func()

in vhdcore/vhdfile/vhdFile.go [42:80]

• 34 lines of code
• 6 McCabe index (conditional complexity)

func (f *VhdFile) GetBlockFactory() (block.Factory, error) {
	params := &block.FactoryParams{
		VhdHeader: f.Header,
		VhdFooter: f.Footer,
		VhdReader: f.VhdReader,
	}

	switch f.GetDiskType() {
	case footer.DiskTypeFixed:
		return block.NewFixedDiskBlockFactoryWithDefaultBlockSize(params), nil

	case footer.DiskTypeDynamic:
		params.BlockAllocationTable = f.BlockAllocationTable
		return block.NewDynamicDiskFactory(params), nil

	case footer.DiskTypeDifferencing:
		params.BlockAllocationTable = f.BlockAllocationTable
		parentVhdFile := f.Parent
		if parentVhdFile.GetDiskType() == footer.DiskTypeFixed {
			params.ParentBlockFactory = block.NewFixedDiskBlockFactory(
				&block.FactoryParams{
					VhdHeader: parentVhdFile.Header,
					VhdFooter: parentVhdFile.Footer,
					VhdReader: parentVhdFile.VhdReader,
				},
				int64(f.Header.BlockSize)) // The block-size of parent FixedDisk and this DifferentialDisk will be same.

		} else {
			var err error
			params.ParentBlockFactory, err = parentVhdFile.GetBlockFactory()
			if err != nil {
				return nil, err
			}
		}
		return block.NewDifferencingDiskBlockFactory(params), nil
	}

	return nil, fmt.Errorf("Unsupported disk format: %d", f.GetDiskType())
}