[31007] | 1 | package org.hathitrust.extractedfeatures;
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| 2 |
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[31045] | 3 | import java.io.IOException;
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[31007] | 4 | import java.util.ArrayList;
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| 5 | import java.util.Iterator;
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| 6 | import org.apache.spark.api.java.function.FlatMapFunction;
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| 7 | import org.apache.spark.util.DoubleAccumulator;
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| 8 | import org.json.JSONArray;
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| 9 | import org.json.JSONObject;
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| 10 |
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| 11 | /*
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| 12 | class PagedJSON implements Function<String, Boolean> {
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| 13 |
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| 14 | private static final long serialVersionUID = 1L;
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| 15 |
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| 16 | public Boolean call(String s) { return s.contains("a"); }
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| 17 | }
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| 18 | */
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| 19 |
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| 20 |
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| 21 | class PerPageJSONFlatmap implements FlatMapFunction<String, JSONObject>
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| 22 | //public class PagedJSON implements VoidFunction<String>
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| 23 | {
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| 24 | private static final long serialVersionUID = 1L;
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| 25 |
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| 26 | protected String _input_dir;
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| 27 | protected String _solr_url;
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| 28 | protected String _output_dir;
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| 29 | protected int _verbosity;
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| 30 |
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| 31 | protected DoubleAccumulator _progress_accum;
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| 32 | protected double _progress_step;
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| 33 |
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[31045] | 34 | boolean _strict_file_io;
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| 35 |
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[31007] | 36 | public PerPageJSONFlatmap(String input_dir, String solr_url, String output_dir, int verbosity,
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[31045] | 37 | DoubleAccumulator progress_accum, double progress_step,
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| 38 | boolean strict_file_io)
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[31007] | 39 | {
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| 40 | _input_dir = input_dir;
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| 41 | _solr_url = solr_url;
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| 42 | _output_dir = output_dir;
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| 43 | _verbosity = verbosity;
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| 44 |
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| 45 | _progress_accum = progress_accum;
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| 46 | _progress_step = progress_step;
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[31045] | 47 |
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| 48 | _strict_file_io = strict_file_io;
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[31007] | 49 | }
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| 50 |
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[31045] | 51 | public Iterator<JSONObject> call(String json_file_in) throws IOException
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[31007] | 52 | //public void call(String json_file_in)
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| 53 | {
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[31045] | 54 | String full_json_file_in = _input_dir + "/" + json_file_in;
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| 55 | JSONObject extracted_feature_record = JSONClusterFileIO.readJSONFile(full_json_file_in);
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[31007] | 56 |
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[31045] | 57 | ArrayList<JSONObject> json_pages = new ArrayList<JSONObject>();
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[31007] | 58 |
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[31045] | 59 | if (extracted_feature_record != null) {
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| 60 | String volume_id = extracted_feature_record.getString("id");
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| 61 |
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| 62 | //JSONObject ef_metadata = extracted_feature_record.getJSONObject("metadata");
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| 63 | //String title= ef_metadata.getString("title");
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| 64 |
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| 65 | JSONObject ef_features = extracted_feature_record.getJSONObject("features");
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| 66 |
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| 67 |
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| 68 | int ef_page_count = ef_features.getInt("pageCount");
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| 69 |
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| 70 | if (_verbosity >= 1) {
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| 71 | System.out.println("Processing: " + json_file_in);
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| 72 | System.out.println(" pageCount = " + ef_page_count);
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[31030] | 73 | }
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[31045] | 74 |
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| 75 | JSONArray ef_pages = ef_features.getJSONArray("pages");
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| 76 | int ef_num_pages = ef_pages.length();
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| 77 | if (ef_num_pages != ef_page_count) {
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| 78 | System.err.println("Warning: number of page elements in JSON (" + ef_num_pages + ")"
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| 79 | +" does not match 'pageCount' metadata (" + ef_page_count + ")");
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| 80 | }
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| 81 |
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| 82 | // Make directory for page-level JSON output
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| 83 | String json_dir = ClusterFileIO.removeSuffix(json_file_in,".json.bz2");
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| 84 | String page_json_dir = json_dir + "/pages";
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| 85 | ClusterFileIO.createDirectoryAll(_output_dir + "/" + page_json_dir);
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| 86 |
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[31007] | 87 | if (_verbosity >= 2) {
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[31045] | 88 | System.out.print(" Pages: ");
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[31007] | 89 | }
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[31045] | 90 |
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| 91 | for (int i = 0; i < ef_page_count; i++) {
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| 92 | String formatted_i = String.format("page-%06d", i);
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| 93 | String page_id = volume_id + "." + formatted_i;
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| 94 |
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[31030] | 95 | if (_verbosity >= 2) {
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[31045] | 96 | if (i>0) {
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| 97 | System.out.print(", ");
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| 98 | }
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| 99 | System.out.print(page_id);
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[31030] | 100 | }
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[31045] | 101 |
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| 102 | String output_json_bz2 = page_json_dir +"/" + formatted_i + ".json.bz2";
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[31007] | 103 |
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[31045] | 104 | if (i==(ef_page_count-1)) {
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| 105 | if (_verbosity >= 2) {
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| 106 | System.out.println();
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| 107 | }
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| 108 | System.out.println("Sample output JSON page file: " + output_json_bz2);
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| 109 | }
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| 110 |
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| 111 | JSONObject ef_page = ef_pages.getJSONObject(i);
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| 112 |
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| 113 | if (ef_page != null) {
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| 114 | // Convert to Solr add form
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| 115 | JSONObject solr_add_doc_json = SolrDocJSON.generateSolrDocJSON(volume_id, page_id, ef_page);
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| 116 | solr_add_doc_json.put("filename_json_bz2", output_json_bz2);
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| 117 |
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| 118 | json_pages.add(solr_add_doc_json);
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| 119 |
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| 120 |
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| 121 | }
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| 122 | else {
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| 123 | System.err.println("Skipping: " + page_id);
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| 124 | }
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| 125 |
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[31007] | 126 | }
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[31045] | 127 | }
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| 128 | else {
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| 129 | // File did not exist, or could not be parsed
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| 130 | String mess = "Failed to read in bzipped JSON file '" + full_json_file_in + "'";
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| 131 | if (_strict_file_io) {
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| 132 | throw new IOException(mess);
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| 133 | }
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[31007] | 134 | else {
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[31045] | 135 | System.err.println("Warning: " + mess);
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| 136 | System.out.println("Warning: " + mess);
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[31007] | 137 | }
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| 138 | }
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[31045] | 139 |
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[31007] | 140 | _progress_accum.add(_progress_step);
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| 141 |
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| 142 | return json_pages.iterator();
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| 143 | }
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| 144 |
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| 145 |
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| 146 | }
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| 147 |
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