/*
* 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.Function;
import com.google.common.base.Optional;
import com.google.common.io.ByteStreams;
import com.google.common.io.Closer;
import org.geotools.styling.Style;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.ClientHttpResponse;
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
/**
* Utilities for creating parser plugins.
*
* @author Jesse on 7/30/2014.
*/
public final class ParserPluginUtils {
private ParserPluginUtils() {
// utility class
}
/**
* Load data using {@link org.mapfish.print.config.Configuration#loadFile(String)} and using http. If data is able to be loaded
* it will be passed to the loadFunction to be turned into a style.
*
* @param clientHttpRequestFactory the factory to use for http requests
* @param styleRef the uri/file/else for attempting to load a style
* @param loadFunction the function to call when data has been loaded.
*/
public static Optional<Style> loadStyleAsURI(final ClientHttpRequestFactory clientHttpRequestFactory, final String styleRef,
final Function<byte[], Optional<Style>> loadFunction) throws IOException {
HttpStatus statusCode;
final byte[] input;
Closer closer = Closer.create();
try {
URI uri;
try {
uri = new URI(styleRef);
} catch (URISyntaxException e) {
uri = new File(styleRef).toURI();
}
final ClientHttpRequest request = clientHttpRequestFactory.createRequest(uri, HttpMethod.GET);
final ClientHttpResponse response = closer.register(request.execute());
statusCode = response.getStatusCode();
input = ByteStreams.toByteArray(response.getBody());
} catch (Exception e) {
return Optional.absent();
} finally {
closer.close();
}
if (statusCode == HttpStatus.OK) {
return loadFunction.apply(input);
} else {
return Optional.absent();
}
}
}