org.neo4j.driver.v1.types.Node.get()方法的使用及代码示例

x33g5p2x  于2022-01-25 转载在 其他  
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本文整理了Java中org.neo4j.driver.v1.types.Node.get()方法的一些代码示例，展示了Node.get()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.get()方法的具体详情如下：
包路径：org.neo4j.driver.v1.types.Node
类名称：Node
方法名：get

Node.get介绍

暂无

代码示例

代码示例来源：origin: hibernate/hibernate-ogm

private static Object[] keyValues(Node node, EntityKeyMetadata entityKeyMetadata) {
    Object[] values = new Object[entityKeyMetadata.getColumnNames().length];
    for ( int i = 0; i < values.length; i++ ) {
      values[i] = node.get( entityKeyMetadata.getColumnNames()[i] );
    }
    return values;
  }
}

代码示例来源：origin: hibernate/hibernate-ogm

private Object readProperty(Node node, String targetColumnName) {
  if ( node.containsKey( targetColumnName ) ) {
    return node.get( targetColumnName ).asObject();
  }
  return null;
}

代码示例来源：origin: no.ssb.lds/linked-data-store-persistence-provider-neo4j

String key = field.key();
if ("r".equals(key)) {
  String rid = field.value().asNode().get("id").asString();
  if (id != null && !id.equals(rid)) {
    continue;
  Value pathValue = value.asNode().get("path");
  String pathWithoutIndices = pathValue.asString();
  if (pathWithIndices == null) {
    throw new IllegalStateException("Unable to determine path with indices");
  Value typeValue = value.asNode().get("type");
  String type = typeValue.asString();
  Value valueValue = value.asNode().get("value");
  if ("string".equals(type)) {
    String stringValue = valueValue.asString();

代码示例来源：origin: opencypher/cypher-for-gremlin

@Test
public void returnNodeAndRelationship() {
  Driver driver = GremlinDatabase.driver("//localhost:" + server.getPort());
  try (Session session = driver.session()) {
    StatementResult result = session.run("CREATE (n1:Person {name: 'Marko'})-[r:knows {since:1999}]->(n2:Person)" +
        "RETURN n1,r,n2",
      parameters("message", "Hello"));
    Record record = result.single();
    Node n1 = record.get("n1").asNode();
    Relationship r = record.get("r").asRelationship();
    Node n2 = record.get("n2").asNode();
    assertThat(n1.hasLabel("Person")).isTrue();
    assertThat(n1.get("name").asString()).isEqualTo("Marko");
    assertThat(r.hasType("knows")).isTrue();
    assertThat(r.startNodeId()).isEqualTo(n1.id());
    assertThat(r.endNodeId()).isEqualTo(n2.id());
    assertThat(r.get("since").asLong()).isEqualTo(1999L);
    assertThat(n2.hasLabel("Person")).isTrue();
  }
}

代码示例来源：origin: h-omer/neo4j-versioner-core

@Test
public void shouldCreateACopyOfTheCurrentStateIfPatchedWithoutStateProps() throws Throwable {
  // This is in a try-block, to make sure we close the driver after the test
  try (Driver driver = GraphDatabase
      .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
    // Given
    session.run("CREATE (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'})");
    session.run("MATCH (e:Entity)-[:CURRENT]->(s:State) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
    StatementResult stateResult = session.run("MATCH (s:State) RETURN s");
    Node state = stateResult.single().get("s").asNode();
    // When
    StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.patch(e) YIELD node RETURN node");
    // Then
    Node newState = result.single().get("node").asNode();
    assertThat(state.get("key"), equalTo(newState.get("key")));
    assertThat(state.size(), equalTo(newState.size()));
  }
}

代码示例来源：origin: h-omer/neo4j-versioner-core

@Test
public void shouldCreateAndPatchANewStateWithoutAdditionalLabelAndDate() throws Throwable {
  // This is in a try-block, to make sure we close the driver after the test
  try (Driver driver = GraphDatabase
      .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
    // Given
    session.run("CREATE (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'})");
    session.run("MATCH (e:Entity)-[:CURRENT]->(s:State) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
    // When
    StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.patch(e, {key:'newValue', newKey:'newestValue'}) YIELD node RETURN node");
    Node currentState = result.single().get("node").asNode();
    StatementResult countStateResult = session.run("MATCH (s:State) RETURN count(s) as s");
    StatementResult nextResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) return s2");
    StatementResult correctStateResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) WITH s1 MATCH (e:Entity)-[:CURRENT]->(s1) return e");
    // Then
    assertThat(countStateResult.single().get("s").asLong(), equalTo(2L));
    assertThat(nextResult.single().get("s2").asNode().id(), equalTo(1L));
    assertThat(correctStateResult.single().get("e").asNode().id(), equalTo(0L));
    assertThat(currentState.get("key").asString(), equalTo("newValue"));
    assertThat(currentState.get("newKey").asString(), equalTo("newestValue"));
  }
}

代码示例来源：origin: h-omer/neo4j-versioner-core

@Test
public void shouldCreateAndPatchANewStateWithAdditionalLabelButWithoutDate() throws Throwable {
  // This is in a try-block, to make sure we close the driver after the test
  try (Driver driver = GraphDatabase
      .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
    // Given
    session.run("CREATE (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'})");
    session.run("MATCH (e:Entity)-[:CURRENT]->(s:State) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
    // When
    StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.patch(e, {key:'newValue', newKey:'newestValue'}, 'Error') YIELD node RETURN node");
    Node currentState = result.single().get("node").asNode();
    StatementResult countStateResult = session.run("MATCH (s:State) RETURN count(s) as s");
    StatementResult nextResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) return s2");
    StatementResult correctStateResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) WITH s1 MATCH (e:Entity)-[:CURRENT]->(s1) return e");
    StatementResult currentStateResult = session.run("MATCH (e:Entity)-[:CURRENT]->(s) return s");
    // Then
    assertThat(countStateResult.single().get("s").asLong(), equalTo(2L));
    assertThat(nextResult.single().get("s2").asNode().id(), equalTo(1L));
    assertThat(correctStateResult.single().get("e").asNode().id(), equalTo(0L));
    assertThat(currentStateResult.single().get("s").asNode().hasLabel("Error"), equalTo(true));
    assertThat(currentState.get("key").asString(), equalTo("newValue"));
    assertThat(currentState.get("newKey").asString(), equalTo("newestValue"));
  }
}

代码示例来源：origin: h-omer/neo4j-versioner-core

@Test
public void shouldCreateACopyOfTheGivenStateWithoutAdditionalDate() throws Throwable {
  // This is in a try-block, to make sure we close the driver after the test
  try (Driver driver = GraphDatabase
      .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
    // Given
    session.run("CREATE (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue', newKey:'oldestValue'})");
    session.run("MATCH (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'}) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
    session.run("MATCH (e:Entity) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-26T00:00:00'), endDate:localdatetime('1988-10-27T00:00:00')}]->(s:State:Test {newKey:'newestValue'})");
    session.run("MATCH (sc:State)<-[:CURRENT]-(e:Entity)-[:HAS_STATE]->(s:Test) CREATE (sc)-[:PREVIOUS {date:localdatetime('1988-10-26T00:00:00')}]->(s)");
    StatementResult stateResult = session.run("MATCH (s:Test) RETURN s");
    Node originalState = stateResult.single().get("s").asNode();
    // When
    StatementResult result = session.run("MATCH (e:Entity)-[:HAS_STATE]->(s:Test) WITH e, s CALL graph.versioner.patch.from(e, s) YIELD node RETURN node");
    Node currentState = result.single().get("node").asNode();
    StatementResult countStateResult = session.run("MATCH (s:State) RETURN count(s) as s");
    StatementResult correctStateResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) WITH s1 MATCH (e:Entity)-[:CURRENT]->(s1) return e");
    // Then
    assertThat(countStateResult.single().get("s").asLong(), equalTo(3L));
    assertThat(correctStateResult.single().get("e").asNode().id(), equalTo(0L));
    assertThat(currentState.get("key").asString(), equalTo("initialValue"));
    assertThat(currentState.get("newKey").asString(), equalTo("newestValue"));
  }
}

代码示例来源：origin: h-omer/neo4j-versioner-core

@Test
public void shouldCreateAndPatchANewStateWithAdditionalLabelAndDateButWithANewProp() throws Throwable {
  // This is in a try-block, to make sure we close the driver after the test
  try (Driver driver = GraphDatabase
      .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
    // Given
    session.run("CREATE (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'})");
    session.run("MATCH (e:Entity)-[:CURRENT]->(s:State) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
    // When
    StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.patch(e, {newKey:'newestValue'}, 'Error', localdatetime('1988-10-27T02:46:40')) YIELD node RETURN node");
    Node currentState = result.single().get("node").asNode();
    StatementResult countStateResult = session.run("MATCH (s:State) RETURN count(s) as s");
    StatementResult nextResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) return s2");
    StatementResult correctStateResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) WITH s1 MATCH (e:Entity)-[:CURRENT]->(s1) return e");
    StatementResult currentStateResult = session.run("MATCH (e:Entity)-[:CURRENT]->(s) return s");
    StatementResult dateResult = session.run("MATCH (e:Entity)-[r:CURRENT]->(s) RETURN r.date as relDate");
    StatementResult hasStatusDateResult = session.run("MATCH (e:Entity)-[:CURRENT]->(s:State)-[:PREVIOUS]->(s2:State)<-[rel:HAS_STATE]-(e) RETURN rel.endDate as endDate");
    // Then
    assertThat(countStateResult.single().get("s").asLong(), equalTo(2L));
    assertThat(nextResult.single().get("s2").asNode().id(), equalTo(1L));
    assertThat(correctStateResult.single().get("e").asNode().id(), equalTo(0L));
    assertThat(currentStateResult.single().get("s").asNode().hasLabel("Error"), equalTo(true));
    assertThat(dateResult.single().get("relDate").asLocalDateTime(), equalTo(convertEpochToLocalDateTime(593920000000L)));
    assertThat(hasStatusDateResult.single().get("endDate").asLocalDateTime(), equalTo(convertEpochToLocalDateTime(593920000000L)));
    assertThat(currentState.get("key").asString(), equalTo("initialValue"));
    assertThat(currentState.get("newKey").asString(), equalTo("newestValue"));
  }
}

代码示例来源：origin: h-omer/neo4j-versioner-core

@Test
public void shouldCreateAndPatchANewStateWithAdditionalLabelAndDate() throws Throwable {
  // This is in a try-block, to make sure we close the driver after the test
  try (Driver driver = GraphDatabase
      .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
    // Given
    session.run("CREATE (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'})");
    session.run("MATCH (e:Entity)-[:CURRENT]->(s:State) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
    // When
    StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.patch(e, {key:'newValue', newKey:'newestValue'}, 'Error', localdatetime('1988-10-27T02:46:40')) YIELD node RETURN node");
    Node currentState = result.single().get("node").asNode();
    StatementResult countStateResult = session.run("MATCH (s:State) RETURN count(s) as s");
    StatementResult nextResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) return s2");
    StatementResult correctStateResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) WITH s1 MATCH (e:Entity)-[:CURRENT]->(s1) return e");
    StatementResult currentStateResult = session.run("MATCH (e:Entity)-[:CURRENT]->(s) return s");
    StatementResult dateResult = session.run("MATCH (e:Entity)-[r:CURRENT]->(s) RETURN r.date as relDate");
    StatementResult hasStatusDateResult = session.run("MATCH (e:Entity)-[:CURRENT]->(s:State)-[:PREVIOUS]->(s2:State)<-[rel:HAS_STATE]-(e) RETURN rel.endDate as endDate");
    // Then
    assertThat(countStateResult.single().get("s").asLong(), equalTo(2L));
    assertThat(nextResult.single().get("s2").asNode().id(), equalTo(1L));
    assertThat(correctStateResult.single().get("e").asNode().id(), equalTo(0L));
    assertThat(currentStateResult.single().get("s").asNode().hasLabel("Error"), equalTo(true));
    assertThat(dateResult.single().get("relDate").asLocalDateTime(), equalTo(convertEpochToLocalDateTime(593920000000L)));
    assertThat(hasStatusDateResult.single().get("endDate").asLocalDateTime(), equalTo(convertEpochToLocalDateTime(593920000000L)));
    assertThat(currentState.get("key").asString(), equalTo("newValue"));
    assertThat(currentState.get("newKey").asString(), equalTo("newestValue"));
  }
}

代码示例来源：origin: h-omer/neo4j-versioner-core

@Test
public void shouldCreateACopyOfTheGivenStateWithAdditionalDate() throws Throwable {
  // This is in a try-block, to make sure we close the driver after the test
  try (Driver driver = GraphDatabase
      .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
    // Given
    session.run("CREATE (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue', newKey:'oldestValue'})");
    session.run("MATCH (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'}) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
    session.run("MATCH (e:Entity) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-26T00:00:00'), endDate:localdatetime('1988-10-27T00:00:00')}]->(s:State:Test {newKey:'newestValue'})");
    session.run("MATCH (sc:State)<-[:CURRENT]-(e:Entity)-[:HAS_STATE]->(s:Test) CREATE (sc)-[:PREVIOUS {date:localdatetime('1988-10-26T00:00:00')}]->(s)");
    StatementResult stateResult = session.run("MATCH (s:Test) RETURN s");
    Node originalState = stateResult.single().get("s").asNode();
    // When
    StatementResult result = session.run("MATCH (e:Entity)-[:HAS_STATE]->(s:Test) WITH e, s CALL graph.versioner.patch.from(e, s, false, localdatetime('1988-10-27T02:46:40')) YIELD node RETURN node");
    Node currentState = result.single().get("node").asNode();
    StatementResult countStateResult = session.run("MATCH (s:State) RETURN count(s) as s");
    StatementResult correctStateResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) WITH s1 MATCH (e:Entity)-[:CURRENT]->(s1) return e");
    StatementResult dateResult = session.run("MATCH (e:Entity)-[r:CURRENT]->(s) RETURN r.date as relDate");
    StatementResult hasStatusDateResult = session.run("MATCH (e:Entity)-[:CURRENT]->(s:State)-[:PREVIOUS]->(s2:State)<-[rel:HAS_STATE]-(e) RETURN rel.endDate as endDate");
    // Then
    assertThat(countStateResult.single().get("s").asLong(), equalTo(3L));
    assertThat(correctStateResult.single().get("e").asNode().id(), equalTo(0L));
    assertThat(currentState.get("key").asString(), equalTo("initialValue"));
    assertThat(currentState.get("newKey").asString(), equalTo("newestValue"));
    assertThat(dateResult.single().get("relDate").asLocalDateTime(), equalTo(convertEpochToLocalDateTime(593920000000L)));
    assertThat(hasStatusDateResult.single().get("endDate").asLocalDateTime(), equalTo(convertEpochToLocalDateTime(593920000000L)));
  }
}

代码示例来源：origin: h-omer/neo4j-versioner-core

@Test
public void shouldCreateACopyOfTheGivenStateWithAdditionalDateButWithANewProp() throws Throwable {
  // This is in a try-block, to make sure we close the driver after the test
  try (Driver driver = GraphDatabase
      .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
    // Given
    session.run("CREATE (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'})");
    session.run("MATCH (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'}) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
    session.run("MATCH (e:Entity) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-26T00:00:00'), endDate:localdatetime('1988-10-27T00:00:00')}]->(s:State:Test {newKey:'newestValue'})");
    session.run("MATCH (sc:State)<-[:CURRENT]-(e:Entity)-[:HAS_STATE]->(s:Test) CREATE (sc)-[:PREVIOUS {date:localdatetime('1988-10-26T00:00:00')}]->(s)");
    StatementResult stateResult = session.run("MATCH (s:Test) RETURN s");
    Node originalState = stateResult.single().get("s").asNode();
    // When
    StatementResult result = session.run("MATCH (e:Entity)-[:HAS_STATE]->(s:Test) WITH e, s CALL graph.versioner.patch.from(e, s, false,localdatetime('1988-10-27T02:46:40')) YIELD node RETURN node");
    Node currentState = result.single().get("node").asNode();
    StatementResult countStateResult = session.run("MATCH (s:State) RETURN count(s) as s");
    StatementResult correctStateResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) WITH s1 MATCH (e:Entity)-[:CURRENT]->(s1) return e");
    StatementResult dateResult = session.run("MATCH (e:Entity)-[r:CURRENT]->(s) RETURN r.date as relDate");
    StatementResult hasStatusDateResult = session.run("MATCH (e:Entity)-[:CURRENT]->(s:State)-[:PREVIOUS]->(s2:State)<-[rel:HAS_STATE]-(e) RETURN rel.endDate as endDate");
    // Then
    //assertThat(currentState.id(), equalTo(21L));
    assertThat(countStateResult.single().get("s").asLong(), equalTo(3L));
    assertThat(correctStateResult.single().get("e").asNode().id(), equalTo(0L));
    assertThat(currentState.get("key").asString(), equalTo("initialValue"));
    assertThat(currentState.get("newKey").asString(), equalTo("newestValue"));
    assertThat(dateResult.single().get("relDate").asLocalDateTime(), equalTo(convertEpochToLocalDateTime(593920000000L)));
    assertThat(hasStatusDateResult.single().get("endDate").asLocalDateTime(), equalTo(convertEpochToLocalDateTime(593920000000L)));
  }
}

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