From a95e08e48c2d1f68693609627c6d6f52c6982264 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Wed, 13 May 2009 06:14:40 +0000
Subject: Generic simple query system for both objects and plugins.

git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@1997 a436a847-0d15-0410-975c-d299462d15a1
---
 src/engine/events/RequestMetadataEvent.cpp | 43 +++++++++++++++++-------------
 1 file changed, 25 insertions(+), 18 deletions(-)

(limited to 'src/engine/events/RequestMetadataEvent.cpp')

diff --git a/src/engine/events/RequestMetadataEvent.cpp b/src/engine/events/RequestMetadataEvent.cpp
index cf8a127a..14cbcfb3 100644
--- a/src/engine/events/RequestMetadataEvent.cpp
+++ b/src/engine/events/RequestMetadataEvent.cpp
@@ -23,6 +23,7 @@
 #include "EngineStore.hpp"
 #include "ClientBroadcaster.hpp"
 #include "PortImpl.hpp"
+#include "PluginImpl.hpp"
 #include "AudioBuffer.hpp"
 
 using namespace std;
@@ -36,15 +37,16 @@ using namespace Shared;
 RequestMetadataEvent::RequestMetadataEvent(Engine&              engine,
 	                                       SharedPtr<Responder> responder,
 	                                       SampleCount          timestamp,
-	                                       bool                 property,
-	                                       const Path&          node_path,
+	                                       bool                 is_property,
+	                                       const URI&           subject,
 	                                       const URI&           key)
 	: QueuedEvent(engine, responder, timestamp)
+	, _error(NO_ERROR)
 	, _special_type(NONE)
-	, _path(node_path)
-	, _property(property)
+	, _uri(subject)
 	, _key(key)
-	, _object(NULL)
+	, _resource(0)
+	, _is_property(is_property)
 {
 }
 
@@ -52,9 +54,14 @@ RequestMetadataEvent::RequestMetadataEvent(Engine&              engine,
 void
 RequestMetadataEvent::pre_process()
 {
+	const bool is_object = (_uri.scheme() == Path::scheme && Path::is_valid(_uri.str()));
 	if (_responder->client()) {
-		_object = _engine.engine_store()->find_object(_path);
-		if (_object == NULL) {
+		if (is_object)
+			_resource = _engine.engine_store()->find_object(Path(_uri.str()));
+		else
+			_resource = _engine.node_factory()->plugin(_uri);
+
+		if (!_resource) {
 			QueuedEvent::pre_process();
 			return;
 		}
@@ -62,10 +69,10 @@ RequestMetadataEvent::pre_process()
 
 	if (_key.str() == "ingen:value")
 		_special_type = PORT_VALUE;
-	else if (_property)
-		_value = _object->get_property(_key);
+	else if (!is_object || _is_property)
+		_value = _resource->get_property(_key);
 	else
-		_value = _object->get_variable(_key);
+		_value = dynamic_cast<GraphObjectImpl*>(_resource)->get_variable(_key);
 	
 	QueuedEvent::pre_process();
 }
@@ -76,12 +83,12 @@ RequestMetadataEvent::execute(ProcessContext& context)
 {
 	QueuedEvent::execute(context);
 	if (_special_type == PORT_VALUE) {
-		PortImpl* port = dynamic_cast<PortImpl*>(_object);
+		PortImpl* port = dynamic_cast<PortImpl*>(_resource);
 		if (port) {
 			if (port->type() == DataType::CONTROL || port->type() == DataType::AUDIO)
 				_value = ((AudioBuffer*)port->buffer(0))->value_at(0); // TODO: offset
 		} else {
-			_object = 0;
+			_resource = 0;
 		}
 	}
 }
@@ -92,19 +99,19 @@ RequestMetadataEvent::post_process()
 {
 	if (_responder->client()) {
 		if (_special_type == PORT_VALUE) {
-			if (_object) {
+			if (_resource) {
 				_responder->respond_ok();
-				_responder->client()->set_port_value(_path, _value);
+				_responder->client()->set_port_value(_uri.str(), _value);
 			} else {
-				const string msg = "Get value for non-port " + _path.str();
+				const string msg = "Get value for non-port " + _uri.str();
 				_responder->respond_error(msg);
 			}
-		} else if (!_object) {
-			const string msg = "Unable to find variable subject " + _path.str();
+		} else if (!_resource) {
+			const string msg = "Unable to find subject " + _uri.str();
 			_responder->respond_error(msg);
 		} else {
 			_responder->respond_ok();
-			_responder->client()->set_variable(_path, _key, _value);
+			_responder->client()->set_variable(_uri, _key, _value);
 		}
 	} else {
 		_responder->respond_error("Unknown client");
-- 
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