org.neo4j.graphdb.Node.removeProperty()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.removeProperty()方法的一些代码示例，展示了Node.removeProperty()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.removeProperty()方法的具体详情如下：
包路径：org.neo4j.graphdb.Node
类名称：Node
方法名：removeProperty

Node.removeProperty介绍

暂无

代码示例

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldHandleRemovePropertyConcurrentlyWithIndexDrop() throws Throwable
{
  shouldHandleIndexDropConcurrentlyWithOperation( nodeId -> db.getNodeById( nodeId ).removeProperty( KEY ) );
}

代码示例来源：origin: neo4j/neo4j

@SuppressWarnings( "boxing" )
@Override
public Void beforeCommit( TransactionData data )
{
  if ( Iterables.count( data.createdRelationships() ) == 0 )
  {
    return null;
  }
  node.setProperty( "counter", ((Long) node.removeProperty( "counter" )) + 1 );
  return null;
}

代码示例来源：origin: neo4j/neo4j

@Test
public void largeTx()
{
  Node node = getGraphDb().createNode();
  node.setProperty( "anchor", "hi" );
  for ( int i = 0; i < 255; i++ )
  {
    node.setProperty( "foo", 1 );
    node.removeProperty( "foo" );
  }
  commit();
}

代码示例来源：origin: neo4j/neo4j

@Test
public void addAndRemovePropertiesWithinOneTransaction()
{
  Node node = getGraphDb().createNode();
  node.setProperty( "name", "oscar" );
  node.setProperty( "favourite_numbers", new Long[] { 1L, 2L, 3L } );
  node.setProperty( "favourite_colors", new String[] { "blue", "red" } );
  node.removeProperty( "favourite_colors" );
  newTransaction();
  assertNotNull( node.getProperty( "favourite_numbers", null ) );
}

代码示例来源：origin: neo4j/neo4j

@Test
public void testNodeRemoveProperty()
{
  Node node1 = getGraphDb().getNodeById( node1Id );
  Node node2 = getGraphDb().getNodeById( node2Id );
  Relationship rel = node1.getSingleRelationship( MyRelTypes.TEST,
    Direction.BOTH );
  // test remove property
  assertEquals( 1, node1.removeProperty( key1 ) );
  assertEquals( 2, node2.removeProperty( key1 ) );
  assertEquals( 1, rel.removeProperty( key1 ) );
  assertEquals( string1, node1.removeProperty( key2 ) );
  assertEquals( string2, node2.removeProperty( key2 ) );
  assertEquals( string1, rel.removeProperty( key2 ) );
  assertNotNull( node1.removeProperty( arrayKey ) );
  assertNotNull( node2.removeProperty( arrayKey ) );
  assertNotNull( rel.removeProperty( arrayKey ) );
}

代码示例来源：origin: neo4j/neo4j

private void setAndRemoveSomeProperties( GraphDatabaseService graphDatabaseService, Object value )
  {
    Node commonNode;
    try ( Transaction transaction = graphDatabaseService.beginTx() )
    {
      commonNode = graphDatabaseService.createNode();
      for ( int i = 0; i < 10; i++ )
      {
        commonNode.setProperty( "key" + i, value );
      }
      transaction.success();
    }

    try ( Transaction transaction = graphDatabaseService.beginTx() )
    {
      for ( int i = 0; i < 10; i++ )
      {
        commonNode.removeProperty( "key" + i );
      }
      transaction.success();
    }
  }
}

代码示例来源：origin: neo4j/neo4j

@Test
public void removingPropertyDoesNotBreakPreviouslyCreatedNodePropertyKeysIterator()
{
  // GIVEN
  GraphDatabaseService db = dbRule.getGraphDatabaseAPI();
  try ( Transaction tx = db.beginTx() )
  {
    Node node = db.createNode();
    node.setProperty( "name", "Horst" );
    node.setProperty( "age", "72" );
    Iterator<String> iterator = node.getPropertyKeys().iterator();
    while ( iterator.hasNext() )
    {
      node.removeProperty( iterator.next() );
    }
    tx.success();
  }
}

代码示例来源：origin: neo4j/neo4j

private void changeRandomNode( GraphDatabaseService db, int nodeCount, RandomValues random )
{
  try ( Transaction tx = db.beginTx() )
  {
    long nodeId = random.nextInt( nodeCount );
    Node node = db.getNodeById( nodeId );
    Object[] keys = Iterables.asCollection( node.getPropertyKeys() ).toArray();
    String key = (String) random.among( keys );
    if ( random.nextFloat() < 0.1 )
    {   // REMOVE
      node.removeProperty( key );
    }
    else
    {   // CHANGE
      node.setProperty( key, random.nextValue().asObject() );
    }
    tx.success();
  }
  catch ( NotFoundException e )
  {   // It's OK, it happens if some other thread deleted that property in between us reading it and
    // removing or setting it
  }
}

代码示例来源：origin: neo4j/neo4j

@Test
public void removeOneOfThree()
{
  Node node = getGraphDb().createNode();
  node.setProperty( "1", 1 );
  node.setProperty( "2", 2 );
  node.setProperty( "3", 3 );
  newTransaction();
  node.removeProperty( "2" );
  newTransaction();
  assertNull( node.getProperty( "2", null ) );
}

代码示例来源：origin: neo4j/neo4j

node.setProperty( key, random.nextValueAsObject() );
random.among( nodes, node -> node.setProperty( random.among( keys ), random.nextValueAsObject() ) );
random.among( nodes, node -> node.removeProperty( random.among( keys ) ) );

代码示例来源：origin: neo4j/neo4j

@Test
public void testNodeChangeProperty2()
{
  String key1 = "key1";
  Integer int1 = 1;
  Integer int2 = 2;
  String string1 = "1";
  String string2 = "2";
  Boolean bool1 = Boolean.TRUE;
  Boolean bool2 = Boolean.FALSE;
  Node node1 = getGraphDb().createNode();
  node1.setProperty( key1, int1 );
  node1.setProperty( key1, int2 );
  assertEquals( int2, node1.getProperty( key1 ) );
  node1.removeProperty( key1 );
  node1.setProperty( key1, string1 );
  node1.setProperty( key1, string2 );
  assertEquals( string2, node1.getProperty( key1 ) );
  node1.removeProperty( key1 );
  node1.setProperty( key1, bool1 );
  node1.setProperty( key1, bool2 );
  assertEquals( bool2, node1.getProperty( key1 ) );
  node1.removeProperty( key1 );
  node1.delete();
}

代码示例来源：origin: neo4j/neo4j

if ( random.nextBoolean() )
  node.setProperty( randomKey(), random.nextValueAsObject() );
random.among( nodes, node -> node.setProperty( randomKey(), random.nextValueAsObject() ) );
random.among( nodes, node -> node.removeProperty( randomKey() ) );

代码示例来源：origin: neo4j/neo4j

@Test
public void removeAndAddSameProperty()
{
  Node node = getGraphDb().createNode();
  node.setProperty( "foo", "bar" );
  newTransaction();
  node.removeProperty( "foo" );
  node.setProperty( "foo", "bar" );
  newTransaction();
  assertEquals( "bar", node.getProperty( "foo" ) );
  node.setProperty( "foo", "bar" );
  node.removeProperty( "foo" );
  newTransaction();
  assertNull( node.getProperty( "foo", null ) );
}

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

Object catValue = cat.getProperty(copiedKey, null);
      if (catValue == null) {
        cat.setProperty(copiedKey, copiedValue);
        node.removeProperty(copiedKey);
      } else if (copiedValue.equals(catValue)) {
        node.removeProperty(copiedKey);
node.removeProperty(sourceKey);

代码示例来源：origin: neo4j/neo4j

@Test
public void testChangeProperty()
{
  Node node = getGraphDb().createNode();
  node.setProperty( "test", "test1" );
  tx.success();
  tx.begin();
  node.setProperty( "test", "test2" );
  node.removeProperty( "test" );
  node.setProperty( "test", "test3" );
  assertEquals( "test3", node.getProperty( "test" ) );
  node.removeProperty( "test" );
  node.setProperty( "test", "test4" );
  tx.success();
  tx.begin();
  assertEquals( "test4", node.getProperty( "test" ) );
}

代码示例来源：origin: SciGraph/SciGraph

public void dropIndex() {
 if (indexExists()) {
  Transaction tx = graphDb.beginTx();
  // ...cleanup the index.
  int counter = 0;
  for (Node n : graphDb.getAllNodes()) {
   n.removeProperty(IN_LIST_PROPERTY);
   n.removeProperty(OUT_LIST_PROPERTY);
   tx = batchTransactions(tx, counter++);
  }
  // reset the flag.
  metaDataNode.setProperty(INDEX_EXISTS_PROPERTY, false);
  tx.success();
  tx.close();
  logger.info("Reachability index dropped.");
 } else {
  logger.warning("There was no reachability index to drop.");
 }
}

代码示例来源：origin: neo4j/neo4j

@Test
public void testNodeRemoveProperty()
    if ( node1.removeProperty( key1 ) != null )
    node1.removeProperty( null );
    fail( "Remove null property should throw exception." );
  node1.setProperty( key1, int1 );
  node2.setProperty( key1, string1 );
  node1.setProperty( key2, string2 );
  node2.setProperty( key2, int2 );
  try
    node1.removeProperty( null );
    fail( "Null argument should result in exception." );
  assertEquals( int1, node1.removeProperty( key1 ) );
  assertEquals( string1, node2.removeProperty( key1 ) );
    if ( node2.removeProperty( key1 ) != null )

代码示例来源：origin: neo4j/neo4j

@Test
public void addAndRemovePropertiesWithinOneTransaction2()
{
  Node node = getGraphDb().createNode();
  node.setProperty( "foo", "bar" );
  newTransaction();
  node.setProperty( "foo2", "bar" );
  node.removeProperty( "foo" );
  newTransaction();
  try
  {
    node.getProperty( "foo" );
    fail( "property should not exist" );
  }
  catch ( NotFoundException e )
  {
    // good
  }
}

代码示例来源：origin: neo4j/neo4j

@Test
public void testNodeMultiRemoveProperty()
{
  Node node = getGraphDb().createNode();
  node.setProperty( "key0", "0" );
  node.setProperty( "key1", "1" );
  node.setProperty( "key2", "2" );
  node.setProperty( "key3", "3" );
  node.setProperty( "key4", "4" );
  newTransaction();
  node.removeProperty( "key3" );
  node.removeProperty( "key2" );
  node.removeProperty( "key3" );
  newTransaction();
  assertEquals( "0", node.getProperty( "key0" ) );
  assertEquals( "1", node.getProperty( "key1" ) );
  assertEquals( "4", node.getProperty( "key4" ) );
  assertTrue( !node.hasProperty( "key2" ) );
  assertTrue( !node.hasProperty( "key3" ) );
  node.delete();
}

代码示例来源：origin: neo4j/neo4j

@Test
public void testAdditionHappensInTheMiddleIfItFits()
{
  Node node = getGraphDb().createNode();
  long recordsInUseAtStart = propertyRecordsInUse();
  node.setProperty( "int1", 1 );
  node.setProperty( "double1", 1.0 );
  node.setProperty( "int2", 2 );
  int stuffedShortStrings = 0;
  for ( ; stuffedShortStrings < PropertyType.getPayloadSizeLongs(); stuffedShortStrings++ )
  {
    node.setProperty( "shortString" + stuffedShortStrings, String.valueOf( stuffedShortStrings ) );
  }
  newTransaction();
  assertEquals( recordsInUseAtStart + 2, propertyRecordsInUse() );
  node.removeProperty( "shortString" + 1 );
  node.setProperty( "int3", 3 );
  newTransaction();
  assertEquals( recordsInUseAtStart + 2, propertyRecordsInUse() );
}

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