/*
* Copyright 1999-2015 dangdang.com.
* <p>
* 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.
* </p>
*/
package com.dangdang.ddframe.rdb.sharding.merger.resultset.memory.row;
import com.google.common.base.Preconditions;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
/**
* 结果集数据行抽象类.
*
* @author gaohongtao
* @author zhangliang
*/
public abstract class AbstractResultSetRow implements ResultSetRow {
private final Object[] rowData;
public AbstractResultSetRow(final ResultSet resultSet) throws SQLException {
rowData = loadData(resultSet);
}
private Object[] loadData(final ResultSet resultSet) throws SQLException {
ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
Object[] result = new Object[resultSetMetaData.getColumnCount()];
for (int i = 0; i < resultSetMetaData.getColumnCount(); i++) {
result[i] = resultSet.getObject(i + 1);
}
return result;
}
@Override
public final void setCell(final int columnIndex, final Object value) {
Preconditions.checkArgument(inRange(columnIndex));
rowData[columnIndex - 1] = value;
}
@Override
public final Object getCell(final int columnIndex) {
Preconditions.checkArgument(inRange(columnIndex));
return rowData[columnIndex - 1];
}
@Override
public final boolean inRange(final int columnIndex) {
return columnIndex > 0 && columnIndex < rowData.length + 1;
}
}