java.lang.Object
org.jgrapht.nio.BaseEventDrivenImporter<java.lang.String,Triple<java.lang.String,java.lang.String,java.lang.Double>>
org.jgrapht.nio.json.JSONEventDrivenImporter
- All Implemented Interfaces:
EventDrivenImporter<java.lang.String,Triple<java.lang.String,java.lang.String,java.lang.Double>>
public class JSONEventDrivenImporter extends BaseEventDrivenImporter<java.lang.String,Triple<java.lang.String,java.lang.String,java.lang.Double>> implements EventDrivenImporter<java.lang.String,Triple<java.lang.String,java.lang.String,java.lang.Double>>
Imports a graph from a JSON file.
Below is a small example of a graph in JSON format.
{ "nodes": [ { "id": "1" }, { "id": "2", "label": "Node 2 label" }, { "id": "3" } ], "edges": [ { "source": "1", "target": "2", "weight": 2.0, "label": "Edge between 1 and 2" }, { "source": "2", "target": "3", "weight": 3.0, "label": "Edge between 2 and 3" } ] }
In case the graph is weighted then the importer also reads edge weights. Otherwise the default edge weight is returned. The importer also supports reading additional string attributes such as label or custom user attributes.
The parser completely ignores elements from the input that are not related to vertices or edges of the graph. Moreover, complicated nested structures which are inside vertices or edges are simply returned as a whole. For example, in the following graph
{ "nodes": [ { "id": "1" }, { "id": "2" } ], "edges": [ { "source": "1", "target": "2", "points": { "x": 1.0, "y": 2.0 } } ] }the points attribute of the edge is returned as a string containing {"x":1.0,"y":2.0}. The same is done for arrays or any other arbitrary nested structure.
- Author:
- Dimitrios Michail
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Constructor Summary
Constructors Constructor Description JSONEventDrivenImporter()
Constructs a new importer.JSONEventDrivenImporter(boolean notifyVertexAttributesOutOfOrder, boolean notifyEdgeAttributesOutOfOrder)
Constructs a new importer. -
Method Summary
Modifier and Type Method Description void
importInput(java.io.Reader input)
Import a graphMethods inherited from class org.jgrapht.nio.BaseEventDrivenImporter
addEdgeAttributeConsumer, addEdgeConsumer, addEdgeCountConsumer, addEdgeWithAttributesConsumer, addGraphAttributeConsumer, addImportEventConsumer, addVertexAttributeConsumer, addVertexConsumer, addVertexCountConsumer, addVertexWithAttributesConsumer, notifyEdge, notifyEdgeAttribute, notifyEdgeCount, notifyEdgeWithAttributes, notifyGraphAttribute, notifyImportEvent, notifyVertex, notifyVertexAttribute, notifyVertexCount, notifyVertexWithAttributes, removeEdgeAttributeConsumer, removeEdgeConsumer, removeEdgeCountConsumer, removeEdgeWithAttributesConsumer, removeGraphAttributeConsumer, removeImportEventConsumer, removeVertexAttributeConsumer, removeVertexConsumer, removeVertexCountConsumer, removeVertexWithAttributesConsumer
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface org.jgrapht.nio.EventDrivenImporter
addEdgeAttributeConsumer, addEdgeConsumer, addEdgeCountConsumer, addEdgeWithAttributesConsumer, addGraphAttributeConsumer, addImportEventConsumer, addVertexAttributeConsumer, addVertexConsumer, addVertexCountConsumer, addVertexWithAttributesConsumer, importInput, importInput, removeEdgeAttributeConsumer, removeEdgeConsumer, removeEdgeCountConsumer, removeEdgeWithAttributesConsumer, removeGraphAttributeConsumer, removeImportEventConsumer, removeVertexAttributeConsumer, removeVertexConsumer, removeVertexCountConsumer, removeVertexWithAttributesConsumer
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Constructor Details
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JSONEventDrivenImporter
public JSONEventDrivenImporter()Constructs a new importer. -
JSONEventDrivenImporter
public JSONEventDrivenImporter(boolean notifyVertexAttributesOutOfOrder, boolean notifyEdgeAttributesOutOfOrder)Constructs a new importer.- Parameters:
notifyVertexAttributesOutOfOrder
- whether to notify for vertex attributes out-of-order even if they appear together in the inputnotifyEdgeAttributesOutOfOrder
- whether to notify for edge attributes out-of-order even if they appear together in the input
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Method Details
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importInput
public void importInput(java.io.Reader input)Description copied from interface:EventDrivenImporter
Import a graph- Specified by:
importInput
in interfaceEventDrivenImporter<java.lang.String,Triple<java.lang.String,java.lang.String,java.lang.Double>>
- Parameters:
input
- the input reader
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