/**
* sets invisible nodes with visible edges connected to them visible these nodes exist because the
* setNodesAndEdgesVisible(...) method does not follow data flow ("DF") edges
*
* @param graph
*/
private void setIsolatedNodesVisible(Graph graph) {
Iterator graphNodes = graph.nodes();
TableNodeItem node;
while (graphNodes.hasNext()) {
node = (TableNodeItem) graphNodes.next();
if (!node.isVisible()) {
Iterator incidentEdges = node.edges();
int visibleEdges = 0;
while (incidentEdges.hasNext()) {
TableEdgeItem edge = (TableEdgeItem) incidentEdges.next();
if (edge.isVisible()) {
visibleEdges++;
}
}
if (visibleEdges != 0) {
node.setVisible(true);
Iterator edges = node.edges();
while (edges.hasNext()) {
TableEdgeItem edgeItem = (TableEdgeItem) (edges.next());
if (!edgeItem.getSourceItem().getString(TYPE).equals(STEP)
&& !edgeItem.getTargetItem().getString(TYPE).equals(STEP)) {
edgeItem.setVisible(true);
}
}
}
}
}
}
/**
* sets all nodes and incident edges between startNode and finishNode visible nodes must be
* connected through control flow ("CF") edge to their parent to be set visible
*
* @param startNode
* @param finishNode
* @param isFirstNode
*/
private void setNodesAndEdgesVisible(
TableNodeItem startNode, TableNodeItem finishNode, boolean isFirstNode) {
startNode.setVisible(true);
Iterator startNodeEdges;
if (isFirstNode) {
startNodeEdges = startNode.inEdges();
} else {
startNodeEdges = startNode.edges();
}
while (startNodeEdges.hasNext()) {
TableEdgeItem startNodeEdge = (TableEdgeItem) startNodeEdges.next();
if (!startNodeEdge.getString(TYPE).equals(STEP)
&& !(startNodeEdge.getTargetItem()).getString(TYPE).equals(STEP)
&& !(startNodeEdge.getSourceItem()).getString(TYPE).equals(STEP)) {
startNodeEdge.setVisible(true);
}
}
Iterator<TableNodeItem> startNodeChildren;
TableNodeItem child;
if (startNode != finishNode) {
startNodeChildren = children(startNode);
while (startNodeChildren.hasNext()) {
child = startNodeChildren.next();
if (checkInvisibleFlow(child, startNode) && !(child.isVisible())) {
setNodesAndEdgesVisible(child, finishNode, false);
}
}
}
}
/**
* sets nodes with no visible edges connected to them (isolated nodes) invisible these nodes exist
* because the setNodesAndEdgesInvisible(...) method does not follow data flow ("DF") edges
*
* @param graph
*/
private void setIsolatedNodesInvisible(Graph graph) {
Iterator graphNodes = graph.nodes();
TableNodeItem node;
boolean rootDrawn = false;
while (graphNodes.hasNext()) {
node = (TableNodeItem) graphNodes.next();
if (node.isVisible() && getOutVDegree(node) == 0 && rootDrawn) {
node.setVisible(false);
Iterator incidentEdges = node.edges();
while (incidentEdges.hasNext()) {
((TableEdgeItem) incidentEdges.next()).setVisible(false);
}
}
rootDrawn = true;
}
}
/**
* sets all nodes and incident edges between startNode and finishNode invisible nodes must be
* connected through control flow ("CF") edge or "Step" edge to their parent to be set invisible
*
* @param startNode
* @param finishNode
*/
private void setNodesAndEdgesInvisible(TableNodeItem startNode, TableNodeItem finishNode) {
startNode.setVisible(false);
Iterator startNodeEdges = startNode.edges();
while (startNodeEdges.hasNext()) {
TableEdgeItem startNodeEdge = (TableEdgeItem) startNodeEdges.next();
startNodeEdge.setVisible(false);
}
Iterator<TableNodeItem> startNodeChildren;
TableNodeItem startNodeChild;
if (startNode != finishNode) {
startNodeChildren = children(startNode);
while (startNodeChildren.hasNext()) {
startNodeChild = startNodeChildren.next();
if (checkFlow(startNodeChild, startNode) && startNodeChild.isVisible()) {
setNodesAndEdgesInvisible(startNodeChild, finishNode);
}
}
}
}
