| /* |
| * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package javax.sql.rowset.serial; |
| |
| import java.sql.*; |
| import java.io.*; |
| import java.net.URL; |
| |
| |
| /** |
| * A serialized mapping in the Java programming language of an SQL |
| * <code>DATALINK</code> value. A <code>DATALINK</code> value |
| * references a file outside of the underlying data source that the |
| * data source manages. |
| * <P> |
| * <code>RowSet</code> implementations can use the method <code>RowSet.getURL</code> |
| * to retrieve a <code>java.net.URL</code> object, which can be used |
| * to manipulate the external data. |
| * <pre> |
| * java.net.URL url = rowset.getURL(1); |
| * </pre> |
| * |
| * <h3> Thread safety </h3> |
| * |
| * A SerialDatalink is not safe for use by multiple concurrent threads. If a |
| * SerialDatalink is to be used by more than one thread then access to the |
| * SerialDatalink should be controlled by appropriate synchronization. |
| * |
| * @since 1.5 |
| */ |
| public class SerialDatalink implements Serializable, Cloneable { |
| |
| /** |
| * The extracted URL field retrieved from the DATALINK field. |
| * @serial |
| */ |
| private URL url; |
| |
| /** |
| * The SQL type of the elements in this <code>SerialDatalink</code> |
| * object. The type is expressed as one of the constants from the |
| * class <code>java.sql.Types</code>. |
| * @serial |
| */ |
| private int baseType; |
| |
| /** |
| * The type name used by the DBMS for the elements in the SQL |
| * <code>DATALINK</code> value that this SerialDatalink object |
| * represents. |
| * @serial |
| */ |
| private String baseTypeName; |
| |
| /** |
| * Constructs a new <code>SerialDatalink</code> object from the given |
| * <code>java.net.URL</code> object. |
| * |
| * @param url the {@code URL} to create the {@code SerialDataLink} from |
| * @throws SerialException if url parameter is a null |
| */ |
| public SerialDatalink(URL url) throws SerialException { |
| if (url == null) { |
| throw new SerialException("Cannot serialize empty URL instance"); |
| } |
| this.url = url; |
| } |
| |
| /** |
| * Returns a new URL that is a copy of this <code>SerialDatalink</code> |
| * object. |
| * |
| * @return a copy of this <code>SerialDatalink</code> object as a |
| * <code>URL</code> object in the Java programming language. |
| * @throws SerialException if the <code>URL</code> object cannot be de-serialized |
| */ |
| public URL getDatalink() throws SerialException { |
| |
| URL aURL = null; |
| |
| try { |
| aURL = new URL((this.url).toString()); |
| } catch (java.net.MalformedURLException e) { |
| throw new SerialException("MalformedURLException: " + e.getMessage()); |
| } |
| return aURL; |
| } |
| |
| /** |
| * Compares this {@code SerialDatalink} to the specified object. |
| * The result is {@code true} if and only if the argument is not |
| * {@code null} and is a {@code SerialDatalink} object whose URL is |
| * identical to this object's URL |
| * |
| * @param obj The object to compare this {@code SerialDatalink} against |
| * |
| * @return {@code true} if the given object represents a {@code SerialDatalink} |
| * equivalent to this SerialDatalink, {@code false} otherwise |
| * |
| */ |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof SerialDatalink) { |
| SerialDatalink sdl = (SerialDatalink) obj; |
| return url.equals(sdl.url); |
| } |
| return false; |
| } |
| |
| /** |
| * Returns a hash code for this {@code SerialDatalink}. The hash code for a |
| * {@code SerialDatalink} object is taken as the hash code of |
| * the {@code URL} it stores |
| * |
| * @return a hash code value for this object. |
| */ |
| public int hashCode() { |
| return 31 + url.hashCode(); |
| } |
| |
| /** |
| * Returns a clone of this {@code SerialDatalink}. |
| * |
| * @return a clone of this SerialDatalink |
| */ |
| public Object clone() { |
| try { |
| SerialDatalink sdl = (SerialDatalink) super.clone(); |
| return sdl; |
| } catch (CloneNotSupportedException ex) { |
| // this shouldn't happen, since we are Cloneable |
| throw new InternalError(); |
| } |
| } |
| |
| /** |
| * readObject and writeObject are called to restore the state |
| * of the {@code SerialDatalink} |
| * from a stream. Note: we leverage the default Serialized form |
| */ |
| |
| /** |
| * The identifier that assists in the serialization of this |
| * {@code SerialDatalink} object. |
| */ |
| static final long serialVersionUID = 2826907821828733626L; |
| } |