terrahs-0.5: Simple library for GIS Programs in Haskell. Source code Contents Index

TerraHS.Misc.Databases

Contents The Connection class The Databases class

Description

Module for handling a databases connection

Synopsis

class Connection c where open :: c -> IO (Ptr c) close :: Ptr c -> IO () class Connection c => Databases a c where retrieve :: Ptr c -> String -> IO a store :: Ptr c -> String -> a -> IO Bool

The Connection class

class Connection c where Source

Methods open :: c -> IO (Ptr c) Source open a connection to a database close :: Ptr c -> IO () Source close a opened connection Instances Connection TeDatabase

The Databases class

class Connection c => Databases a c where Source

Methods retrieve :: Ptr c -> String -> IO a Source load a object list from database store :: Ptr c -> String -> a -> IO Bool Source save a object list a to database Foreign.Ptr.Ptr c Instances Databases ([] ([] TeGeometry)) TeDatabase Databases ([] ([] TeGeometry)) TeDatabase Databases ([] TeGeoObject) TeDatabase Databases ([] TeGeoObject) TeDatabase Databases (TeRaster Double) TeDatabase Databases (TeRaster Double) TeDatabase

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