public CollectionPage(PageBuffer buffer)
: base(buffer)
{
ENSURE(this.PageType == PageType.Collection, "page type must be collection page");
if (this.PageType != PageType.Collection)
{
LiteException.InvalidPageType(PageType.Collection, this);
}
// create new buffer area to store BsonDocument indexes
var area = _buffer.Slice(PAGE_HEADER_SIZE, PAGE_SIZE - PAGE_HEADER_SIZE);
using (var r = new BufferReader(new[] { area }, false))
{
// read position for FreeDataPage and FreeIndexPage
for (var i = 0; i < PAGE_FREE_LIST_SLOTS; i++)
{
this.FreeDataPageList[i] = r.ReadUInt32();
}
// skip reserved area
r.Skip(P_INDEXES - PAGE_HEADER_SIZE - r.Position);
// read indexes count (max 255 indexes per collection)
var count = r.ReadByte(); // 1 byte
for (var i = 0; i < count; i++)
{
var index = new CollectionIndex(r);
_indexes[index.Name] = index;
}
}
}
/// <summary>
/// Read existing DataPage in buffer
/// </summary>
public DataPage(PageBuffer buffer)
: base(buffer)
{
ENSURE(this.PageType == PageType.Data, "page type must be data page");
if (this.PageType != PageType.Data)
{
throw LiteException.InvalidPageType(PageType.Data, this);
}
}
/// <summary>
/// Read existing IndexPage in buffer
/// </summary>
public IndexPage(PageBuffer buffer)
: base(buffer)
{
ENSURE(this.PageType == PageType.Index, "page type must be index page");
if (this.PageType != PageType.Index)
{
throw LiteException.InvalidPageType(PageType.Index, this);
}
}