/*
Copyright (c) 2008  Franklin Schmidt <fschmidt@gmail.com>

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

package fschmidt.db.base;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Connection;
import java.sql.Statement;
import java.util.Collection;
import java.util.Iterator;
import fschmidt.db.DbKey;
import fschmidt.db.DbKeySetter;
import fschmidt.db.DbObject;
import fschmidt.db.LongKey;
import fschmidt.db.DbArcana;
import fschmidt.db.DbRecord;


class LongKeySetter implements DbKeySetter<LongKey> {
	protected final String fieldName;

	public LongKeySetter(String fieldName) {
		this.fieldName = fieldName;
	}

	public PreparedStatement prepareStatement(Connection con,LongKey key,String sql,int keyIndex)
		throws SQLException
	{
		PreparedStatement stmt = con.prepareStatement(
			sql + " where " + fieldName + "=?"
		);
		stmt.setLong(keyIndex,((LongKey)key).value());
		return stmt;
	}

	public PreparedStatement prepareStatement(Connection con,Collection<LongKey> keys,String sql,DbArcana dbArcana)
		throws SQLException
	{
		StringBuilder buf = new StringBuilder();
		buf.append( sql );
		buf.append( " where " );
		buf.append( fieldName );
		buf.append( " in (" );
		Iterator<LongKey> iter = keys.iterator();
		buf.append( iter.next().value() );
		while( iter.hasNext() ) {
			buf.append( ',' ).append( iter.next().value() );
		}
		buf.append( ")" );
		return con.prepareStatement(buf.toString());
	}

	public LongKey refreshKeyAfterInsert(Connection con,DbRecord<LongKey,? extends DbObject> record) throws SQLException {
		if( record.fields().containsKey(fieldName) ) {
			Long key = (Long)record.fields().get(fieldName);
			return new LongKey(key);
		}
		Statement stmt = con.createStatement();
		ResultSet rs = stmt.executeQuery(
			"select " + record.getDbTable().getDbDatabase().arcana().getLastSeqValFn() + " as id"
		);
		rs.next();
		LongKey key = new LongKey( rs.getLong("id") );
		rs.close();
		stmt.close();
		return key;
	}

	public LongKey getKey(ResultSet rs)
		throws SQLException
	{
		return new LongKey(rs.getLong(fieldName));
	}

	public LongKey getKey(ResultSet rs,String tableName)
		throws SQLException
	{
		return new LongKey(rs.getLong(tableName+'.'+fieldName));
	}
}