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//
// Copyright 2020-2022 Sean C Foley
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package ipaddr
type filteredAddrIterator struct {
skip func(*Address) bool
iter Iterator[*Address]
next *Address
}
func (it *filteredAddrIterator) Next() (res *Address) {
res = it.next
for {
next := it.iter.Next()
if next == nil || !it.skip(next) {
it.next = next
break
}
}
return res
}
func (it *filteredAddrIterator) HasNext() bool {
return it.next != nil
}
// NewFilteredAddrIterator modifies an address iterator to skip certain addresses,
// skipping those elements for which the "skip" function returns true
func NewFilteredAddrIterator(iter Iterator[*Address], skip func(*Address) bool) Iterator[*Address] {
res := &filteredAddrIterator{skip: skip, iter: iter}
res.Next()
return res
}
type filteredIPAddrIterator struct {
skip func(*IPAddress) bool
iter Iterator[*IPAddress]
next *IPAddress
}
func (it *filteredIPAddrIterator) Next() (res *IPAddress) {
res = it.next
for {
next := it.iter.Next()
if next == nil || !it.skip(next) {
it.next = next
break
}
}
return res
}
func (it *filteredIPAddrIterator) HasNext() bool {
return it.next != nil
}
// NewFilteredIPAddrIterator returns an iterator similar to the passed in iterator,
// but skipping those elements for which the "skip" function returns true
func NewFilteredIPAddrIterator(iter Iterator[*IPAddress], skip func(*IPAddress) bool) Iterator[*IPAddress] {
res := &filteredIPAddrIterator{skip: skip, iter: iter}
res.Next()
return res
}
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