DefaultGraphCell cell = m_jgAdapter.getVertexCell(vertex);
AttributeMap attr = cell.getAttributes();
GraphConstants.setBackground(attr, GREEN_NODE_COLOR);
AttributeMap cellAttr = new AttributeMap();
cellAttr.put(cell, attr);
m_jgAdapter.edit(cellAttr, null, null, null);
} else if(vertex.indexOf("PathIndexAccessExpr") > 0) {
DefaultGraphCell cell = m_jgAdapter.getVertexCell(vertex);
AttributeMap attr = cell.getAttributes();
GraphConstants.setBackground(attr, BLUE_NODE_COLOR);
AttributeMap cellAttr = new AttributeMap();