GeoTiffConstants.java

/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2005-2008, Open Source Geospatial Foundation (OSGeo)
 *
 *    This library 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;
 *    version 2.1 of the License.
 *
 *    This library 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
 *    Lesser General Public License for more details.
 */
package org.geotools.coverage.grid.io.imageio.geotiff;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import it.geosolutions.imageio.plugins.tiff.TIFFTag;

/**
 * @author simone
 * 
 *
 * @source $URL$
 */
public final class GeoTiffConstants {
    
    final static Pattern NaturalNumberPattern = Pattern.compile("[0-9]*");
    
        public static final int TIFFTAG_NODATA = 42113;
    
	public static final short GTUserDefinedGeoKey = 32767;

	static public final String GTUserDefinedGeoKey_String = "32767".intern();

	public static final short ARRAY_ELEM_INCREMENT = 5;

	public static final String GEOTIFF_IIO_METADATA_FORMAT_NAME = it.geosolutions.imageioimpl.plugins.tiff.TIFFImageMetadata.nativeMetadataFormatName;

	public static final String GEOTIFF_IIO_ROOT_ELEMENT_NAME = GEOTIFF_IIO_METADATA_FORMAT_NAME;

	public static final int USHORT_MAX = (1 << 16) - 1;

	public static final int USHORT_MIN = 0;

	/**
	 * GTModelTypeGeoKey Key ID = 1024 Type: SHORT (code) Values: Section
	 * 6.3.1.1 Codes This GeoKey defines the general type of model Coordinate
	 * system used, and to which the raster space will be transformed: unknown,
	 * Geocentric (rarely used), Geographic, Projected Coordinate System, or
	 * user-defined. If the coordinate system is a PCS, then only the PCS code
	 * need be specified. If the coordinate system does not fit into one of the
	 * standard registered PCS'S, but it uses one of the standard projections
	 * and datums, then its should be documented as a PCS model with
	 * "user-defined" type, requiring the specification of projection
	 * parameters, etc. GeoKey requirements for User-Defined Model Type (not
	 * advisable): GTCitationGeoKey
	 */
	public static final int GTModelTypeGeoKey = 1024;

	/**
	 * GTRasterTypeGeoKey Key ID = 1025 Type = Section 6.3.1.2 codes This
	 * establishes the Raster Space coordinate system used; there are currently
	 * only two, namely RasterPixelIsPoint and RasterPixelIsArea. 
	 */
	public static final int GTRasterTypeGeoKey = 1025;

	/**
	 * 6.3.1.2 Raster Type Codes Ranges: 0 = undefined [ 1, 1023] = Raster Type
	 * Codes (GeoTIFFWritingUtilities Defined) [1024, 32766] = Reserved 32767 =
	 * user-defined [32768, 65535]= Private User 
	 */
	public static final int RasterPixelIsArea = 1;

	public static final int RasterPixelIsPoint = 2;

	/**
	 * The DOM element ID (tag) for a single TIFF Ascii value
	 */
	public static final String GEOTIFF_ASCII_TAG = "TIFFAscii".intern();

	/**
	 * The DOM element ID (tag) for a set of TIFF Ascii values
	 */
	public static final String GEOTIFF_ASCIIS_TAG = "TIFFAsciis".intern();

	/**
	 * The DOM element ID (tag) for a single TIFF double. The value is stored in
	 * an attribute named "value"
	 */
	public static final String GEOTIFF_DOUBLE_TAG = "TIFFDouble".intern();

	/**
	 * The DOM element ID (tag) for a set of TIFF Double values
	 */
	public static final String GEOTIFF_DOUBLES_TAG = "TIFFDoubles".intern();

	/**
	 * The DOM element ID (tag) for a TIFF Field
	 */
	public static final String GEOTIFF_FIELD_TAG = "TIFFField".intern();

	/**
	 * The DOM element ID (tag) for a TIFF Image File Directory
	 */
	public static final String GEOTIFF_IFD_TAG = "TIFFIFD".intern();

	/**
	 * The DOM element ID (tag) for a single TIFF Short value. The value is
	 * stored in an attribute named "value"
	 */
	public static final String GEOTIFF_SHORT_TAG = "TIFFShort".intern();

	/**
	 * The DOM element ID (tag) for a set of TIFF Short values
	 */
	public static final String GEOTIFF_SHORTS_TAG = "TIFFShorts".intern();

	/**
	 * The DOM attribute name for a TIFF Entry value (whether Short, Double, or
	 * Ascii)
	 */
	public static final String VALUE_ATTRIBUTE = "value".intern();

	/**
	 * The DOM attribute name for a TIFF Field Tag (number)
	 */
	public static final String NUMBER_ATTRIBUTE = "number".intern();

	/**
	 * The DOM attribute name for a TIFF Field Tag (name)
	 */
	public static final String NAME_ATTRIBUTE = "name";

	public static final String GEOTIFF_TAGSETS_ATT_NAME = "tagSets".intern();

	public static final int DEFAULT_GEOTIFF_VERSION = 1;

	public static final int DEFAULT_KEY_REVISION_MAJOR = 1;

	public static final int DEFAULT_KEY_REVISION_MINOR = 2;

	public static final int UNDEFINED = 0;
	
	public static TIFFTag NODATA_TAG = new TIFFTag("GDAL_NODATA", GeoTiffConstants.TIFFTAG_NODATA, 
                TIFFTag.TIFF_ASCII);

	
	 public static boolean isNumeric(String number) {
	        boolean isValid = false;
	        CharSequence inputStr = number;
	        Matcher matcher = NaturalNumberPattern.matcher(inputStr);
	        if (matcher.matches()) {
	            isValid = true;
	        }
	        return isValid;
	    }
}