org.geotools.process

Interface RenderingProcess

All Superinterfaces:

Process

public interface RenderingProcess
extends Process

An interface to be implemented by processes meant to be integrated as feature collection/grid coverage transformations in a rendering chain.

The method provide information about how the data is altered so that the renderer can query the appropriate part of the input data that will feed the process

Author:

Andrea Aime - GeoSolutions

Method Summary

Modifier and Type	Method and Description
default GeneralParameterValue[]	customizeReadParams(Map<String,Object> input, GridCoverageReader reader, GeneralParameterValue[] params) Allows the transformation to customize the read parameters (asl
GridGeometry	invertGridGeometry(Map<String,Object> input, Query targetQuery, GridGeometry targetGridGeometry) Given a target query and a target grid geometry returns the grid geometry to be used to read the input data of the process involved in rendering.
Query	invertQuery(Map<String,Object> input, Query targetQuery, GridGeometry gridGeometry) Given a target query and a target grid geometry returns the query to be used to read the input data of the process involved in rendering.

Methods inherited from interface Process

execute

Method Detail

invertQuery

Query invertQuery(Map<String,Object> input,
                  Query targetQuery,
                  GridGeometry gridGeometry)
           throws ProcessException

Given a target query and a target grid geometry returns the query to be used to read the input data of the process involved in rendering. This method will be called only if the input data is a feature collection.

Parameters:

input - The process inputs

targetQuery - The query against the transformation outputs

gridGeometry - The grid geometry desired for the outputs of the transformation

Returns:

The transformed query, or null if no inversion is possible/meaningful

Throws:

ProcessException

invertGridGeometry

GridGeometry invertGridGeometry(Map<String,Object> input,
                                Query targetQuery,
                                GridGeometry targetGridGeometry)
                         throws ProcessException

Given a target query and a target grid geometry returns the grid geometry to be used to read the input data of the process involved in rendering. This method will be called only if the input data is a grid coverage or a grid coverage reader

Parameters:

input - The process inputs

targetQuery - The query against the transformation outputs

targetGridGeometry - The grid geometry desired for the outputs of the transformation

Returns:

The transformed query, or null if no inversion is possible/meaningful

Throws:

ProcessException

customizeReadParams

default GeneralParameterValue[] customizeReadParams(Map<String,Object> input,
                                                    GridCoverageReader reader,
                                                    GeneralParameterValue[] params)

Allows the transformation to customize the read parameters (asl

Parameters:

input - The process inputs

reader - The reader involved

params - The current parameters

Returns:

The original parameters, or a customized version of them