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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
namespace System.Reflection.Emit
{
using System.Runtime.InteropServices;
using System;
using CultureInfo = System.Globalization.CultureInfo;
using System.Reflection;
using System.Diagnostics.Contracts;
public sealed class FieldBuilder : FieldInfo
{
#region Private Data Members
private int m_fieldTok;
private FieldToken m_tkField;
private TypeBuilder m_typeBuilder;
private String m_fieldName;
private FieldAttributes m_Attributes;
private Type m_fieldType;
#endregion
#region Constructor
internal FieldBuilder(TypeBuilder typeBuilder, String fieldName, Type type,
Type[] requiredCustomModifiers, Type[] optionalCustomModifiers, FieldAttributes attributes)
{
if (fieldName == null)
throw new ArgumentNullException(nameof(fieldName));
if (fieldName.Length == 0)
throw new ArgumentException(Environment.GetResourceString("Argument_EmptyName"), nameof(fieldName));
if (fieldName[0] == '\0')
throw new ArgumentException(Environment.GetResourceString("Argument_IllegalName"), nameof(fieldName));
if (type == null)
throw new ArgumentNullException(nameof(type));
if (type == typeof(void))
throw new ArgumentException(Environment.GetResourceString("Argument_BadFieldType"));
Contract.EndContractBlock();
m_fieldName = fieldName;
m_typeBuilder = typeBuilder;
m_fieldType = type;
m_Attributes = attributes & ~FieldAttributes.ReservedMask;
SignatureHelper sigHelp = SignatureHelper.GetFieldSigHelper(m_typeBuilder.Module);
sigHelp.AddArgument(type, requiredCustomModifiers, optionalCustomModifiers);
int sigLength;
byte[] signature = sigHelp.InternalGetSignature(out sigLength);
m_fieldTok = TypeBuilder.DefineField(m_typeBuilder.GetModuleBuilder().GetNativeHandle(),
typeBuilder.TypeToken.Token, fieldName, signature, sigLength, m_Attributes);
m_tkField = new FieldToken(m_fieldTok, type);
}
#endregion
#region Internal Members
internal void SetData(byte[] data, int size)
{
ModuleBuilder.SetFieldRVAContent(m_typeBuilder.GetModuleBuilder().GetNativeHandle(), m_tkField.Token, data, size);
}
#endregion
#region MemberInfo Overrides
internal int MetadataTokenInternal
{
get { return m_fieldTok; }
}
public override Module Module
{
get { return m_typeBuilder.Module; }
}
public override String Name
{
get {return m_fieldName; }
}
public override Type DeclaringType
{
get
{
if (m_typeBuilder.m_isHiddenGlobalType == true)
return null;
return m_typeBuilder;
}
}
public override Type ReflectedType
{
get
{
if (m_typeBuilder.m_isHiddenGlobalType == true)
return null;
return m_typeBuilder;
}
}
#endregion
#region FieldInfo Overrides
public override Type FieldType
{
get { return m_fieldType; }
}
public override Object GetValue(Object obj)
{
// NOTE!! If this is implemented, make sure that this throws
// a NotSupportedException for Save-only dynamic assemblies.
// Otherwise, it could cause the .cctor to be executed.
throw new NotSupportedException(Environment.GetResourceString("NotSupported_DynamicModule"));
}
public override void SetValue(Object obj,Object val,BindingFlags invokeAttr,Binder binder,CultureInfo culture)
{
// NOTE!! If this is implemented, make sure that this throws
// a NotSupportedException for Save-only dynamic assemblies.
// Otherwise, it could cause the .cctor to be executed.
throw new NotSupportedException(Environment.GetResourceString("NotSupported_DynamicModule"));
}
public override RuntimeFieldHandle FieldHandle
{
get { throw new NotSupportedException(Environment.GetResourceString("NotSupported_DynamicModule")); }
}
public override FieldAttributes Attributes
{
get { return m_Attributes; }
}
#endregion
#region ICustomAttributeProvider Implementation
public override Object[] GetCustomAttributes(bool inherit)
{
throw new NotSupportedException(Environment.GetResourceString("NotSupported_DynamicModule"));
}
public override Object[] GetCustomAttributes(Type attributeType, bool inherit)
{
throw new NotSupportedException(Environment.GetResourceString("NotSupported_DynamicModule"));
}
public override bool IsDefined(Type attributeType, bool inherit)
{
throw new NotSupportedException(Environment.GetResourceString("NotSupported_DynamicModule"));
}
#endregion
#region Public Members
public FieldToken GetToken()
{
return m_tkField;
}
public void SetOffset(int iOffset)
{
m_typeBuilder.ThrowIfCreated();
TypeBuilder.SetFieldLayoutOffset(m_typeBuilder.GetModuleBuilder().GetNativeHandle(), GetToken().Token, iOffset);
}
public void SetConstant(Object defaultValue)
{
m_typeBuilder.ThrowIfCreated();
TypeBuilder.SetConstantValue(m_typeBuilder.GetModuleBuilder(), GetToken().Token, m_fieldType, defaultValue);
}
public void SetCustomAttribute(ConstructorInfo con, byte[] binaryAttribute)
{
if (con == null)
throw new ArgumentNullException(nameof(con));
if (binaryAttribute == null)
throw new ArgumentNullException(nameof(binaryAttribute));
Contract.EndContractBlock();
ModuleBuilder module = m_typeBuilder.Module as ModuleBuilder;
m_typeBuilder.ThrowIfCreated();
TypeBuilder.DefineCustomAttribute(module,
m_tkField.Token, module.GetConstructorToken(con).Token, binaryAttribute, false, false);
}
public void SetCustomAttribute(CustomAttributeBuilder customBuilder)
{
if (customBuilder == null)
throw new ArgumentNullException(nameof(customBuilder));
Contract.EndContractBlock();
m_typeBuilder.ThrowIfCreated();
ModuleBuilder module = m_typeBuilder.Module as ModuleBuilder;
customBuilder.CreateCustomAttribute(module, m_tkField.Token);
}
#endregion
}
}
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