/**
* Copyright (C) 2009 - present by OpenGamma Inc. and the OpenGamma group of companies
*
* Please see distribution for license.
*/
package com.opengamma.engine.fudgemsg;
import java.util.List;
import java.util.Set;
import org.fudgemsg.FudgeMsg;
import org.fudgemsg.MutableFudgeMsg;
import org.fudgemsg.mapping.FudgeBuilder;
import org.fudgemsg.mapping.FudgeBuilderFor;
import org.fudgemsg.mapping.FudgeDeserializer;
import org.fudgemsg.mapping.FudgeSerializer;
import com.opengamma.engine.ComputationTarget;
import com.opengamma.engine.ComputationTargetSpecification;
import com.opengamma.engine.target.ComputationTargetType;
import com.opengamma.engine.target.ComputationTargetTypeVisitor;
import com.opengamma.id.UniqueIdentifiable;
/**
* Fudge message builder for {@link ComputationTarget}.
*
* <pre>
* message ComputationTarget extends ComputationTargetSpecification {
* required Object value; // the target value
* }
* </pre>
*/
@FudgeBuilderFor(ComputationTarget.class)
public class ComputationTargetFudgeBuilder implements FudgeBuilder<ComputationTarget> {
private static final String VALUE_FIELD = "value";
@Override
public MutableFudgeMsg buildMessage(FudgeSerializer serializer, ComputationTarget object) {
MutableFudgeMsg msg = serializer.newMessage();
ComputationTargetReferenceFudgeBuilder.buildMessageImpl(serializer, msg, object.toSpecification());
serializer.addToMessageWithClassHeaders(msg, VALUE_FIELD, null, object.getValue());
return msg;
}
private static final ComputationTargetTypeVisitor<Void, Class<? extends UniqueIdentifiable>> s_getLeafType = new ComputationTargetTypeVisitor<Void, Class<? extends UniqueIdentifiable>>() {
@Override
public Class<? extends UniqueIdentifiable> visitMultipleComputationTargetTypes(final Set<ComputationTargetType> types, final Void data) {
throw new IllegalArgumentException();
}
@Override
public Class<? extends UniqueIdentifiable> visitNestedComputationTargetTypes(final List<ComputationTargetType> types, final Void data) {
return types.get(types.size() - 1).accept(this, data);
}
@Override
public Class<? extends UniqueIdentifiable> visitNullComputationTargetType(final Void data) {
return null;
}
@Override
public Class<? extends UniqueIdentifiable> visitClassComputationTargetType(final Class<? extends UniqueIdentifiable> type, final Void data) {
return type;
}
};
@Override
public ComputationTarget buildObject(FudgeDeserializer deserializer, FudgeMsg message) {
final ComputationTargetSpecification specification = ComputationTargetReferenceFudgeBuilder.buildObjectImpl(deserializer, message).getSpecification();
final Class<? extends UniqueIdentifiable> valueType = specification.getType().accept(s_getLeafType, null);
if (valueType != null) {
final UniqueIdentifiable value = deserializer.fieldValueToObject(valueType, message.getByName(VALUE_FIELD));
return new ComputationTarget(specification, value);
} else {
return ComputationTarget.NULL;
}
}
}