forked from cerc-io/ipld-eth-server
47 lines
1.1 KiB
Go
47 lines
1.1 KiB
Go
// Copyright (c) 2018 Arista Networks, Inc.
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// Use of this source code is governed by the Apache License 2.0
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// that can be found in the COPYING file.
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package key
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import (
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"fmt"
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)
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// Pointer is a pointer to a path.
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type Pointer interface {
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Pointer() Path
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}
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// NewPointer creates a new pointer to a path.
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func NewPointer(path Path) Pointer {
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return pointer(path)
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}
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// This is the type returned by pointerKey.Key. Returning this is a
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// lot faster than having pointerKey implement Pointer, since it is
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// a compositeKey and thus would require reconstructing a Path from
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// []interface{} any time the Pointer method is called.
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type pointer Path
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func (ptr pointer) Pointer() Path {
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return Path(ptr)
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}
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func (ptr pointer) String() string {
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return "{" + ptr.Pointer().String() + "}"
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}
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func (ptr pointer) MarshalJSON() ([]byte, error) {
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return []byte(fmt.Sprintf(`{"_ptr":%q}`, ptr.Pointer().String())), nil
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}
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func (ptr pointer) Equal(other interface{}) bool {
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o, ok := other.(Pointer)
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return ok && pointerEqual(ptr, o)
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}
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func pointerEqual(a, b Pointer) bool {
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return pathEqual(a.Pointer(), b.Pointer())
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}
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