options

type IteratorOption ¶

type IteratorOption interface {
	// ApplyKV applies option to the KV iterator. Implementation may wrap or replace the iterator.
	ApplyKV(it kv.Iterator) kv.Iterator
	// ApplyFlat option to the flat KV iterator. Implementation may wrap or replace the iterator.
	ApplyFlat(it flat.Iterator) flat.Iterator
}

IteratorOption is an additional option that affects iterator behaviour.

Implementations in generic KV package should assert for an optimized version of option (via interface assertion), and fallback to generic implementation if the store doesn't support this option natively.

func WithPrefixFlat(pref flat.Key) IteratorOption

func WithPrefixKV(pref kv.Key) IteratorOption

type PrefixFlat ¶

type PrefixFlat struct {
	Pref flat.Key
}

PrefixFlat implements IteratorOption. See WithPrefixFlat.

func (opt PrefixFlat) ApplyFlat(it flat.Iterator) flat.Iterator

func (opt PrefixFlat) ApplyKV(it kv.Iterator) kv.Iterator

type PrefixKV ¶

type PrefixKV struct {
	Pref kv.Key
}

PrefixKV implements IteratorOption. See WithPrefixKV.

func (opt PrefixKV) ApplyFlat(it flat.Iterator) flat.Iterator

func (opt PrefixKV) ApplyKV(it kv.Iterator) kv.Iterator