nl.pdok.shapeprocessing.data.shapes.FeatureToTableMappingLoader Maven / Gradle / Ivy

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package nl.pdok.shapeprocessing.data.shapes;

import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;

import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

public class FeatureToTableMappingLoader {
    private static final String FEATURETOTABLE = "featureToTableMapping";

    public FeatureToTableMappingLoader() {
    }

    public static FeatureToTableMapping LoadFeatureToTableFromJSON(Path featuresToTablesPath) throws Exception {
        FeatureToTableMapping featuresToTables = new FeatureToTableMapping();
        JSONObject featuresToTableJson = getJSONObject(featuresToTablesPath);
        if(featuresToTableJson == null) {
            return featuresToTables;
        } else {
            try {
                JSONObject e = (JSONObject)featuresToTableJson.get(FEATURETOTABLE);
                Set sources = e.keySet();
                Iterator iterator = sources.iterator();

                String key;
                while(iterator.hasNext()) {
                    key = (String)iterator.next();
                    Object table = e.get(key);
                    String tableName = (String)table;
                    featuresToTables.getFeatureToTables().put(key, tableName);
                }

                JSONObject attributes = (JSONObject)featuresToTableJson.get("attributes");
                Set attSources = attributes.keySet();
                Iterator attIterator = attSources.iterator();

                while(attIterator.hasNext()) {
                    key = (String)attIterator.next();

                    String value = (String) attributes.get(key);

                    featuresToTables.getAttributes().put(key, value);
                }

                return featuresToTables;
            } catch (ClassCastException var9) {
                throw new Exception("Invalid data");
            }
        }
    }

    private static Map simpleJsonMapToJavaMap(JSONObject featureAttributesJson) {
        if(featureAttributesJson == null) {
            return null;
        } else {
            HashMap featureAttributesMap = new HashMap();
            Set types = featureAttributesJson.keySet();
            Iterator i$ = types.iterator();

            while(i$.hasNext()) {
                String type = (String)i$.next();
                featureAttributesMap.put(type, (String)featureAttributesJson.get(type));
            }

            return featureAttributesMap;
        }
    }

    private static JSONObject getJSONObject(Path featuresToTablesFile) throws Exception {
        JSONObject featuresToTableJson = (JSONObject)(new JSONParser()).parse(Files.newBufferedReader(featuresToTablesFile, StandardCharsets.UTF_8));
        return featuresToTableJson != null && featuresToTableJson.containsKey(FEATURETOTABLE)?featuresToTableJson:null;
    }
}