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using Npgsql.Internal.Postgres;

namespace Npgsql.PostgresTypes;

/// <summary>

/// Represents a PostgreSQL array data type, which can hold several multiple values in a single column.

/// </summary>

/// <remarks>

/// See https://www.postgresql.org/docs/current/static/arrays.html.

/// </remarks>

public class PostgresArrayType : PostgresType

{

/// <summary>

/// The PostgreSQL data type of the element contained within this array.

/// </summary>

public PostgresType Element { get; }

/// <summary>

/// Constructs a representation of a PostgreSQL array data type.

/// </summary>

protected internal PostgresArrayType(string ns, string name, uint oid, PostgresType elementPostgresType)

: base(ns, name, oid)

{

Element = elementPostgresType;

Element.Array = this;

}

/// <summary>

/// Constructs a representation of a PostgreSQL array data type.

/// </summary>

internal PostgresArrayType(DataTypeName dataTypeName, Oid oid, PostgresType elementPostgresType)

: base(dataTypeName, oid)

{

Element = elementPostgresType;

Element.Array = this;

}

// PostgreSQL array types have an underscore-prefixed name (_text), but we

// want to return the public text[] instead

/// <inheritdoc/>

internal override string GetPartialNameWithFacets(int typeModifier)

=> Element.GetPartialNameWithFacets(typeModifier) + "[]";

internal override PostgresFacets GetFacets(int typeModifier)

=> Element.GetFacets(typeModifier);

}