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/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
using System;
using System.Text;
namespace uno
{
/** This class can be used as a base class for UNO objects.
It implements the capability to be kept weakly
(unoidl.com.sun.star.uno.XWeak) and it implements
unoidl.com.sun.star.lang.XTypeProvider which is necessary for
using the object from StarBasic.
*/
public struct Any
{
private object _value;
private Type _type;
public static Any VOID = new Any(typeof(void), null);
private static void checkArgs(Type type, Object value)
{
//value can only be null if type == void
if (type == null
|| (value == null
&& type != typeof(void)
&& type != typeof(object)
&& type.IsInterface == false))
throw new System.Exception(
"uno.Any: Constructor called with illegal arguments!");
//If value is a polymorphic struct then type must be
//uno.Polymorphic
if (value != null)
{
TypeParametersAttribute t = (TypeParametersAttribute) Attribute.GetCustomAttribute(
value.GetType(), typeof(TypeParametersAttribute));
if (t != null && !(type is PolymorphicType))
throw new System.Exception(
"uno.Any: The value has a polymorphic type but the type argument is not " +
"uno.PolymorphicType. Please use the constructor Any(Type, object) and " +
"supply a uno.PolymorphicType as type argument!");
}
}
/** constructs an instance.
<p>If the arguments are invalid then an exception is thrown.</p>
@exception System.Exception
*/
public Any(Type type, object value)
{
checkArgs(type, value);
_type = type;
_value = value;
}
/** sets the type and value.
<p>If the arguments ar invalid then an exception is thrown.</p>
@exception System.Exception
*/
public void setValue(Type type, object value)
{
checkArgs(type, value);
_type = type;
_value = value;
}
public Type Type
{
get
{
if (_type == null)
_type = typeof(void);
return _type;
}
}
public Object Value
{
get
{
return _value;
}
}
public Any(char value): this(typeof(char), value)
{
}
public Any(bool value): this(typeof(bool), value)
{
}
public Any(byte value): this(typeof(byte), value)
{
}
public Any(short value): this(typeof(short), value)
{
}
public Any(ushort value): this(typeof(ushort), value)
{
}
public Any(int value): this(typeof(int), value)
{
}
public Any(uint value): this(typeof(uint), value)
{
}
public Any(long value): this(typeof(long), value)
{
}
public Any(ulong value): this(typeof(ulong), value)
{
}
public Any(float value): this(typeof(float), value)
{
}
public Any(double value): this(typeof(double), value)
{
}
public Any(Type value): this(typeof(Type), value)
{
}
public Any(string value): this(typeof(string), value)
{
}
public override string ToString()
{
StringBuilder msg = new StringBuilder("uno.Any { Type= ");
msg.Append(Type.ToString());
msg.Append(", Value=");
msg.Append(Value.ToString());
msg.Append("}");
return msg.ToString();
}
public bool hasValue()
{
if (Type == null || Type == typeof(void))
return false;
return true;
}
public override bool Equals(object obj)
{
if (obj != null)
{
try
{
return Equals((Any) obj);
}
catch (InvalidCastException)
{
}
}
return false;
}
public bool Equals(Any obj)
{
return Type.Equals(obj.Type)
&& (Value == null ?
obj.Value == null :
Value.Equals(obj.Value));
}
public override int GetHashCode()
{
return Type.GetHashCode() ^ (Value != null ? Value.GetHashCode() : 0);
}
}
}
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