Class FileSchema

java.lang.Object
dev.hardwood.schema.FileSchema
public class FileSchema extends Object
Root schema container representing the complete Parquet schema. Supports both flat schemas and nested structures (structs, lists).

  • Method Details

    • getName

      public String getName()

    • getColumns

      public List<ColumnSchema> getColumns()

    • getColumn

      public ColumnSchema getColumn(int index)

    • getColumn

      public ColumnSchema getColumn(String name)

    • getColumnCount

      public int getColumnCount()

    • getRootNode

      public SchemaNode.GroupNode getRootNode()
      Returns the hierarchical schema tree representation.

    • getField

      public SchemaNode getField(String name)
      Finds a top-level field by name in the schema tree.

    • isFlatSchema

      public boolean isFlatSchema()
      Returns true if this schema supports direct columnar access. For such schemas, enabling direct columnar access without record assembly.

      A schema supports columnar access if all top-level fields are primitives (no nested structs, lists, or maps) and no columns have repetition.

    • fromSchemaElements

      public static FileSchema fromSchemaElements(List<SchemaElement> elements)
      Reconstruct schema from Thrift SchemaElement list.

    • toString

      public String toString()
      Overrides:
      toString in class Object