Java tutorial
/** * Copyright (C) 2009 - present by OpenGamma Inc. and the OpenGamma group of companies * * Please see distribution for license. */ package com.opengamma.master.region.impl; import java.io.BufferedInputStream; import java.io.InputStream; import java.io.InputStreamReader; import java.io.Reader; import java.util.Arrays; import java.util.HashMap; import java.util.HashSet; import java.util.List; import java.util.Map; import java.util.Map.Entry; import java.util.Set; import org.apache.commons.io.IOUtils; import org.apache.commons.lang.StringUtils; import au.com.bytecode.opencsv.CSVReader; import com.google.common.base.Charsets; import com.opengamma.OpenGammaRuntimeException; import com.opengamma.core.id.ExternalSchemes; import com.opengamma.core.region.RegionClassification; import com.opengamma.id.UniqueId; import com.opengamma.master.region.ManageableRegion; import com.opengamma.master.region.RegionDocument; import com.opengamma.master.region.RegionMaster; import com.opengamma.util.ArgumentChecker; import com.opengamma.util.i18n.Country; import com.opengamma.util.money.Currency; /** * Loads a CSV formatted region file * <p> * This populates a region master. */ public class RegionFileReader { /** * Path to the default regions file */ private static final String REGIONS_RESOURCE = "/com/opengamma/region/regions.csv"; /** * The name column header. */ private static final String NAME_COLUMN = "Name"; /** * The full name column header. */ private static final String FORMAL_NAME_COLUMN = "Formal Name"; /** * The type column header. */ private static final String CLASSIFICATION_COLUMN = "Type"; /** * The sovereignty column header. */ private static final String SOVEREIGNITY_COLUMN = "Sovereignty"; /** * The country code column header. */ private static final String ISO_COUNTRY_2_COLUMN = "ISO 3166-1 2 Letter Code"; /** * The currency code column header. */ private static final String ISO_CURRENCY_3_COLUMN = "ISO 4217 Currency Code"; /** * The sub regions column header */ private static final String SUB_REGIONS_COLUMN = "Sub Regions"; /** * The region master to populate. */ private RegionMaster _regionMaster; /** * Creates a populated in-memory master and source. * <p> * The values can be extracted using the accessor methods. * * @return the region reader, not null */ public static RegionFileReader createPopulated() { return createPopulated0(new InMemoryRegionMaster()); } /** * Populates a region master. * * @param regionMaster the region master to populate, not null * @return the master, not null */ public static RegionMaster createPopulated(RegionMaster regionMaster) { return createPopulated0(regionMaster).getRegionMaster(); } /** * Creates a populated file reader. * <p> * The values can be extracted using the accessor methods. * * @param regionMaster the region master to populate, not null * @return the region reader, not null */ private static RegionFileReader createPopulated0(RegionMaster regionMaster) { RegionFileReader fileReader = new RegionFileReader(regionMaster); InputStream stream = regionMaster.getClass().getResourceAsStream(REGIONS_RESOURCE); try { fileReader.parse(stream); } finally { IOUtils.closeQuietly(stream); } UnLocodeRegionFileReader.populate(regionMaster); return fileReader; } //------------------------------------------------------------------------- /** * Creates an instance with a master to populate. * * @param regionMaster the region master, not null */ public RegionFileReader(RegionMaster regionMaster) { ArgumentChecker.notNull(regionMaster, "regionMaster"); _regionMaster = regionMaster; } //------------------------------------------------------------------------- /** * Gets the region master. * @return the region master, not null */ public RegionMaster getRegionMaster() { return _regionMaster; } /** * Gets a {@code MasterRegionSource} for the master. * @return the region source, not null */ public MasterRegionSource getRegionSource() { return new MasterRegionSource(getRegionMaster()); } //------------------------------------------------------------------------- /** * Parses the specified file to populate the master. * * @param in the input stream to read, not null */ public void parse(InputStream in) { InputStreamReader reader = new InputStreamReader(new BufferedInputStream(in), Charsets.UTF_8); try { parse(reader); } finally { IOUtils.closeQuietly(reader); } } /** * Parses the specified file to populate the master. * * @param in the input reader to read, not closed, not null */ public void parse(Reader in) { String name = null; try { Map<String, ManageableRegion> regions = new HashMap<String, ManageableRegion>(); Map<UniqueId, Set<String>> subRegions = new HashMap<UniqueId, Set<String>>(); // open CSV file @SuppressWarnings("resource") CSVReader reader = new CSVReader(in); List<String> columns = Arrays.asList(reader.readNext()); // identify columns final int nameColumnIdx = columns.indexOf(NAME_COLUMN); final int formalNameColumnIdx = columns.indexOf(FORMAL_NAME_COLUMN); final int classificationColumnIdx = columns.indexOf(CLASSIFICATION_COLUMN); final int sovereignityColumnIdx = columns.indexOf(SOVEREIGNITY_COLUMN); final int countryColumnIdx = columns.indexOf(ISO_COUNTRY_2_COLUMN); final int currencyColumnIdx = columns.indexOf(ISO_CURRENCY_3_COLUMN); final int subRegionsColumnIdx = columns.indexOf(SUB_REGIONS_COLUMN); // parse String[] row = null; while ((row = reader.readNext()) != null) { name = row[nameColumnIdx].trim(); // the primary key String fullName = StringUtils.trimToNull(row[formalNameColumnIdx]); if (fullName == null) { fullName = name; } RegionClassification classification = RegionClassification .valueOf(row[classificationColumnIdx].trim()); String sovereignity = StringUtils.trimToNull(row[sovereignityColumnIdx]); String countryISO = StringUtils.trimToNull(row[countryColumnIdx]); String currencyISO = StringUtils.trimToNull(row[currencyColumnIdx]); Set<String> rowSubRegions = new HashSet<String>(Arrays.asList(row[subRegionsColumnIdx].split(";"))); rowSubRegions = trim(rowSubRegions); ManageableRegion region = new ManageableRegion(); region.setClassification(classification); region.setName(name); region.setFullName(fullName); if (countryISO != null) { region.setCountry(Country.of(countryISO)); region.addExternalId(ExternalSchemes.financialRegionId(countryISO)); // TODO: looks odd } if (currencyISO != null) { region.setCurrency(Currency.of(currencyISO)); } if (sovereignity != null) { ManageableRegion parent = regions.get(sovereignity); if (parent == null) { throw new OpenGammaRuntimeException( "Cannot find parent '" + sovereignity + "' for '" + name + "'"); } region.getParentRegionIds().add(parent.getUniqueId()); } for (Entry<UniqueId, Set<String>> entry : subRegions.entrySet()) { if (entry.getValue().remove(name)) { region.getParentRegionIds().add(entry.getKey()); } } // store RegionDocument doc = getRegionMaster().add(new RegionDocument(region)); if (rowSubRegions.size() > 0) { subRegions.put(doc.getUniqueId(), rowSubRegions); } regions.put(name, region); } for (Set<String> set : subRegions.values()) { if (set.size() > 0) { throw new OpenGammaRuntimeException("Cannot find children: " + set); } } } catch (Exception ex) { String detail = (name != null ? " while processing " + name : ""); throw new OpenGammaRuntimeException("Cannot open region data file (or file I/O problem)" + detail, ex); } } /** * Trim the contents of a set. * @param subRegions the set to trim, not null * @return the trimmed set, not null */ private Set<String> trim(Set<String> subRegions) { Set<String> result = new HashSet<String>(); for (String subRegion : subRegions) { String trimmed = subRegion.trim(); if (trimmed.isEmpty() == false) { result.add(trimmed); } } return result; } }