com.opengamma.strata.basics.index.FloatingRateNameIniLookup.java Source code

Introduction

Here is the source code for com.opengamma.strata.basics.index.FloatingRateNameIniLookup.java

Source

/**
 * Copyright (C) 2016 - present by OpenGamma Inc. and the OpenGamma group of companies
 *
 * Please see distribution for license.
 */
package com.opengamma.strata.basics.index;

import java.util.Map;
import java.util.logging.Logger;

import com.google.common.base.Throwables;
import com.google.common.collect.ImmutableMap;
import com.opengamma.strata.collect.io.IniFile;
import com.opengamma.strata.collect.io.PropertySet;
import com.opengamma.strata.collect.io.ResourceConfig;
import com.opengamma.strata.collect.named.NamedLookup;

/**
 * Loads standard floating rate names from INI.
 */
final class FloatingRateNameIniLookup implements NamedLookup<FloatingRateName> {

    /**
     * The logger.
     */
    private static final Logger log = Logger.getLogger(FloatingRateNameIniLookup.class.getName());
    /**
     * The singleton instance of the lookup.
     */
    public static final FloatingRateNameIniLookup INSTANCE = new FloatingRateNameIniLookup();

    /**
     * INI file for floating rate names.
     */
    private static final String FLOATING_RATE_NAME_INI = "FloatingRateNameData.ini";
    /**
     * The cache by name.
     */
    private static final ImmutableMap<String, FloatingRateName> BY_NAME = loadIndices();

    /**
     * Restricted constructor.
     */
    private FloatingRateNameIniLookup() {
    }

    //-------------------------------------------------------------------------
    @Override
    public Map<String, FloatingRateName> lookupAll() {
        return BY_NAME;
    }

    //-------------------------------------------------------------------------
    /**
     * Loads the available indices.
     * 
     * @return the map of known indices
     */
    static ImmutableMap<String, FloatingRateName> loadIndices() {
        try {
            IniFile ini = ResourceConfig.combinedIniFile(FLOATING_RATE_NAME_INI);
            return parseIndices(ini);

        } catch (RuntimeException ex) {
            // logging used because this is loaded in a static variable
            log.severe(Throwables.getStackTraceAsString(ex));
            // return an empty instance to avoid ExceptionInInitializerError
            return ImmutableMap.of();
        }
    }

    // parse the config file FloatingRateName.ini
    private static ImmutableMap<String, FloatingRateName> parseIndices(IniFile ini) {
        ImmutableMap.Builder<String, FloatingRateName> builder = ImmutableMap.builder();
        parseSection(ini.section("ibor"), "-", FloatingRateType.IBOR, builder);
        parseSection(ini.section("overnightCompounded"), "", FloatingRateType.OVERNIGHT_COMPOUNDED, builder);
        parseSection(ini.section("overnightAveraged"), "", FloatingRateType.OVERNIGHT_AVERAGED, builder);
        parseSection(ini.section("price"), "", FloatingRateType.PRICE, builder);
        return builder.build();
    }

    // parse a single section
    private static void parseSection(PropertySet section, String indexNameSuffix, FloatingRateType type,
            ImmutableMap.Builder<String, FloatingRateName> builder) {

        // find our names from the RHS of the key/value pairs
        for (String key : section.keys()) {
            builder.put(key, ImmutableFloatingRateName.of(key, section.value(key) + indexNameSuffix, type));
        }
    }

}