/*
* 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.jdbc;
import com.dangdang.ddframe.rdb.sharding.jdbc.unsupported.AbstractUnsupportedGeneratedKeysResultSet;
import com.google.common.base.Preconditions;
import com.google.common.collect.Table;
import com.google.common.collect.TreeBasedTable;
import lombok.RequiredArgsConstructor;
import java.math.BigDecimal;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.HashMap;
import java.util.Map;
/**
* 生成键结果集.
*
* @author gaohongtao
*/
@RequiredArgsConstructor
public class GeneratedKeysResultSet extends AbstractUnsupportedGeneratedKeysResultSet {
private final Table<Integer, Integer, Object> valueTable;
private final Map<String, Integer> columnNameToIndexMap;
private final Statement statement;
private boolean isClosed;
private int rowIndex = -1;
public GeneratedKeysResultSet() {
valueTable = TreeBasedTable.create();
columnNameToIndexMap = new HashMap<>();
statement = null;
isClosed = true;
}
@Override
public boolean isClosed() throws SQLException {
return isClosed;
}
@Override
public boolean next() throws SQLException {
if (isClosed()) {
return false;
}
rowIndex++;
return rowIndex + 1 <= valueTable.rowKeySet().size();
}
@Override
public void close() throws SQLException {
isClosed = true;
}
@Override
public ResultSetMetaData getMetaData() throws SQLException {
checkState();
return new GeneratedKeysResultSetMetaData(valueTable, columnNameToIndexMap);
}
@Override
public boolean wasNull() throws SQLException {
checkState();
return false;
}
@Override
public String getString(final int columnIndex) throws SQLException {
checkState();
return valueTable.get(rowIndex, columnIndex - 1).toString();
}
@Override
public String getString(final String columnLabel) throws SQLException {
checkState();
return valueTable.get(rowIndex, findColumn(columnLabel)).toString();
}
@Override
public byte getByte(final int columnIndex) throws SQLException {
checkState();
return getNumberValue(columnIndex - 1).byteValue();
}
@Override
public byte getByte(final String columnLabel) throws SQLException {
checkState();
return getNumberValue(findColumn(columnLabel)).byteValue();
}
@Override
public short getShort(final int columnIndex) throws SQLException {
checkState();
return getNumberValue(columnIndex - 1).shortValue();
}
@Override
public short getShort(final String columnLabel) throws SQLException {
checkState();
return getNumberValue(findColumn(columnLabel)).shortValue();
}
@Override
public int getInt(final int columnIndex) throws SQLException {
checkState();
return getNumberValue(columnIndex - 1).intValue();
}
@Override
public int getInt(final String columnLabel) throws SQLException {
checkState();
return getNumberValue(findColumn(columnLabel)).intValue();
}
@Override
public long getLong(final int columnIndex) throws SQLException {
checkState();
return getNumberValue(columnIndex - 1).longValue();
}
@Override
public long getLong(final String columnLabel) throws SQLException {
checkState();
return getNumberValue(findColumn(columnLabel)).longValue();
}
@Override
public float getFloat(final int columnIndex) throws SQLException {
checkState();
return getNumberValue(columnIndex - 1).floatValue();
}
@Override
public float getFloat(final String columnLabel) throws SQLException {
checkState();
return getNumberValue(findColumn(columnLabel)).floatValue();
}
@Override
public double getDouble(final int columnIndex) throws SQLException {
checkState();
return getNumberValue(columnIndex - 1).doubleValue();
}
@Override
public double getDouble(final String columnLabel) throws SQLException {
checkState();
return getNumberValue(findColumn(columnLabel)).doubleValue();
}
@Override
public BigDecimal getBigDecimal(final int columnIndex, final int scale) throws SQLException {
checkState();
return new BigDecimal(getNumberValue(columnIndex - 1).longValue()).setScale(scale, BigDecimal.ROUND_HALF_UP);
}
@Override
public BigDecimal getBigDecimal(final String columnLabel, final int scale) throws SQLException {
checkState();
return new BigDecimal(getNumberValue(findColumn(columnLabel)).longValue()).setScale(scale, BigDecimal.ROUND_HALF_UP);
}
@Override
public BigDecimal getBigDecimal(final int columnIndex) throws SQLException {
checkState();
return new BigDecimal(getNumberValue(columnIndex - 1).longValue());
}
@Override
public BigDecimal getBigDecimal(final String columnLabel) throws SQLException {
checkState();
return new BigDecimal(getNumberValue(findColumn(columnLabel)).longValue());
}
private Number getNumberValue(final int columnIndex) {
Object value = valueTable.get(rowIndex, columnIndex);
Preconditions.checkState(value instanceof Number);
return (Number) value;
}
@Override
public byte[] getBytes(final int columnIndex) throws SQLException {
checkState();
return getString(columnIndex).getBytes();
}
@Override
public byte[] getBytes(final String columnLabel) throws SQLException {
checkState();
return getString(columnLabel).getBytes();
}
@Override
public Object getObject(final int columnIndex) throws SQLException {
checkState();
return valueTable.get(rowIndex, columnIndex - 1);
}
@Override
public Object getObject(final String columnLabel) throws SQLException {
checkState();
return valueTable.get(rowIndex, findColumn(columnLabel));
}
@Override
public int findColumn(final String columnLabel) throws SQLException {
checkState();
return columnNameToIndexMap.get(columnLabel);
}
@Override
public int getType() throws SQLException {
checkState();
return TYPE_FORWARD_ONLY;
}
@Override
public int getConcurrency() throws SQLException {
checkState();
return CONCUR_READ_ONLY;
}
@Override
public Statement getStatement() throws SQLException {
checkState();
return statement;
}
private void checkState() throws SQLException {
Preconditions.checkState(!isClosed(), "ResultSet has closed");
}
}