com.redhat.red.offliner.alist.FoloReportArtifactListReader.java Source code

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/**
 * Copyright (C) 2015 Red Hat, Inc. (jcasey@redhat.com)
 *
 * 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.redhat.red.offliner.alist;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.redhat.red.offliner.folo.TrackedContentDTO;
import com.redhat.red.offliner.folo.TrackedContentEntryDTO;
import com.redhat.red.offliner.folo.io.FoloSerializerModule;
import com.redhat.red.offliner.model.ArtifactList;
import org.apache.commons.io.FileUtils;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * {@link ArtifactListReader} implementation that parses JSON report files from the Indy Maven repository manager's Folo
 * add-on, which does content activity tracking on a per-session basis. See:
 * <a href="https://commonjava.github.io/indy/user/addons/folo/index.html">https://commonjava.github.io/indy/user/addons/folo/index.html</a>
 * Created by jdcasey on 11/20/15.
 */
public class FoloReportArtifactListReader implements ArtifactListReader {
    @Override
    public ArtifactList readPaths(File file) throws IOException {
        String json = FileUtils.readFileToString(file);
        ObjectMapper mapper = newObjectMapper();

        TrackedContentDTO report = mapper.readValue(json, TrackedContentDTO.class);
        Set<TrackedContentEntryDTO> downloads = report.getDownloads();

        Set<String> repositories = new HashSet<>();
        List<String> paths = new ArrayList<>();
        Map<String, String> checksums = new HashMap<String, String>();
        if (downloads != null) {
            for (TrackedContentEntryDTO download : downloads) {
                String path = download.getPath();
                if (path.contains("maven-metadata.xml")) {
                    continue;
                }

                String url = download.getOriginUrl();
                if (url == null) {
                    url = download.getLocalUrl();
                }

                if (url != null) {
                    paths.add(path);
                    repositories.add(url.substring(0, url.length() - path.length()));
                    String checksum = download.getSha256();
                    if (null != checksum && !checksum.isEmpty()) {
                        checksums.put(path, checksum);
                    }
                }
            }
        }

        return new ArtifactList(paths, new ArrayList<>(repositories), checksums);
    }

    private ObjectMapper newObjectMapper() {
        ObjectMapper mapper = new ObjectMapper();
        mapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);
        mapper.configure(JsonGenerator.Feature.AUTO_CLOSE_JSON_CONTENT, true);

        mapper.enable(SerializationFeature.INDENT_OUTPUT, SerializationFeature.USE_EQUALITY_FOR_OBJECT_ID);

        mapper.enable(MapperFeature.AUTO_DETECT_FIELDS);
        //        disable( MapperFeature.AUTO_DETECT_GETTERS );

        mapper.disable(SerializationFeature.WRITE_NULL_MAP_VALUES, SerializationFeature.WRITE_EMPTY_JSON_ARRAYS);

        mapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);

        mapper.registerModule(new FoloSerializerModule());

        return mapper;
    }

    @Override
    public boolean supports(File file) {
        return file.getName().endsWith(".json");
    }
}