[766] | 1 | /* |
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| 2 | Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. |
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| 3 | |
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| 4 | |
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| 5 | The MySQL Connector/J is licensed under the terms of the GPLv2 |
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| 6 | <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors. |
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| 7 | There are special exceptions to the terms and conditions of the GPLv2 as it is applied to |
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| 8 | this software, see the FLOSS License Exception |
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| 9 | <http://www.mysql.com/about/legal/licensing/foss-exception.html>. |
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| 10 | |
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| 11 | This program is free software; you can redistribute it and/or modify it under the terms |
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| 12 | of the GNU General Public License as published by the Free Software Foundation; version 2 |
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| 13 | of the License. |
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| 14 | |
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| 15 | This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; |
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| 16 | without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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| 17 | See the GNU General Public License for more details. |
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| 18 | |
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| 19 | You should have received a copy of the GNU General Public License along with this |
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| 20 | program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth |
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| 21 | Floor, Boston, MA 02110-1301 USA |
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| 22 | |
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| 23 | */ |
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| 24 | |
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| 25 | package com.mysql.jdbc; |
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| 26 | |
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| 27 | import java.sql.ResultSet; |
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| 28 | import java.sql.RowIdLifetime; |
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| 29 | import java.sql.SQLException; |
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| 30 | import java.sql.Types; |
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| 31 | import java.util.ArrayList; |
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| 32 | |
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| 33 | import java.util.List; |
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| 34 | |
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| 35 | public class JDBC4DatabaseMetaDataUsingInfoSchema extends DatabaseMetaDataUsingInfoSchema { |
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| 36 | public JDBC4DatabaseMetaDataUsingInfoSchema(MySQLConnection connToSet, String databaseToSet) throws SQLException { |
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| 37 | super(connToSet, databaseToSet); |
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| 38 | } |
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| 39 | |
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| 40 | public RowIdLifetime getRowIdLifetime() throws SQLException { |
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| 41 | return RowIdLifetime.ROWID_UNSUPPORTED; |
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| 42 | } |
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| 43 | |
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| 44 | /** |
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| 45 | * Returns true if this either implements the interface argument or is directly or indirectly a wrapper |
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| 46 | * for an object that does. Returns false otherwise. If this implements the interface then return true, |
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| 47 | * else if this is a wrapper then return the result of recursively calling <code>isWrapperFor</code> on the wrapped |
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| 48 | * object. If this does not implement the interface and is not a wrapper, return false. |
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| 49 | * This method should be implemented as a low-cost operation compared to <code>unwrap</code> so that |
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| 50 | * callers can use this method to avoid expensive <code>unwrap</code> calls that may fail. If this method |
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| 51 | * returns true then calling <code>unwrap</code> with the same argument should succeed. |
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| 52 | * |
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| 53 | * @param interfaces a Class defining an interface. |
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| 54 | * @return true if this implements the interface or directly or indirectly wraps an object that does. |
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| 55 | * @throws java.sql.SQLException if an error occurs while determining whether this is a wrapper |
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| 56 | * for an object with the given interface. |
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| 57 | * @since 1.6 |
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| 58 | */ |
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| 59 | public boolean isWrapperFor(Class<?> iface) throws SQLException { |
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| 60 | // This works for classes that aren't actually wrapping |
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| 61 | // anything |
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| 62 | return iface.isInstance(this); |
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| 63 | } |
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| 64 | |
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| 65 | /** |
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| 66 | * Returns an object that implements the given interface to allow access to non-standard methods, |
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| 67 | * or standard methods not exposed by the proxy. |
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| 68 | * The result may be either the object found to implement the interface or a proxy for that object. |
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| 69 | * If the receiver implements the interface then that is the object. If the receiver is a wrapper |
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| 70 | * and the wrapped object implements the interface then that is the object. Otherwise the object is |
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| 71 | * the result of calling <code>unwrap</code> recursively on the wrapped object. If the receiver is not a |
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| 72 | * wrapper and does not implement the interface, then an <code>SQLException</code> is thrown. |
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| 73 | * |
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| 74 | * @param iface A Class defining an interface that the result must implement. |
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| 75 | * @return an object that implements the interface. May be a proxy for the actual implementing object. |
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| 76 | * @throws java.sql.SQLException If no object found that implements the interface |
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| 77 | * @since 1.6 |
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| 78 | */ |
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| 79 | public <T> T unwrap(java.lang.Class<T> iface) throws java.sql.SQLException { |
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| 80 | try { |
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| 81 | // This works for classes that aren't actually wrapping |
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| 82 | // anything |
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| 83 | return iface.cast(this); |
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| 84 | } catch (ClassCastException cce) { |
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| 85 | throw SQLError.createSQLException("Unable to unwrap to " + iface.toString(), |
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| 86 | SQLError.SQL_STATE_ILLEGAL_ARGUMENT, this.conn.getExceptionInterceptor()); |
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| 87 | } |
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| 88 | } |
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| 89 | |
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| 90 | protected int getJDBC4FunctionNoTableConstant() { |
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| 91 | return functionNoTable; |
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| 92 | } |
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| 93 | } |
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