public PersistentNextSpaceArray(String arrayName, int elementSize, int userHeaderSize)
{
if (elementSize <= 0)
throw new InvalidElementSizeException("The element size must be greater than zero");
if(userHeaderSize < 0)
throw new InvalidUserHeaderException("User Header size must be positive");
_fileWithHeader = new FileWithHeader(arrayName, userHeaderSize + GetElementSizeSize());
PutElementSize(elementSize);
PutUserHeader(new byte[0]);
}
public void FileAlreadyExistsTest()
{
string fileName = "AlreadyExists";
FileWithHeader fwh = InitFWH(fileName, 5);
FileWithHeader fwh2 = null;
try
{
fwh2 = new FileWithHeader(fileName, 5);
Assert.Fail("Should throw exception");
}
catch (FileNameConflictException) { }
finally
{
fwh.Close();
if (fwh2 != null) //if for some reason it actuall worked,
fwh2.Close(); // still close the file
}
}
public PersistentNextSpaceArray(String arrayName)
{
_fileWithHeader = new FileWithHeader(arrayName);
byte[] userHeaderBytes = _fileWithHeader.GetUserHeader();
}
private static void GetPutTestAssert(byte expectedValue, int expectedIndex, FileWithHeader target)
{
int nextIndexBefore = target.GetNextIndex();
target.Put(expectedIndex, expectedValue);
if (expectedIndex >= nextIndexBefore)
Assert.AreEqual(expectedIndex+1, target.GetNextIndex());
Assert.AreEqual(expectedValue, target.Get(expectedIndex));
}
private static void GetRangeTestAssert(byte[] bytes, int startIndex, FileWithHeader fwh)
{
fwh.Put(startIndex, bytes);
byte[] actual = fwh.GetRange(startIndex, startIndex+bytes.Length - 1);
TestHelper.AssertByteArraysAreSame(bytes, actual);
}
private static void GetPutArrayTestAssert(FileWithHeader fwh, int index, byte[] data)
{
int nextIndexBefore = fwh.GetNextIndex();
fwh.Put(index, data);
if(index+data.Length >= nextIndexBefore)
Assert.AreEqual(index+data.Length, fwh.GetNextIndex());
byte[] actual = fwh.GetAmount(index, data.Length);
TestHelper.AssertByteArraysAreSame(data, actual);
}
public void ReopenTest()
{
string fileName = "ReopenFileWithHeaderTest";
FileWithHeader fwh = InitFWH(fileName, 5);
try
{
//write values
int expectedIndex1 = 0;
byte expectedValue1 = 6;
fwh.Put(expectedIndex1, expectedValue1);
int expectedIndex2 = 55;
byte expectedValue2 = 200;
fwh.Put(expectedIndex2, expectedValue2);
//get next index
int expectedNextIndex = fwh.GetNextIndex();
byte[] expectedUserHeader = new byte[5]{1,2,3,4,5};
fwh.PutUserHeader(expectedUserHeader);
fwh.Close();
fwh = new FileWithHeader(fileName);
Assert.AreEqual(expectedValue1, fwh.Get(expectedIndex1));
Assert.AreEqual(expectedValue2, fwh.Get(expectedIndex2));
Assert.AreEqual(expectedNextIndex, fwh.GetNextIndex());
TestHelper.AssertByteArraysAreSame(expectedUserHeader, fwh.GetUserHeader());
}
finally
{
fwh.Close();
}
}
public FileWithHeader InitFWH(string fileName, int userHeaderSize)
{
FileWithHeader fwh;
try
{
fwh = new FileWithHeader(fileName, userHeaderSize);
}
catch (FileNameConflictException)
{
fwh = new FileWithHeader(fileName);
fwh.Delete();
fwh = new FileWithHeader(fileName, userHeaderSize);
}
return fwh;
}
public PersistentHeap(String heapName)
{
_file = new FileWithHeader(heapName);
}
public PersistentHeap(String heapName, int userHeaderSize)
{
_file = new FileWithHeader(heapName, userHeaderSize + GetFreeSpaceHeadSize());
PutFreeSpaceHead(FreeLinkedListNullPointer);
}
