| /* |
| * Copyright (c) 1998, 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. |
| * |
| * 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. |
| */ |
| |
| /* @test |
| * @clean A SubstituteObjectOutputStream SubstituteObjectInputStream |
| * @bug 4099013 |
| * @summary Enable substitution of String and Array by ObjectStreams. |
| */ |
| |
| import java.io.*; |
| import java.lang.reflect.Array; |
| |
| class A implements Serializable { |
| String stringA; |
| String stringB; |
| String stringC; |
| String[] arrayOfString; |
| |
| A() { |
| stringA = "hello"; |
| stringB = "goodbye"; |
| stringC = stringA; |
| arrayOfString = new String[2]; |
| for (int i = 0; i < arrayOfString.length; i++) |
| arrayOfString[i] = new String("array element " + i); |
| } |
| |
| void report() { |
| System.out.println("stringA = " + stringA); |
| System.out.println("stringB = " + stringB); |
| System.out.println("stringC = " + stringC); |
| System.out.println("length of arrayOfString = " + |
| arrayOfString.length); |
| for (int i = 0; i < arrayOfString.length; i++) |
| System.out.println("arrayOfString[" + i + "]= " + |
| arrayOfString[i]); |
| } |
| } |
| |
| class SubstituteObjectOutputStream extends ObjectOutputStream { |
| public int numStringsReplaced = 0; |
| public int numArraysCounted = 0; |
| |
| public SubstituteObjectOutputStream(OutputStream out) throws IOException { |
| super(out); |
| enableReplaceObject(true); |
| } |
| |
| protected Object replaceObject(Object obj) throws IOException { |
| if (obj instanceof String) { |
| numStringsReplaced++; |
| return obj + "_WriteReplaced"; |
| } |
| if (obj.getClass().isArray()) { |
| Object[] array = (Object[]) obj; |
| /* Double the array. |
| * Initialize new array elements with original array. */ |
| Class arrayComponentType = array.getClass().getComponentType(); |
| Object[] newarray = |
| (Object[])Array.newInstance(arrayComponentType, |
| array.length * 2); |
| for (int i = 0; i < array.length; i++) |
| newarray[i] = array[i]; |
| for (int ni = array.length; ni < 2* array.length; ni++) |
| newarray[ni] = array[ni - array.length]; |
| numArraysCounted++; |
| obj = newarray; |
| } |
| return obj; |
| } |
| } |
| |
| class SubstituteObjectInputStream extends ObjectInputStream { |
| public int numStringsReplaced = 0; |
| public int numArraysCounted = 0; |
| |
| public SubstituteObjectInputStream(InputStream in) throws IOException { |
| super(in); |
| enableResolveObject(true); |
| } |
| |
| protected Object resolveObject(Object obj) throws IOException { |
| if (obj instanceof String) { |
| numStringsReplaced++; |
| return obj + "_ReadResolved"; |
| } |
| if (obj.getClass().isArray()) { |
| Object[] array = (Object[])obj; |
| |
| /* Double the array. |
| * Initialize new array elements with original array. */ |
| Class arrayComponentType = array.getClass().getComponentType(); |
| Object[] newarray = |
| (Object[])Array.newInstance(arrayComponentType, |
| array.length * 2); |
| for (int i = 0; i < array.length; i++) |
| newarray[i] = array[i]; |
| for (int ni = array.length; ni < 2* array.length; ni++) |
| newarray[ni] = array[ni - array.length]; |
| numArraysCounted++; |
| obj = newarray; |
| } |
| return obj; |
| } |
| } |
| |
| public class ReplaceStringArray { |
| public static void main(String args[]) throws IOException, ClassNotFoundException { |
| boolean verbose = false; |
| if (args.length >= 1 && args[0].compareTo("verbose") == 0) |
| verbose = true; |
| |
| |
| A a = new A(); |
| if (verbose) { |
| System.out.println("Value of Class A"); |
| a.report(); |
| System.out.println(""); |
| } |
| |
| |
| /* Serialize object a to bytestream. */ |
| if (verbose) { |
| System.out.println("Serialize A to SubstituteObjectOutputStream"); |
| System.out.println(""); |
| } |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| SubstituteObjectOutputStream out = new SubstituteObjectOutputStream(baos); |
| out.writeObject(a); |
| out.close(); |
| a = null; |
| |
| /* Validate that writeReplace called by SubstituteObjectOutputStream.*/ |
| boolean expectedResult = (out.numStringsReplaced == 4); |
| if (!expectedResult) |
| throw new Error("Expected " + 4 + " strings to be replaced during serialization;" + |
| " only " + out.numStringsReplaced + " strings were replaced."); |
| if (out.numArraysCounted != 1) |
| throw new Error("Expected 1 array during serialization; only " + |
| out.numArraysCounted + " arrays"); |
| |
| if (verbose) { |
| System.out.println("DeSerialize A from SubstituteObjectInputStream"); |
| System.out.println(""); |
| } |
| SubstituteObjectInputStream in = |
| new SubstituteObjectInputStream(new ByteArrayInputStream(baos.toByteArray())); |
| a = (A)in.readObject(); |
| in.close(); |
| |
| /* Validate that readResolve called by SubstituteObjectInputStream.*/ |
| if (in.numStringsReplaced != 4) |
| throw new Error("Expected 4 strings to be resolved during deserialization;" + |
| " only " + in.numStringsReplaced + " strings were resolved."); |
| if (in.numArraysCounted != 1) |
| throw new Error("Expected 1 array during deserialization; only " + |
| out.numArraysCounted + " arrays"); |
| if (a.arrayOfString.length != 8) |
| throw new Error("Expected a.arrayOfString.length to be 8, observed " + |
| a.arrayOfString.length); |
| if (verbose) { |
| System.out.println("Value of Class A after serialize/deserialize with writeReplace/readResolve"); |
| a.report(); |
| } |
| } |
| } |