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

Example 46 with PropertyCursor

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

the class NodeEntity method getPropertyKeys.

@Override
public Iterable<String> getPropertyKeys() {
    KernelTransaction transaction = internalTransaction.kernelTransaction();
    List<String> keys = new ArrayList<>();
    try {
        NodeCursor nodes = transaction.ambientNodeCursor();
        PropertyCursor properties = transaction.ambientPropertyCursor();
        singleNode(transaction, nodes);
        TokenRead token = transaction.tokenRead();
        nodes.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 47 with PropertyCursor

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

the class RelationshipEntity method getProperty.

@Override
public Object getProperty(String key, Object defaultValue) {
    if (null == key) {
        throw new IllegalArgumentException("(null) property key is not allowed");
    }
    KernelTransaction transaction = internalTransaction.kernelTransaction();
    RelationshipScanCursor relationships = transaction.ambientRelationshipCursor();
    PropertyCursor properties = transaction.ambientPropertyCursor();
    int propertyKey = transaction.tokenRead().propertyKey(key);
    if (propertyKey == TokenRead.NO_TOKEN) {
        return defaultValue;
    }
    singleRelationship(transaction, relationships);
    relationships.properties(properties);
    return properties.seekProperty(propertyKey) ? properties.propertyValue().asObjectCopy() : defaultValue;
}

Example 48 with PropertyCursor

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

the class RelationshipEntity method getProperties.

@Override
public Map<String, Object> getProperties(String... keys) {
    Objects.requireNonNull(keys, "Properties keys should be not null array.");
    if (keys.length == 0) {
        return Collections.emptyMap();
    }
    KernelTransaction transaction = internalTransaction.kernelTransaction();
    int itemsToReturn = keys.length;
    TokenRead token = transaction.tokenRead();
    // Find ids, note we are betting on that the number of keys
    // is small enough not to use a set here.
    int[] propertyIds = new int[itemsToReturn];
    for (int i = 0; i < itemsToReturn; i++) {
        String key = keys[i];
        if (key == null) {
            throw new NullPointerException(String.format("Key %d was null", i));
        }
        propertyIds[i] = token.propertyKey(key);
    }
    Map<String, Object> properties = new HashMap<>(itemsToReturn);
    RelationshipScanCursor relationships = transaction.ambientRelationshipCursor();
    PropertyCursor propertyCursor = transaction.ambientPropertyCursor();
    singleRelationship(transaction, relationships);
    relationships.properties(propertyCursor);
    int propertiesToFind = itemsToReturn;
    while (propertiesToFind > 0 && propertyCursor.next()) {
        // Do a linear check if this is a property we are interested in.
        int currentKey = propertyCursor.propertyKey();
        for (int i = 0; i < itemsToReturn; i++) {
            if (propertyIds[i] == currentKey) {
                properties.put(keys[i], propertyCursor.propertyValue().asObjectCopy());
                propertiesToFind--;
                break;
            }
        }
    }
    return properties;
}