| | | 1 | | // Copyright (c) ZeroC, Inc. |
| | | 2 | | |
| | | 3 | | using System.Buffers; |
| | | 4 | | using ZeroC.Slice.Codec; |
| | | 5 | | |
| | | 6 | | namespace IceRpc; |
| | | 7 | | |
| | | 8 | | /// <summary>Provides extension method for field dictionaries.</summary> |
| | | 9 | | public static class FieldsExtensions |
| | | 10 | | { |
| | | 11 | | /// <summary>Retrieves the decoded field value associated with a field key.</summary> |
| | | 12 | | /// <typeparam name="TKey">The type of the field keys.</typeparam> |
| | | 13 | | /// <typeparam name="TValue">The type of the decoded field value.</typeparam> |
| | | 14 | | /// <param name="fields">The field dictionary.</param> |
| | | 15 | | /// <param name="key">The key to lookup in the field dictionary.</param> |
| | | 16 | | /// <param name="decodeFunc">The function used to decode the field value.</param> |
| | | 17 | | /// <returns>The decoded field value, or default if the key was not found in <paramref name="fields" />. |
| | | 18 | | /// </returns> |
| | | 19 | | public static TValue? DecodeValue<TKey, TValue>( |
| | | 20 | | this IDictionary<TKey, ReadOnlySequence<byte>> fields, |
| | | 21 | | TKey key, |
| | | 22 | | DecodeFunc<TValue> decodeFunc) where TKey : struct => |
| | 17 | 23 | | fields.TryGetValue(key, out ReadOnlySequence<byte> value) ? value.DecodeSliceBuffer(decodeFunc) : default; |
| | | 24 | | |
| | | 25 | | /// <summary>Sets an entry in the outgoing fields dictionary and returns the fields dictionary. If |
| | | 26 | | /// <paramref name="fields" /> is read-only, a copy is created, modified then returned.</summary> |
| | | 27 | | /// <typeparam name="TKey">The type of the field key.</typeparam> |
| | | 28 | | /// <param name="fields">A fields dictionary.</param> |
| | | 29 | | /// <param name="key">The key of the entry to set.</param> |
| | | 30 | | /// <param name="value">The value of the entry to set.</param> |
| | | 31 | | /// <returns>The fields dictionary.</returns> |
| | | 32 | | public static IDictionary<TKey, OutgoingFieldValue> With<TKey>( |
| | | 33 | | this IDictionary<TKey, OutgoingFieldValue> fields, |
| | | 34 | | TKey key, |
| | | 35 | | OutgoingFieldValue value) where TKey : struct |
| | 38 | 36 | | { |
| | 38 | 37 | | if (fields.IsReadOnly) |
| | 36 | 38 | | { |
| | 36 | 39 | | fields = new Dictionary<TKey, OutgoingFieldValue>(fields); |
| | 36 | 40 | | } |
| | 38 | 41 | | fields[key] = value; |
| | 38 | 42 | | return fields; |
| | 38 | 43 | | } |
| | | 44 | | |
| | | 45 | | /// <summary>Sets an entry in the outgoing fields dictionary and returns the fields dictionary. If |
| | | 46 | | /// <paramref name="fields" /> is read-only, a copy is created, modified and then returned.</summary> |
| | | 47 | | /// <typeparam name="TKey">The type of the field key.</typeparam> |
| | | 48 | | /// <typeparam name="TValue">The type of the value to encode.</typeparam> |
| | | 49 | | /// <param name="fields">A fields dictionary.</param> |
| | | 50 | | /// <param name="key">The key of the entry to set.</param> |
| | | 51 | | /// <param name="value">The value of the entry to set.</param> |
| | | 52 | | /// <param name="encodeAction">The encode action.</param> |
| | | 53 | | /// <returns>The fields dictionary.</returns> |
| | | 54 | | public static IDictionary<TKey, OutgoingFieldValue> With<TKey, TValue>( |
| | | 55 | | this IDictionary<TKey, OutgoingFieldValue> fields, |
| | | 56 | | TKey key, |
| | | 57 | | TValue value, |
| | | 58 | | EncodeAction<TValue> encodeAction) |
| | | 59 | | where TKey : struct => |
| | 13 | 60 | | fields.With(key, new OutgoingFieldValue(bufferWriter => |
| | 9 | 61 | | { |
| | 9 | 62 | | var encoder = new SliceEncoder(bufferWriter); |
| | 9 | 63 | | encodeAction(ref encoder, value); |
| | 21 | 64 | | })); |
| | | 65 | | |
| | | 66 | | /// <summary>Sets an entry in the outgoing fields dictionary and returns the fields dictionary. If |
| | | 67 | | /// <paramref name="fields" /> is read-only, a copy is created, modified then returned.</summary> |
| | | 68 | | /// <typeparam name="TKey">The type of the field key.</typeparam> |
| | | 69 | | /// <param name="fields">A fields dictionary.</param> |
| | | 70 | | /// <param name="key">The key of the entry to set.</param> |
| | | 71 | | /// <param name="value">The value of the entry to set.</param> |
| | | 72 | | /// <returns>The fields dictionary.</returns> |
| | | 73 | | public static IDictionary<TKey, OutgoingFieldValue> With<TKey>( |
| | | 74 | | this IDictionary<TKey, OutgoingFieldValue> fields, |
| | | 75 | | TKey key, |
| | 10 | 76 | | ReadOnlySequence<byte> value) where TKey : struct => fields.With(key, new OutgoingFieldValue(value)); |
| | | 77 | | |
| | | 78 | | /// <summary>Removes an entry in the fields dictionary and returns the fields dictionary. If |
| | | 79 | | /// <paramref name="fields" /> is read-only and contains the value, a copy is created, modified then returned. |
| | | 80 | | /// </summary> |
| | | 81 | | /// <typeparam name="TKey">The type of the field key.</typeparam> |
| | | 82 | | /// <param name="fields">A fields dictionary.</param> |
| | | 83 | | /// <param name="key">The key of the entry to check.</param> |
| | | 84 | | /// <returns>The fields dictionary.</returns> |
| | | 85 | | public static IDictionary<TKey, OutgoingFieldValue> Without<TKey>( |
| | | 86 | | this IDictionary<TKey, OutgoingFieldValue> fields, |
| | | 87 | | TKey key) where TKey : struct |
| | 1 | 88 | | { |
| | 1 | 89 | | if (fields.IsReadOnly) |
| | 1 | 90 | | { |
| | 1 | 91 | | if (fields.ContainsKey(key)) |
| | 0 | 92 | | { |
| | 0 | 93 | | fields = new Dictionary<TKey, OutgoingFieldValue>(fields); |
| | 0 | 94 | | _ = fields.Remove(key); |
| | 0 | 95 | | } |
| | 1 | 96 | | } |
| | | 97 | | else |
| | 0 | 98 | | { |
| | 0 | 99 | | _ = fields.Remove(key); |
| | 0 | 100 | | } |
| | 1 | 101 | | return fields; |
| | 1 | 102 | | } |
| | | 103 | | } |