Examples with RelationshipScanCursor org.neo4j.internal.kernel.api.RelationshipScanCursor used on opensource projects

Example 26 with RelationshipScanCursor

use of org.neo4j.internal.kernel.api.RelationshipScanCursor in project neo4j by neo4j.

the class RelationshipEntity method hasProperty.

@Override
public boolean hasProperty(String key) {
    if (null == key) {
        return false;
    }
    KernelTransaction transaction = internalTransaction.kernelTransaction();
    int propertyKey = transaction.tokenRead().propertyKey(key);
    if (propertyKey == TokenRead.NO_TOKEN) {
        return false;
    }
    RelationshipScanCursor relationships = transaction.ambientRelationshipCursor();
    PropertyCursor properties = transaction.ambientPropertyCursor();
    singleRelationship(transaction, relationships);
    relationships.properties(properties);
    return properties.seekProperty(propertyKey);
}

Example 27 with RelationshipScanCursor

use of org.neo4j.internal.kernel.api.RelationshipScanCursor in project neo4j by neo4j.

the class RelationshipEntity method getPropertyKeys.

@Override
public Iterable<String> getPropertyKeys() {
    KernelTransaction transaction = internalTransaction.kernelTransaction();
    List<String> keys = new ArrayList<>();
    try {
        RelationshipScanCursor relationships = transaction.ambientRelationshipCursor();
        PropertyCursor properties = transaction.ambientPropertyCursor();
        singleRelationship(transaction, relationships);
        TokenRead token = transaction.tokenRead();
        relationships.properties(properties);
        while (properties.next()) {
            keys.add(token.propertyKeyName(properties.propertyKey()));
        }
    } catch (PropertyKeyIdNotFoundKernelException e) {
        throw new IllegalStateException("Property key retrieved through kernel API should exist.", e);
    }
    return keys;
}

Example 28 with RelationshipScanCursor

use of org.neo4j.internal.kernel.api.RelationshipScanCursor in project neo4j by neo4j.

the class RelationshipEntity method getAllProperties.

public Map<String, Object> getAllProperties(PropertyCursor propertyCursor) {
    KernelTransaction transaction = internalTransaction.kernelTransaction();
    Map<String, Object> properties = new HashMap<>();
    try {
        RelationshipScanCursor relationships = transaction.ambientRelationshipCursor();
        TokenRead token = transaction.tokenRead();
        singleRelationship(transaction, relationships);
        relationships.properties(propertyCursor);
        while (propertyCursor.next()) {
            properties.put(token.propertyKeyName(propertyCursor.propertyKey()), propertyCursor.propertyValue().asObjectCopy());
        }
    } catch (PropertyKeyIdNotFoundKernelException e) {
        throw new IllegalStateException("Property key retrieved through kernel API should exist.", e);
    }
    return properties;
}

Example 29 with RelationshipScanCursor

use of org.neo4j.internal.kernel.api.RelationshipScanCursor in project neo4j by neo4j.

the class RelationshipEntity method getProperty.

@Override
public Object getProperty(String key) {
    if (null == key) {
        throw new IllegalArgumentException("(null) property key is not allowed");
    }
    KernelTransaction transaction = internalTransaction.kernelTransaction();
    int propertyKey = transaction.tokenRead().propertyKey(key);
    if (propertyKey == TokenRead.NO_TOKEN) {
        throw new NotFoundException(format("No such property, '%s'.", key));
    }
    RelationshipScanCursor relationships = transaction.ambientRelationshipCursor();
    PropertyCursor properties = transaction.ambientPropertyCursor();
    singleRelationship(transaction, relationships);
    relationships.properties(properties);
    if (!properties.seekProperty(propertyKey)) {
        throw new NotFoundException(format("No such property, '%s'.", key));
    }
    return properties.propertyValue().asObjectCopy();
}

Example 30 with RelationshipScanCursor

use of org.neo4j.internal.kernel.api.RelationshipScanCursor in project neo4j by neo4j.

the class RelationshipTransactionStateTestBase method shouldScanRelationshipInTransaction.

@Test
void shouldScanRelationshipInTransaction() throws Exception {
    final int nRelationshipsInStore = 10;
    int type;
    long n1, n2;
    try (KernelTransaction tx = beginTransaction()) {
        n1 = tx.dataWrite().nodeCreate();
        n2 = tx.dataWrite().nodeCreate();
        // setup some in store relationships
        type = tx.tokenWrite().relationshipTypeGetOrCreateForName("R");
        relateNTimes(nRelationshipsInStore, type, n1, n2, tx);
        tx.commit();
    }
    try (KernelTransaction tx = beginTransaction()) {
        long r = tx.dataWrite().relationshipCreate(n1, type, n2);
        try (RelationshipScanCursor relationship = tx.cursors().allocateRelationshipScanCursor(NULL)) {
            tx.dataRead().allRelationshipsScan(relationship);
            assertCountRelationships(relationship, nRelationshipsInStore + 1, n1, type, n2);
        }
        tx.commit();
    }
}