| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| package org.apache.openjpa.jdbc.kernel; |
| |
| import java.sql.ResultSet; |
| import java.sql.ResultSetMetaData; |
| import java.sql.SQLException; |
| |
| import org.apache.openjpa.jdbc.meta.JavaSQLTypes; |
| import org.apache.openjpa.jdbc.sql.ResultSetResult; |
| import org.apache.openjpa.jdbc.sql.SQLExceptions; |
| import org.apache.openjpa.kernel.ResultPacker; |
| import org.apache.openjpa.lib.rop.ResultObjectProvider; |
| import org.apache.openjpa.util.StoreException; |
| import org.apache.openjpa.util.UnsupportedException; |
| import serp.util.Numbers; |
| |
| /** |
| * Provides all column data in a {@link ResultSet}. |
| * |
| * @author Abe White |
| */ |
| class SQLProjectionResultObjectProvider |
| implements ResultObjectProvider { |
| |
| private final JDBCStore _store; |
| private final JDBCFetchConfiguration _fetch; |
| private final ResultSetResult _res; |
| private final ResultPacker _packer; |
| private final int _cols; |
| |
| /** |
| * Constructor. |
| * |
| * @param res the result data |
| * @param cls the result class; may be null for the default |
| */ |
| public SQLProjectionResultObjectProvider(JDBCStore store, |
| JDBCFetchConfiguration fetch, ResultSetResult res, Class cls) |
| throws SQLException { |
| _store = store; |
| _fetch = fetch; |
| |
| ResultSetMetaData meta = res.getResultSet().getMetaData(); |
| _res = res; |
| _cols = meta.getColumnCount(); |
| |
| if (cls != null) { |
| String[] aliases = new String[_cols]; |
| for (int i = 0; i < _cols; i++) |
| aliases[i] = meta.getColumnLabel(i + 1); |
| _packer = new ResultPacker(null, aliases, cls); |
| } else |
| _packer = null; |
| } |
| |
| public boolean supportsRandomAccess() { |
| try { |
| return _res.supportsRandomAccess(); |
| } catch (Throwable t) { |
| return false; |
| } |
| } |
| |
| public void open() { |
| } |
| |
| public Object getResultObject() |
| throws SQLException { |
| if (_cols == 1) { |
| Object val = _res.getObject(Numbers.valueOf(1), |
| JavaSQLTypes.JDBC_DEFAULT, null); |
| return (_packer == null) ? val : _packer.pack(val); |
| } |
| |
| Object[] vals = new Object[_cols]; |
| for (int i = 0; i < vals.length; i++) |
| vals[i] = _res.getObject(Numbers.valueOf(i + 1), |
| JavaSQLTypes.JDBC_DEFAULT, null); |
| return (_packer == null) ? vals : _packer.pack(vals); |
| } |
| |
| public boolean next() |
| throws SQLException { |
| return _res.next(); |
| } |
| |
| public boolean absolute(int pos) |
| throws SQLException { |
| return _res.absolute(pos); |
| } |
| |
| public int size() |
| throws SQLException { |
| if (_fetch.getLRSSize() == LRSSizes.SIZE_UNKNOWN |
| || !supportsRandomAccess()) |
| return Integer.MAX_VALUE; |
| return _res.size(); |
| } |
| |
| public void reset() { |
| throw new UnsupportedException(); |
| } |
| |
| public void close() { |
| _res.close(); |
| } |
| |
| public void handleCheckedException(Exception e) { |
| if (e instanceof SQLException) |
| throw SQLExceptions.getStore((SQLException) e, |
| _store.getDBDictionary()); |
| throw new StoreException(e); |
| } |
| } |