/**
* Copyright (C) 2012 - present by OpenGamma Inc. and the OpenGamma group of companies
*
* Please see distribution for license.
*/
package com.opengamma.bbg.referencedata.impl;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.fudgemsg.FudgeMsg;
import org.fudgemsg.MutableFudgeMsg;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.opengamma.bbg.referencedata.ReferenceData;
import com.opengamma.bbg.referencedata.ReferenceDataProvider;
import com.opengamma.bbg.referencedata.ReferenceDataProviderGetRequest;
import com.opengamma.bbg.referencedata.ReferenceDataProviderGetResult;
import com.opengamma.util.fudgemsg.OpenGammaFudgeContext;
import com.opengamma.util.tuple.Pair;
/**
* A decorator for a ReferenceDataProvider that allows you to override the results
* from the underlying provider e.g. if you have extra information from another source.
*/
public class PatchableReferenceDataProvider extends AbstractReferenceDataProvider {
/** Logger. */
private static final Logger s_logger = LoggerFactory.getLogger(PatchableReferenceDataProvider.class);
private Map<Pair<String, String>, Object> _patches = new HashMap<Pair<String, String>, Object>();
private Set<String> _securities = new HashSet<String>();
private ReferenceDataProvider _underlying;
/**
* Creates an instance.
*
* @param underlying the underlying source of reference data
*/
public PatchableReferenceDataProvider(ReferenceDataProvider underlying) {
_underlying = underlying;
}
//-------------------------------------------------------------------------
/**
* Sets an override or replacement value.
*
* @param security the Bloomberg security identifier
* @param field the Bloomberg field name
* @param result the object to return as a result (must be possible to Fudge encode with standard OG dictionary)
*/
public void setPatch(String security, String field, Object result) {
_patches.put(Pair.of(security, field), result);
_securities.add(security);
}
//-------------------------------------------------------------------------
@Override
protected ReferenceDataProviderGetResult doBulkGet(ReferenceDataProviderGetRequest request) {
ReferenceDataProviderGetResult rawResult = _underlying.getReferenceData(request);
ReferenceDataProviderGetResult newResult = new ReferenceDataProviderGetResult();
for (ReferenceData refData : rawResult.getReferenceData()) {
String identifier = refData.getIdentifier();
if (_securities.contains(identifier)) {
FudgeMsg fieldData = refData.getFieldValues();
MutableFudgeMsg alteredFieldData = OpenGammaFudgeContext.getInstance().newMessage(fieldData);
for (String field : request.getFields()) {
if (_patches.containsKey(Pair.of(identifier, field))) {
if (alteredFieldData.hasField(field)) {
alteredFieldData.remove(field);
}
alteredFieldData.add(field, _patches.get(Pair.of(identifier, field)));
refData.removeErrors(field);
}
}
s_logger.debug("Patching {} with {}", new Object[] {fieldData, alteredFieldData });
refData.setFieldValues(alteredFieldData);
}
newResult.addReferenceData(refData);
}
return newResult;
}
}