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Viewing changes to contrib/ICSharpCode.NRefactory/TypeSystem/Implementation/DefaultMemberReference.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
Import upstream version 4.0.5+dfsg

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contrib/ICSharpCode.NRefactory/TypeSystem/Implementation/DefaultMemberReference.cs
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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team
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// 
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
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// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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// to whom the Software is furnished to do so, subject to the following conditions:
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// 
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// The above copyright notice and this permission notice shall be included in all copies or
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// substantial portions of the Software.
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// 
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using System;
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using System.Collections.Generic;
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using System.Linq;
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namespace ICSharpCode.NRefactory.TypeSystem.Implementation
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{
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        /// <summary>
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        /// References an entity by its type and name.
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        /// This class can be used to refer to all members except for constructors and explicit interface implementations.
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        /// </summary>
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        /// <remarks>
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        /// Resolving a DefaultMemberReference requires a context that provides enough information for resolving the declaring type reference
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        /// and the parameter types references.
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        /// </remarks>
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        [Serializable]
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        public sealed class DefaultMemberReference : IMemberReference, ISupportsInterning
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        {
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                EntityType entityType;
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                ITypeReference typeReference;
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                string name;
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                int typeParameterCount;
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                IList<ITypeReference> parameterTypes;
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                public DefaultMemberReference(EntityType entityType, ITypeReference typeReference, string name, int typeParameterCount = 0, IList<ITypeReference> parameterTypes = null)
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                {
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                        if (typeReference == null)
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                                throw new ArgumentNullException("typeReference");
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                        if (name == null)
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                                throw new ArgumentNullException("name");
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                        if (typeParameterCount != 0 && entityType != EntityType.Method)
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                                throw new ArgumentException("Type parameter count > 0 is only supported for methods.");
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                        this.entityType = entityType;
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                        this.typeReference = typeReference;
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                        this.name = name;
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                        this.typeParameterCount = typeParameterCount;
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                        this.parameterTypes = parameterTypes ?? EmptyList<ITypeReference>.Instance;
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                }
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                public ITypeReference DeclaringTypeReference {
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                        get { return typeReference; }
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                }
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                public IMember Resolve(ITypeResolveContext context)
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                {
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                        IType type = typeReference.Resolve(context);
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                        IEnumerable<IMember> members;
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                        if (entityType == EntityType.Method) {
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                                members = type.GetMethods(
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                                        m => m.Name == name && m.EntityType == EntityType.Method
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                                        && m.TypeParameters.Count == typeParameterCount && !m.IsExplicitInterfaceImplementation,
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                                        GetMemberOptions.IgnoreInheritedMembers);
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                        } else {
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                                members = type.GetMembers(
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                                        m => m.Name == name && m.EntityType == entityType && !m.IsExplicitInterfaceImplementation,
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                                        GetMemberOptions.IgnoreInheritedMembers);
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                        }
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                        var resolvedParameterTypes = parameterTypes.Resolve(context);
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                        foreach (IMember member in members) {
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                                IParameterizedMember parameterizedMember = member as IParameterizedMember;
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                                if (parameterizedMember == null) {
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                                        if (parameterTypes.Count == 0)
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                                                return member;
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                                } else if (parameterTypes.Count == parameterizedMember.Parameters.Count) {
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                                        bool signatureMatches = true;
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                                        for (int i = 0; i < parameterTypes.Count; i++) {
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                                                IType type1 = DummyTypeParameter.NormalizeAllTypeParameters(resolvedParameterTypes[i]);
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                                                IType type2 = DummyTypeParameter.NormalizeAllTypeParameters(parameterizedMember.Parameters[i].Type);
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                                                if (!type1.Equals(type2)) {
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                                                        signatureMatches = false;
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                                                        break;
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                                                }
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                                        }
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                                        if (signatureMatches)
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                                                return member;
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                                }
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                        }
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                        return null;
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                }
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                void ISupportsInterning.PrepareForInterning(IInterningProvider provider)
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                {
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                        typeReference = provider.Intern(typeReference);
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                        name = provider.Intern(name);
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                        parameterTypes = provider.InternList(parameterTypes);
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                }
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                int ISupportsInterning.GetHashCodeForInterning()
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                {
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                        return (int)entityType ^ typeReference.GetHashCode() ^ name.GetHashCode() ^ parameterTypes.GetHashCode();
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                }
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                bool ISupportsInterning.EqualsForInterning(ISupportsInterning other)
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                {
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                        DefaultMemberReference o = other as DefaultMemberReference;
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                        return o != null && entityType == o.entityType && typeReference == o.typeReference && name == o.name && parameterTypes == o.parameterTypes;
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                }
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        }
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}