en, c.name()));
sb.append("=? ,");
c = c.next();
}
sb.deleteCharAt(sb.length() - 1);
sb.append(' ');
} else {
throw Lang.makeThrow("Entity chain for UPDATE '%s'", en.getType().getName());
}
}
public int joinAdaptor(Entity<?> en, ValueAdaptor[] adaptors, int off) {
Chain c = chain.head();
while (c != null) {
MappingField mf = en.getField(c.name());
// TODO 移除这种数组下标用++的写法!!!
if (c.adaptor() == null)
adaptors[off++] = (null == mf ? Jdbcs.getAdaptorBy(c.value()) : mf.getAdaptor());
else
adaptors[off++] = c.adaptor();
c = c.next();
}
return off;
}
public int joinParams(Entity<?> en, Object obj, Object[] params, int off) {
Chain c = chain.head();
while (c != null) {
params[off++] = c.value();
c = c.next();
}
return off;
}
public int paramCount(Entity<?> en) {
return chain.size();
}
}