1 // Protocol Buffers - Google's data interchange format 2 // Copyright 2008 Google Inc. All rights reserved. 3 // https://developers.google.com/protocol-buffers/ 4 // 5 // Redistribution and use in source and binary forms, with or without 6 // modification, are permitted provided that the following conditions are 7 // met: 8 // 9 // * Redistributions of source code must retain the above copyright 10 // notice, this list of conditions and the following disclaimer. 11 // * Redistributions in binary form must reproduce the above 12 // copyright notice, this list of conditions and the following disclaimer 13 // in the documentation and/or other materials provided with the 14 // distribution. 15 // * Neither the name of Google Inc. nor the names of its 16 // contributors may be used to endorse or promote products derived from 17 // this software without specific prior written permission. 18 // 19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31 package com.google.protobuf.kotlin 32 33 /** Wraps an [Iterator] and makes it unmodifiable even from Java. */ 34 internal class UnmodifiableIterator<E>(delegate: Iterator<E>) : Iterator<E> by delegate 35 36 /** Wraps a [ListIterator] and makes it unmodifiable even from Java. */ 37 internal class UnmodifiableListIterator<E>(delegate: ListIterator<E>) : ListIterator<E> by delegate 38 39 /** Wraps a [Collection] and makes it unmodifiable even from Java. */ 40 internal open class UnmodifiableCollection<E>(private val delegate: Collection<E>) : <lambda>null41 Collection<E> by delegate { 42 override fun iterator(): Iterator<E> = UnmodifiableIterator(delegate.iterator()) 43 } 44 45 /** Wraps a [Set] and makes it unmodifiable even from Java. */ 46 internal class UnmodifiableSet<E>(delegate: Collection<E>) : 47 UnmodifiableCollection<E>(delegate), Set<E> 48 49 /** Wraps a [Map.Entry] and makes it unmodifiable even from Java. */ 50 internal class UnmodifiableMapEntry<K, V>(delegate: Map.Entry<K, V>) : Map.Entry<K, V> by delegate 51 52 /** Wraps a [Set] of map entries and makes it unmodifiable even from Java. */ 53 internal class UnmodifiableMapEntries<K, V>(private val delegate: Set<Map.Entry<K, V>>) : 54 UnmodifiableCollection<Map.Entry<K, V>>(delegate), Set<Map.Entry<K, V>> { 55 56 // Is this overkill? Probably. 57 iteratornull58 override fun iterator(): Iterator<Map.Entry<K, V>> { 59 val itr = delegate.iterator() 60 return object : Iterator<Map.Entry<K, V>> by itr { 61 override fun next(): Map.Entry<K, V> = UnmodifiableMapEntry(itr.next()) 62 } 63 } 64 } 65