ch.so.agi.gretl.steps

Class PostgisRasterExportStep

java.lang.Object

ch.so.agi.gretl.steps.PostgisRasterExportStep

public class PostgisRasterExportStep
extends java.lang.Object

Exports raster data from a PostgreSQL database into a raster file by executing a sql query. The sql query must return only one record. Use e.g. ST_Union().

Constructor Summary

Constructors

Constructor and Description
PostgisRasterExportStep()

Method Summary

Modifier and Type	Method and Description
void	execute(Connector database, java.io.File sqlFile, java.io.File dataFile, java.util.Map<java.lang.String,java.lang.String> params) Executes the sql query from a file in the specified database.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PostgisRasterExportStep

public PostgisRasterExportStep()

Method Detail

execute

public void execute(Connector database,
                    java.io.File sqlFile,
                    java.io.File dataFile,
                    java.util.Map<java.lang.String,java.lang.String> params)
             throws java.lang.Exception

Executes the sql query from a file in the specified database. It will use the first found _bytea_ column as raster data column.

Parameters:

database - Database properties to generate database connection.

sqlFile - File which contain query.

dataFile - File where raster data is written to.

params - Map with key/value pairs. Will be used to replace parameters in the sql query.

Throws:

java.lang.Exception - If file is missing, no connection to database, could not read file or problems while executing sql query.