/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2014, 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.util;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.media.jai.Interpolation;
import javax.media.jai.InterpolationBicubic;
import javax.media.jai.InterpolationBicubic2;
import javax.media.jai.InterpolationBilinear;
import javax.media.jai.InterpolationNearest;
import org.geotools.factory.Hints;
/**
* Convert String to Interpolation classes.
*
* @author Simone Giannecchini, GeoSolutions
* @since 12.0
* @version 11.0
*
* @source $URL$
*/
public class InterpolationConverterFactory implements ConverterFactory {
private static final Logger LOGGER = org.geotools.util.logging.Logging
.getLogger(InterpolationConverterFactory.class);
private final static InterpolationConverter THE_INTERPOLATION_CONVERTER = new InterpolationConverter();
/**
* Delegates to {@link ConvertUtils#lookup(java.lang.Class)} to create a converter instance.
*
* @see ConverterFactory#createConverter(Class, Class, Hints).
*/
public Converter createConverter(Class<?> source, Class<?> target, Hints hints) {
if (source == null || target == null || !source.equals(String.class)) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine("InterpolationConverterFactory can be applied from Strings to Interpolation only.");
}
return null; // only do strings
}
if (Interpolation.class.isAssignableFrom(target)) {
return THE_INTERPOLATION_CONVERTER;
} else {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine("InterpolationConverterFactory can be applied from Strings to Interpolation only.");
}
}
return null;
}
// some additional converters
/**
* converts a string to an Interpolation Object.
*/
static class InterpolationConverter implements Converter {
@SuppressWarnings("unchecked")
public <T> T convert(Object source, Class<T> target) throws Exception {
// checks
if (source == null) {
return null;
}
if (target == null || !Interpolation.class.isAssignableFrom(target)) {
return null;
}
// convert
String input = (String) source;
input = input.trim();
final int idx = input.indexOf('(');
// get the interpolation key
final String key = idx == -1 ? input.toUpperCase() : input.substring(0, idx)
.toUpperCase();
// get a parser
InterpolationParser parser = InterpolationParser.valueOf(key);
if (parser == null) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine("InterpolationConverterFactory can be applied to Strings like interpolation????(XXX). "
+ source + " is invalid!");
}
}
// get the interpolation
Interpolation output = parser.parse(input);
if (output == null && LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine("Unable to parse " + input);
}
return (T) output;
}
}
/**
*
* @author Simone Giannecchini, GeoSolutions
*
*/
enum InterpolationParser {
INTERPOLATIONNEAREST {
/** INTERPOLATION_NEAREST */
private final InterpolationNearest INTERPOLATION_NEAREST = new InterpolationNearest();
@Override
Interpolation parse(String interpolationString) {
if (interpolationString.equals("InterpolationNearest")) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine("Parsed InterpolationNearest");
}
return INTERPOLATION_NEAREST;
}
// unable to parse
return null;
}
},
INTERPOLATIONBILINEAR {
/** INTERPOLATION_BILINEAR */
private final InterpolationBilinear INTERPOLATION_BILINEAR = new InterpolationBilinear();
private final Pattern INTERPOLATION_BILINEAR_PATTERN_MATCH = Pattern
.compile("InterpolationBilinear\\(\\d+\\)");
private final Pattern INTERPOLATION_BILINEAR_PATTERN_EXTRACT = Pattern.compile("\\d+");
@Override
Interpolation parse(String interpolationString) {
// most common case, simple bilinear
if (interpolationString.equals("InterpolationBilinear")) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine("Parsing InterpolationBilinear=" + interpolationString);
}
return INTERPOLATION_BILINEAR;
}
// more complex cases
// match the string
Matcher matcher = INTERPOLATION_BILINEAR_PATTERN_MATCH.matcher(interpolationString);
if (matcher.matches()) {
// extract subsample bits
matcher = INTERPOLATION_BILINEAR_PATTERN_EXTRACT.matcher(interpolationString);
matcher.matches();
if (matcher.find()) {
// get the match and parse it
final String subsBitsString = matcher.group();
try {
return new InterpolationBilinear(Integer.parseInt(subsBitsString));
} catch (Exception e) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE, e.getLocalizedMessage(), e);
}
}
}
}
// unable to parse
return null;
}
},
INTERPOLATIONBICUBIC {
private final Pattern INTERPOLATION_BICUBIC_PATTERN_MATCH = Pattern
.compile("InterpolationBicubic\\(\\d+\\)");
private final Pattern INTERPOLATION_BICUBIC_PATTERN_EXTRACT = Pattern.compile("\\d+");
@Override
Interpolation parse(String interpolationString) {
// match the string
Matcher matcher = INTERPOLATION_BICUBIC_PATTERN_MATCH.matcher(interpolationString);
if (matcher.matches()) {
// extract subsample bits
matcher = INTERPOLATION_BICUBIC_PATTERN_EXTRACT.matcher(interpolationString);
matcher.matches();
if (matcher.find()) {
// get the match and parse it
final String subsBitsString = matcher.group();
try {
return new InterpolationBicubic(Integer.parseInt(subsBitsString));
} catch (Exception e) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE, e.getLocalizedMessage(), e);
}
}
}
}
// unable to parse
return null;
}
},
INTERPOLATIONBICUBIC2 {
private final Pattern INTERPOLATION_BICUBIC2_PATTERN_MATCH = Pattern
.compile("InterpolationBicubic2\\(\\d+\\)");
private final Pattern INTERPOLATION_BICUBIC2_PATTERN_EXTRACT = Pattern.compile("\\d+");
@Override
Interpolation parse(String interpolationString) {
// match the string
Matcher matcher = INTERPOLATION_BICUBIC2_PATTERN_MATCH.matcher(interpolationString);
if (matcher.matches()) {
// extract subsample bits
matcher = INTERPOLATION_BICUBIC2_PATTERN_EXTRACT.matcher(interpolationString);
matcher.matches();
if (matcher.find()) {
// get the match and parse it
final String subsBitsString = matcher.group();
try {
return new InterpolationBicubic2(Integer.parseInt(subsBitsString));
} catch (Exception e) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE, e.getLocalizedMessage(), e);
}
}
}
}
// unable to parse
return null;
}
};
abstract Interpolation parse(String interpolationString);
}
}