<commit_before>package thredds.server.radarServer2;

import ucar.nc2.constants.FeatureType;
import ucar.nc2.dt.RadialDatasetSweep;
import ucar.nc2.ft.FeatureDatasetFactoryManager;
import ucar.nc2.time.*;
import ucar.nc2.units.DateRange;
import ucar.unidata.geoloc.EarthLocation;

import java.io.File;
import java.io.IOException;
import java.nio.file.*;
import java.nio.file.attribute.BasicFileAttributes;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;

/**
 * Class to manage generating an inventory of radar data and providing a way
 * to query what data are available.
 *
 * @author rmay
 * @since 01/15/2015
 */

public class RadarDataInventory {
    public enum DirType {
        Station, Variable, Date
    }

    private static final long updateIntervalMsec = 600000;
    private EnumMap<DirType, Set<String>> items;
    private Path collectionDir;
    private DirectoryStructure structure;
    private String fileTimeRegex, fileTimeFmt, dataFormat;
    private boolean dirty;
    private CalendarDate lastUpdate;
    private int maxCrawlItems, maxCrawlDepth;
    private StationList stations;
    private CalendarPeriod nearestWindow, rangeAdjustment;
    private String name, description;
    private DateRange timeCoverage;
    private RadarServerConfig.RadarConfigEntry.GeoInfo geoCoverage;

    public RadarDataInventory(Path datasetRoot) {
        items = new EnumMap<>(DirType.class);
        collectionDir = datasetRoot;
        structure = new DirectoryStructure(collectionDir);
        dirty = true;
        maxCrawlItems = 5;
        maxCrawlDepth = 3;
        stations = new StationList();
        nearestWindow = CalendarPeriod.of(1, CalendarPeriod.Field.Hour);
    }

    public Path getCollectionDir()
    {
        return collectionDir;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    CalendarDate getLastUpdate() {
        return this.lastUpdate;
    }

    // TODO: Can we pull this from data?
    public FeatureType getFeatureType() {
        return FeatureType.RADIAL;
    }

    public void setDataFormat(String format) {
        this.dataFormat = format;
    }

    public String getDataFormat() {
        return dataFormat;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public void setTimeCoverage(DateRange range) {
        this.timeCoverage = range;
    }

    public DateRange getTimeCoverage() {
        return this.timeCoverage;
    }

    public void setGeoCoverage(RadarServerConfig.RadarConfigEntry.GeoInfo info) {
        this.geoCoverage = info;
    }

    public RadarServerConfig.RadarConfigEntry.GeoInfo getGeoCoverage() {
        return this.geoCoverage;
    }

    public boolean needsVar() {
        return items.containsKey(DirType.Variable);
    }

    public StationList getStationList() {
        return stations;
    }

    public List<String> getVariableList() {
        return listItems(DirType.Variable);
    }

    public void setNearestWindow(CalendarPeriod pd) {
        nearestWindow = pd;
    }

    public static class DirectoryStructure {
        private static class DirEntry {
            public DirType type;
            public String fmt;
            public DirEntry(DirType type, String fmt) {
                this.type = type;
                this.fmt = fmt;
            }
        }

        private class DirectoryDateMatcher {
            // Map a directory level to a date format
            List<Integer> levels;
            String fmt;

            public DirectoryDateMatcher() {
                levels = new ArrayList<>(4);
                fmt = "";
            }

            public void add(int level, String value) {
                levels.add(level);
                fmt += value;
            }

            public SimpleDateFormat getFormat() {
                SimpleDateFormat sdf = new SimpleDateFormat(fmt);
                sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
                return sdf;
            }

            public Date getDate(Path path) {
                Path relPath = base.relativize(path);
                String[] parts = relPath.toString().split(sep);
                StringBuilder sb = new StringBuilder("");
                for (Integer l: levels) {
                    sb.append(parts[l]);
                }
                try {
                    SimpleDateFormat fmt = getFormat();
                    return fmt.parse(sb.toString());
                } catch (ParseException e) {
                    return null;
                }
            }
        }

        private Path base;
        private String sep;

        private List<DirEntry> order;
        private List<Integer> keyIndices;

        public DirectoryStructure(Path dir) {
            base = dir;
            sep = System.getProperty("file.separator");
            order = new ArrayList<>();
            keyIndices = new ArrayList<>();
        }

        public void addSubDir(DirType type, String fmt) {
            if (type == DirType.Station || type == DirType.Variable) {
                keyIndices.add(order.size());
            }
            order.add(new DirEntry(type, fmt));
        }

        // Get a key for a path based on station/var
        public String getKey(Path path) {
            Path relPath = base.relativize(path);
            String[] parts = relPath.toString().split(sep);
            StringBuilder sb = new StringBuilder("");
            for (int ind: keyIndices) {
                sb.append(parts[ind]);
            }
            return sb.toString();
        }

        public DirectoryDateMatcher matcher() { return new DirectoryDateMatcher(); }
    }

    public void addStationDir() {
        structure.addSubDir(DirType.Station, null);
        dirty = true;
    }

    public void addVariableDir() {
        structure.addSubDir(DirType.Variable, null);
        dirty = true;<commit_msg>RadarServer: Remove getting the system path separator.<commit_after>package thredds.server.radarServer2;

import ucar.nc2.constants.FeatureType;
import ucar.nc2.dt.RadialDatasetSweep;
import ucar.nc2.ft.FeatureDatasetFactoryManager;
import ucar.nc2.time.*;
import ucar.nc2.units.DateRange;
import ucar.unidata.geoloc.EarthLocation;

import java.io.File;
import java.io.IOException;
import java.nio.file.*;
import java.nio.file.attribute.BasicFileAttributes;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;

/**
 * Class to manage generating an inventory of radar data and providing a way
 * to query what data are available.
 *
 * @author rmay
 * @since 01/15/2015
 */

public class RadarDataInventory {
    public enum DirType {
        Station, Variable, Date
    }

    private static final long updateIntervalMsec = 600000;
    private EnumMap<DirType, Set<String>> items;
    private Path collectionDir;
    private DirectoryStructure structure;
    private String fileTimeRegex, fileTimeFmt, dataFormat;
    private boolean dirty;
    private CalendarDate lastUpdate;
    private int maxCrawlItems, maxCrawlDepth;
    private StationList stations;
    private CalendarPeriod nearestWindow, rangeAdjustment;
    private String name, description;
    private DateRange timeCoverage;
    private RadarServerConfig.RadarConfigEntry.GeoInfo geoCoverage;

    public RadarDataInventory(Path datasetRoot) {
        items = new EnumMap<>(DirType.class);
        collectionDir = datasetRoot;
        structure = new DirectoryStructure(collectionDir);
        dirty = true;
        maxCrawlItems = 5;
        maxCrawlDepth = 3;
        stations = new StationList();
        nearestWindow = CalendarPeriod.of(1, CalendarPeriod.Field.Hour);
    }

    public Path getCollectionDir()
    {
        return collectionDir;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    CalendarDate getLastUpdate() {
        return this.lastUpdate;
    }

    // TODO: Can we pull this from data?
    public FeatureType getFeatureType() {
        return FeatureType.RADIAL;
    }

    public void setDataFormat(String format) {
        this.dataFormat = format;
    }

    public String getDataFormat() {
        return dataFormat;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public void setTimeCoverage(DateRange range) {
        this.timeCoverage = range;
    }

    public DateRange getTimeCoverage() {
        return this.timeCoverage;
    }

    public void setGeoCoverage(RadarServerConfig.RadarConfigEntry.GeoInfo info) {
        this.geoCoverage = info;
    }

    public RadarServerConfig.RadarConfigEntry.GeoInfo getGeoCoverage() {
        return this.geoCoverage;
    }

    public boolean needsVar() {
        return items.containsKey(DirType.Variable);
    }

    public StationList getStationList() {
        return stations;
    }

    public List<String> getVariableList() {
        return listItems(DirType.Variable);
    }

    public void setNearestWindow(CalendarPeriod pd) {
        nearestWindow = pd;
    }

    public static class DirectoryStructure {
        private static class DirEntry {
            public DirType type;
            public String fmt;
            public DirEntry(DirType type, String fmt) {
                this.type = type;
                this.fmt = fmt;
            }
        }

        private class DirectoryDateMatcher {
            // Map a directory level to a date format
            List<Integer> levels;
            String fmt;

            public DirectoryDateMatcher() {
                levels = new ArrayList<>(4);
                fmt = "";
            }

            public void add(int level, String value) {
                levels.add(level);
                fmt += value;
            }

            public SimpleDateFormat getFormat() {
                SimpleDateFormat sdf = new SimpleDateFormat(fmt);
                sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
                return sdf;
            }

            public Date getDate(Path path) {
                Path relPath = base.relativize(path);
                StringBuilder sb = new StringBuilder("");
                for (Integer l: levels) {
                    sb.append(relPath.getName(l));
                }
                try {
                    SimpleDateFormat fmt = getFormat();
                    return fmt.parse(sb.toString());
                } catch (ParseException e) {
                    return null;
                }
            }
        }

        private Path base;

        private List<DirEntry> order;
        private List<Integer> keyIndices;

        public DirectoryStructure(Path dir) {
            base = dir;
            order = new ArrayList<>();
            keyIndices = new ArrayList<>();
        }

        public void addSubDir(DirType type, String fmt) {
            if (type == DirType.Station || type == DirType.Variable) {
                keyIndices.add(order.size());
            }
            order.add(new DirEntry(type, fmt));
        }

        // Get a key for a path based on station/var
        public String getKey(Path path) {
            Path relPath = base.relativize(path);
            StringBuilder sb = new StringBuilder("");
            for (int ind: keyIndices) {
                sb.append(relPath.getName(ind));
            }
            return sb.toString();
        }

        public DirectoryDateMatcher matcher() { return new DirectoryDateMatcher(); }
    }

    public void addStationDir() {
        structure.addSubDir(DirType.Station, null);
        dirty = true;
    }

    public void addVariableDir() {
        structure.addSubDir(DirType.Variable, null);
        dirty = true;
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