Examples of org.graphstream.graph.IdAlreadyInUseException

org.graphstream.graph.IdAlreadyInUseException
Singleton exception.
This exception can be raised when a class instance should be unique in one context, but was instantiated several times. This can be used in a "singleton" pattern, but also in set classes (containers) when the same element has been inserted multiple times but should not.
@since 19990811

  public <T extends Node> T addNode(String id) {
    AbstractNode node = getNode(id);


    if (node != null) {
      if (strictChecking)
        throw new IdAlreadyInUseException("id \"" + id
            + "\" already in use. Cannot create a node.");
      return (T) node;
    }


    node = nodeFactory.newInstance(id, this);

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  protected <T extends Edge> T addEdge(String edgeId, AbstractNode src,
      String srcId, AbstractNode dst, String dstId, boolean directed) {
    AbstractEdge edge = getEdge(edgeId);
    if (edge != null) {
      if (strictChecking)
        throw new IdAlreadyInUseException("id \"" + edgeId
            + "\" already in use. Cannot create an edge.");
      if ((edge.getSourceNode() == src && edge.getTargetNode() == dst)
          || (!directed && edge.getTargetNode() == src && edge
              .getSourceNode() == dst))
        return (T) edge;

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Related Classes of org.graphstream.graph.IdAlreadyInUseException

org.graphstream.graph.implementations.AbstractGraph

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