org.neo4j.graphdb.Node.getLabels()方法的使用及代码示例

x33g5p2x  于2022-01-24 转载在 其他  
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本文整理了Java中org.neo4j.graphdb.Node.getLabels()方法的一些代码示例，展示了Node.getLabels()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Node.getLabels()方法的具体详情如下：
包路径：org.neo4j.graphdb.Node
类名称：Node
方法名：getLabels

Node.getLabels介绍

[英]Lists all labels attached to this node. If this node has no labels an empty Iterable will be returned.
[中]列出附加到此节点的所有标签。如果此节点没有标签，将返回一个空的Iterable。

代码示例

代码示例来源：origin: neo4j/neo4j

  1. void addNode( long id, Node data )
  2. {
  3.   nodes.put( id, data );
  4.   labels.addAll( Iterables.asCollection( data.getLabels() ) );
  5. }

代码示例来源：origin: neo4j/neo4j

  1. private String labelString( Node node )
  2. {
  3.   Iterator<Label> labels = node.getLabels().iterator();
  4.   if ( !labels.hasNext() )
  5.   {
  6.     return "";
  7.   }
  8.   StringBuilder result = new StringBuilder();
  9.   while ( labels.hasNext() )
  10.   {
  11.     Label next = labels.next();
  12.     result.append( ':' ).append( quote( next.name() ) );
  13.   }
  14.   return result.toString();
  15. }

代码示例来源：origin: neo4j/neo4j

  1. public ListRepresentation getNodeLabels( long nodeId ) throws NodeNotFoundException
  2. {
  3.   Iterable<String> labels = new IterableWrapper<String,Label>( node( nodeId ).getLabels() )
  4.   {
  5.     @Override
  6.     protected String underlyingObjectToObject( Label object )
  7.     {
  8.       return object.name();
  9.     }
  10.   };
  11.   return ListRepresentation.string( labels );
  12. }

代码示例来源：origin: neo4j/neo4j

  1. @Override
  2.   protected boolean matchesSafely( Node item, Description mismatchDescription )
  3.   {
  4.     foundLabels = asLabelNameSet( item.getLabels() );
  5.     if ( foundLabels.size() == expectedLabels.size() && foundLabels.containsAll( expectedLabels ) )
  6.     {
  7.       return true;
  8.     }
  9.     mismatchDescription.appendText( "was " + foundLabels.toString() );
  10.     return false;
  11.   }
  12. };

代码示例来源：origin: neo4j/neo4j

  1. private static String labelsOf( Node node )
  2. {
  3.   StringBuilder builder = new StringBuilder();
  4.   for ( Label label : node.getLabels() )
  5.   {
  6.     builder.append( label.name() + " " );
  7.   }
  8.   return builder.toString();
  9. }

代码示例来源：origin: neo4j/neo4j

  1. @Override
  2.   protected boolean matchesSafely( Node item, Description mismatchDescription )
  3.   {
  4.     boolean result = item.hasLabel( myLabel );
  5.     if ( !result )
  6.     {
  7.       Set<String> labels = asLabelNameSet( item.getLabels() );
  8.       mismatchDescription.appendText( labels.toString() );
  9.     }
  10.     return result;
  11.   }
  12. };

代码示例来源：origin: neo4j/neo4j

  1. private static Node mockNode( long id, Label[] labels, Properties properties )
  2. {
  3.   Node node = mockPropertyContainer( Node.class, properties );
  4.   when( node.getId() ).thenReturn( id );
  5.   when( node.getLabels() ).thenReturn( Iterables.asResourceIterable( asList( labels ) ) );
  6.   return node;
  7. }

代码示例来源：origin: neo4j/neo4j

  1. private void assertNoLabels( long nodeId )
  2. {
  3.   try ( org.neo4j.graphdb.Transaction ignore = graphDb.beginTx() )
  4.   {
  5.     assertThat( graphDb.getNodeById( nodeId ).getLabels(), equalTo( Iterables.empty() ) );
  6.   }
  7. }

代码示例来源：origin: neo4j/neo4j

  1. private void assertLabels( long nodeId, String label )
  2. {
  3.   try ( org.neo4j.graphdb.Transaction ignore = graphDb.beginTx() )
  4.   {
  5.     assertThat( graphDb.getNodeById( nodeId ).getLabels(), containsInAnyOrder( label( label ) ) );
  6.   }
  7. }

代码示例来源：origin: neo4j/neo4j

  1. public Iterable<String> getNodeLabels( long node )
  2. {
  3.   return new IterableWrapper<String, Label>( database.getGraph().getNodeById( node ).getLabels() )
  4.   {
  5.     @Override
  6.     protected String underlyingObjectToObject( Label object )
  7.     {
  8.       return object.name();
  9.     }
  10.   };
  11. }

代码示例来源：origin: neo4j/neo4j

  1. private void modifyLabelsOnExistingNode( List<Pair<Long,Label[]>> existingNodes )
  2. {
  3.   int targetIndex = random.nextInt( existingNodes.size() );
  4.   Pair<Long,Label[]> existingPair = existingNodes.get( targetIndex );
  5.   long nodeId = existingPair.first();
  6.   Node node = db.getNodeById( nodeId );
  7.   node.getLabels().forEach( node::removeLabel );
  8.   Label[] newLabels = randomLabels();
  9.   for ( Label label : newLabels )
  10.   {
  11.     node.addLabel( label );
  12.   }
  13.   existingNodes.remove( targetIndex );
  14.   existingNodes.add( Pair.of( nodeId, newLabels ) );
  15. }

代码示例来源：origin: neo4j/neo4j

  1. private void modifyLabelsOnExistingNode( List<Pair<Long,Label[]>> existingNodes )
  2. {
  3.   int targetIndex = random.nextInt( existingNodes.size() );
  4.   Pair<Long,Label[]> existingPair = existingNodes.get( targetIndex );
  5.   long nodeId = existingPair.first();
  6.   Node node = db.getNodeById( nodeId );
  7.   node.getLabels().forEach( node::removeLabel );
  8.   Label[] newLabels = randomLabels();
  9.   for ( Label label : newLabels )
  10.   {
  11.     node.addLabel( label );
  12.   }
  13.   existingNodes.remove( targetIndex );
  14.   existingNodes.add( Pair.of( nodeId, newLabels ) );
  15. }

代码示例来源：origin: neo4j/neo4j

  1. private void verifyLabels( long nodeId, int startLabelIndex, int count )
  2. {
  3.   try ( Transaction tx = dbRule.beginTx() )
  4.   {
  5.     Node node = dbRule.getNodeById( nodeId );
  6.     Set<String> labelNames = Iterables.asList( node.getLabels() )
  7.         .stream()
  8.         .map( Label::name )
  9.         .sorted()
  10.         .collect( toSet() );
  11.     assertEquals( count, labelNames.size() );
  12.     int endLabelIndex = startLabelIndex + count;
  13.     for ( int i = startLabelIndex; i < endLabelIndex; i++ )
  14.     {
  15.       assertTrue( labelNames.contains( labelName( i ) ) );
  16.     }
  17.     tx.success();
  18.   }
  19. }

代码示例来源：origin: neo4j/neo4j

  1. private void assertNodeEquals( InputEntity input, Node node )
  2. {
  3.   // properties
  4.   assertPropertiesEquals( input, node );
  5.   // labels
  6.   Set<String> expectedLabels = asSet( input.labels() );
  7.   for ( Label label : node.getLabels() )
  8.   {
  9.     assertTrue( expectedLabels.remove( label.name() ) );
  10.   }
  11.   assertTrue( expectedLabels.isEmpty() );
  12. }

代码示例来源：origin: neo4j/neo4j

  1. @Test
  2. public void shouldGiveNiceErrorWhenShutdownKernelApi()
  3. {
  4.   GraphDatabaseService graphDb = graph;
  5.   Node node = graphDb.createNode();
  6.   commit();
  7.   graphDb.shutdown();
  8.   try
  9.   {
  10.     asList( node.getLabels().iterator() );
  11.     fail( "Did not get a nice exception" );
  12.   }
  13.   catch ( DatabaseShutdownException e )
  14.   { // good
  15.   }
  16. }

代码示例来源：origin: neo4j/neo4j

  1. private static void doStuff( GraphDatabaseService db, Label label, String propertyKey )
  2. {
  3.   try ( Transaction tx = db.beginTx() )
  4.   {
  5.     for ( Node node : loop( db.findNodes( label, propertyKey, 3323 ) ) )
  6.     {
  7.       count( node.getLabels() );
  8.     }
  9.   }
  10. }

代码示例来源：origin: neo4j/neo4j

  1. private long countNodes( String... labels )
  2. {
  3.   Set<Label> givenLabels = new HashSet<>( labels.length );
  4.   for ( String label : labels )
  5.   {
  6.     givenLabels.add( Label.label( label ) );
  7.   }
  8.   try ( Transaction transaction = graphdb().beginTx() )
  9.   {
  10.     long count = 0;
  11.     for ( Node node : graphdb().getAllNodes() )
  12.     {
  13.       Set<Label> nodeLabels = Iterables.asSet( node.getLabels() );
  14.       if ( nodeLabels.containsAll( givenLabels ) )
  15.       {
  16.         count++;
  17.       }
  18.     }
  19.     transaction.failure();
  20.     return count;
  21.   }
  22. }

代码示例来源：origin: neo4j/neo4j

  1. @Mapping( "metadata" )
  2. public MapRepresentation metadata()
  3. {
  4.   if ( isDeleted() )
  5.   {
  6.     return new MapRepresentation( map( "id", node.getId(), "deleted", Boolean.TRUE ) );
  7.   }
  8.   else
  9.   {
  10.     Collection<String> labels = Iterables.asCollection( new IterableWrapper<String,Label>( node.getLabels() )
  11.     {
  12.       @Override
  13.       protected String underlyingObjectToObject( Label label )
  14.       {
  15.         return label.name();
  16.       }
  17.     } );
  18.     return new MapRepresentation( map( "id", node.getId(), "labels", labels ) );
  19.   }
  20. }

代码示例来源：origin: neo4j/neo4j

  1. public long getLabelCount( long nodeId )
  2.   {
  3.     try ( Transaction transaction = database.getGraph().beginTransaction( implicit, AnonymousContext.read() ) )
  4.     {
  5.       return count( database.getGraph().getNodeById( nodeId ).getLabels());
  6.     }
  7.   }
  8. }

代码示例来源：origin: neo4j/neo4j

  1. @Test
  2. public void removingLabelDoesNotBreakPreviouslyCreatedLabelsIterator()
  3. {
  4.   // GIVEN
  5.   GraphDatabaseService db = dbRule.getGraphDatabaseAPI();
  6.   Label label1 = label( "A" );
  7.   Label label2 = label( "B" );
  8.   try ( Transaction tx = db.beginTx() )
  9.   {
  10.     Node node = db.createNode( label1, label2 );
  11.     for ( Label next : node.getLabels() )
  12.     {
  13.       node.removeLabel( next );
  14.     }
  15.     tx.success();
  16.   }
  17. }

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