net.erdfelt.android.sdkfido.sdks.SourceOriginsLoader.java Source code

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Here is the source code for net.erdfelt.android.sdkfido.sdks.SourceOriginsLoader.java

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/*******************************************************************************
 *    Copyright 2012 - Joakim Erdfelt
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 *******************************************************************************/
package net.erdfelt.android.sdkfido.sdks;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.apache.commons.beanutils.ConvertUtils;
import org.apache.commons.beanutils.Converter;
import org.apache.commons.configuration.ConversionException;
import org.apache.commons.digester.Digester;
import org.apache.commons.digester.annotations.DigesterLoader;
import org.apache.commons.digester.annotations.DigesterLoaderBuilder;
import org.xml.sax.SAXException;

public class SourceOriginsLoader {
    private static final Logger LOG = Logger.getLogger(SourceOriginsLoader.class.getName());

    public static SourceOrigins load() throws IOException {
        String resourcePath = "sdks-ng.xml";
        URL url = SourceOriginsLoader.class.getResource(resourcePath);
        if (url == null) {
            throw new FileNotFoundException("Unable to find resource: " + resourcePath);
        }

        return load(url);
    }

    public static SourceOrigins load(File file) throws IOException {
        if (!file.exists()) {
            throw new FileNotFoundException("Unable to find file: " + file);
        }
        return load(file.toURI().toURL());
    }

    public static SourceOrigins load(URL url) throws IOException {
        try {
            ConvertUtils.register(new VersionConverter(), Version.class);
            DigesterLoader loader = DigesterLoaderBuilder.byDefaultFactories();
            Digester digester = loader.createDigester(SourceOrigins.class);
            SourceOrigins origins = (SourceOrigins) digester.parse(url);
            origins.normalize();
            return origins;
        } catch (SAXException e) {
            LOG.log(Level.WARNING, "Unable to load/parse url: " + url, e);
            throw new IOException("Unable to load/parse url: " + url, e);
        }
    }

    public static class VersionConverter implements Converter {
        @SuppressWarnings("rawtypes")
        @Override
        public Object convert(Class type, Object value) throws ConversionException {
            if (value == null) {
                throw new ConversionException("No value specified");
            }

            if (value instanceof Version) {
                return (value);
            }

            Version version = null;
            if (value instanceof String) {
                try {
                    version = new Version((String) value);
                } catch (Throwable e) {
                    throw new ConversionException(e);
                }
            } else {
                throw new ConversionException("Input value not of correct type");
            }

            return version;
        }
    }
}