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

x33g5p2x  于2022-01-24 转载在 其他  
字(8.2k)|赞(0)|评价(0)|浏览(259)

本文整理了Java中org.neo4j.graphdb.Node.getPropertyKeys()方法的一些代码示例，展示了Node.getPropertyKeys()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.getPropertyKeys()方法的具体详情如下：
包路径：org.neo4j.graphdb.Node
类名称：Node
方法名：getPropertyKeys

Node.getPropertyKeys介绍

暂无

代码示例

代码示例来源：origin: neo4j/neo4j

  1. @Test
  2. public void shouldBeAbleToRemoveNodeProperties() throws Exception
  3. {
  4.   Map<String, Object> properties = new HashMap<>();
  5.   properties.put( "foo", "bar" );
  6.   properties.put( "number", 15 );
  7.   long nodeId = createNode( properties );
  8.   actions.removeAllNodeProperties( nodeId );
  9.   try ( Transaction tx = database.getGraph().beginTx() )
  10.   {
  11.     Node node = database.getGraph().getNodeById( nodeId );
  12.     assertFalse( node.getPropertyKeys().iterator().hasNext() );
  13.     tx.success();
  14.   }
  15. }

代码示例来源：origin: neo4j/neo4j

  1. @Test
  2. public void testNodeGetProperties()
  3. {
  4.   Node node1 = getGraphDb().getNodeById( node1Id );
  5.   assertTrue( !node1.hasProperty( null ) );
  6.   Iterator<String> keys = node1.getPropertyKeys().iterator();
  7.   keys.next();
  8.   keys.next();
  9.   assertTrue( node1.hasProperty( key1 ) );
  10.   assertTrue( node1.hasProperty( key2 ) );
  11. }

代码示例来源：origin: neo4j/neo4j

  1. @Test
  2. public void removingPropertyDoesNotBreakPreviouslyCreatedNodePropertyKeysIterator()
  3. {
  4.   // GIVEN
  5.   GraphDatabaseService db = dbRule.getGraphDatabaseAPI();
  6.   try ( Transaction tx = db.beginTx() )
  7.   {
  8.     Node node = db.createNode();
  9.     node.setProperty( "name", "Horst" );
  10.     node.setProperty( "age", "72" );
  11.     Iterator<String> iterator = node.getPropertyKeys().iterator();
  12.     while ( iterator.hasNext() )
  13.     {
  14.       node.removeProperty( iterator.next() );
  15.     }
  16.     tx.success();
  17.   }
  18. }

代码示例来源：origin: neo4j/neo4j

  1. for ( String key : node.getPropertyKeys() )

代码示例来源：origin: neo4j/neo4j

  1. for ( String key : node.getPropertyKeys() )

代码示例来源：origin: neo4j/neo4j

  1. for ( String key : node.getPropertyKeys() )

代码示例来源：origin: neo4j/neo4j

  1. for ( Node node : db.getAllNodes() )
  2.   for ( String key : node.getPropertyKeys() )

代码示例来源：origin: neo4j/neo4j

  1. for ( String key : node.getPropertyKeys() )

代码示例来源：origin: neo4j/neo4j

  1. for ( String key : node.getPropertyKeys() )

代码示例来源：origin: neo4j/neo4j

  1. private void changeRandomNode( GraphDatabaseService db, int nodeCount, RandomValues random )
  2. {
  3.   try ( Transaction tx = db.beginTx() )
  4.   {
  5.     long nodeId = random.nextInt( nodeCount );
  6.     Node node = db.getNodeById( nodeId );
  7.     Object[] keys = Iterables.asCollection( node.getPropertyKeys() ).toArray();
  8.     String key = (String) random.among( keys );
  9.     if ( random.nextFloat() < 0.1 )
  10.     {   // REMOVE
  11.       node.removeProperty( key );
  12.     }
  13.     else
  14.     {   // CHANGE
  15.       node.setProperty( key, random.nextValue().asObject() );
  16.     }
  17.     tx.success();
  18.   }
  19.   catch ( NotFoundException e )
  20.   {   // It's OK, it happens if some other thread deleted that property in between us reading it and
  21.     // removing or setting it
  22.   }
  23. }

代码示例来源：origin: neo4j-contrib/neo4j-apoc-procedures

  1. public static String filterCaption(Node n, Set<String> captions, BiPredicate<String, String> predicate) {
  3.     for (String caption : captions) {
  4.       for (String key : n.getPropertyKeys()) {
  5.         if (predicate.test(key, caption))
  6.           return n.getProperty(key).toString();
  7.       }
  9.     }
  10.     return null;
  11.   }
  12. }

代码示例来源：origin: neo4j/neo4j

  1. node1.setProperty( key2, int2 );
  2. node1.setProperty( key3, string );
  3. Iterator<String> keys = node1.getPropertyKeys().iterator();
  4. keys.next();
  5. keys.next();

代码示例来源：origin: neo4j-contrib/neo4j-apoc-procedures

  1. @Override
  2. public String statementForNode(Node node, Map<String, String> uniqueConstraints, Set<String> indexedProperties, Set<String> indexNames) {
  3.   StringBuilder result = new StringBuilder(100);
  4.   result.append("CREATE (");
  5.   String labels = CypherFormatterUtils.formatAllLabels(node, uniqueConstraints, indexNames);
  6.   if (!labels.isEmpty()) {
  7.     result.append(labels);
  8.   }
  9.   if (node.getPropertyKeys().iterator().hasNext()) {
  10.     result.append(" {");
  11.     result.append(CypherFormatterUtils.formatNodeProperties("", node, uniqueConstraints, indexNames, true));
  12.     result.append("}");
  13.   }
  14.   result.append(");");
  15.   return result.toString();
  16. }

代码示例来源：origin: neo4j-contrib/neo4j-apoc-procedures

  1. protected String mergeStatementForNode(CypherFormat cypherFormat, Node node, Map<String, String> uniqueConstraints, Set<String> indexedProperties, Set<String> indexNames) {
  2.   StringBuilder result = new StringBuilder(1000);
  3.   result.append("MERGE ");
  4.   result.append(CypherFormatterUtils.formatNodeLookup("n", node, uniqueConstraints, indexNames));
  5.   if (node.getPropertyKeys().iterator().hasNext()) {
  6.     String notUniqueProperties = CypherFormatterUtils.formatNotUniqueProperties("n", node, uniqueConstraints, indexedProperties, false);
  7.     String notUniqueLabels = CypherFormatterUtils.formatNotUniqueLabels("n", node, uniqueConstraints);
  8.     if (!"".equals(notUniqueProperties) || !"".equals(notUniqueLabels)) {
  9.       result.append(cypherFormat.equals(CypherFormat.ADD_STRUCTURE) ? " ON CREATE SET " : " SET ");
  10.       result.append(notUniqueProperties);
  11.       result.append(!"".equals(notUniqueProperties) && !"".equals(notUniqueLabels) ? ", " : "");
  12.       result.append(notUniqueLabels);
  13.     }
  14.   }
  15.   result.append(";");
  16.   return result.toString();
  17. }

代码示例来源：origin: neo4j-contrib/neo4j-apoc-procedures

  1. private void add(Node node) {
  2.   count++;
  3.   int degree = node.getDegree();
  4.   sumDegree += degree;
  5.   if (degree > maxDegree) maxDegree = degree;
  6.   if (degree < minDegree) minDegree = degree;
  7.   for (Label label : node.getLabels()) labels.add(label.name());
  8.   for (String key : node.getPropertyKeys()) properties.add(key);
  9. }
  10. Map<String,Object> toMap() {

代码示例来源：origin: neo4j-contrib/neo4j-apoc-procedures

  1. public static String getCaption(Node n, Set<String> captions) {
  2.   for (String caption : captions) { //first do one loop with the exact names
  3.     if (n.hasProperty(caption))
  4.       return n.getProperty(caption).toString();
  5.   }
  6.   String result = filterCaption(n, captions, (key, caption) -> key.equalsIgnoreCase(caption)); //2nd loop with lowercase
  7.   if (result == null) {
  8.     result = filterCaption(n, captions, (key, caption) -> key.toLowerCase().contains(caption) || key.toLowerCase().endsWith(caption)); //3rd loop with contains or endsWith
  9.     if (result == null) {
  10.       Iterator<String> iterator = n.getPropertyKeys().iterator();
  11.       if (iterator.hasNext()) {
  12.         result = n.getProperty(iterator.next()).toString(); // get the first property
  13.       }
  14.     }
  15.   }
  16.   return result == null ? String.valueOf(n.getId()) : result; // if the node has no property return the ID
  17. }

代码示例来源：origin: neo4j-contrib/neo4j-apoc-procedures

  1. private String caption(Node n) {
  2.     for (String caption : CAPTIONS) {
  3.       if (n.hasProperty(caption)) return n.getProperty(caption).toString();
  4.     }
  5.     String first=null;
  6.     for (String caption : CAPTIONS) {
  7.       for (String key : n.getPropertyKeys()) {
  8.         if (first==null) first = key;
  9.         if (key.toLowerCase().contains(caption)) return n.getProperty(key).toString();
  10.       }
  11.     }
  12.     return first == null ? idStr(n) : n.getProperty(first).toString();
  13.   }
  14. }

代码示例来源：origin: neo4j/neo4j

  1. @Test
  2. public void lazyLoadWithinWriteTransaction() throws Exception
  3. {
  4.   // Given
  5.   FileSystemAbstraction fileSystem = fs.get();
  6.   BatchInserter inserter = BatchInserters.inserter( testDirectory.databaseDir(), fileSystem );
  7.   int count = 3000;
  8.   long nodeId = inserter.createNode( mapWithManyProperties( count /* larger than initial property index load threshold */ ) );
  9.   inserter.shutdown();
  10.   GraphDatabaseService db = new TestGraphDatabaseFactory().setFileSystem( fileSystem ).newImpermanentDatabase( testDirectory.databaseDir() );
  11.   // When
  12.   try ( Transaction tx = db.beginTx() )
  13.   {
  14.     db.createNode();
  15.     Node node = db.getNodeById( nodeId );
  16.     // Then
  17.     assertEquals( count, Iterables.count( node.getPropertyKeys() ) );
  18.     tx.success();
  19.   }
  20.   finally
  21.   {
  22.     db.shutdown();
  23.   }
  24. }

代码示例来源：origin: neo4j-contrib/neo4j-apoc-procedures

  1. private void iterateLabelChanges(Stream<LabelEntry> stream, IndexFunction<Index<Node>, Node, String, Object, Void> function) {
  2.   stream.forEach(labelEntry -> {
  3.     final String labelName = labelEntry.label().name();
  4.     final Map<String, Collection<Index<Node>>> propertyIndicesMap = indexesByLabelAndProperty.get(labelName);
  5.     if (propertyIndicesMap != null) {
  6.       final Node entity = labelEntry.node();
  7.       for (String key : entity.getPropertyKeys()) {
  8.         Collection<Index<Node>> indices = propertyIndicesMap.get(key);
  9.         if (indices != null) {
  10.           for (Index<Node> index : indices) {
  11.             Object value = entity.getProperty(key);
  12.             String indexKey = labelName + "." + key;
  13.             function.apply(index, entity, indexKey, value, null);
  14.           }
  15.         }
  16.       }
  17.     }
  18.   });
  19. }

代码示例来源：origin: neo4j-contrib/neo4j-apoc-procedures

  1. private void appendNode(PrintWriter out, Node node, Reporter reporter) {
  2.   artificialUniques += countArtificialUniques(node);
  3.   String cypher = this.cypherFormat.statementForNode(node, uniqueConstraints, indexedProperties, indexNames);
  4.   if (Util.isNotNullOrEmpty(cypher)) {
  5.     out.println(cypher);
  6.     reporter.update(1, 0, Iterables.count(node.getPropertyKeys()));
  7.   }
  8. }

内容来源于网络，如有侵权，请联系作者删除！

Node

相关文章

    查看更多

    热门标签

    更多
    JavaquerypythonNode开发语言requestUtil数据库Table后端算法LoggerMessageElementParser

    最新文章

    更多
    • 蜀ICP备13028337号-1 大数据知识库 https://www.saoniuhuo.com © All rights reserved
    • 本站内容来源互联网,如果侵犯您的权益请联系我们删除, 联系方式：448109455@qq.com