com.b2international.snowowl.snomed.importer.rf2.util.RF2ReleaseRefSetFileCollector.java Source code

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Here is the source code for com.b2international.snowowl.snomed.importer.rf2.util.RF2ReleaseRefSetFileCollector.java

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/*
 * Copyright 2011-2018 B2i Healthcare Pte Ltd, http://b2i.sg
 * 
 * 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 com.b2international.snowowl.snomed.importer.rf2.util;

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

import com.b2international.commons.ZipURLHandler;
import com.b2international.snowowl.snomed.importer.net4j.ImportConfiguration;
import com.b2international.snowowl.snomed.importer.net4j.ImportConfiguration.ImportSourceKind;
import com.b2international.snowowl.snomed.importer.release.ReleaseFileSet;
import com.google.common.collect.Sets;

/**
 * Based on the import configuration this helper class collects all the available refset files which have to be imported.
 * 
 */
public class RF2ReleaseRefSetFileCollector {

    public static Set<URL> collectUrlFromRelease(final ImportConfiguration configuration) {

        final ReleaseFileSet releaseFileSet = configuration.getReleaseFileSet();

        if (releaseFileSet == null) {
            return Collections.<URL>emptySet();
        }

        final Set<URL> collectedUrlSet = Sets.newHashSet();

        if (configuration.getSourceKind().equals(ImportSourceKind.ARCHIVE)) {

            final List<String> refSetsRelativePaths = releaseFileSet.getRefSetPaths();
            final String relativeRoot = releaseFileSet.getRelativeRoot();

            for (final String refSetPath : refSetsRelativePaths) {
                Set<URL> urlsFromZip = parseZip(configuration.getArchiveFile(), relativeRoot, refSetPath);
                collectedUrlSet.addAll(urlsFromZip.stream()
                        .filter(url -> !refSetPath.equals("Terminology") || url.getFile().contains("sct2_sRefset"))
                        .collect(Collectors.toSet()));
            }

        }

        return collectedUrlSet;
    }

    private static Set<URL> parseZip(final File archiveFile, final String relativeRoot, final String relativePath) {
        final Set<URL> filesToImport = new HashSet<URL>();

        try {

            final ZipFile zipFile = new ZipFile(archiveFile);
            final Enumeration<? extends ZipEntry> entries = zipFile.entries();

            while (entries.hasMoreElements()) {

                final ZipEntry nextElement = entries.nextElement();
                if (!nextElement.isDirectory()) {

                    final String name = nextElement.getName();

                    if (name.indexOf(relativeRoot + relativePath) > -1) {
                        final URL url = ZipURLHandler.createURL(archiveFile, name);
                        filesToImport.add(url);
                    }
                }
            }

            zipFile.close();

        } catch (final IOException e) {
            throw new RuntimeException(e);
        }

        return filesToImport;
    }
}