org.hortonmachine.gears.io.grasslegacy.map.JGrassRasterMapReader Maven / Gradle / Ivy
/*
* JGrass - Free Open Source Java GIS http://www.jgrass.org
* (C) HydroloGIS - www.hydrologis.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see
* This class makes it easier to create a reader for GRASS rasters.
*
*
* @author Andrea Antonello (www.hydrologis.com)
* @since 1.1.0
*/
public class JGrassRasterMapReader {
/**
* Builder to create {@link JGrassRasterMapReader} through the path
* of the Map.
*
* Required parameters are:
*
* - the region to read
* - the path to the map
*
*
* Optional parameters are:
*
* - the number to use internally instead of the map novalues
* - the raster map type to read (ex. {@link GrassLegacyConstans#GRASSBINARYRASTERMAP})
* - a monitor object
*
*
*/
public static class BuilderFromMapPath {
// required parameters
private final String mapPath;
private final Window readWindow;
// optional parameters
private double novalue = GrassLegacyConstans.defaultNovalue;
private String maptype = GrassLegacyConstans.GRASSBINARYRASTERMAP;
private IHMProgressMonitor monitor = new LogProgressMonitor();
/**
* Constructor for the {@link BuilderFromGeoresource} with the required parameters.
*
* @param readWindow the active region to read from.
* @param resource the {@link IGeoResource}.
*/
public BuilderFromMapPath( Window readWindow, String mapPath ) {
this.readWindow = readWindow;
this.mapPath = mapPath;
}
/**
* Sets the optional novalue.
*
* @param novalue the novalue to be used.
* @return the builder object to allow chaining.
*/
public BuilderFromMapPath novalue( double novalue ) {
this.novalue = novalue;
return this;
}
/**
* Sets the optional maptype value.
*
* @param maptype the maptype to be used.
* @return the builder object to allow chaining.
*/
public BuilderFromMapPath maptype( String maptype ) {
this.maptype = maptype;
return this;
}
/**
* Sets the optional monitor object.
*
* @param monitor the monitor to be used.
* @return the builder object to allow chaining.
*/
public BuilderFromMapPath monitor( IHMProgressMonitor monitor ) {
this.monitor = monitor;
return this;
}
/**
* Builds the {@link JGrassRasterMapReader}.
*
* @return the JGrassRasterMapReader with the supplied parameters.
*/
public JGrassRasterMapReader build() {
return new JGrassRasterMapReader(this);
}
}
/**
* Builder to create {@link JGrassRasterMapReader} through the path
* of the Location and the name of Mapset and Map.
*
* Required parameters are:
*
* - the region to read
* - the path to the Location
* - the name of the mapset
* - the name of the map
*
*
* Optional parameters are:
*
* - the number to use internally instead of the map novalues
* - the raster map type to read (ex. {@link GrassLegacyConstans#GRASSBINARYRASTERMAP})
* - a monitor object
*
*
*/
public static class BuilderFromPathAndNames {
// required parameters
private Window readWindow = null;
private String mapName = null;
private String mapsetName = null;
private String locationPath = null;
// optional parameters
private double novalue = GrassLegacyConstans.defaultNovalue;
private String maptype = GrassLegacyConstans.GRASSBINARYRASTERMAP;
private IHMProgressMonitor monitor = new LogProgressMonitor();
/**
* Constructor for the {@link BuilderFromGeoresource} with the required paraeters.
*
* @param readWindow the active region to read from.
* @param resource the {@link IGeoResource}.
*/
public BuilderFromPathAndNames( Window readWindow, String mapName, String mapsetName, String locationPath ) {
this.readWindow = readWindow;
this.mapName = mapName;
this.mapsetName = mapsetName;
this.locationPath = locationPath;
}
/**
* Sets the optional novalue.
*
* @param novalue the novalue to be used.
* @return the builder object to allow chaining.
*/
public BuilderFromPathAndNames novalue( double novalue ) {
this.novalue = novalue;
return this;
}
/**
* Sets the optional maptype value.
*
* @param maptype the maptype to be used.
* @return the builder object to allow chaining.
*/
public BuilderFromPathAndNames maptype( String maptype ) {
this.maptype = maptype;
return this;
}
/**
* Sets the optional monitor object.
*
* @param monitor the monitor to be used.
* @return the builder object to allow chaining.
*/
public BuilderFromPathAndNames monitor( IHMProgressMonitor monitor ) {
this.monitor = monitor;
return this;
}
/**
* Builds the {@link JGrassRasterMapReader}.
*
* @return the JGrassRasterMapReader with the supplied parameters.
*/
public JGrassRasterMapReader build() {
return new JGrassRasterMapReader(this);
}
}
private MapReader reader = null;
private IHMProgressMonitor monitor = null;
private String mapName = null;
private String mapsetName = null;
private String locationPath = null;
private boolean hasMoreData = false;
private String mapPath;
private String fullMapPath = null;
/**
* Creates a jgrass raster map reader through a builder.
*
* @param builder the builder.
*/
private JGrassRasterMapReader( BuilderFromPathAndNames builder ) {
this.monitor = builder.monitor;
this.mapName = builder.mapName;
this.mapsetName = builder.mapsetName;
this.locationPath = builder.locationPath;
reader = MapIOFactory.createGrassRasterMapReader(builder.maptype);
reader.setParameter("novalue", (new Double(builder.novalue)));
reader.setDataWindow(builder.readWindow);
reader.setOutputDataObject(new double[0][0]);
fullMapPath = locationPath + File.separator + mapsetName + File.separator + GrassLegacyConstans.CELL + File.separator
+ mapName;
}
/**
* Creates a jgrass raster map reader through a builder.
*
* @param builder the builder.
*/
private JGrassRasterMapReader( BuilderFromMapPath builder ) {
this.monitor = builder.monitor;
this.mapPath = builder.mapPath;
reader = MapIOFactory.createGrassRasterMapReader(builder.maptype);
reader.setParameter("novalue", (new Double(builder.novalue)));
reader.setDataWindow(builder.readWindow);
reader.setOutputDataObject(new double[0][0]);
fullMapPath = mapPath;
}
/**
*
* Opens the raster map and does some first checking
*
*
* @return true if everything went alright
*/
public boolean open() {
boolean ok;
if (mapPath != null) {
ok = reader.open(mapPath);
} else if (locationPath != null && mapsetName != null && mapName != null) {
ok = reader.open(mapName, locationPath, mapsetName);
} else {
return false;
}
return ok;
}
/**
* @return true if more data are available
*/
public boolean hasMoreData() throws IOException {
try {
if (reader.hasMoreData(monitor)) {
hasMoreData = true;
}
return hasMoreData;
} catch (Exception e) {
e.printStackTrace();
throw new IOException(e.getLocalizedMessage());
}
}
/**
* @return a next unit of data from the reader
*/
public RasterData getNextData() {
if (hasMoreData) {
return new JGrassRasterData((double[][]) reader.getNextData());
}
return null;
}
/**
* This assures a range only after the data were read at least once
*
* @return the range
*/
public double[] getRange() {
return reader.getRange();
}
/**
* @return the reader that takes care of the raster reading.
*/
public MapReader getReader() {
return reader;
}
/**
* close the reader
*/
public void close() {
if (reader != null) {
reader.close();
}
}
public String getFullMapPath() {
return fullMapPath;
}
}