UI: Refactor entities hierarchy widget to use new WS data query API.

@@ -54,22 +54,6 @@
       }
       }
     },
     },
     {
     {
-      "alias": "entities_hierarchy",
-      "name": "Entities hierarchy",
-      "descriptor": {
-        "type": "latest",
-        "sizeX": 7.5,
-        "sizeY": 3.5,
-        "resources": [],
-        "templateHtml": "<tb-entities-hierarchy-widget \n    [ctx]=\"ctx\">\n</tb-entities-hierarchy-widget>",
-        "templateCss": "",
-        "controllerScript": "self.onInit = function() {\n}\n\nself.onDataUpdated = function() {\n    self.ctx.$scope.entitiesHierarchyWidget.onDataUpdated();\n}\n\nself.typeParameters = function() {\n    return {\n        dataKeysOptional: true\n    };\n}\n\nself.actionSources = function() {\n    return {\n        'nodeSelected': {\n            name: 'widget-action.node-selected',\n            multiple: false\n        }\n    };\n}\n\nself.onDestroy = function() {\n}\n",
-        "settingsSchema": "{\n    \"schema\": {\n        \"type\": \"object\",\n        \"title\": \"EntitiesHierarchySettings\",\n        \"properties\": {\n            \"nodeRelationQueryFunction\": {\n                \"title\": \"Node relations query function: f(nodeCtx)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            },\n            \"nodeHasChildrenFunction\": {\n                \"title\": \"Node has children function: f(nodeCtx)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            },\n            \"nodeOpenedFunction\": {\n                \"title\": \"Default node opened function: f(nodeCtx)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            },\n            \"nodeDisabledFunction\": {\n                \"title\": \"Node disabled function: f(nodeCtx)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            },\n            \"nodeIconFunction\": {\n                \"title\": \"Node icon function: f(nodeCtx)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            },\n            \"nodeTextFunction\": {\n                \"title\": \"Node text function: f(nodeCtx)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            },\n            \"nodesSortFunction\": {\n                \"title\": \"Nodes sort function: f(nodeCtx1, nodeCtx2)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            }\n        },\n        \"required\": []\n    },\n    \"form\": [\n        {\n            \"key\": \"nodeRelationQueryFunction\",\n            \"type\": \"javascript\"\n        },\n        {\n            \"key\": \"nodeHasChildrenFunction\",\n            \"type\": \"javascript\"\n        },\n        {\n            \"key\": \"nodeOpenedFunction\",\n            \"type\": \"javascript\"\n        },\n        {\n            \"key\": \"nodeDisabledFunction\",\n            \"type\": \"javascript\"\n        },\n        {\n            \"key\": \"nodeIconFunction\",\n            \"type\": \"javascript\"\n        },\n        {\n            \"key\": \"nodeTextFunction\",\n            \"type\": \"javascript\"\n        },\n        {\n            \"key\": \"nodesSortFunction\",\n            \"type\": \"javascript\"\n        }\n    ]\n}",
-        "dataKeySettingsSchema": "{\n    \"schema\": {\n        \"type\": \"object\",\n        \"title\": \"DataKeySettings\",\n        \"properties\": {},\n        \"required\": []\n    },\n    \"form\": []\n}",
-        "defaultConfig": "{\"timewindow\":{\"realtime\":{\"interval\":1000,\"timewindowMs\":86400000},\"aggregation\":{\"type\":\"NONE\",\"limit\":200}},\"showTitle\":true,\"backgroundColor\":\"rgb(255, 255, 255)\",\"color\":\"rgba(0, 0, 0, 0.87)\",\"padding\":\"4px\",\"settings\":{\"nodeRelationQueryFunction\":\"/**\\n\\n// Function should return relations query object for current node used to fetch entity children.\\n// Function can return 'default' string value. In this case default relations query will be used.\\n\\n// The following example code will construct simple relations query that will fetch relations of type 'Contains'\\n// from the current entity.\\n\\nvar entity = nodeCtx.entity;\\nvar query = {\\n    parameters: {\\n        rootId: entity.id.id,\\n        rootType: entity.id.entityType,\\n        direction: types.entitySearchDirection.from,\\n        relationTypeGroup: \\\"COMMON\\\",\\n        maxLevel: 1\\n    },\\n    filters: [{\\n        relationType: \\\"Contains\\\",\\n        entityTypes: []\\n    }]\\n};\\nreturn query;\\n\\n**/\\n\",\"nodeHasChildrenFunction\":\"/**\\n\\n// Function should return boolean value indicating whether current node has children (whether it can be expanded).\\n\\n// The following example code will restrict entities hierarchy expansion up to third level.\\n\\nreturn nodeCtx.level <= 2;\\n\\n// The next example code will restrict entities expansion according to the value of example 'nodeHasChildren' attribute.\\n\\nvar data = nodeCtx.data;\\nif (data.hasOwnProperty('nodeHasChildren') && data['nodeHasChildren'] !== null) {\\n    return data['nodeHasChildren'] === 'true';\\n} else {\\n    return true;\\n}\\n  \\n**/\\n \",\"nodeTextFunction\":\"/**\\n\\n// Function should return text (can be HTML code) for the current node.\\n\\n// The following example code will generate node text consisting of entity name and temperature if temperature value is present in entity attributes/timeseries.\\n\\nvar data =  nodeCtx.data;\\nvar entity = nodeCtx.entity;\\nvar text = entity.name;\\nif (data.hasOwnProperty('temperature') && data['temperature'] !== null) {\\n    text += \\\" <b>\\\"+ data['temperature'] +\\\" °C</b>\\\";\\n}\\nreturn text;\\n\\n**/\",\"nodeIconFunction\":\"/** \\n\\n// Function should return node icon info object.\\n// Resulting object should contain either 'materialIcon' or 'iconUrl' property. \\n// Where:\\n    - 'materialIcon' - name of the material icon to be used from the Material Icons Library (https://material.io/tools/icons);\\n    - 'iconUrl' - url of the external image to be used as node icon.\\n// Function can return 'default' string value. In this case default icons according to entity type will be used.\\n\\n// The following example code shows how to use external image for devices which name starts with 'Test' and use \\n// default icons for the rest of entities.\\n\\nvar entity = nodeCtx.entity;\\nif (entity.id.entityType === 'DEVICE' && entity.name.startsWith('Test')) {\\n    return {iconUrl: 'https://avatars1.githubusercontent.com/u/14793288?v=4&s=117'};\\n} else {\\n    return 'default';\\n}\\n \\n**/\",\"nodeDisabledFunction\":\"/**\\n\\n// Function should return boolean value indicating whether current node should be disabled (not selectable).\\n\\n// The following example code will disable current node according to the value of example 'nodeDisabled' attribute.\\n\\nvar data = nodeCtx.data;\\nif (data.hasOwnProperty('nodeDisabled') && data['nodeDisabled'] !== null) {\\n    return data['nodeDisabled'] === 'true';\\n} else {\\n    return false;\\n}\\n  \\n**/\\n\",\"nodesSortFunction\":\"/**\\n\\n// This function is used to sort nodes of the same level. Function should compare two nodes and return \\n// integer value: \\n//     - less than 0 - sort nodeCtx1 to an index lower than nodeCtx2\\n//     - 0 - leave nodeCtx1 and nodeCtx2 unchanged with respect to each other\\n//     - greater than 0 - sort nodeCtx2 to an index lower than nodeCtx1\\n\\n// The following example code will sort entities first by entity type in alphabetical order then\\n// by entity name in alphabetical order.\\n\\nvar result = nodeCtx1.entity.id.entityType.localeCompare(nodeCtx2.entity.id.entityType);\\nif (result === 0) {\\n    result = nodeCtx1.entity.name.localeCompare(nodeCtx2.entity.name);\\n}\\nreturn result;\\n  \\n**/\",\"nodeOpenedFunction\":\"/**\\n\\n// Function should return boolean value indicating whether current node should be opened (expanded) when it first loaded.\\n\\n// The following example code will open by default nodes up to third level.\\n\\nreturn nodeCtx.level <= 2;\\n\\n**/\\n \"},\"title\":\"Entities hierarchy\",\"dropShadow\":true,\"enableFullscreen\":true,\"titleStyle\":{\"fontSize\":\"16px\",\"fontWeight\":400,\"padding\":\"5px 10px 5px 10px\"},\"useDashboardTimewindow\":false,\"showLegend\":false,\"datasources\":[{\"type\":\"function\",\"name\":\"Simulated\",\"dataKeys\":[{\"name\":\"f(x)\",\"type\":\"function\",\"label\":\"Sin\",\"color\":\"#2196f3\",\"settings\":{\"columnWidth\":\"0px\",\"useCellStyleFunction\":false,\"cellStyleFunction\":\"\",\"useCellContentFunction\":false,\"cellContentFunction\":\"\"},\"_hash\":0.472295003170325,\"funcBody\":\"return Math.round(1000*Math.sin(time/5000));\"},{\"name\":\"f(x)\",\"type\":\"function\",\"label\":\"Cos\",\"color\":\"#4caf50\",\"settings\":{\"columnWidth\":\"0px\",\"useCellStyleFunction\":false,\"cellStyleFunction\":\"\",\"useCellContentFunction\":false,\"cellContentFunction\":\"\"},\"_hash\":0.8926244886945558,\"funcBody\":\"return Math.round(1000*Math.cos(time/5000));\"},{\"name\":\"f(x)\",\"type\":\"function\",\"label\":\"Random\",\"color\":\"#f44336\",\"settings\":{\"columnWidth\":\"0px\",\"useCellStyleFunction\":false,\"cellStyleFunction\":\"\",\"useCellContentFunction\":false,\"cellContentFunction\":\"\"},\"_hash\":0.6401141393938932,\"funcBody\":\"var value = prevValue + Math.random() * 100 - 50;\\nvar multiplier = Math.pow(10, 2 || 0);\\nvar value = Math.round(value * multiplier) / multiplier;\\nif (value < -1000) {\\n\\tvalue = -1000;\\n} else if (value > 1000) {\\n\\tvalue = 1000;\\n}\\nreturn value;\"}]}],\"widgetStyle\":{},\"actions\":{}}"
-      }
-    },
-    {
       "alias": "html_value_card",
       "alias": "html_value_card",
       "name": "HTML Value Card",
       "name": "HTML Value Card",
       "descriptor": {
       "descriptor": {
@@ -132,6 +116,22 @@
         "dataKeySettingsSchema": "{\n    \"schema\": {\n        \"type\": \"object\",\n        \"title\": \"DataKeySettings\",\n        \"properties\": {\n            \"columnWidth\": {\n                \"title\": \"Column width (px or %)\",\n                \"type\": \"string\",\n                \"default\": \"0px\"\n            },\n            \"useCellStyleFunction\": {\n                \"title\": \"Use cell style function\",\n                \"type\": \"boolean\",\n                \"default\": false\n            },\n            \"cellStyleFunction\": {\n                \"title\": \"Cell style function: f(value)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            },\n            \"useCellContentFunction\": {\n                \"title\": \"Use cell content function\",\n                \"type\": \"boolean\",\n                \"default\": false\n            },\n            \"cellContentFunction\": {\n                \"title\": \"Cell content function: f(value, entity, ctx)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            }\n        },\n        \"required\": []\n    },\n    \"form\": [\n        \"columnWidth\",\n        \"useCellStyleFunction\",\n        {\n            \"key\": \"cellStyleFunction\",\n            \"type\": \"javascript\"\n        },\n        \"useCellContentFunction\",\n        {\n            \"key\": \"cellContentFunction\",\n            \"type\": \"javascript\"\n        }\n    ]\n}",
         "dataKeySettingsSchema": "{\n    \"schema\": {\n        \"type\": \"object\",\n        \"title\": \"DataKeySettings\",\n        \"properties\": {\n            \"columnWidth\": {\n                \"title\": \"Column width (px or %)\",\n                \"type\": \"string\",\n                \"default\": \"0px\"\n            },\n            \"useCellStyleFunction\": {\n                \"title\": \"Use cell style function\",\n                \"type\": \"boolean\",\n                \"default\": false\n            },\n            \"cellStyleFunction\": {\n                \"title\": \"Cell style function: f(value)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            },\n            \"useCellContentFunction\": {\n                \"title\": \"Use cell content function\",\n                \"type\": \"boolean\",\n                \"default\": false\n            },\n            \"cellContentFunction\": {\n                \"title\": \"Cell content function: f(value, entity, ctx)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            }\n        },\n        \"required\": []\n    },\n    \"form\": [\n        \"columnWidth\",\n        \"useCellStyleFunction\",\n        {\n            \"key\": \"cellStyleFunction\",\n            \"type\": \"javascript\"\n        },\n        \"useCellContentFunction\",\n        {\n            \"key\": \"cellContentFunction\",\n            \"type\": \"javascript\"\n        }\n    ]\n}",
         "defaultConfig": "{\"timewindow\":{\"realtime\":{\"interval\":1000,\"timewindowMs\":86400000},\"aggregation\":{\"type\":\"NONE\",\"limit\":200}},\"showTitle\":true,\"backgroundColor\":\"rgb(255, 255, 255)\",\"color\":\"rgba(0, 0, 0, 0.87)\",\"padding\":\"4px\",\"settings\":{\"enableSelection\":true,\"enableSearch\":true,\"displayDetails\":true,\"displayPagination\":true,\"defaultPageSize\":10,\"defaultSortOrder\":\"entityName\",\"displayEntityName\":true,\"displayEntityType\":true},\"title\":\"Entities table\",\"dropShadow\":true,\"enableFullscreen\":true,\"titleStyle\":{\"fontSize\":\"16px\",\"fontWeight\":400,\"padding\":\"5px 10px 5px 10px\"},\"useDashboardTimewindow\":false,\"showLegend\":false,\"datasources\":[{\"type\":\"function\",\"name\":\"Simulated\",\"dataKeys\":[{\"name\":\"f(x)\",\"type\":\"function\",\"label\":\"Sin\",\"color\":\"#2196f3\",\"settings\":{\"columnWidth\":\"0px\",\"useCellStyleFunction\":false,\"cellStyleFunction\":\"\",\"useCellContentFunction\":false,\"cellContentFunction\":\"\"},\"_hash\":0.472295003170325,\"funcBody\":\"return Math.round(1000*Math.sin(time/5000));\"},{\"name\":\"f(x)\",\"type\":\"function\",\"label\":\"Cos\",\"color\":\"#4caf50\",\"settings\":{\"columnWidth\":\"0px\",\"useCellStyleFunction\":false,\"cellStyleFunction\":\"\",\"useCellContentFunction\":false,\"cellContentFunction\":\"\"},\"_hash\":0.8926244886945558,\"funcBody\":\"return Math.round(1000*Math.cos(time/5000));\"},{\"name\":\"f(x)\",\"type\":\"function\",\"label\":\"Random\",\"color\":\"#f44336\",\"settings\":{\"columnWidth\":\"0px\",\"useCellStyleFunction\":false,\"cellStyleFunction\":\"\",\"useCellContentFunction\":false,\"cellContentFunction\":\"\"},\"_hash\":0.6401141393938932,\"funcBody\":\"var value = prevValue + Math.random() * 100 - 50;\\nvar multiplier = Math.pow(10, 2 || 0);\\nvar value = Math.round(value * multiplier) / multiplier;\\nif (value < -1000) {\\n\\tvalue = -1000;\\n} else if (value > 1000) {\\n\\tvalue = 1000;\\n}\\nreturn value;\"}]}]}"
         "defaultConfig": "{\"timewindow\":{\"realtime\":{\"interval\":1000,\"timewindowMs\":86400000},\"aggregation\":{\"type\":\"NONE\",\"limit\":200}},\"showTitle\":true,\"backgroundColor\":\"rgb(255, 255, 255)\",\"color\":\"rgba(0, 0, 0, 0.87)\",\"padding\":\"4px\",\"settings\":{\"enableSelection\":true,\"enableSearch\":true,\"displayDetails\":true,\"displayPagination\":true,\"defaultPageSize\":10,\"defaultSortOrder\":\"entityName\",\"displayEntityName\":true,\"displayEntityType\":true},\"title\":\"Entities table\",\"dropShadow\":true,\"enableFullscreen\":true,\"titleStyle\":{\"fontSize\":\"16px\",\"fontWeight\":400,\"padding\":\"5px 10px 5px 10px\"},\"useDashboardTimewindow\":false,\"showLegend\":false,\"datasources\":[{\"type\":\"function\",\"name\":\"Simulated\",\"dataKeys\":[{\"name\":\"f(x)\",\"type\":\"function\",\"label\":\"Sin\",\"color\":\"#2196f3\",\"settings\":{\"columnWidth\":\"0px\",\"useCellStyleFunction\":false,\"cellStyleFunction\":\"\",\"useCellContentFunction\":false,\"cellContentFunction\":\"\"},\"_hash\":0.472295003170325,\"funcBody\":\"return Math.round(1000*Math.sin(time/5000));\"},{\"name\":\"f(x)\",\"type\":\"function\",\"label\":\"Cos\",\"color\":\"#4caf50\",\"settings\":{\"columnWidth\":\"0px\",\"useCellStyleFunction\":false,\"cellStyleFunction\":\"\",\"useCellContentFunction\":false,\"cellContentFunction\":\"\"},\"_hash\":0.8926244886945558,\"funcBody\":\"return Math.round(1000*Math.cos(time/5000));\"},{\"name\":\"f(x)\",\"type\":\"function\",\"label\":\"Random\",\"color\":\"#f44336\",\"settings\":{\"columnWidth\":\"0px\",\"useCellStyleFunction\":false,\"cellStyleFunction\":\"\",\"useCellContentFunction\":false,\"cellContentFunction\":\"\"},\"_hash\":0.6401141393938932,\"funcBody\":\"var value = prevValue + Math.random() * 100 - 50;\\nvar multiplier = Math.pow(10, 2 || 0);\\nvar value = Math.round(value * multiplier) / multiplier;\\nif (value < -1000) {\\n\\tvalue = -1000;\\n} else if (value > 1000) {\\n\\tvalue = 1000;\\n}\\nreturn value;\"}]}]}"
       }
       }
+    },
+    {
+      "alias": "entities_hierarchy",
+      "name": "Entities hierarchy",
+      "descriptor": {
+        "type": "latest",
+        "sizeX": 7.5,
+        "sizeY": 3.5,
+        "resources": [],
+        "templateHtml": "<tb-entities-hierarchy-widget \n    [ctx]=\"ctx\">\n</tb-entities-hierarchy-widget>",
+        "templateCss": "",
+        "controllerScript": "self.onInit = function() {\n}\n\nself.onDataUpdated = function() {\n    self.ctx.$scope.entitiesHierarchyWidget.onDataUpdated();\n}\n\nself.typeParameters = function() {\n    return {\n        dataKeysOptional: true\n    };\n}\n\nself.actionSources = function() {\n    return {\n        'nodeSelected': {\n            name: 'widget-action.node-selected',\n            multiple: false\n        }\n    };\n}\n\nself.onDestroy = function() {\n}\n",
+        "settingsSchema": "{\n    \"schema\": {\n        \"type\": \"object\",\n        \"title\": \"EntitiesHierarchySettings\",\n        \"properties\": {\n            \"nodeRelationQueryFunction\": {\n                \"title\": \"Node relations query function: f(nodeCtx)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            },\n            \"nodeHasChildrenFunction\": {\n                \"title\": \"Node has children function: f(nodeCtx)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            },\n            \"nodeOpenedFunction\": {\n                \"title\": \"Default node opened function: f(nodeCtx)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            },\n            \"nodeDisabledFunction\": {\n                \"title\": \"Node disabled function: f(nodeCtx)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            },\n            \"nodeIconFunction\": {\n                \"title\": \"Node icon function: f(nodeCtx)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            },\n            \"nodeTextFunction\": {\n                \"title\": \"Node text function: f(nodeCtx)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            },\n            \"nodesSortFunction\": {\n                \"title\": \"Nodes sort function: f(nodeCtx1, nodeCtx2)\",\n                \"type\": \"string\",\n                \"default\": \"\"\n            }\n        },\n        \"required\": []\n    },\n    \"form\": [\n        {\n            \"key\": \"nodeRelationQueryFunction\",\n            \"type\": \"javascript\"\n        },\n        {\n            \"key\": \"nodeHasChildrenFunction\",\n            \"type\": \"javascript\"\n        },\n        {\n            \"key\": \"nodeOpenedFunction\",\n            \"type\": \"javascript\"\n        },\n        {\n            \"key\": \"nodeDisabledFunction\",\n            \"type\": \"javascript\"\n        },\n        {\n            \"key\": \"nodeIconFunction\",\n            \"type\": \"javascript\"\n        },\n        {\n            \"key\": \"nodeTextFunction\",\n            \"type\": \"javascript\"\n        },\n        {\n            \"key\": \"nodesSortFunction\",\n            \"type\": \"javascript\"\n        }\n    ]\n}",
+        "dataKeySettingsSchema": "{\n    \"schema\": {\n        \"type\": \"object\",\n        \"title\": \"DataKeySettings\",\n        \"properties\": {},\n        \"required\": []\n    },\n    \"form\": []\n}",
+        "defaultConfig": "{\"timewindow\":{\"realtime\":{\"interval\":1000,\"timewindowMs\":86400000},\"aggregation\":{\"type\":\"NONE\",\"limit\":200}},\"showTitle\":true,\"backgroundColor\":\"rgb(255, 255, 255)\",\"color\":\"rgba(0, 0, 0, 0.87)\",\"padding\":\"4px\",\"settings\":{\"nodeRelationQueryFunction\":\"/**\\n\\n// Function should return relations query object for current node used to fetch entity children.\\n// Function can return 'default' string value. In this case default relations query will be used.\\n\\n// The following example code will construct simple relations query that will fetch relations of type 'Contains'\\n// from the current entity.\\n\\nvar entity = nodeCtx.entity;\\nvar query = {\\n    parameters: {\\n        rootId: entity.id.id,\\n        rootType: entity.id.entityType,\\n        direction: \\\"FROM\\\",\\n        maxLevel: 1\\n    },\\n    filters: [{\\n        relationType: \\\"Contains\\\",\\n        entityTypes: []\\n    }]\\n};\\nreturn query;\\n\\n**/\\n\",\"nodeHasChildrenFunction\":\"/**\\n\\n// Function should return boolean value indicating whether current node has children (whether it can be expanded).\\n\\n// The following example code will restrict entities hierarchy expansion up to third level.\\n\\nreturn nodeCtx.level <= 2;\\n\\n// The next example code will restrict entities expansion according to the value of example 'nodeHasChildren' attribute.\\n\\nvar data = nodeCtx.data;\\nif (data.hasOwnProperty('nodeHasChildren') && data['nodeHasChildren'] !== null) {\\n    return data['nodeHasChildren'] === 'true';\\n} else {\\n    return true;\\n}\\n  \\n**/\\n \",\"nodeTextFunction\":\"/**\\n\\n// Function should return text (can be HTML code) for the current node.\\n\\n// The following example code will generate node text consisting of entity name and temperature if temperature value is present in entity attributes/timeseries.\\n\\nvar data =  nodeCtx.data;\\nvar entity = nodeCtx.entity;\\nvar text = entity.name;\\nif (data.hasOwnProperty('temperature') && data['temperature'] !== null) {\\n    text += \\\" <b>\\\"+ data['temperature'] +\\\" °C</b>\\\";\\n}\\nreturn text;\\n\\n**/\",\"nodeIconFunction\":\"/** \\n\\n// Function should return node icon info object.\\n// Resulting object should contain either 'materialIcon' or 'iconUrl' property. \\n// Where:\\n    - 'materialIcon' - name of the material icon to be used from the Material Icons Library (https://material.io/tools/icons);\\n    - 'iconUrl' - url of the external image to be used as node icon.\\n// Function can return 'default' string value. In this case default icons according to entity type will be used.\\n\\n// The following example code shows how to use external image for devices which name starts with 'Test' and use \\n// default icons for the rest of entities.\\n\\nvar entity = nodeCtx.entity;\\nif (entity.id.entityType === 'DEVICE' && entity.name.startsWith('Test')) {\\n    return {iconUrl: 'https://avatars1.githubusercontent.com/u/14793288?v=4&s=117'};\\n} else {\\n    return 'default';\\n}\\n \\n**/\",\"nodeDisabledFunction\":\"/**\\n\\n// Function should return boolean value indicating whether current node should be disabled (not selectable).\\n\\n// The following example code will disable current node according to the value of example 'nodeDisabled' attribute.\\n\\nvar data = nodeCtx.data;\\nif (data.hasOwnProperty('nodeDisabled') && data['nodeDisabled'] !== null) {\\n    return data['nodeDisabled'] === 'true';\\n} else {\\n    return false;\\n}\\n  \\n**/\\n\",\"nodesSortFunction\":\"/**\\n\\n// This function is used to sort nodes of the same level. Function should compare two nodes and return \\n// integer value: \\n//     - less than 0 - sort nodeCtx1 to an index lower than nodeCtx2\\n//     - 0 - leave nodeCtx1 and nodeCtx2 unchanged with respect to each other\\n//     - greater than 0 - sort nodeCtx2 to an index lower than nodeCtx1\\n\\n// The following example code will sort entities first by entity type in alphabetical order then\\n// by entity name in alphabetical order.\\n\\nvar result = nodeCtx1.entity.id.entityType.localeCompare(nodeCtx2.entity.id.entityType);\\nif (result === 0) {\\n    result = nodeCtx1.entity.name.localeCompare(nodeCtx2.entity.name);\\n}\\nreturn result;\\n  \\n**/\",\"nodeOpenedFunction\":\"/**\\n\\n// Function should return boolean value indicating whether current node should be opened (expanded) when it first loaded.\\n\\n// The following example code will open by default nodes up to third level.\\n\\nreturn nodeCtx.level <= 2;\\n\\n**/\\n \"},\"title\":\"Entities hierarchy\",\"dropShadow\":true,\"enableFullscreen\":true,\"titleStyle\":{\"fontSize\":\"16px\",\"fontWeight\":400,\"padding\":\"5px 10px 5px 10px\"},\"useDashboardTimewindow\":false,\"showLegend\":false,\"datasources\":[{\"type\":\"function\",\"name\":\"Simulated\",\"dataKeys\":[{\"name\":\"f(x)\",\"type\":\"function\",\"label\":\"Sin\",\"color\":\"#2196f3\",\"settings\":{\"columnWidth\":\"0px\",\"useCellStyleFunction\":false,\"cellStyleFunction\":\"\",\"useCellContentFunction\":false,\"cellContentFunction\":\"\"},\"_hash\":0.472295003170325,\"funcBody\":\"return Math.round(1000*Math.sin(time/5000));\"},{\"name\":\"f(x)\",\"type\":\"function\",\"label\":\"Cos\",\"color\":\"#4caf50\",\"settings\":{\"columnWidth\":\"0px\",\"useCellStyleFunction\":false,\"cellStyleFunction\":\"\",\"useCellContentFunction\":false,\"cellContentFunction\":\"\"},\"_hash\":0.8926244886945558,\"funcBody\":\"return Math.round(1000*Math.cos(time/5000));\"},{\"name\":\"f(x)\",\"type\":\"function\",\"label\":\"Random\",\"color\":\"#f44336\",\"settings\":{\"columnWidth\":\"0px\",\"useCellStyleFunction\":false,\"cellStyleFunction\":\"\",\"useCellContentFunction\":false,\"cellContentFunction\":\"\"},\"_hash\":0.6401141393938932,\"funcBody\":\"var value = prevValue + Math.random() * 100 - 50;\\nvar multiplier = Math.pow(10, 2 || 0);\\nvar value = Math.round(value * multiplier) / multiplier;\\nif (value < -1000) {\\n\\tvalue = -1000;\\n} else if (value > 1000) {\\n\\tvalue = 1000;\\n}\\nreturn value;\"}]}],\"widgetStyle\":{},\"actions\":{}}"
+      }
     }
     }
   ]
   ]
 }
 }

@@ -8997,10 +8997,10 @@
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       "integrity": "sha512-4O3GWAYJaauMCILm07weko2rHA8a4kjn7+8Lg4s1d7SxwS/3IpkVD/GljbRrIJ1c1W/XGJ3GbuK7RyYZEJChhw=="
     },
     },
     "ngx-flowchart": {
     "ngx-flowchart": {
-      "version": "git://github.com/thingsboard/ngx-flowchart.git#a4157b0eef2eb3646ef920447c7b06b39d54f87f",
+      "version": "git://github.com/thingsboard/ngx-flowchart.git#7a02f4748b5e7821a883c903107af5f20415d026",
       "from": "git://github.com/thingsboard/ngx-flowchart.git#master",
       "from": "git://github.com/thingsboard/ngx-flowchart.git#master",
       "requires": {
       "requires": {
-        "tslib": "^1.10.0"
+        "tslib": "^1.13.0"
       },
       },
       "dependencies": {
       "dependencies": {
         "tslib": {
         "tslib": {

@@ -20,7 +20,7 @@ import { Datasource, DatasourceType } from '@app/shared/models/widget.models';
 import { deepClone, isEqual } from '@core/utils';
 import { deepClone, isEqual } from '@core/utils';
 import { EntityService } from '@core/http/entity.service';
 import { EntityService } from '@core/http/entity.service';
 import { UtilsService } from '@core/services/utils.service';
 import { UtilsService } from '@core/services/utils.service';
-import { EntityAliases } from '@shared/models/alias.models';
+import { AliasFilterType, EntityAliases, SingleEntityFilter } from '@shared/models/alias.models';
 import { EntityInfo } from '@shared/models/entity.models';
 import { EntityInfo } from '@shared/models/entity.models';
 import { map, mergeMap } from 'rxjs/operators';
 import { map, mergeMap } from 'rxjs/operators';
 import {
 import {
@@ -282,6 +282,15 @@ export class AliasController implements IAliasController {
             }
             }
           })
           })
         );
         );
+      } else if (newDatasource.entityId && !newDatasource.entityFilter) {
+        newDatasource.entityFilter = {
+          singleEntity: {
+            id: newDatasource.entityId,
+            entityType: newDatasource.entityType,
+          },
+          type: AliasFilterType.singleEntity
+        } as SingleEntityFilter;
+        return of(newDatasource);
       } else {
       } else {
         newDatasource.aliasName = newDatasource.entityName;
         newDatasource.aliasName = newDatasource.entityName;
         newDatasource.name = newDatasource.entityName;
         newDatasource.name = newDatasource.entityName;

@@ -23,19 +23,18 @@ import { DatasourceData, DatasourceType, WidgetConfig, widgetType } from '@share
 import { IWidgetSubscription, WidgetSubscriptionOptions } from '@core/api/widget-api.models';
 import { IWidgetSubscription, WidgetSubscriptionOptions } from '@core/api/widget-api.models';
 import { UtilsService } from '@core/services/utils.service';
 import { UtilsService } from '@core/services/utils.service';
 import cssjs from '@core/css/css';
 import cssjs from '@core/css/css';
-import { forkJoin, fromEvent, Observable, of } from 'rxjs';
-import { catchError, debounceTime, distinctUntilChanged, map, mergeMap, tap } from 'rxjs/operators';
+import { fromEvent } from 'rxjs';
+import { debounceTime, distinctUntilChanged, tap } from 'rxjs/operators';
 import { constructTableCssString } from '@home/components/widget/lib/table-widget.models';
 import { constructTableCssString } from '@home/components/widget/lib/table-widget.models';
 import { Overlay } from '@angular/cdk/overlay';
 import { Overlay } from '@angular/cdk/overlay';
 import {
 import {
   LoadNodesCallback,
   LoadNodesCallback,
   NavTreeEditCallbacks,
   NavTreeEditCallbacks,
+  NodesCallback,
   NodeSearchCallback,
   NodeSearchCallback,
   NodeSelectedCallback,
   NodeSelectedCallback,
   NodesInsertedCallback
   NodesInsertedCallback
 } from '@shared/components/nav-tree.component';
 } from '@shared/components/nav-tree.component';
-import { BaseData } from '@shared/models/base-data';
-import { EntityId } from '@shared/models/id/entity-id';
 import { EntityType } from '@shared/models/entity-type.models';
 import { EntityType } from '@shared/models/entity-type.models';
 import { deepClone, hashCode } from '@core/utils';
 import { deepClone, hashCode } from '@core/utils';
 import {
 import {
@@ -58,10 +57,9 @@ import {
   NodesSortFunction,
   NodesSortFunction,
   NodeTextFunction
   NodeTextFunction
 } from '@home/components/widget/lib/entities-hierarchy-widget.models';
 } from '@home/components/widget/lib/entities-hierarchy-widget.models';
-import { EntityService } from '@core/http/entity.service';
-import { EntityRelationsQuery, EntitySearchDirection } from '@shared/models/relation.models';
-import { EntityRelationService } from '@core/http/entity-relation.service';
-import { ActionNotificationShow } from '@core/notification/notification.actions';
+import { EntityRelationsQuery } from '@shared/models/relation.models';
+import { AliasFilterType, RelationsQueryFilter } from '@shared/models/alias.models';
+import { EntityFilter } from '@shared/models/query/query.models';
 
 
 @Component({
 @Component({
   selector: 'tb-entities-hierarchy-widget',
   selector: 'tb-entities-hierarchy-widget',
@@ -86,6 +84,7 @@ export class EntitiesHierarchyWidgetComponent extends PageComponent implements O
   private widgetConfig: WidgetConfig;
   private widgetConfig: WidgetConfig;
   private subscription: IWidgetSubscription;
   private subscription: IWidgetSubscription;
   private datasources: Array<HierarchyNodeDatasource>;
   private datasources: Array<HierarchyNodeDatasource>;
+  private data: Array<Array<DatasourceData>>;
 
 
   private nodesMap: {[nodeId: string]: HierarchyNavTreeNode} = {};
   private nodesMap: {[nodeId: string]: HierarchyNavTreeNode} = {};
   private pendingUpdateNodeTasks: {[nodeId: string]: () => void} = {};
   private pendingUpdateNodeTasks: {[nodeId: string]: () => void} = {};
@@ -108,14 +107,11 @@ export class EntitiesHierarchyWidgetComponent extends PageComponent implements O
     }
     }
   };
   };
 
 
-
   constructor(protected store: Store<AppState>,
   constructor(protected store: Store<AppState>,
               private elementRef: ElementRef,
               private elementRef: ElementRef,
               private overlay: Overlay,
               private overlay: Overlay,
               private viewContainerRef: ViewContainerRef,
               private viewContainerRef: ViewContainerRef,
-              private utils: UtilsService,
-              private entityService: EntityService,
-              private entityRelationService: EntityRelationService) {
+              private utils: UtilsService) {
     super(store);
     super(store);
   }
   }
 
 
@@ -125,6 +121,7 @@ export class EntitiesHierarchyWidgetComponent extends PageComponent implements O
     this.widgetConfig = this.ctx.widgetConfig;
     this.widgetConfig = this.ctx.widgetConfig;
     this.subscription = this.ctx.defaultSubscription;
     this.subscription = this.ctx.defaultSubscription;
     this.datasources = this.subscription.datasources as Array<HierarchyNodeDatasource>;
     this.datasources = this.subscription.datasources as Array<HierarchyNodeDatasource>;
+    this.data = this.subscription.dataPages[0].data;
     this.initializeConfig();
     this.initializeConfig();
     this.ctx.updateWidgetParams();
     this.ctx.updateWidgetParams();
   }
   }
@@ -254,33 +251,15 @@ export class EntitiesHierarchyWidgetComponent extends PageComponent implements O
 
 
   public loadNodes: LoadNodesCallback = (node, cb) => {
   public loadNodes: LoadNodesCallback = (node, cb) => {
     if (node.id === '#') {
     if (node.id === '#') {
-      const tasks: Observable<HierarchyNavTreeNode>[] = [];
-      this.datasources.forEach((datasource) => {
-        tasks.push(this.datasourceToNode(datasource));
-      });
-      forkJoin(tasks).subscribe((nodes) => {
-        cb(this.prepareNodes(nodes));
-        this.updateNodeData(this.subscription.data);
+      const childNodes: HierarchyNavTreeNode[] = [];
+      this.datasources.forEach((childDatasource, index) => {
+        childNodes.push(this.datasourceToNode(childDatasource as HierarchyNodeDatasource, this.data[index]));
       });
       });
+      cb(this.prepareNodes(childNodes));
     } else {
     } else {
       if (node.data && node.data.nodeCtx.entity && node.data.nodeCtx.entity.id && node.data.nodeCtx.entity.id.entityType !== 'function') {
       if (node.data && node.data.nodeCtx.entity && node.data.nodeCtx.entity.id && node.data.nodeCtx.entity.id.entityType !== 'function') {
-        const relationQuery = this.prepareNodeRelationQuery(node.data.nodeCtx);
-        this.entityRelationService.findByQuery(relationQuery, {ignoreErrors: true, ignoreLoading: true}).subscribe(
-          (entityRelations) => {
-            if (entityRelations.length) {
-              const tasks: Observable<HierarchyNavTreeNode>[] = [];
-              entityRelations.forEach((relation) => {
-                const targetId = relationQuery.parameters.direction === EntitySearchDirection.FROM ? relation.to : relation.from;
-                tasks.push(this.entityIdToNode(targetId.entityType as EntityType, targetId.id, node.data.datasource, node.data.nodeCtx));
-              });
-              forkJoin(tasks).subscribe((nodes) => {
-                cb(this.prepareNodes(nodes));
-              });
-            } else {
-              cb([]);
-            }
-          },
-          (error) => {
+        this.loadChildren(node, node.data.datasource, cb);
+        /* (error) => { // TODO:
             let errorText = 'Failed to get relations!';
             let errorText = 'Failed to get relations!';
             if (error && error.status === 400) {
             if (error && error.status === 400) {
               errorText = 'Invalid relations query returned by \'Node relations query function\'! Please check widget configuration!';
               errorText = 'Invalid relations query returned by \'Node relations query function\'! Please check widget configuration!';
@@ -288,6 +267,7 @@ export class EntitiesHierarchyWidgetComponent extends PageComponent implements O
             this.showError(errorText);
             this.showError(errorText);
           }
           }
         );
         );
+        */
       } else {
       } else {
         cb([]);
         cb([]);
       }
       }
@@ -313,7 +293,7 @@ export class EntitiesHierarchyWidgetComponent extends PageComponent implements O
     }
     }
   }
   }
 
 
-  public onNodesInserted: NodesInsertedCallback = (nodes, parent) => {
+  public onNodesInserted: NodesInsertedCallback = (nodes) => {
     if (nodes) {
     if (nodes) {
       nodes.forEach((nodeId) => {
       nodes.forEach((nodeId) => {
         const task = this.pendingUpdateNodeTasks[nodeId];
         const task = this.pendingUpdateNodeTasks[nodeId];
@@ -355,17 +335,6 @@ export class EntitiesHierarchyWidgetComponent extends PageComponent implements O
     }
     }
   }
   }
 
 
-  private showError(errorText: string) {
-    this.store.dispatch(new ActionNotificationShow(
-      {
-        message: errorText,
-        type: 'error',
-        target: this.toastTargetId,
-        verticalPosition: 'bottom',
-        horizontalPosition: 'left'
-      }));
-  }
-
   private prepareNodes(nodes: HierarchyNavTreeNode[]): HierarchyNavTreeNode[] {
   private prepareNodes(nodes: HierarchyNavTreeNode[]): HierarchyNavTreeNode[] {
     nodes = nodes.filter((node) => node !== null);
     nodes = nodes.filter((node) => node !== null);
     nodes.sort((node1, node2) => this.nodesSortFunction(node1.data.nodeCtx, node2.data.nodeCtx));
     nodes.sort((node1, node2) => this.nodesSortFunction(node1.data.nodeCtx, node2.data.nodeCtx));
@@ -399,85 +368,87 @@ export class EntitiesHierarchyWidgetComponent extends PageComponent implements O
     }
     }
   }
   }
 
 
-  private datasourceToNode(datasource: HierarchyNodeDatasource, parentNodeCtx?: HierarchyNodeContext): Observable<HierarchyNavTreeNode> {
-    return this.resolveEntity(datasource).pipe(
-      map(entity => {
-        if (entity !== null) {
-          const node: HierarchyNavTreeNode = {
-            id: (++this.nodeIdCounter) + ''
-          };
-          this.nodesMap[node.id] = node;
-          datasource.nodeId = node.id;
-          node.icon = false;
-          const nodeCtx: HierarchyNodeContext = {
-            parentNodeCtx,
-            entity,
-            data: {}
-          };
-          nodeCtx.level = parentNodeCtx ? parentNodeCtx.level + 1 : 1;
-          node.data = {
-            datasource,
-            nodeCtx
-          };
-          node.state = {
-            disabled: this.nodeDisabledFunction(node.data.nodeCtx),
-            opened: this.nodeOpenedFunction(node.data.nodeCtx)
-          };
-          node.text = this.prepareNodeText(node);
-          node.children = this.nodeHasChildrenFunction(node.data.nodeCtx);
-          return node;
-        } else {
-          return null;
-        }
-      })
-    );
+  private datasourceToNode(datasource: HierarchyNodeDatasource,
+                             data: DatasourceData[],
+                             parentNodeCtx?: HierarchyNodeContext): HierarchyNavTreeNode {
+    const node: HierarchyNavTreeNode = {
+      id: (++this.nodeIdCounter) + ''
+    };
+    this.nodesMap[node.id] = node;
+    datasource.nodeId = node.id;
+    node.icon = false;
+    const nodeCtx: HierarchyNodeContext = {
+      parentNodeCtx,
+      entity: {
+        id: {
+          id: datasource.entityId,
+          entityType: datasource.entityType
+        },
+        name: datasource.entityName,
+        label: datasource.entityLabel ? datasource.entityLabel : datasource.entityName
+      },
+      data: {}
+    };
+    datasource.dataKeys.forEach((dataKey, index) => {
+      const keyData = data[index].data;
+      if (keyData && keyData.length && keyData[0].length > 1) {
+        nodeCtx.data[dataKey.label] = keyData[0][1];
+      } else {
+        nodeCtx.data[dataKey.label] = '';
+      }
+    });
+    nodeCtx.level = parentNodeCtx ? parentNodeCtx.level + 1 : 1;
+    node.data = {
+      datasource,
+      nodeCtx
+    };
+    node.state = {
+      disabled: this.nodeDisabledFunction(node.data.nodeCtx),
+      opened: this.nodeOpenedFunction(node.data.nodeCtx)
+    };
+    node.text = this.prepareNodeText(node);
+    node.children = this.nodeHasChildrenFunction(node.data.nodeCtx);
+    return node;
   }
   }
 
 
-  private entityIdToNode(entityType: EntityType, entityId: string,
-                         parentDatasource: HierarchyNodeDatasource,
-                         parentNodeCtx: HierarchyNodeContext): Observable<HierarchyNavTreeNode> {
-    const datasource = {
-      dataKeys: parentDatasource.dataKeys,
+  private loadChildren(parentNode: HierarchyNavTreeNode, datasource: HierarchyNodeDatasource, childrenNodesLoadCb: NodesCallback) {
+    const nodeCtx = parentNode.data.nodeCtx;
+    nodeCtx.childrenNodesLoaded = false;
+    const entityFilter = this.prepareNodeRelationsQueryFilter(nodeCtx);
+    const childrenDatasource = {
+      dataKeys: datasource.dataKeys,
       type: DatasourceType.entity,
       type: DatasourceType.entity,
-      entityType,
-      entityId
+      entityFilter
     } as HierarchyNodeDatasource;
     } as HierarchyNodeDatasource;
-    return this.datasourceToNode(datasource, parentNodeCtx).pipe(
-      mergeMap((node) => {
-        if (node != null) {
-          const subscriptionOptions: WidgetSubscriptionOptions = {
-            type: widgetType.latest,
-            datasources: [datasource],
-            callbacks: {
-              onDataUpdated: subscription => {
-                this.updateNodeData(subscription.data);
-              }
-            }
-          };
-          return this.ctx.subscriptionApi.
-                      createSubscription(subscriptionOptions, true).pipe(
-                        map(() => node));
-        } else {
-          return of(node);
-        }
-      })
-    );
-  }
-
-  private resolveEntity(datasource: HierarchyNodeDatasource): Observable<BaseData<EntityId>> {
-    if (datasource.type === DatasourceType.function) {
-      const entity = {
-        id: {
-          entityType: 'function'
+    const subscriptionOptions: WidgetSubscriptionOptions = {
+      type: widgetType.latest,
+      datasources: [childrenDatasource],
+      callbacks: {
+        onSubscriptionMessage: (subscription, message) => {
+          this.ctx.showToast(message.severity, message.message, undefined,
+            'bottom', 'left', this.toastTargetId);
         },
         },
-        name: datasource.name
-      };
-      return of(entity as BaseData<EntityId>);
-    } else {
-      return this.entityService.getEntity(datasource.entityType, datasource.entityId, {ignoreLoading: true}).pipe(
-        catchError(err => of(null))
-      );
-    }
+        onInitialPageDataChanged: (subscription) => {
+          this.ctx.subscriptionApi.removeSubscription(subscription.id);
+          this.nodeEditCallbacks.refreshNode(parentNode.id);
+        },
+        onDataUpdated: subscription => {
+          if (nodeCtx.childrenNodesLoaded) {
+            this.updateNodeData(subscription.data);
+          } else {
+            const datasourcesPageData = subscription.datasourcePages[0];
+            const dataPageData = subscription.dataPages[0];
+            const childNodes: HierarchyNavTreeNode[] = [];
+            datasourcesPageData.data.forEach((childDatasource, index) => {
+              childNodes.push(this.datasourceToNode(childDatasource as HierarchyNodeDatasource, dataPageData.data[index]));
+            });
+            nodeCtx.childrenNodesLoaded = true;
+            childrenNodesLoadCb(this.prepareNodes(childNodes));
+          }
+        }
+      }
+    };
+    this.ctx.subscriptionApi.createSubscription(subscriptionOptions, true);
   }
   }
 
 
   private prepareNodeRelationQuery(nodeCtx: HierarchyNodeContext): EntityRelationsQuery {
   private prepareNodeRelationQuery(nodeCtx: HierarchyNodeContext): EntityRelationsQuery {
@@ -487,4 +458,19 @@ export class EntitiesHierarchyWidgetComponent extends PageComponent implements O
     }
     }
     return relationQuery as EntityRelationsQuery;
     return relationQuery as EntityRelationsQuery;
   }
   }
+
+  private prepareNodeRelationsQueryFilter(nodeCtx: HierarchyNodeContext): EntityFilter {
+    const relationQuery = this.prepareNodeRelationQuery(nodeCtx);
+    return {
+      rootEntity: {
+        id: relationQuery.parameters.rootId,
+        entityType: relationQuery.parameters.rootType
+      },
+      direction: relationQuery.parameters.direction,
+      filters: relationQuery.filters,
+      maxLevel: relationQuery.parameters.maxLevel,
+      fetchLastLevelOnly: relationQuery.parameters.fetchLastLevelOnly,
+      type: AliasFilterType.relationsQuery
+    } as RelationsQueryFilter;
+  }
 }
 }

@@ -16,7 +16,7 @@
 
 
 import { BaseData } from '@shared/models/base-data';
 import { BaseData } from '@shared/models/base-data';
 import { EntityId } from '@shared/models/id/entity-id';
 import { EntityId } from '@shared/models/id/entity-id';
-import { NavTreeNode } from '@shared/components/nav-tree.component';
+import { NavTreeNode, NodesCallback } from '@shared/components/nav-tree.component';
 import { Datasource } from '@shared/models/widget.models';
 import { Datasource } from '@shared/models/widget.models';
 import { isDefined, isUndefined } from '@core/utils';
 import { isDefined, isUndefined } from '@core/utils';
 import { EntityRelationsQuery, EntitySearchDirection, RelationTypeGroup } from '@shared/models/relation.models';
 import { EntityRelationsQuery, EntitySearchDirection, RelationTypeGroup } from '@shared/models/relation.models';
@@ -35,6 +35,7 @@ export interface EntitiesHierarchyWidgetSettings {
 export interface HierarchyNodeContext {
 export interface HierarchyNodeContext {
   parentNodeCtx?: HierarchyNodeContext;
   parentNodeCtx?: HierarchyNodeContext;
   entity: BaseData<EntityId>;
   entity: BaseData<EntityId>;
+  childrenNodesLoaded?: boolean;
   level?: number;
   level?: number;
   data: {[key: string]: any};
   data: {[key: string]: any};
 }
 }