Examples with Statement org.neo4j.kernel.api.Statement used on opensource projects

Example 31 with Statement

use of org.neo4j.kernel.api.Statement in project neo4j by neo4j.

the class SchemaImpl method getConstraints.

@Override
public Iterable<ConstraintDefinition> getConstraints(RelationshipType type) {
    actions.assertInOpenTransaction();
    try (Statement statement = statementContextSupplier.get()) {
        int typeId = statement.readOperations().relationshipTypeGetForName(type.name());
        if (typeId == KeyReadOperations.NO_SUCH_RELATIONSHIP_TYPE) {
            return emptyList();
        }
        Iterator<ConstraintDescriptor> constraints = statement.readOperations().constraintsGetForRelationshipType(typeId);
        return asConstraintDefinitions(constraints, statement.readOperations());
    }
}

Example 32 with Statement

use of org.neo4j.kernel.api.Statement in project neo4j by neo4j.

the class SchemaImpl method getIndexes.

@Override
public Iterable<IndexDefinition> getIndexes() {
    try (Statement statement = statementContextSupplier.get()) {
        List<IndexDefinition> definitions = new ArrayList<>();
        addDefinitions(definitions, statement.readOperations(), statement.readOperations().indexesGetAll(), false);
        addDefinitions(definitions, statement.readOperations(), statement.readOperations().uniqueIndexesGetAll(), true);
        return definitions;
    }
}

Example 33 with Statement

use of org.neo4j.kernel.api.Statement in project neo4j by neo4j.

the class GraphDatabaseFacade method nodesByLabelAndProperty.

private ResourceIterator<Node> nodesByLabelAndProperty(Label myLabel, String key, Object value) {
    Statement statement = spi.currentStatement();
    ReadOperations readOps = statement.readOperations();
    int propertyId = readOps.propertyKeyGetForName(key);
    int labelId = readOps.labelGetForName(myLabel.name());
    if (propertyId == NO_SUCH_PROPERTY_KEY || labelId == NO_SUCH_LABEL) {
        statement.close();
        return emptyIterator();
    }
    NewIndexDescriptor descriptor = findAnyIndexByLabelAndProperty(readOps, propertyId, labelId);
    try {
        if (null != descriptor) {
            // Ha! We found an index - let's use it to find matching nodes
            IndexQuery.ExactPredicate query = IndexQuery.exact(descriptor.schema().getPropertyId(), value);
            return map2nodes(readOps.indexQuery(descriptor, query), statement);
        }
    } catch (KernelException e) {
    // weird at this point but ignore and fallback to a label scan
    }
    return getNodesByLabelAndPropertyWithoutIndex(propertyId, value, statement, labelId);
}

Example 34 with Statement

use of org.neo4j.kernel.api.Statement in project neo4j by neo4j.

the class Neo4jTransactionalContextFactory method create.

@Deprecated
public static TransactionalContextFactory create(GraphDatabaseQueryService queryService, PropertyContainerLocker locker) {
    DependencyResolver resolver = queryService.getDependencyResolver();
    ThreadToStatementContextBridge txBridge = resolver.resolveDependency(ThreadToStatementContextBridge.class);
    Guard guard = resolver.resolveDependency(Guard.class);
    Neo4jTransactionalContext.Creator contextCreator = (Supplier<Statement> statementSupplier, InternalTransaction tx, Statement initialStatement, ExecutingQuery executingQuery) -> new Neo4jTransactionalContext(queryService, statementSupplier, guard, txBridge, locker, tx, initialStatement, executingQuery);
    return new Neo4jTransactionalContextFactory(txBridge, contextCreator);
}

Example 35 with Statement

use of org.neo4j.kernel.api.Statement in project neo4j by neo4j.

the class Neo4jTransactionalContextFactory method newContext.

@Override
public final Neo4jTransactionalContext newContext(ClientConnectionInfo clientConnection, InternalTransaction tx, String queryText, Map<String, Object> queryParameters) {
    Statement initialStatement = statementSupplier.get();
    ClientConnectionInfo connectionWithUserName = clientConnection.withUsername(tx.securityContext().subject().username());
    ExecutingQuery executingQuery = initialStatement.queryRegistration().startQueryExecution(connectionWithUserName, queryText, queryParameters);
    return contextCreator.create(statementSupplier, tx, initialStatement, executingQuery);
}