+
−/*
+
− * This Source Code Form is subject to the terms of the Mozilla Public
+
− * License, v. 2.0.  If a copy of the MPL was not distributed with this
+
− * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
− *
+
− * Copyright 1997 - July 2008 CWI, August 2008 - 2016 MonetDB B.V.
+
− */
+
−
+
−package nl.cwi.monetdb.jdbc;
+
−
+
−import java.sql.*;
+
−
+
−/**
+
− * A Wrapper class that implements nothing.
+
− * 
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− * This Class is used to simply provide JDBC4 Wrapper functions, for as
+
− * long as we don't really understand that they are for and what they
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− * are supposed to do.  Hence the implementations are very stupid and
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− * non-useful, ignoring any argument and claiming stuff doesn't work, or
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− * won't work out.
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− *
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− * @author Fabian Groffen
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− * @version 1.0
+
− */
+
−public class MonetWrapper implements Wrapper {
+
−	/**
+
−	 * Returns true if this either implements the interface argument or
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−	 * is directly or indirectly a wrapper for an object that does.
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−	 * Returns false otherwise. If this implements the interface then
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−	 * return true, else if this is a wrapper then return the result of
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−	 * recursively calling isWrapperFor on the wrapped object. If this
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−	 * does not implement the interface and is not a wrapper, return
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−	 * false. This method should be implemented as a low-cost operation
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−	 * compared to unwrap so that callers can use this method to avoid
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−	 * expensive unwrap calls that may fail. If this method returns true
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−	 * then calling unwrap with the same argument should succeed.
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−	 *
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−	 * @param iface a Class defining an interface.
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−	 * @return true if this implements the interface or directly or
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−	 *         indirectly wraps an object that does.
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−	 * @throws SQLException if an error occurs while determining
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−	 *         whether this is a wrapper for an object with the given
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−	 *         interface.
+
−	 */
+
−	@Override
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−	public boolean isWrapperFor(Class<?> iface) throws SQLException {
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−		return false;
+
−	}
+
−
+
−	/**
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−	 * Returns an object that implements the given interface to allow
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−	 * access to non-standard methods, or standard methods not exposed
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−	 * by the proxy. If the receiver implements the interface then the
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−	 * result is the receiver or a proxy for the receiver. If the
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−	 * receiver is a wrapper and the wrapped object implements the
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−	 * interface then the result is the wrapped object or a proxy for
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−	 * the wrapped object. Otherwise return the the result of calling
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−	 * unwrap recursively on the wrapped object or a proxy for that
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−	 * result. If the receiver is not a wrapper and does not implement
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−	 * the interface, then an SQLException is thrown.
+
−	 *
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−	 * @param iface A Class defining an interface that the result must
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−	 *        implement.
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−	 * @return an object that implements the interface. May be a proxy
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−	 *         for the actual implementing object.
+
−	 * @throws SQLException If no object found that implements the
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−	 *         interface
+
−	 */
+
−	@Override
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−	public <T> T unwrap(Class<T> iface) throws SQLException {
+
−		throw new SQLException("No object found (not implemented)", "0A000");
+
−	}
+
−}