text: // Copyright 2015 go-swagger maintainers
  //
  // 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.
  
  // +build !go1.9
  
  package swag
  
  import (
  	"sort"
  	"sync"
  )
  
  // indexOfInitialisms is a thread-safe implementation of the sorted index of initialisms.
  // Before go1.9, this may be implemented with a mutex on the map.
  type indexOfInitialisms struct {
  	getMutex *sync.Mutex
  	index    map[string]bool
  }
  
  func newIndexOfInitialisms() *indexOfInitialisms {
  	return &indexOfInitialisms{
  		getMutex: new(sync.Mutex),
  		index:    make(map[string]bool, 50),
  	}
  }
  
  func (m *indexOfInitialisms) load(initial map[string]bool) *indexOfInitialisms {
  	m.getMutex.Lock()
  	defer m.getMutex.Unlock()
  	for k, v := range initial {
  		m.index[k] = v
  	}
  	return m
  }
  
  func (m *indexOfInitialisms) isInitialism(key string) bool {
  	m.getMutex.Lock()
  	defer m.getMutex.Unlock()
  	_, ok := m.index[key]
  	return ok
  }
  
  func (m *indexOfInitialisms) add(key string) *indexOfInitialisms {
  	m.getMutex.Lock()
  	defer m.getMutex.Unlock()
  	m.index[key] = true
  	return m
  }
  
  func (m *indexOfInitialisms) sorted() (result []string) {
  	m.getMutex.Lock()
  	defer m.getMutex.Unlock()
  	for k := range m.index {
  		result = append(result, k)
  	}
  	sort.Sort(sort.Reverse(byInitialism(result)))
  	return
  }
  