bchapuis opened a new pull request, #857:
URL: https://github.com/apache/incubator-baremaps/pull/857
This is an attempt at improving the data frame abstraction. The following
diagramm describes the overall architecture.
```mermaid
classDiagram
class DataColumn {
+String name()
+Type type()
}
class DataSchema {
+String name()
+List<DataColumn> columns()
+DataRow createRow()
}
class DataRow {
+DataSchema schema()
+List<?> values()
+Object get(String column)
+Object get(int index)
+void set(String column, Object value)
+void set(int index, Object value)
+DataRow with(String column, Object value)
+DataRow with(int index, Object value)
}
class DataFrame {
+DataSchema schema()
+boolean add(DataRow row)
+void clear()
+long size()
+Iterator<DataRow> iterator()
}
class DataStore {
+List<String> list()
+DataFrame get(String name)
+void add(DataFrame frame)
+void add(String name, DataFrame frame)
+void remove(String name)
}
DataStore --> DataFrame : has
DataFrame --> DataRow : has
DataFrame --> DataSchema : respects
DataRow --> DataColumn : has
DataRow --> DataSchema : respects
DataSchema --> DataColumn : creates
```
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