- /*
- * @(#)SerialJavaObject.java 1.6 04/05/29
- *
- * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
- * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
- */
-
- 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.
- *
- * @version 0.1
- * @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();
- return c.getFields();
- } 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);
- }
- }