feat(jdk8): move files to new folder to avoid resources compiled.
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281
jdkSrc/jdk8/javax/sql/rowset/serial/SerialJavaObject.java
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281
jdkSrc/jdk8/javax/sql/rowset/serial/SerialJavaObject.java
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/*
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* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package javax.sql.rowset.serial;
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import java.io.*;
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import java.lang.reflect.*;
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import java.util.Arrays;
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import java.util.Vector;
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import javax.sql.rowset.RowSetWarning;
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import sun.reflect.CallerSensitive;
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import sun.reflect.Reflection;
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import sun.reflect.misc.ReflectUtil;
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/**
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* A serializable mapping in the Java programming language of an SQL
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* <code>JAVA_OBJECT</code> value. Assuming the Java object
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* implements the <code>Serializable</code> interface, this class simply wraps the
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* serialization process.
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* <P>
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* If however, the serialization is not possible because
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* the Java object is not immediately serializable, this class will
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* attempt to serialize all non-static members to permit the object
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* state to be serialized.
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* Static or transient fields cannot be serialized; an attempt to serialize
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* them will result in a <code>SerialException</code> object being thrown.
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*
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* <h3> Thread safety </h3>
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*
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* A SerialJavaObject is not safe for use by multiple concurrent threads. If a
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* SerialJavaObject is to be used by more than one thread then access to the
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* SerialJavaObject should be controlled by appropriate synchronization.
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*
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* @author Jonathan Bruce
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*/
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public class SerialJavaObject implements Serializable, Cloneable {
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/**
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* Placeholder for object to be serialized.
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*/
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private Object obj;
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/**
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* Placeholder for all fields in the <code>JavaObject</code> being serialized.
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*/
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private transient Field[] fields;
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/**
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* Constructor for <code>SerialJavaObject</code> helper class.
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* <p>
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*
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* @param obj the Java <code>Object</code> to be serialized
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* @throws SerialException if the object is found not to be serializable
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*/
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public SerialJavaObject(Object obj) throws SerialException {
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// if any static fields are found, an exception
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// should be thrown
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// get Class. Object instance should always be available
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Class<?> c = obj.getClass();
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// determine if object implements Serializable i/f
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if (!(obj instanceof java.io.Serializable)) {
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setWarning(new RowSetWarning("Warning, the object passed to the constructor does not implement Serializable"));
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}
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// can only determine public fields (obviously). If
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// any of these are static, this should invalidate
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// the action of attempting to persist these fields
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// in a serialized form
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fields = c.getFields();
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if (hasStaticFields(fields)) {
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throw new SerialException("Located static fields in " +
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"object instance. Cannot serialize");
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}
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this.obj = obj;
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}
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/**
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* Returns an <code>Object</code> that is a copy of this <code>SerialJavaObject</code>
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* object.
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*
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* @return a copy of this <code>SerialJavaObject</code> object as an
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* <code>Object</code> in the Java programming language
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* @throws SerialException if the instance is corrupt
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*/
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public Object getObject() throws SerialException {
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return this.obj;
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}
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/**
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* Returns an array of <code>Field</code> objects that contains each
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* field of the object that this helper class is serializing.
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*
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* @return an array of <code>Field</code> objects
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* @throws SerialException if an error is encountered accessing
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* the serialized object
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* @throws SecurityException If a security manager, <i>s</i>, is present
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* and the caller's class loader is not the same as or an
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* ancestor of the class loader for the class of the
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* {@linkplain #getObject object} being serialized
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* and invocation of {@link SecurityManager#checkPackageAccess
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* s.checkPackageAccess()} denies access to the package
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* of that class.
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* @see Class#getFields
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*/
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@CallerSensitive
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public Field[] getFields() throws SerialException {
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if (fields != null) {
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Class<?> c = this.obj.getClass();
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SecurityManager sm = System.getSecurityManager();
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if (sm != null) {
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/*
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* Check if the caller is allowed to access the specified class's package.
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* If access is denied, throw a SecurityException.
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*/
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Class<?> caller = sun.reflect.Reflection.getCallerClass();
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if (ReflectUtil.needsPackageAccessCheck(caller.getClassLoader(),
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c.getClassLoader())) {
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ReflectUtil.checkPackageAccess(c);
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}
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}
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return c.getFields();
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} else {
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throw new SerialException("SerialJavaObject does not contain" +
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" a serialized object instance");
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}
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}
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/**
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* The identifier that assists in the serialization of this
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* <code>SerialJavaObject</code> object.
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*/
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static final long serialVersionUID = -1465795139032831023L;
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/**
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* A container for the warnings issued on this <code>SerialJavaObject</code>
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* object. When there are multiple warnings, each warning is chained to the
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* previous warning.
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*/
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Vector<RowSetWarning> chain;
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/**
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* Compares this SerialJavaObject to the specified object.
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* The result is {@code true} if and only if the argument
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* is not {@code null} and is a {@code SerialJavaObject}
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* object that is identical to this object
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*
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* @param o The object to compare this {@code SerialJavaObject} against
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*
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* @return {@code true} if the given object represents a {@code SerialJavaObject}
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* equivalent to this SerialJavaObject, {@code false} otherwise
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*
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*/
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public boolean equals(Object o) {
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if (this == o) {
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return true;
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}
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if (o instanceof SerialJavaObject) {
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SerialJavaObject sjo = (SerialJavaObject) o;
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return obj.equals(sjo.obj);
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}
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return false;
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}
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/**
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* Returns a hash code for this SerialJavaObject. The hash code for a
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* {@code SerialJavaObject} object is taken as the hash code of
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* the {@code Object} it stores
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*
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* @return a hash code value for this object.
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*/
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public int hashCode() {
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return 31 + obj.hashCode();
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}
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/**
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* Returns a clone of this {@code SerialJavaObject}.
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*
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* @return a clone of this SerialJavaObject
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*/
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public Object clone() {
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try {
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SerialJavaObject sjo = (SerialJavaObject) super.clone();
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sjo.fields = Arrays.copyOf(fields, fields.length);
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if (chain != null)
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sjo.chain = new Vector<>(chain);
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return sjo;
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} catch (CloneNotSupportedException ex) {
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// this shouldn't happen, since we are Cloneable
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throw new InternalError();
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}
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}
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/**
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* Registers the given warning.
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*/
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private void setWarning(RowSetWarning e) {
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if (chain == null) {
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chain = new Vector<>();
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}
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chain.add(e);
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}
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/**
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* readObject is called to restore the state of the {@code SerialJavaObject}
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* from a stream.
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*/
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private void readObject(ObjectInputStream s)
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throws IOException, ClassNotFoundException {
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ObjectInputStream.GetField fields1 = s.readFields();
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@SuppressWarnings("unchecked")
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Vector<RowSetWarning> tmp = (Vector<RowSetWarning>)fields1.get("chain", null);
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if (tmp != null)
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chain = new Vector<>(tmp);
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obj = fields1.get("obj", null);
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if (obj != null) {
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fields = obj.getClass().getFields();
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if(hasStaticFields(fields))
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throw new IOException("Located static fields in " +
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"object instance. Cannot serialize");
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} else {
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throw new IOException("Object cannot be null!");
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}
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}
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/**
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* writeObject is called to save the state of the {@code SerialJavaObject}
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* to a stream.
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*/
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private void writeObject(ObjectOutputStream s)
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throws IOException {
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ObjectOutputStream.PutField fields = s.putFields();
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fields.put("obj", obj);
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fields.put("chain", chain);
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s.writeFields();
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}
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/*
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* Check to see if there are any Static Fields in this object
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*/
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private static boolean hasStaticFields(Field[] fields) {
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for (Field field : fields) {
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if ( field.getModifiers() == Modifier.STATIC) {
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return true;
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}
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}
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return false;
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}
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}
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