Examples of org.neo4j.graphdb.NotFoundException

org.neo4j.graphdb.NotFoundException
This exception will be thrown if a request is made to a node, relationship or property that does not exist. As an example, using {@link GraphDatabaseService#getNodeById} passing in an id that does not existwill cause this exception to be thrown. {@link PropertyContainer#getProperty(String)} will also throw this exceptionif the given key does not exist.
Another scenario when this exception will be thrown is if one or more transactions keep a reference to a node or relationship that gets deleted in some other transaction. If the deleting transaction commits all other transactions having a reference to the deleted node or relationship will throw this exception when invoking any of the methods on the node or relationship. @see GraphDatabaseService

    String getName( int id )
    {
        String name = idToName.get( id );
        if ( name == null )
        {
            throw new NotFoundException( "No such relationship type[" + id + 
                "]" );
        }
        return name;
    }

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    private NodeRecord getNodeRecord( long id )
    {
        if ( id < 0 || id >= getNodeStore().getHighId() )
        {
            throw new NotFoundException( "id=" + id );
        }
        return getNodeStore().getRecord( id );
    }

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    private RelationshipRecord getRelationshipRecord( long id )
    {
        if ( id < 0 || id >= getRelationshipStore().getHighId() )
        {
            throw new NotFoundException( "id=" + id );
        }
        return getRelationshipStore().getRecord( id );
    }

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        long startNodeId = startNode.getId();
        NodeImpl firstNode = getLightNode( startNodeId );
        if ( firstNode == null )
        {
            setRollbackOnly();
            throw new NotFoundException( "First node[" + startNode.getId()
                + "] deleted" );
        }
        long endNodeId = endNode.getId();
        NodeImpl secondNode = getLightNode( endNodeId );
        if ( secondNode == null )
        {
            setRollbackOnly();
            throw new NotFoundException( "Second node[" + endNode.getId()
                + "] deleted" );
        }
        long id = idGenerator.nextId( Relationship.class );
        RelationshipImpl rel = new RelationshipImpl( id, startNodeId, endNodeId, type, true );
        boolean firstNodeTaken = false;

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            {
                return new NodeProxy( nodeId, this );
            }
            if ( !persistenceManager.loadLightNode( nodeId ) )
            {
                throw new NotFoundException( "Node[" + nodeId + "]" );
            }
            node = new NodeImpl( nodeId );
            nodeCache.put( nodeId, node );
            return new NodeProxy( nodeId, this );
        }

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            {
                return node;
            }
            if ( !persistenceManager.loadLightNode( nodeId ) )
            {
                throw new NotFoundException( "Node[" + nodeId + "] not found." );
            }
            node = new NodeImpl( nodeId );
            nodeCache.put( nodeId, node );
            return node;
        }

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    public Node getReferenceNode() throws NotFoundException
    {
        if ( referenceNodeId == -1 )
        {
            throw new NotFoundException( "No reference node set" );
        }
        return getNodeById( referenceNodeId );
    }

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            }
            RelationshipData data = persistenceManager.loadLightRelationship(
                relId );
            if ( data == null )
            {
                throw new NotFoundException( "Relationship[" + relId + "]" );
            }
            int typeId = data.relationshipType();
            RelationshipType type = getRelationshipTypeById( typeId );
            if ( type == null )
            {
                throw new NotFoundException( "Relationship[" + data.getId()
                    + "] exist but relationship type[" + typeId
                    + "] not found." );
            }
            final long startNodeId = data.firstNode();
            final long endNodeId = data.secondNode();

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            }
            RelationshipData data = persistenceManager.loadLightRelationship(
                relId );
            if ( data == null )
            {
                throw new NotFoundException( "Relationship[" + relId
                    + "] not found." );
            }
            int typeId = data.relationshipType();
            RelationshipType type = getRelationshipTypeById( typeId );
            if ( type == null )
            {
                throw new NotFoundException( "Relationship[" + data.getId()
                    + "] exist but relationship type[" + typeId
                    + "] not found." );
            }
            relationship = new RelationshipImpl( relId, data.firstNode(), data.secondNode(), type,
                    false );

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            return null;
        }
        Relationship rel = rels.next();
        if ( rels.hasNext() )
        {
            throw new NotFoundException( "More than one relationship[" +
                type + ", " + dir + "] found for " + this );
        }
        return rel;
    }

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