org.neo4j.graphdb.Relationship.getProperty()方法的使用及代码示例

x33g5p2x  于2022-01-28 转载在 其他  
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本文整理了Java中org.neo4j.graphdb.Relationship.getProperty方法的一些代码示例，展示了Relationship.getProperty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。Relationship.getProperty方法的具体详情如下：
包路径：org.neo4j.graphdb.Relationship
类名称：Relationship
方法名：getProperty

Relationship.getProperty介绍

暂无

代码示例

代码示例来源：origin: neo4j/neo4j

@Override
  public Double getCost( Relationship relationship, Direction direction )
  {
    return ( (Number) relationship.getProperty( costPropertyName, defaultCost ) ).doubleValue();
  }
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldStoreSuppliedPropertiesWhenCreatingRelationship() throws Exception
{
  Map<String, Object> properties = new HashMap<>();
  properties.put( "string", "value" );
  properties.put( "integer", 17 );
  long relId = actions.createRelationship( graphdbHelper.createNode(), graphdbHelper.createNode(), "LOVES",
      properties )
      .getId();
  try ( Transaction tx = database.getGraph().beginTx() )
  {
    Relationship rel = database.getGraph().getRelationshipById( relId );
    for ( String key : rel.getPropertyKeys() )
    {
      assertTrue( "extra property stored", properties.containsKey( key ) );
    }
    for ( Map.Entry<String, Object> entry : properties.entrySet() )
    {
      assertEquals( entry.getValue(), rel.getProperty( entry.getKey() ) );
    }
  }
}

代码示例来源：origin: neo4j/neo4j

@Override
  public Double getCost( Relationship relationship, Direction direction )
  {
    Object costProp = relationship.getProperty(costPropertyName);
    if ( costProp instanceof Number )
    {
      return ((Number) costProp).doubleValue();
    }
    else
    {
      return Double.parseDouble(costProp.toString());
    }
  }
}

代码示例来源：origin: neo4j/neo4j

@Override
  public Integer getCost( Relationship relationship, Direction direction )
  {
    Object costProp = relationship.getProperty( costPropertyName );
    if ( costProp instanceof Number )
    {
      return ((Number) costProp).intValue();
    }
    else
    {
      return Integer.parseInt( costProp.toString() );
    }
  }
}

代码示例来源：origin: neo4j/neo4j

public Representation getRelationshipProperty( long relationshipId,
    String key ) throws NoSuchPropertyException,
    RelationshipNotFoundException
{
  Relationship relationship = relationship( relationshipId );
  try
  {
    return PropertiesRepresentation.value( relationship.getProperty( key ) );
  }
  catch ( NotFoundException e )
  {
    throw new NoSuchPropertyException( relationship, key );
  }
}

代码示例来源：origin: neo4j/neo4j

private Relationship findRelationship( Node startNode, final Node endNode, final RelationshipDataLine relationship )
{
  return Iterators.singleOrNull( Iterators.filter(
      item -> item.getEndNode().equals( endNode ) &&
          item.getProperty( "name" ).equals( relationship.name ),
      startNode.getRelationships( withName( relationship.type ) ).iterator() ) );
}

代码示例来源：origin: neo4j/neo4j

@Override
public Iterable<Relationship> expand( Path path, BranchState<Integer> state )
{
  if ( path.length() > 0 )
  {
    int newState = state.getState() + ((Number)path.lastRelationship().getProperty( "weight" )).intValue();
    state.setState( newState );
    encounteredState.put( path.endNode(), newState );
  }
  return path.endNode().getRelationships();
}

代码示例来源：origin: neo4j/neo4j

@Test
public void testGetDirectedRelationship()
{
  Node node1 = getGraphDb().getNodeById( node1Id );
  Relationship rel = node1.getSingleRelationship( MyRelTypes.TEST,
    Direction.OUTGOING );
  assertEquals( int1, rel.getProperty( key1 ) );
}

代码示例来源：origin: neo4j/neo4j

@Override
public Iterable<Relationship> expand( Path path, BranchState<Double> state )
{
  double newState = state.getState();
  if ( path.length() > 0 )
  {
    newState += (Double) path.lastRelationship().getProperty( "length" );
    state.setState( newState );
  }
  seenBranchStates.put( path.endNode(), newState );
  return path.endNode().getRelationships( OUTGOING );
}

代码示例来源：origin: neo4j/neo4j

@Override
  void perform( Graph graph, ExpectedTransactionData expectations )
  {
    Relationship relationship = graph.randomRelationship();
    if ( relationship != null )
    {
      String key = graph.randomPropertyKey();
      Object valueBefore = relationship.getProperty( key, null );
      Object value = graph.randomPropertyValue();
      relationship.setProperty( key, value );
      expectations.assignedProperty( relationship, key, value, valueBefore );
      debug( relationship + " " + key + "=" + value + " prev " + valueBefore );
    }
  }
},

代码示例来源：origin: neo4j/neo4j

@Test
public void testChangeProperty2()
{
  // Create relationship with "test"="test1"
  Node node1 = getGraphDb().createNode();
  Node node2 = getGraphDb().createNode();
  Relationship rel = node1.createRelationshipTo( node2, TEST );
  rel.setProperty( "test", "test1" );
  newTransaction(); // commit
  // Remove "test" and set "test"="test3" instead
  rel.removeProperty( "test" );
  rel.setProperty( "test", "test3" );
  assertEquals( "test3", rel.getProperty( "test" ) );
  newTransaction(); // commit
  // Remove "test" and set "test"="test4" instead
  assertEquals( "test3", rel.getProperty( "test" ) );
  rel.removeProperty( "test" );
  rel.setProperty( "test", "test4" );
  newTransaction(); // commit
  // Should still be "test4"
  assertEquals( "test4", rel.getProperty( "test" ) );
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldUpdatePropertyToRelationshipInTransaction() throws Exception
{
  // Given
  long  relationshipId;
  String propertyKey = "prop";
  try ( org.neo4j.graphdb.Transaction tx = graphDb.beginTx() )
  {
    Node node1 = graphDb.createNode();
    Node node2 = graphDb.createNode();
    relationshipId = node1.createRelationshipTo( node2, RelationshipType.withName( "R" ) ).getId();
    tx.success();
  }
  // When
  try ( Transaction tx = beginTransaction() )
  {
    int token = tx.token().propertyKeyGetOrCreateForName( propertyKey );
    assertThat( tx.dataWrite().relationshipSetProperty( relationshipId, token, stringValue( "hello" ) ), equalTo( NO_VALUE ) );
    assertThat( tx.dataWrite().relationshipSetProperty( relationshipId, token, stringValue( "world" ) ), equalTo( stringValue( "hello" ) ) );
    assertThat( tx.dataWrite().relationshipSetProperty( relationshipId, token, intValue( 1337 ) ), equalTo( stringValue( "world" ) ) );
    tx.success();
  }
  // Then
  try ( org.neo4j.graphdb.Transaction ignore = graphDb.beginTx() )
  {
    assertThat( graphDb.getRelationshipById( relationshipId ).getProperty( "prop" ), equalTo( 1337 ) );
  }
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldAddPropertyToRelationship() throws Exception
{
  // Given
  long  relationshipId;
  String propertyKey = "prop";
  try ( org.neo4j.graphdb.Transaction tx = graphDb.beginTx() )
  {
    Node node1 = graphDb.createNode();
    Node node2 = graphDb.createNode();
    relationshipId = node1.createRelationshipTo( node2, RelationshipType.withName( "R" ) ).getId();
    tx.success();
  }
  // When
  try ( Transaction tx = beginTransaction() )
  {
    int token = tx.token().propertyKeyGetOrCreateForName( propertyKey );
    assertThat( tx.dataWrite().relationshipSetProperty( relationshipId, token, stringValue( "hello" ) ), equalTo( NO_VALUE ) );
    tx.success();
  }
  // Then
  try ( org.neo4j.graphdb.Transaction ignore = graphDb.beginTx() )
  {
    assertThat( graphDb.getRelationshipById( relationshipId ).getProperty( "prop" ), equalTo( "hello" ) );
  }
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldBeAbleToForceTypeChangeOfProperty()
{
  // Given
  Relationship relationship;
  try ( Transaction tx = db.beginTx() )
  {
    relationship = db.createNode().createRelationshipTo( db.createNode(), withName( "R" ) );
    relationship.setProperty( "prop", 1337 );
    tx.success();
  }
  // When
  try ( Transaction tx = db.beginTx() )
  {
    relationship.setProperty( "prop", 1337.0 );
    tx.success();
  }
  // Then
  try ( Transaction ignore = db.beginTx() )
  {
    assertThat( relationship.getProperty( "prop" ), instanceOf( Double.class ) );
  }
}

代码示例来源：origin: neo4j/neo4j

@Test
public void testChangeProperty()
{
  Node node1 = getGraphDb().createNode();
  Node node2 = getGraphDb().createNode();
  Relationship rel = node1.createRelationshipTo( node2, TEST );
  rel.setProperty( "test", "test1" );
  newTransaction();
  rel.setProperty( "test", "test2" );
  rel.removeProperty( "test" );
  rel.setProperty( "test", "test3" );
  assertEquals( "test3", rel.getProperty( "test" ) );
  rel.removeProperty( "test" );
  rel.setProperty( "test", "test4" );
  newTransaction();
  assertEquals( "test4", rel.getProperty( "test" ) );
}

代码示例来源：origin: neo4j/neo4j

@Test
public void testRelationshipChangeProperty2()
{
  Integer int1 = 1;
  Integer int2 = 2;
  String string1 = "1";
  String string2 = "2";
  Node node1 = getGraphDb().createNode();
  Node node2 = getGraphDb().createNode();
  Relationship rel1 = node1.createRelationshipTo( node2, TEST );
  rel1.setProperty( key1, int1 );
  rel1.setProperty( key1, int2 );
  assertEquals( int2, rel1.getProperty( key1 ) );
  rel1.removeProperty( key1 );
  rel1.setProperty( key1, string1 );
  rel1.setProperty( key1, string2 );
  assertEquals( string2, rel1.getProperty( key1 ) );
  rel1.removeProperty( key1 );
  rel1.setProperty( key1, true );
  rel1.setProperty( key1, false );
  assertEquals( false, rel1.getProperty( key1 ) );
  rel1.removeProperty( key1 );
  rel1.delete();
  node2.delete();
  node1.delete();
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldUpdatePropertyToRelationship() throws Exception
{
  // Given
  long  relationshipId;
  String propertyKey = "prop";
  try ( org.neo4j.graphdb.Transaction tx = graphDb.beginTx() )
  {
    Node node1 = graphDb.createNode();
    Node node2 = graphDb.createNode();
    Relationship r = node1.createRelationshipTo( node2, RelationshipType.withName( "R" ) );
    r.setProperty( propertyKey, 42  );
    relationshipId = r.getId();
    tx.success();
  }
  // When
  try ( Transaction tx = beginTransaction() )
  {
    int token = tx.token().propertyKeyGetOrCreateForName( propertyKey );
    assertThat( tx.dataWrite().relationshipSetProperty( relationshipId, token, stringValue( "hello" ) ),
        equalTo( intValue( 42 ) ) );
    tx.success();
  }
  // Then
  try ( org.neo4j.graphdb.Transaction ignore = graphDb.beginTx() )
  {
    assertThat( graphDb.getRelationshipById( relationshipId ).getProperty( "prop" ), equalTo( "hello" ) );
  }
}

代码示例来源：origin: neo4j/neo4j

@Test
public void testRevertOverflowingChange()
{
  Relationship rel = getGraphDb().createNode()
                  .createRelationshipTo( getGraphDb().createNode(),
                      RelationshipType.withName( "INVALIDATES" ) );
  long recordsInUseAtStart = propertyRecordsInUse();
  long valueRecordsInUseAtStart = dynamicArrayRecordsInUse();
  rel.setProperty( "theByte", (byte) -8 );
  rel.setProperty( "theDoubleThatGrows", Math.PI );
  rel.setProperty( "theInteger", -444345 );
  rel.setProperty( "theDoubleThatGrows", new long[] { 1L << 63, 1L << 63, 1L << 63 } );
  rel.setProperty( "theDoubleThatGrows", Math.E );
  // When
  newTransaction();
  // Then
  /*
   * The following line should pass if we have packing on property block
   * size shrinking.
   */
  // assertEquals( recordsInUseAtStart + 1, propertyRecordsInUse() );
  assertEquals( recordsInUseAtStart + 1, propertyRecordsInUse() );
  assertEquals( valueRecordsInUseAtStart, dynamicArrayRecordsInUse() );
  assertEquals( (byte) -8, rel.getProperty( "theByte" ) );
  assertEquals( -444345, rel.getProperty( "theInteger" ) );
  assertEquals( Math.E, rel.getProperty( "theDoubleThatGrows" ) );
}

代码示例来源：origin: neo4j/neo4j

@Test
public void testRelMultiRemoveProperty()
{
  Node node1 = getGraphDb().createNode();
  Node node2 = getGraphDb().createNode();
  Relationship rel = node1.createRelationshipTo( node2, MyRelTypes.TEST );
  rel.setProperty( "key0", "0" );
  rel.setProperty( "key1", "1" );
  rel.setProperty( "key2", "2" );
  rel.setProperty( "key3", "3" );
  rel.setProperty( "key4", "4" );
  newTransaction();
  rel.removeProperty( "key3" );
  rel.removeProperty( "key2" );
  rel.removeProperty( "key3" );
  newTransaction();
  assertEquals( "0", rel.getProperty( "key0" ) );
  assertEquals( "1", rel.getProperty( "key1" ) );
  assertEquals( "4", rel.getProperty( "key4" ) );
  assertTrue( !rel.hasProperty( "key2" ) );
  assertTrue( !rel.hasProperty( "key3" ) );
  rel.delete();
  node1.delete();
  node2.delete();
}

代码示例来源：origin: neo4j/neo4j

@Test
public void testSameTxWithArray()
{
  commit();
  newTransaction();
  Node nodeA = getGraphDb().createNode();
  Node nodeB = getGraphDb().createNode();
  Relationship relA = nodeA.createRelationshipTo( nodeB, MyRelTypes.TEST );
  nodeA.setProperty( arrayKey, array );
  relA.setProperty( arrayKey, array );
  assertNotNull( nodeA.getProperty( arrayKey ) );
  assertNotNull( relA.getProperty( arrayKey ) );
  relA.delete();
  nodeA.delete();
  nodeB.delete();
}

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