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using System;
using System.Runtime.InteropServices;
using System.Reflection.Emit;
using DBus;
namespace DBus.DBusType
{
/// <summary>
/// An object path.
/// </summary>
public class ObjectPath : IDBusType
{
public const char Code = 'o';
private string pathName = null;
private object val = null;
private Service service = null;
private ObjectPath()
{
}
public ObjectPath(object val)
{
this.val = val;
}
public ObjectPath(IntPtr iter)
{
this.pathName = Marshal.PtrToStringAnsi(dbus_message_iter_get_object_path(iter));
}
public void SetService(Service service)
{
this.service = service;
}
private string PathName
{
get {
if (this.pathName == null && this.val != null) {
Handler handler = this.service.GetHandler(this.val);
this.pathName = handler.PathName;
}
return this.pathName;
}
}
public void Append(IntPtr iter)
{
if (PathName == null) {
throw new ApplicationException("Unable to append ObjectPath before calling SetService()");
}
if (!dbus_message_iter_append_object_path(iter, Marshal.StringToHGlobalAnsi(PathName)))
throw new ApplicationException("Failed to append OBJECT_PATH argument:" + val);
}
public static bool Suits(System.Type type)
{
object[] attributes = type.GetCustomAttributes(typeof(InterfaceAttribute), false);
if (attributes.Length == 1) {
return true;
} else {
return false;
}
}
public static void EmitMarshalIn(ILGenerator generator, Type type)
{
if (type.IsByRef) {
generator.Emit(OpCodes.Ldind_Ref);
}
}
public static void EmitMarshalOut(ILGenerator generator, Type type, bool isReturn)
{
generator.Emit(OpCodes.Castclass, type);
if (!isReturn) {
generator.Emit(OpCodes.Stind_Ref);
}
}
public object Get()
{
throw new ArgumentException("Cannot call Get on an ObjectPath without specifying type.");
}
public object Get(System.Type type)
{
if (this.service == null) {
throw new ApplicationException("Unable to get ObjectPath before calling SetService()");
}
try {
return this.service.GetObject(type, PathName);
} catch(Exception ex) {
throw new ArgumentException("Cannot cast object pointed to by Object Path to type '" + type.ToString() + "': " + ex);
}
}
[DllImport("dbus-1")]
private extern static IntPtr dbus_message_iter_get_object_path(IntPtr iter);
[DllImport("dbus-1")]
private extern static bool dbus_message_iter_append_object_path(IntPtr iter, IntPtr pathName);
}
}
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