/src/Boo.Lang/Runtime/AbstractDispatcherFactory.cs
C# | 113 lines | 74 code | 14 blank | 25 comment | 4 complexity | 0a64127dbae82c08b39262ecc3912c5f MD5 | raw file
Possible License(s): GPL-2.0
- #region license
- // Copyright (c) 2003, 2004, 2005 Rodrigo B. de Oliveira (rbo@acm.org)
- // All rights reserved.
- //
- // 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 Rodrigo B. de Oliveira 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;
- using System.Collections.Generic;
- using System.Reflection;
-
- namespace Boo.Lang.Runtime
- {
- public abstract class AbstractDispatcherFactory
- {
- private readonly ExtensionRegistry _extensions;
- private readonly object _target;
- protected readonly Type _type;
- protected readonly string _name;
- private readonly object[] _arguments;
-
- public AbstractDispatcherFactory(ExtensionRegistry extensions, object target, Type type, string name, params object[] arguments)
- {
- _extensions = extensions;
- _target = target;
- _type = type;
- _name = name;
- _arguments = arguments;
- }
-
- protected IEnumerable<MemberInfo> Extensions
- {
- get { return _extensions.Extensions; }
- }
-
- protected object[] GetExtensionArgs()
- {
- object[] extensionArgs = new object[_arguments.Length + 1];
- extensionArgs[0] = _target;
- Array.Copy(_arguments, 0, extensionArgs, 1, _arguments.Length);
- return extensionArgs;
- }
-
- protected Type[] GetArgumentTypes()
- {
- return MethodResolver.GetArgumentTypes(_arguments);
- }
-
- protected Type[] GetExtensionArgumentTypes()
- {
- return MethodResolver.GetArgumentTypes(GetExtensionArgs());
- }
-
- protected Dispatcher EmitExtensionDispatcher(CandidateMethod found)
- {
- return new ExtensionMethodDispatcherEmitter(found, GetArgumentTypes()).Emit();
- }
-
- protected CandidateMethod ResolveExtension(IEnumerable<MethodInfo> candidates)
- {
- MethodResolver resolver = new MethodResolver(GetExtensionArgumentTypes());
- return resolver.ResolveMethod(candidates);
- }
-
- protected IEnumerable<MethodInfo> GetExtensionMethods()
- {
- return GetExtensions<MethodInfo>(MemberTypes.Method);
- }
-
- protected IEnumerable<T> GetExtensions<T>(MemberTypes memberTypes)
- where T: MemberInfo
- {
- foreach (MemberInfo m in Extensions)
- {
- if (m.MemberType != memberTypes) continue;
- if (m.Name != _name) continue;
- yield return (T)m;
- }
- }
-
- protected static CandidateMethod ResolveMethod(Type[] argumentTypes, IEnumerable<MethodInfo> candidates)
- {
- return new MethodResolver(argumentTypes).ResolveMethod(candidates);
- }
-
- protected MissingFieldException MissingField()
- {
- return new MissingFieldException(_type.FullName, _name);
- }
- }
- }