Examples with InternalIdStrategy org.neo4j.ogm.id.InternalIdStrategy used on opensource projects

Example 1 with InternalIdStrategy

use of org.neo4j.ogm.id.InternalIdStrategy in project neo4j-ogm by neo4j.

the class ClassInfo method getOrComputeIdentityField.

private Optional<FieldInfo> getOrComputeIdentityField() {
    Optional<FieldInfo> result = this.identityField;
    if (result == null) {
        synchronized (this) {
            result = this.identityField;
            if (result == null) {
                // Didn't want to add yet another method related to determining the identy field
                // so the actual resolving of the field inside the Double-checked locking here
                // has been inlined.
                Collection<FieldInfo> identityFields = getFieldInfos(FieldInfo::isInternalIdentity);
                if (identityFields.size() == 1) {
                    this.identityField = Optional.of(identityFields.iterator().next());
                } else if (identityFields.size() > 1) {
                    throw new MetadataException("Expected exactly one internal identity field (@Id with " + "InternalIdStrategy), found " + identityFields.size() + " " + identityFields);
                } else {
                    this.identityField = fieldsInfo.fields().stream().filter(f -> "id".equals(f.getName())).filter(f -> "java.lang.Long".equals(f.getTypeDescriptor())).findFirst();
                }
                result = this.identityField;
            }
        }
    }
    return result;
}