diff options
Diffstat (limited to 'csharp/src/ProtocolBuffers/GeneratedExtensionLite.cs')
| -rw-r--r-- | csharp/src/ProtocolBuffers/GeneratedExtensionLite.cs | 354 |
1 files changed, 354 insertions, 0 deletions
diff --git a/csharp/src/ProtocolBuffers/GeneratedExtensionLite.cs b/csharp/src/ProtocolBuffers/GeneratedExtensionLite.cs new file mode 100644 index 00000000..a1623348 --- /dev/null +++ b/csharp/src/ProtocolBuffers/GeneratedExtensionLite.cs @@ -0,0 +1,354 @@ +#region Copyright notice and license
+
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc. All rights reserved.
+// http://github.com/jskeet/dotnet-protobufs/
+// Original C++/Java/Python code:
+// http://code.google.com/p/protobuf/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System.Collections;
+using System.Collections.Generic;
+using Google.ProtocolBuffers.Descriptors;
+
+namespace Google.ProtocolBuffers
+{
+ public interface IGeneratedExtensionLite
+ {
+ int Number { get; }
+ object ContainingType { get; }
+ IMessageLite MessageDefaultInstance { get; }
+ IFieldDescriptorLite Descriptor { get; }
+ }
+
+ public class ExtensionDescriptorLite : IFieldDescriptorLite
+ {
+ private readonly string fullName;
+ private readonly IEnumLiteMap enumTypeMap;
+ private readonly int number;
+ private readonly FieldType type;
+ private readonly bool isRepeated;
+ private readonly bool isPacked;
+ private readonly MappedType mapType;
+ private readonly object defaultValue;
+
+ public ExtensionDescriptorLite(string fullName, IEnumLiteMap enumTypeMap, int number, FieldType type,
+ object defaultValue, bool isRepeated, bool isPacked)
+ {
+ this.fullName = fullName;
+ this.enumTypeMap = enumTypeMap;
+ this.number = number;
+ this.type = type;
+ this.mapType = FieldMappingAttribute.MappedTypeFromFieldType(type);
+ this.isRepeated = isRepeated;
+ this.isPacked = isPacked;
+ this.defaultValue = defaultValue;
+ }
+
+ public string Name
+ {
+ get
+ {
+ string name = fullName;
+ int offset = name.LastIndexOf('.');
+ if (offset >= 0)
+ {
+ name = name.Substring(offset);
+ }
+ return name;
+ }
+ }
+
+ public string FullName
+ {
+ get { return fullName; }
+ }
+
+ public bool IsRepeated
+ {
+ get { return isRepeated; }
+ }
+
+ public bool IsRequired
+ {
+ get { return false; }
+ }
+
+ public bool IsPacked
+ {
+ get { return isPacked; }
+ }
+
+ public bool IsExtension
+ {
+ get { return true; }
+ }
+
+ /// <summary>
+ /// This is not supported and assertions are made to ensure this does not exist on extensions of Lite types
+ /// </summary>
+ public bool MessageSetWireFormat
+ {
+ get { return false; }
+ }
+
+ public int FieldNumber
+ {
+ get { return number; }
+ }
+
+ public IEnumLiteMap EnumType
+ {
+ get { return enumTypeMap; }
+ }
+
+ public FieldType FieldType
+ {
+ get { return type; }
+ }
+
+ public MappedType MappedType
+ {
+ get { return mapType; }
+ }
+
+ public object DefaultValue
+ {
+ get { return defaultValue; }
+ }
+
+ public int CompareTo(IFieldDescriptorLite other)
+ {
+ return FieldNumber.CompareTo(other.FieldNumber);
+ }
+ }
+
+ public class GeneratedRepeatExtensionLite<TContainingType, TExtensionType> :
+ GeneratedExtensionLite<TContainingType, IList<TExtensionType>>
+ where TContainingType : IMessageLite
+ {
+ public GeneratedRepeatExtensionLite(string fullName, TContainingType containingTypeDefaultInstance,
+ IMessageLite messageDefaultInstance, IEnumLiteMap enumTypeMap, int number,
+ FieldType type, bool isPacked) :
+ base(
+ fullName, containingTypeDefaultInstance, new List<TExtensionType>(),
+ messageDefaultInstance, enumTypeMap, number, type, isPacked)
+ {
+ }
+
+ public override object ToReflectionType(object value)
+ {
+ IList<object> result = new List<object>();
+ foreach (object element in (IEnumerable) value)
+ {
+ result.Add(SingularToReflectionType(element));
+ }
+ return result;
+ }
+
+ public override object FromReflectionType(object value)
+ {
+ // Must convert the whole list.
+ List<TExtensionType> result = new List<TExtensionType>();
+ foreach (object element in (IEnumerable) value)
+ {
+ result.Add((TExtensionType) SingularFromReflectionType(element));
+ }
+ return result;
+ }
+ }
+
+ public class GeneratedExtensionLite<TContainingType, TExtensionType> : IGeneratedExtensionLite
+ where TContainingType : IMessageLite
+ {
+ private readonly TContainingType containingTypeDefaultInstance;
+ private readonly TExtensionType defaultValue;
+ private readonly IMessageLite messageDefaultInstance;
+ private readonly ExtensionDescriptorLite descriptor;
+
+ // We can't always initialize a GeneratedExtension when we first construct
+ // it due to initialization order difficulties (namely, the default
+ // instances may not have been constructed yet). So, we construct an
+ // uninitialized GeneratedExtension once, then call internalInit() on it
+ // later. Generated code will always call internalInit() on all extensions
+ // as part of the static initialization code, and internalInit() throws an
+ // exception if called more than once, so this method is useless to users.
+ protected GeneratedExtensionLite(
+ TContainingType containingTypeDefaultInstance,
+ TExtensionType defaultValue,
+ IMessageLite messageDefaultInstance,
+ ExtensionDescriptorLite descriptor)
+ {
+ this.containingTypeDefaultInstance = containingTypeDefaultInstance;
+ this.messageDefaultInstance = messageDefaultInstance;
+ this.defaultValue = defaultValue;
+ this.descriptor = descriptor;
+ }
+
+ /** For use by generated code only. */
+
+ public GeneratedExtensionLite(
+ string fullName,
+ TContainingType containingTypeDefaultInstance,
+ TExtensionType defaultValue,
+ IMessageLite messageDefaultInstance,
+ IEnumLiteMap enumTypeMap,
+ int number,
+ FieldType type)
+ : this(containingTypeDefaultInstance, defaultValue, messageDefaultInstance,
+ new ExtensionDescriptorLite(fullName, enumTypeMap, number, type, defaultValue,
+ false /* isRepeated */, false /* isPacked */))
+ {
+ }
+
+ private static readonly IList<object> Empty = new object[0];
+ /** Repeating fields: For use by generated code only. */
+
+ protected GeneratedExtensionLite(
+ string fullName,
+ TContainingType containingTypeDefaultInstance,
+ TExtensionType defaultValue,
+ IMessageLite messageDefaultInstance,
+ IEnumLiteMap enumTypeMap,
+ int number,
+ FieldType type,
+ bool isPacked)
+ : this(containingTypeDefaultInstance, defaultValue, messageDefaultInstance,
+ new ExtensionDescriptorLite(fullName, enumTypeMap, number, type, Empty,
+ true /* isRepeated */, isPacked))
+ {
+ }
+
+ /// <summary>
+ /// Returns information about this extension
+ /// </summary>
+ public IFieldDescriptorLite Descriptor
+ {
+ get { return descriptor; }
+ }
+
+ /// <summary>
+ /// Returns the default value for this extension
+ /// </summary>
+ public TExtensionType DefaultValue
+ {
+ get { return defaultValue; }
+ }
+
+ /// <summary>
+ /// used for the extension registry
+ /// </summary>
+ object IGeneratedExtensionLite.ContainingType
+ {
+ get { return ContainingTypeDefaultInstance; }
+ }
+
+ /**
+ * Default instance of the type being extended, used to identify that type.
+ */
+
+ public TContainingType ContainingTypeDefaultInstance
+ {
+ get { return containingTypeDefaultInstance; }
+ }
+
+ /** Get the field number. */
+
+ public int Number
+ {
+ get { return descriptor.FieldNumber; }
+ }
+
+ /**
+ * If the extension is an embedded message, this is the default instance of
+ * that type.
+ */
+
+ public IMessageLite MessageDefaultInstance
+ {
+ get { return messageDefaultInstance; }
+ }
+
+ /// <summary>
+ /// Converts from the type used by the native accessors to the type
+ /// used by reflection accessors. For example, the reflection accessors
+ /// for enums use EnumValueDescriptors but the native accessors use
+ /// the generated enum type.
+ /// </summary>
+ public virtual object ToReflectionType(object value)
+ {
+ return SingularToReflectionType(value);
+ }
+
+ /// <summary>
+ /// Like ToReflectionType(object) but for a single element.
+ /// </summary>
+ public object SingularToReflectionType(object value)
+ {
+ return descriptor.MappedType == MappedType.Enum
+ ? descriptor.EnumType.FindValueByNumber((int) value)
+ : value;
+ }
+
+ public virtual object FromReflectionType(object value)
+ {
+ return SingularFromReflectionType(value);
+ }
+
+ public object SingularFromReflectionType(object value)
+ {
+ switch (Descriptor.MappedType)
+ {
+ case MappedType.Message:
+ if (value is TExtensionType)
+ {
+ return value;
+ }
+ else
+ {
+ // It seems the copy of the embedded message stored inside the
+ // extended message is not of the exact type the user was
+ // expecting. This can happen if a user defines a
+ // GeneratedExtension manually and gives it a different type.
+ // This should not happen in normal use. But, to be nice, we'll
+ // copy the message to whatever type the caller was expecting.
+ return MessageDefaultInstance.WeakCreateBuilderForType()
+ .WeakMergeFrom((IMessageLite) value).WeakBuild();
+ }
+ case MappedType.Enum:
+ // Just return a boxed int - that can be unboxed to the enum
+ IEnumLite enumValue = (IEnumLite) value;
+ return enumValue.Number;
+ default:
+ return value;
+ }
+ }
+ }
+}
\ No newline at end of file |