fiore@3: #include "CollectionsManager.h"
fiore@3: 
fiore@3: void CollectionsManager::init(void){
fiore@3: 	/**************** init jni variables **********************/
fiore@3: 	
fiore@3: 	// --- classes --- 
fiore@3: 	// get the java haptics class 
fiore@3: 	hapticClass = env->GetObjectClass(*haptics);
fiore@3: 	if(hapticClass == NULL){
fiore@3: 		stopExecution("Could not find the Haptics class");
fiore@3: 	}
fiore@3: 
fiore@3: 	bitsetClass = env->FindClass("Ljava/util/BitSet;");
fiore@3: 	if(bitsetClass == NULL)
fiore@3: 		stopExecution("failed to find bitset class");
fiore@3: 
fiore@3: 	//get the node list class 
fiore@3: 	listClass = env->FindClass("Ljava/util/ArrayList;");
fiore@3: 	if(listClass == NULL)
fiore@3: 		stopExecution("failed to find list class");
fiore@3: 
fiore@3: 	// get the Node class to call the get method on the node list 
fiore@3: 	hapticNodeClass = env->FindClass("Luk/ac/qmul/eecs/ccmi/haptics/Node;");
fiore@3: 	if(hapticNodeClass == NULL){
fiore@3: 		stopExecution("Could not find the Node class");
fiore@3: 	}
fiore@3: 
fiore@3: 	// get the Edge class to call the get method on the edge list 
fiore@3: 	hapticEdgeClass = env->FindClass("Luk/ac/qmul/eecs/ccmi/haptics/Edge;");
fiore@3: 	if(hapticEdgeClass == NULL){
fiore@3: 		stopExecution("Could not find the Edge class");
fiore@3: 	}
fiore@3: 	// --- methods ---
fiore@3: 	// "get" method id 
fiore@3: 	getMethodId = env->GetMethodID(listClass, "get", "(I)Ljava/lang/Object;");
fiore@3: 	if(getMethodId == NULL)
fiore@3: 		stopExecution("Could not retrieve the get method id");
fiore@3: 
fiore@3: 	//size method id
fiore@3: 	sizeMethodId = env->GetMethodID(listClass, "size", "()I");
fiore@3: 	if(sizeMethodId == NULL)
fiore@3: 		stopExecution("failed to get size method id");
fiore@3: 
fiore@3: 	//get method of the BitSet class
fiore@3: 	getBitMethodId = env->GetMethodID(bitsetClass, "get","(I)Z");
fiore@3: 	if(getBitMethodId == NULL)
fiore@3: 		stopExecution("failed to get the get method id of the BitSet class");
fiore@3: 
fiore@3: 	getNodeFromIDMethodId = env->GetMethodID(hapticClass,"getNodeFromID","(I)Luk/ac/qmul/eecs/ccmi/haptics/Node;");
fiore@3: 	if(getNodeFromIDMethodId == NULL){
fiore@3: 		stopExecution("failed to get getNodeFromID of the Haptics class");
fiore@3: 	}
fiore@3: 
fiore@3: 	getEdgeFromIDMethodId = env->GetMethodID(hapticClass,"getEdgeFromID","(I)Luk/ac/qmul/eecs/ccmi/haptics/Edge;"); 
fiore@3: 	if(getEdgeFromIDMethodId == NULL){
fiore@3: 		stopExecution("failed to get getEdgeFromID of the Haptics class");
fiore@3: 	}
fiore@3: 
fiore@3: 	// -- field id's --
fiore@3: 	//retrieve edgeList field id
fiore@3: 	edgeListfieldId = env->GetFieldID(hapticClass,"currentEdges", "Ljava/util/ArrayList;");
fiore@3: 	if(edgeListfieldId == NULL){
fiore@3: 		stopExecution("failed to find the edge list field id"); 
fiore@3: 	}
fiore@3: 	
fiore@3: 	//retrieve nodeList field id
fiore@3: 	nodeListfieldId = env->GetFieldID(hapticClass,"currentNodes", "Ljava/util/ArrayList;");
fiore@3: 	if(nodeListfieldId == NULL){
fiore@3: 		stopExecution("failed to find the node list field id");
fiore@3: 	}
fiore@3: 
fiore@3: 	// Node fields id's 
fiore@3: 	xFieldId = env->GetFieldID(hapticNodeClass,"x","D");
fiore@3: 	if(xFieldId == NULL)
fiore@3: 		stopExecution("Could not find the x field ID");
fiore@3: 	
fiore@3: 
fiore@3: 	yFieldId = env->GetFieldID(hapticNodeClass,"y","D");
fiore@3: 	if(yFieldId == NULL)
fiore@3: 		stopExecution("Could not find the y field ID");
fiore@3: 	
fiore@3: 	nodeHapticIdFieldId = env->GetFieldID(hapticNodeClass, "hapticId", "I");
fiore@3: 	if(nodeHapticIdFieldId == NULL)
fiore@3: 		stopExecution("Could not find the node hapticId field ID");
fiore@3: 
fiore@3: 	nodeDiagramIdFieldId = env->GetFieldID(hapticNodeClass, "diagramId", "I");
fiore@3: 	if(nodeDiagramIdFieldId == NULL) 
fiore@3: 		stopExecution("Could not find the node diagramId field ID");
fiore@3: 	
fiore@3: 	// Edge field id's
fiore@3: 	// edge.hapticId
fiore@3: 	edgeHapticIdFieldId = env->GetFieldID(hapticEdgeClass, "hapticId", "I");
fiore@3: 	if(edgeHapticIdFieldId == NULL)
fiore@3: 		stopExecution("Could not find the edge hapticId field ID");
fiore@3: 
fiore@3: 	edgeDiagramIdFieldId = env->GetFieldID(hapticEdgeClass, "diagramId", "I");
fiore@3: 	if(edgeDiagramIdFieldId == NULL)
fiore@3: 		stopExecution("Could not find the edge diagramId field ID");
fiore@3: 
fiore@3: 	// stipplePattern
fiore@3: 	stipplePatternfieldId = env->GetFieldID(hapticEdgeClass, "stipplePattern", "I");
fiore@3: 	if(stipplePatternfieldId == NULL){
fiore@3: 		stopExecution("Could not find the stipplePattern field ID");
fiore@3: 	}
fiore@3: 
fiore@3: 	edgeSizefieldId = env->GetFieldID(hapticEdgeClass, "size", "I");
fiore@3: 	if(edgeSizefieldId == NULL)
fiore@3: 		stopExecution("Could not find edge size field ID");
fiore@3: 
fiore@3: 	edgeXsFieldId = env->GetFieldID(hapticEdgeClass,"xs", "[D");
fiore@3: 	if(edgeXsFieldId == NULL)
fiore@3: 		stopExecution("Could not find edge xs field ID");
fiore@3: 	
fiore@3: 	edgeYsFieldId = env->GetFieldID(hapticEdgeClass,"ys", "[D");
fiore@3: 	if(edgeYsFieldId == NULL)
fiore@3: 		stopExecution("Could not find edge ys field ID");
fiore@3: 
fiore@3: 	edgeAdjMatrixFieldId = env->GetFieldID(hapticEdgeClass,"adjMatrix", "[Ljava/util/BitSet;");
fiore@3: 	if(edgeAdjMatrixFieldId == NULL)
fiore@3: 		stopExecution("Could not find edge adjMatrix field ID");
fiore@3: 
fiore@3: 	attractPointXFieldId = env->GetFieldID(hapticEdgeClass, "attractPointX", "D");
fiore@3: 	if(attractPointXFieldId == NULL) 
fiore@3: 		stopExecution("Could not find the edge attractPointX field ID");
fiore@3: 
fiore@3: 	attractPointYFieldId = env->GetFieldID(hapticEdgeClass, "attractPointY", "D");
fiore@3: 	if(attractPointYFieldId == NULL) 
fiore@3: 		stopExecution("Could not find the edge attractPointY field ID");
fiore@3: 
fiore@3: 	edgeNodeStartFieldId = env->GetFieldID(hapticEdgeClass, "nodeStart", "I");
fiore@3: 	if(edgeNodeStartFieldId == NULL)
fiore@3: 		stopExecution("Could not find the edge nodeStart field ID");
fiore@3: }
fiore@3: 
fiore@3: const jint CollectionsManager::getNodesNum() {
fiore@3: 	/* to read the node list field into the nodeList variable each time we get the size 
fiore@3: 	 * is needed as, when the tab is switched the nodeList variables still points to the 
fiore@3: 	 * previuos tab's node list. We do it only here and not in getNodeData because
fiore@3: 	 * getNodesData follows this call before releasing the monitor, therefore 
fiore@3: 	 * data integrity is granted. 
fiore@3: 	 */
fiore@3: 	env->DeleteLocalRef(nodeList);
fiore@3: 	nodeList = env->GetObjectField(*haptics, nodeListfieldId);
fiore@3: 	if(nodeList == NULL){
fiore@3: 		stopExecution("could not get the node list field of Haptic Class");
fiore@3: 	}
fiore@3: 
fiore@3: 	jint size =  env->CallIntMethod( nodeList, sizeMethodId);
fiore@3: 	checkExceptions(env,"Could not call ArrayList<Node>.size()");
fiore@3: 	return size;
fiore@3: }
fiore@3: 
fiore@3: const jint CollectionsManager::getEdgesNum(){
fiore@3: 	env->DeleteLocalRef(edgeList);
fiore@3: 	edgeList = env->GetObjectField(*haptics, edgeListfieldId);
fiore@3: 	if(edgeList == NULL){
fiore@3: 		stopExecution("could not get the edge list field of Haptic Class");
fiore@3: 	}
fiore@3: 
fiore@3: 	jint size = env->CallIntMethod( edgeList, sizeMethodId);
fiore@3: 	checkExceptions(env, "Could not call ArrayList<Edge>.size()");
fiore@3: 	return size;
fiore@3: }
fiore@3: 
fiore@3: CollectionsManager::NodeData & CollectionsManager::getNodeData(const int i){
fiore@3: 	// get the i-th node
fiore@3: 	jobject currentNode = env->CallObjectMethod(nodeList,getMethodId,i);
fiore@3: 	checkExceptions(env,"Could not call ArrayList<Node>.size()");
fiore@3: 	fillupNodeData(nd,currentNode); 
fiore@3: 	env->DeleteLocalRef(currentNode);
fiore@3: 	return nd;
fiore@3: }
fiore@3: 
fiore@3: CollectionsManager::EdgeData & CollectionsManager::getEdgeData(const int i){
fiore@3: 	/* first we look for the i-th edge in the Haptics java class. Once we get it, 
fiore@3: 	 * we need all the coordinates of the node this edge is connecting, so that we 
fiore@3: 	 * can draw it. The edge mantains a list of references to such nodes.
fiore@3: 	 */
fiore@3: 
fiore@3: 	// get the i-th edge
fiore@3: 	jobject currentEdge = env->CallObjectMethod(edgeList,getMethodId,i);
fiore@3: 	checkExceptions(env, "Could not call ArrayList<Edge>.get(int) in the haptics edges");
fiore@3: 	if(currentEdge == NULL)
fiore@3: 		stopExecution("Could not find get current Edge");
fiore@3: 	jint size = env->GetIntField(currentEdge, edgeSizefieldId);
fiore@3: 	ed.setSize(size); 
fiore@3: 	fillupEdgeData(ed,currentEdge);	
fiore@3: 	env->DeleteLocalRef(currentEdge);
fiore@3: 	return ed;
fiore@3: }
fiore@3: 
fiore@3: bool CollectionsManager::isNode(const jint id) const{
fiore@3: 	if(env->MonitorEnter(*haptics) != JNI_OK){
fiore@3: 		throw(NULL);
fiore@3: 	}
fiore@3: 	jobject currentNode = env->CallObjectMethod(*haptics,getNodeFromIDMethodId,id);
fiore@3: 	checkExceptions(env, "Could not call Haptics.getNodeFromIDMethodId in CollectionsManager::isNode");
fiore@3: 	bool retVal = (currentNode != NULL);
fiore@3: 	env->DeleteLocalRef(currentNode);
fiore@3: 	if(env->MonitorExit(*haptics) != JNI_OK){
fiore@3: 		throw(NULL);
fiore@3: 	}
fiore@3: 	return retVal;
fiore@3: }
fiore@3: 
fiore@3: CollectionsManager::NodeData & CollectionsManager::getNodeDataFromID(const jint id){
fiore@3: 	if(env->MonitorEnter(*haptics) != JNI_OK){
fiore@3: 		throw(NULL);
fiore@3: 	}
fiore@3: 	jobject currentNode = env->CallObjectMethod(*haptics,getNodeFromIDMethodId,id);
fiore@3: 	checkExceptions(env, "Could not call Haptics.getNodeFromIDMethodId in CollectionsManager::getNodeDataFromID");
fiore@3: 	if(currentNode == NULL){
fiore@3: 		env->DeleteLocalRef(currentNode);
fiore@3: 		throw(NULL);
fiore@3: 	}
fiore@3: 	fillupNodeData(nd,currentNode);
fiore@3: 	env->DeleteLocalRef(currentNode);
fiore@3: 	if(env->MonitorExit(*haptics) != JNI_OK){
fiore@3: 		throw(NULL);
fiore@3: 	}
fiore@3: 	return nd;
fiore@3: }
fiore@3: 
fiore@3: bool CollectionsManager::isEdge(const jint id) const{
fiore@3: 	if(env->MonitorEnter(*haptics) != JNI_OK){
fiore@3: 		throw(NULL);
fiore@3: 	}
fiore@3: 	jobject currentEdge = env->CallObjectMethod(*haptics,getEdgeFromIDMethodId,id);
fiore@3: 	checkExceptions(env, "Could not call Haptics.getEdgeFromIDMethodId in CollectionsManager::isEdge");
fiore@3: 	bool retVal = (currentEdge != NULL);
fiore@3: 	env->DeleteLocalRef(currentEdge);
fiore@3: 	if(env->MonitorExit(*haptics) != JNI_OK){
fiore@3: 		throw(NULL);
fiore@3: 	}
fiore@3: 	return retVal;
fiore@3: }
fiore@3: 
fiore@3: CollectionsManager::EdgeData & CollectionsManager::getEdgeDataFromID(const jint id){
fiore@3: 	if(env->MonitorEnter(*haptics) != JNI_OK){
fiore@3: 		throw(NULL);
fiore@3: 	}
fiore@3: 	jobject currentEdge = env->CallObjectMethod(*haptics,getEdgeFromIDMethodId,id);
fiore@3: 	checkExceptions(env, "Could not call Haptics.getEdgeFromIDMethodId in CollectionsManager::getEdgeDataFromID");
fiore@3: 	if(currentEdge == NULL){
fiore@3: 		env->DeleteLocalRef(currentEdge);
fiore@3: 		throw(NULL);	
fiore@3: 	}
fiore@3: 
fiore@3: 	jint size = env->GetIntField(currentEdge, edgeSizefieldId);
fiore@3: 	ed.setSize(size); 
fiore@3: 	fillupEdgeData(ed,currentEdge);
fiore@3: 	env->DeleteLocalRef(currentEdge);
fiore@3: 	if(env->MonitorExit(*haptics) != JNI_OK){
fiore@3: 		throw(NULL);
fiore@3: 	}
fiore@3: 	return ed;
fiore@3: }
fiore@3: 
fiore@3: void CollectionsManager::fillupNodeData(NodeData & nd, jobject & currentNode){
fiore@3: 	//reads the fields of the current node 
fiore@3: 	nd.x = env->GetDoubleField(currentNode,xFieldId);
fiore@3: 	nd.y = env->GetDoubleField(currentNode,yFieldId);
fiore@3: 	hduVector3Dd glCoordinatePosition;
fiore@3:     // takes coordinates from the screen. Needs to convert the y axis as in openGL (0,0) = bottom left corner
fiore@3: 	fromScreen(hduVector3Dd(nd.x, screenHeight - nd.y, 0),glCoordinatePosition);
fiore@3: 	nd.x = glCoordinatePosition[0];
fiore@3: 	nd.y = glCoordinatePosition[1];
fiore@3: 	nd.hapticId = env->GetIntField(currentNode, nodeHapticIdFieldId);
fiore@3: 	nd.diagramId = env->GetIntField(currentNode, nodeDiagramIdFieldId);
fiore@3: }
fiore@3: 
fiore@3: void CollectionsManager::fillupEdgeData(EdgeData & ed, jobject & currentEdge){
fiore@3: 	/* get the array of x coordinates */
fiore@3: 	jobject xsAsObj = env->GetObjectField(currentEdge,edgeXsFieldId);
fiore@3: 	if(xsAsObj == NULL)
fiore@3: 		stopExecution("Cannot get the xs field");
fiore@3: 	jdoubleArray *jxs = reinterpret_cast<jdoubleArray*>(&xsAsObj);
fiore@3: 	double * xs = env->GetDoubleArrayElements(*jxs, NULL);
fiore@3: 	if(xs == NULL)
fiore@3: 		stopExecution("Cannot get the xs field array of double");
fiore@3: 
fiore@3: 	/* get the array of y coordinates */
fiore@3: 	jobject ysAsObj = env->GetObjectField(currentEdge,edgeYsFieldId);
fiore@3: 	if(ysAsObj == NULL)
fiore@3: 		stopExecution("Cannot get the xs field");
fiore@3: 		
fiore@3: 	jdoubleArray *jys = reinterpret_cast<jdoubleArray*>(&ysAsObj);
fiore@3: 	double * ys = env->GetDoubleArrayElements(*jys, NULL);
fiore@3: 	if(ys == NULL)
fiore@3: 		stopExecution("Cannot get the ys field array of double");
fiore@3: 	// copy the data into the edgeData object
fiore@3: 	for(unsigned int i=0; i<ed.getSize(); i++){ 
fiore@3: 		ed.x[i] = xs[i];
fiore@3: 		ed.y[i] = ys[i];
fiore@3: 		// takes coordinates from the screen (needs to convert the y axis as in openGL 0 = bottom left corner
fiore@3: 		hduVector3Dd glCoordinatePosition;
fiore@3: 		fromScreen(hduVector3Dd(ed.x[i], screenHeight - ed.y[i], 0),glCoordinatePosition);
fiore@3: 		ed.x[i] = glCoordinatePosition[0];
fiore@3: 		ed.y[i] = glCoordinatePosition[1];
fiore@3: 	}
fiore@3: 	env->ReleaseDoubleArrayElements(*jxs, xs, 0);
fiore@3: 	env->ReleaseDoubleArrayElements(*jys, ys, 0);
fiore@3: 	env->DeleteLocalRef(xsAsObj);
fiore@3: 	env->DeleteLocalRef(ysAsObj);
fiore@3: 	jobject adjMatrixAsObj = env->GetObjectField(currentEdge, edgeAdjMatrixFieldId);
fiore@3: 	if(adjMatrixAsObj == NULL)
fiore@3: 		stopExecution("Cannot get the adjMatrix field");
fiore@3: 	jobjectArray *jadjMatrix = reinterpret_cast<jobjectArray*>(&adjMatrixAsObj);
fiore@3: 	
fiore@3: 	for(unsigned int i=0; i<ed.getSize(); i++){
fiore@3: 		jobject adjMatrixBitSet = env->GetObjectArrayElement(*jadjMatrix,i);
fiore@3: 		if(adjMatrixBitSet == NULL)
fiore@3: 			stopExecution("Cannot get the adjMatrix field array element");
fiore@3: 		for(unsigned int j=0;j<ed.getSize(); j++){
fiore@3: 			jboolean b = env->CallBooleanMethod(adjMatrixBitSet,getBitMethodId,j);
fiore@3: 			checkExceptions(env,"Could not call BitSet.get()");
fiore@3: 			if(b == JNI_TRUE)
fiore@3: 				ed.adjMatrix[i][j] = true;
fiore@3: 			else
fiore@3: 				ed.adjMatrix[i][j] = false;
fiore@3: 		}
fiore@3: 		env->DeleteLocalRef(adjMatrixBitSet);
fiore@3: 	}	
fiore@3: 	env->DeleteLocalRef(adjMatrixAsObj);
fiore@3: 
fiore@3: 	// set the haptic id used by the haptic device 
fiore@3: 	ed.hapticId = env->GetIntField(currentEdge, edgeHapticIdFieldId);
fiore@3: 	// set the diagram id used in the java thread
fiore@3: 	ed.diagramId = env->GetIntField(currentEdge, edgeDiagramIdFieldId);
fiore@3: 	// set the stipple pattern 
fiore@3: 	ed.stipplePattern = env->GetIntField(currentEdge, stipplePatternfieldId);
fiore@3: 	// set the attract point
fiore@3: 	ed.attractPoint[0] = env->GetDoubleField(currentEdge, attractPointXFieldId);
fiore@3: 	ed.attractPoint[1] = env->GetDoubleField(currentEdge, attractPointYFieldId);
fiore@3: 	hduVector3Dd glCoordinatePosition;
fiore@3: 	fromScreen(hduVector3Dd(ed.attractPoint[0], screenHeight - ed.attractPoint[1], 0),glCoordinatePosition);
fiore@3: 	ed.attractPoint[0] = glCoordinatePosition[0];
fiore@3: 	ed.attractPoint[1] = glCoordinatePosition[1];
fiore@3: 	//set the index from which the nodes start in the adjMatrix
fiore@3: 	ed.nodeStart = env->GetIntField(currentEdge, edgeNodeStartFieldId);
fiore@3: }