summaryrefslogtreecommitdiffstats
path: root/mcop/dynamicrequest.cc
blob: d6a204df155efe94da6b2a2d2493314c371ce751 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
    /*

    Copyright (C) 2000 Stefan Westerfeld
                       stefan@space.twc.de

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.
  
    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.
   
    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.

    */

#include "dynamicrequest.h"
#include "common.h"
#include "debug.h"
#include <iostream>

using namespace Arts;
using namespace std;

class Arts::DynamicRequestPrivate {
public:
	Connection *connection;
	Buffer *buffer;
	MethodDef method;
	Object object;

	/**
	 * methodID is kept between the requests, so that we don't need to lookup
	 * a method again when it gets called twice - the value for "we need to
	 * lookup again" is -1, which gets set whenever the current request differs
	 * from the last
	 */
	long requestID, methodID, objectID;
	unsigned long paramCount;

	/**
	 * constructor
	 */
	DynamicRequestPrivate(const Object &obj)
		: buffer(0), object(obj), methodID(-1)
	{
	}
};

DynamicRequest::DynamicRequest(const Object& obj)
{
	d = new DynamicRequestPrivate(obj);
	d->connection = obj._base()->_connection;
	d->objectID = obj._base()->_objectID;
}

DynamicRequest::~DynamicRequest()
{
	delete d;
}

DynamicRequest& DynamicRequest::method(const string& method)
{
	assert(!d->buffer);

	// methodID will be set later
	d->buffer = Dispatcher::the()->createRequest(d->requestID, d->objectID, 0);

	if(d->method.name != method)
	{
		d->method.name = method;
		d->methodID = -1;
	}
	d->paramCount = 0;
	return *this;
}

DynamicRequest& DynamicRequest::param(const AnyConstRef& ref)
{
	if(d->paramCount == d->method.signature.size())
	{
		ParamDef pd;
		pd.type = ref.type();
		d->method.signature.push_back(pd);
	}
	else
	{
		if(d->method.signature[d->paramCount].type != ref.type())
		{
			d->method.signature[d->paramCount].type = ref.type();
			d->methodID = -1;
		}
	}
	d->paramCount++;
	ref.write(d->buffer);
	return *this;
}

bool DynamicRequest::invoke()
{
	AnyRef voidReference;
	return invoke(voidReference);
}

bool DynamicRequest::invoke(const AnyRef& returnCode)
{
	if(d->method.type != returnCode.type())
	{
		d->method.type = returnCode.type();
		d->methodID = -1;
	}
	if(d->method.signature.size() != d->paramCount)
		d->methodID = -1;

	/*
	 * need to lookup method? (if the requested method is exactly the
	 * same as the last, we need not, which signigicantly improves performance
	 */
	if(d->methodID == -1)
	{
		d->method.signature.resize(d->paramCount);
		d->methodID = d->object._lookupMethod(d->method);

		if(d->methodID == -1)
		{
			arts_warning("DynamicRequest: invalid method called");
			return false;
		}
	}


	d->buffer->patchLength();
	d->buffer->patchLong(16,d->methodID);
	d->connection->qSendBuffer(d->buffer);
	d->buffer = 0;

	Buffer *result =
		Dispatcher::the()->waitForResult(d->requestID,d->connection);

	if(result)
	{
		returnCode.read(result);
		delete result;
	}
	return result != 0;
}