com.opengamma.engine.marketdata.AbstractMarketDataSnapshot.java Source code

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

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/**
 * Copyright (C) 2011 - present by OpenGamma Inc. and the OpenGamma group of companies
 *
 * Please see distribution for license.
 */
package com.opengamma.engine.marketdata;

import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;

import com.google.common.collect.Maps;
import com.opengamma.engine.value.ValueSpecification;

/**
 * Base implementation of {@link MarketDataSnapshot}.
 */
public abstract class AbstractMarketDataSnapshot implements MarketDataSnapshot {

    /**
     * No-op implementation.
     */
    @Override
    public void init() {
        // No-op
    }

    /**
     * No-op implementation.
     *
     * {@inheritDoc}
     */
    @Override
    public void init(final Set<ValueSpecification> values, final long timeout, final TimeUnit unit) {
        // No-op
    }

    /**
     * Implementation based on the {@link #query(ValueSpecification)} method. {@inheritDoc}
     */
    @Override
    public Map<ValueSpecification, Object> query(final Set<ValueSpecification> specifications) {
        final Map<ValueSpecification, Object> results = Maps.newHashMapWithExpectedSize(specifications.size());
        for (final ValueSpecification specification : specifications) {
            final Object value = query(specification);
            if (value != null) {
                results.put(specification, value);
            }
        }
        return results;
    }

    protected void assertInitialized() {
        if (!isInitialized()) {
            throw new IllegalStateException("Market data snapshot is not initialized");
        }
    }

}