/*
* Copyright (C) 2014 Camptocamp
*
* This file is part of MapFish Print
*
* MapFish Print is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* MapFish Print 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 General Public License
* along with MapFish Print. If not, see <http://www.gnu.org/licenses/>.
*/
package org.mapfish.print.map.style;
import com.google.common.base.Optional;
import com.google.common.collect.Lists;
import org.geotools.factory.CommonFactoryFinder;
import org.geotools.styling.SLDTransformer;
import org.geotools.styling.Style;
import org.geotools.styling.StyleFactory;
import org.geotools.styling.StyledLayerDescriptor;
import org.geotools.styling.UserLayer;
import org.mapfish.print.ExceptionUtils;
import org.mapfish.print.attribute.map.MapfishMapContext;
import org.mapfish.print.config.Configuration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.client.ClientHttpRequestFactory;
import java.util.List;
import javax.annotation.Nonnull;
/**
* Parse a style using all the available {@link StyleParserPlugin} registered with the spring application context.
*
* @author Jesse on 3/26/14.
*/
public final class StyleParser {
private static final Logger LOGGER = LoggerFactory.getLogger(StyleParser.class);
@Autowired
private List<StyleParserPlugin> plugins = Lists.newArrayList();
/**
* Load style using one of the plugins or return Optional.absent().
* @param configuration the configuration for the current request.
* @param clientHttpRequestFactory a factory for making http requests
* @param styleString the style to load.
* @param mapContext information about the map projection, bounds, size, etc...
*/
public Optional<? extends Style> loadStyle(final Configuration configuration,
@Nonnull final ClientHttpRequestFactory clientHttpRequestFactory,
final String styleString,
final MapfishMapContext mapContext) {
if (styleString != null) {
for (StyleParserPlugin plugin : this.plugins) {
try {
Optional<? extends Style> style = plugin.parseStyle(configuration, clientHttpRequestFactory, styleString, mapContext);
if (style.isPresent()) {
if (LOGGER.isDebugEnabled()) {
try {
final SLDTransformer transformer = new SLDTransformer();
final StyleFactory styleFactory = CommonFactoryFinder.getStyleFactory();
final UserLayer userLayer = styleFactory.createUserLayer();
userLayer.addUserStyle(style.get());
final StyledLayerDescriptor sld = styleFactory.createStyledLayerDescriptor();
sld.addStyledLayer(userLayer);
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Loaded style from: \n\n '" + styleString + "': \n\n" + transformer.transform(sld));
}
} catch (Exception e) {
LOGGER.debug("Loaded style from: \n\n '" + styleString + "' \n\n<Unable to transform it to xml>: " + e, e);
}
}
return style;
}
} catch (Throwable t) {
throw ExceptionUtils.getRuntimeException(t);
}
}
}
return Optional.absent();
}
}