/// <summary>
/// OBS this implementation can only provide values for properties of type <seealso cref="string"/>.
/// Other property types will still be counted as distinct, but {@code client} won't receive <seealso cref="Value"/>
/// instances for those. </summary>
/// <param name="client"> <seealso cref="IndexProgressor.NodeValueClient"/> to get initialized with this progression. </param>
/// <param name="propertyAccessor"> <seealso cref="NodePropertyAccessor"/> for reading property values. </param>
/// <param name="needsValues"> whether or not to load string values. </param>
public override void DistinctValues(Org.Neo4j.Storageengine.Api.schema.IndexProgressor_NodeValueClient client, NodePropertyAccessor propertyAccessor, bool needsValues)
{
try
{
IndexQuery[] noQueries = new IndexQuery[0];
BridgingIndexProgressor multiProgressor = new BridgingIndexProgressor(client, _descriptor.schema().PropertyIds);
Fields fields = MultiFields.getFields(IndexSearcher.IndexReader);
foreach (ValueEncoding valueEncoding in ValueEncoding.values())
{
Terms terms = fields.terms(valueEncoding.key());
if (terms != null)
{
System.Func <BytesRef, Value> valueMaterializer = valueEncoding == ValueEncoding.String && needsValues ? term => Values.stringValue(term.utf8ToString()) : term => null;
TermsEnum termsIterator = terms.GetEnumerator();
if (valueEncoding == ValueEncoding.Number)
{
termsIterator = NumericUtils.filterPrefixCodedLongs(termsIterator);
}
multiProgressor.Initialize(_descriptor, new LuceneDistinctValuesProgressor(termsIterator, client, valueMaterializer), noQueries, IndexOrder.NONE, needsValues);
}
}
client.Initialize(_descriptor, multiProgressor, noQueries, IndexOrder.NONE, needsValues);
}
catch (IOException e)
{
throw new UncheckedIOException(e);
}
}
protected bool Equals(Attachment other)
{
var firstPart = Equals(Uri, other.Uri) && ValueEncoding.Equals(other.ValueEncoding);
return(Data == null
? firstPart
: firstPart && Data.SequenceEqual(other.Data));
}
public override int GetHashCode()
{
unchecked
{
var hashCode = Uri?.GetHashCode() ?? 0;
hashCode = (hashCode * 397) ^ (CollectionHelpers.GetHashCode(Data));
hashCode = (hashCode * 397) ^ (ValueEncoding?.GetHashCode() ?? 0);
return(hashCode);
}
}
public override string?this[string option]
{
get
{
if (Protocol == Protocol.Ice1)
{
return(option switch
{
"value" => Value.Length > 0 ? Convert.ToBase64String(Value.Span) : null,
"value-encoding" => ValueEncoding.ToString(),
_ => null,
});
internal virtual Field GetFieldWithValue(int propertyNumber, Value value)
{
ValueEncoding encoding = ValueEncoding.forValue(value);
int reuseId = propertyNumber * ValueEncoding.values().length + encoding.ordinal();
string key = encoding.key(propertyNumber);
Field reusableField = ReusableValueFields[reuseId];
if (reusableField == null)
{
reusableField = encoding.encodeField(key, value);
ReusableValueFields[reuseId] = reusableField;
}
else
{
encoding.setFieldValue(value, reusableField);
}
return(reusableField);
}
public override string ToString()
{
return(Data == null
? string.Empty
: ValueEncoding.GetString(Data));
}
private NetpbmHeader <TPixelFormat> ReadPGMOrPPMHeader <TPixelFormat>(Stream stream, ValueEncoding valueEncoding, IImageFactory <TPixelFormat> imageFactory, params Component[] components)
{
int width;
var widthBytes = SkipWhitespaceAndReadUntilNextWhitespaceByte(stream, true);
var widthString = GetUsAsciiString(widthBytes);
if (!TryParseIntInvariant(widthString, out width))
{
throw new InvalidDataException(string.Format("failed to parse width '{0}'", widthString));
}
int height;
var heightBytes = SkipWhitespaceAndReadUntilNextWhitespaceByte(stream, true);
var heightString = GetUsAsciiString(heightBytes);
if (!TryParseIntInvariant(heightString, out height))
{
throw new InvalidDataException(string.Format("failed to parse height '{0}'", heightString));
}
var highestValueBytes = SkipWhitespaceAndReadUntilNextWhitespaceByte(stream, true);
var highestValueString = GetUsAsciiString(highestValueBytes);
TPixelFormat highestValue = imageFactory.ParseHighestComponentValue(highestValueString);
// final byte of whitespace has been discarded by SkipWhitespaceAndReadUntilNextWhitespaceByte
return(new NetpbmHeader <TPixelFormat>(
(components.Length == 1)
? ((valueEncoding == ValueEncoding.Binary) ? ImageType.PGM : ImageType.PlainPGM)
: ((valueEncoding == ValueEncoding.Binary) ? ImageType.PPM : ImageType.PlainPPM),
width,
height,
imageFactory.GetNumberOfBytesPerPixelComponent(highestValue),
components,
highestValue
));
//return imageFactory.MakeImage(width, height, highestValue, components, rows);
}
private NetpbmHeader <TPixelFormat> ReadPBMHeader <TPixelFormat>(Stream stream, ValueEncoding valueEncoding, IImageFactory <TPixelFormat> imageFactory)
{
int width;
var widthBytes = SkipWhitespaceAndReadUntilNextWhitespaceByte(stream, true);
var widthString = GetUsAsciiString(widthBytes);
if (!TryParseIntInvariant(widthString, out width))
{
throw new InvalidDataException(string.Format("failed to parse width '{0}'", widthString));
}
int height;
var heightBytes = SkipWhitespaceAndReadUntilNextWhitespaceByte(stream, true);
var heightString = GetUsAsciiString(heightBytes);
if (!TryParseIntInvariant(heightString, out height))
{
throw new InvalidDataException(string.Format("failed to parse height '{0}'", heightString));
}
// final byte of whitespace has been discarded by SkipWhitespaceAndReadUntilNextWhitespaceByte
return(new NetpbmHeader <TPixelFormat>(
(valueEncoding == ValueEncoding.Plain) ? ImageType.PlainPBM : ImageType.PBM,
width,
height,
1,
new[] { Component.Black },
imageFactory.BitmapOnPixelComponentValue
));
}