com.opengamma.engine.marketdata.live.LiveMarketDataProviderFactory.java Source code

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Here is the source code for com.opengamma.engine.marketdata.live.LiveMarketDataProviderFactory.java

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/**
 * Copyright (C) 2012 - present by OpenGamma Inc. and the OpenGamma group of companies
 * 
 * Please see distribution for license.
 */
package com.opengamma.engine.marketdata.live;

import java.util.Map;

import com.google.common.collect.ImmutableMap;
import com.opengamma.engine.marketdata.MarketDataProvider;
import com.opengamma.engine.marketdata.MarketDataProviderFactory;
import com.opengamma.engine.marketdata.spec.LiveMarketDataSpecification;
import com.opengamma.engine.marketdata.spec.MarketDataSpecification;

/**
 * Live data-source-based market data provider factory. 
 */
public class LiveMarketDataProviderFactory implements MarketDataProviderFactory {

    private final MarketDataProvider _defaultProvider;
    private final Map<String, MarketDataProvider> _sourceToProviderMap;

    public LiveMarketDataProviderFactory(MarketDataProvider defaultProvider,
            Map<String, MarketDataProvider> sourceToProviderMap) {
        _defaultProvider = defaultProvider;
        _sourceToProviderMap = ImmutableMap.copyOf(sourceToProviderMap);
    }

    @Override
    public MarketDataProvider create(MarketDataSpecification marketDataSpec) {
        LiveMarketDataSpecification liveSpec = (LiveMarketDataSpecification) marketDataSpec;
        if (liveSpec.getDataSource() == null) {
            return _defaultProvider;
        }
        MarketDataProvider provider = _sourceToProviderMap.get(liveSpec.getDataSource());
        if (provider == null) {
            throw new IllegalArgumentException(
                    "No provider found for data source name '" + liveSpec.getDataSource() + "'");
        }
        return provider;
    }

}