| /* |
| * Copyright (c) 2003, 2006, 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.util.Map; |
| import java.lang.reflect.*; |
| import javax.sql.rowset.RowSetWarning; |
| |
| /** |
| * A serializable mapping in the Java programming language of an SQL |
| * <code>JAVA_OBJECT</code> value. Assuming the Java object |
| * implements the <code>Serializable</code> interface, this class simply wraps the |
| * serialization process. |
| * <P> |
| * If however, the serialization is not possible because |
| * the Java object is not immediately serializable, this class will |
| * attempt to serialize all non-static members to permit the object |
| * state to be serialized. |
| * Static or transient fields cannot be serialized; an attempt to serialize |
| * them will result in a <code>SerialException</code> object being thrown. |
| * |
| * @author Jonathan Bruce |
| */ |
| public class SerialJavaObject implements Serializable, Cloneable { |
| |
| /** |
| * Placeholder for object to be serialized. |
| */ |
| private Object obj; |
| |
| |
| /** |
| * Placeholder for all fields in the <code>JavaObject</code> being serialized. |
| */ |
| private transient Field[] fields; |
| |
| /** |
| * Constructor for <code>SerialJavaObject</code> helper class. |
| * <p> |
| * |
| * @param obj the Java <code>Object</code> to be serialized |
| * @throws SerialException if the object is found |
| * to be unserializable |
| */ |
| public SerialJavaObject(Object obj) throws SerialException { |
| |
| // if any static fields are found, an exception |
| // should be thrown |
| |
| |
| // get Class. Object instance should always be available |
| Class c = obj.getClass(); |
| |
| // determine if object implements Serializable i/f |
| boolean serializableImpl = false; |
| Class[] theIf = c.getInterfaces(); |
| for (int i = 0; i < theIf.length; i++) { |
| String ifName = theIf[i].getName(); |
| if (ifName == "java.io.Serializable") { |
| serializableImpl = true; |
| } |
| } |
| |
| // can only determine public fields (obviously). If |
| // any of these are static, this should invalidate |
| // the action of attempting to persist these fields |
| // in a serialized form |
| |
| boolean anyStaticFields = false; |
| fields = c.getFields(); |
| //fields = new Object[field.length]; |
| |
| for (int i = 0; i < fields.length; i++ ) { |
| if ( fields[i].getModifiers() == Modifier.STATIC ) { |
| anyStaticFields = true; |
| } |
| //fields[i] = field[i].get(obj); |
| } |
| try { |
| if (!(serializableImpl)) { |
| throw new RowSetWarning("Test"); |
| } |
| } catch (RowSetWarning w) { |
| setWarning(w); |
| } |
| |
| if (anyStaticFields) { |
| throw new SerialException("Located static fields in " + |
| "object instance. Cannot serialize"); |
| } |
| |
| this.obj = obj; |
| } |
| |
| /** |
| * Returns an <code>Object</code> that is a copy of this <code>SerialJavaObject</code> |
| * object. |
| * |
| * @return a copy of this <code>SerialJavaObject</code> object as an |
| * <code>Object</code> in the Java programming language |
| * @throws SerialException if the instance is corrupt |
| */ |
| public Object getObject() throws SerialException { |
| return this.obj; |
| } |
| |
| /** |
| * Returns an array of <code>Field</code> objects that contains each |
| * field of the object that this helper class is serializing. |
| * |
| * @return an array of <code>Field</code> objects |
| * @throws SerialException if an error is encountered accessing |
| * the serialized object |
| */ |
| public Field[] getFields() throws SerialException { |
| if (fields != null) { |
| Class c = this.obj.getClass(); |
| //the following has to be commented before mustang integration |
| //return c.getFields(); |
| //the following has to be uncommented before mustang integration |
| return sun.reflect.misc.FieldUtil.getFields(c); |
| } else { |
| throw new SerialException("SerialJavaObject does not contain" + |
| " a serialized object instance"); |
| } |
| } |
| |
| /** |
| * The identifier that assists in the serialization of this |
| * <code>SerialJavaObject</code> object. |
| */ |
| static final long serialVersionUID = -1465795139032831023L; |
| |
| /** |
| * A container for the warnings issued on this <code>SerialJavaObject</code> |
| * object. When there are multiple warnings, each warning is chained to the |
| * previous warning. |
| */ |
| java.util.Vector chain; |
| |
| /** |
| * Registers the given warning. |
| */ |
| private void setWarning(RowSetWarning e) { |
| if (chain == null) { |
| chain = new java.util.Vector(); |
| } |
| chain.add(e); |
| } |
| } |