The version of Apache log4j used by SoundHelix.
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SerializationTestHelper.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.log4j.util;
import junit.framework.TestCase;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
/**
* Utiities for serialization tests.
*
* @author Curt Arnold
*/
public class SerializationTestHelper {
/**
* Private constructor.
*/
private SerializationTestHelper() {
}
/**
* Creates a clone by serializing object and
* deserializing byte stream.
* @param obj object to serialize and deserialize.
* @return clone
* @throws IOException on IO error.
* @throws ClassNotFoundException if class not found.
*/
public static Object serializeClone(final Object obj)
throws IOException, ClassNotFoundException {
ByteArrayOutputStream memOut = new ByteArrayOutputStream();
ObjectOutputStream objOut = new ObjectOutputStream(memOut);
objOut.writeObject(obj);
objOut.close();
ByteArrayInputStream src = new ByteArrayInputStream(memOut.toByteArray());
ObjectInputStream objIs = new ObjectInputStream(src);
return objIs.readObject();
}
/**
* Deserializes a specified file.
* @param witness serialization file, may not be null.
* @return deserialized object.
* @throws Exception thrown on IO or deserialization exception.
*/
public static Object deserializeStream(final String witness)
throws Exception {
FileInputStream fileIs = new FileInputStream(witness);
ObjectInputStream objIs = new ObjectInputStream(fileIs);
return objIs.readObject();
}
/**
* Checks the serialization of an object against an file
* containing the expected serialization.
*
* @param witness name of file containing expected serialization.
* @param obj object to be serialized.
* @param skip positions in serialized stream that should not be compared.
* @param endCompare position to stop comparison.
* @throws Exception thrown on IO or serialization exception.
*/
public static void assertSerializationEquals(
final String witness, final Object obj, final int[] skip,
final int endCompare) throws Exception {
ByteArrayOutputStream memOut = new ByteArrayOutputStream();
ObjectOutputStream objOut = new ObjectOutputStream(memOut);
objOut.writeObject(obj);
objOut.close();
assertStreamEquals(witness, memOut.toByteArray(), skip, endCompare);
}
/**
* Asserts the serialized form of an object.
* @param witness file name of expected serialization.
* @param actual byte array of actual serialization.
* @param skip positions to skip comparison.
* @param endCompare position to stop comparison.
* @throws IOException thrown on IO or serialization exception.
*/
public static void assertStreamEquals(
final String witness, final byte[] actual, final int[] skip,
final int endCompare) throws IOException {
File witnessFile = new File(witness);
if (witnessFile.exists()) {
int skipIndex = 0;
byte[] expected = new byte[actual.length];
FileInputStream is = new FileInputStream(witnessFile);
int bytesRead = is.read(expected);
is.close();
if(bytesRead < endCompare) {
TestCase.assertEquals(bytesRead, actual.length);
}
int endScan = actual.length;
if (endScan > endCompare) {
endScan = endCompare;
}
for (int i = 0; i < endScan; i++) {
if ((skipIndex < skip.length) && (skip[skipIndex] == i)) {
skipIndex++;
} else {
if (expected[i] != actual[i]) {
TestCase.assertEquals(
"Difference at offset " + i, expected[i], actual[i]);
}
}
}
} else {
//
// if the file doesn't exist then
// assume that we are setting up and need to write it
FileOutputStream os = new FileOutputStream(witnessFile);
os.write(actual);
os.close();
TestCase.fail("Writing witness file " + witness);
}
}
}