com.opengamma.strata.report.framework.expression.TradeTokenEvaluator.java Source code

Introduction

Here is the source code for com.opengamma.strata.report.framework.expression.TradeTokenEvaluator.java

Source

/**
 * Copyright (C) 2015 - present by OpenGamma Inc. and the OpenGamma group of companies
 *
 * Please see distribution for license.
 */
package com.opengamma.strata.report.framework.expression;

import java.util.List;
import java.util.Optional;
import java.util.Set;

import org.joda.beans.Bean;
import org.joda.beans.JodaBeanUtils;
import org.joda.beans.MetaBean;

import com.google.common.collect.Sets;
import com.opengamma.strata.calc.runner.CalculationFunctions;
import com.opengamma.strata.product.Trade;
import com.opengamma.strata.product.TradeInfo;

/**
 * Evaluates a token against a trade to produce another object.
 * <p>
 * This merges the {@link Trade} and {@link TradeInfo} objects, giving priority to {@code Trade}.
 */
public class TradeTokenEvaluator extends TokenEvaluator<Trade> {

    @Override
    public Class<Trade> getTargetType() {
        return Trade.class;
    }

    @Override
    public Set<String> tokens(Trade trade) {
        MetaBean metaBean = JodaBeanUtils.metaBean(trade.getClass());
        return Sets.union(metaBean.metaPropertyMap().keySet(), trade.getInfo().propertyNames());
    }

    @Override
    public EvaluationResult evaluate(Trade trade, CalculationFunctions functions, String firstToken,
            List<String> remainingTokens) {

        MetaBean metaBean = JodaBeanUtils.metaBean(trade.getClass());

        // trade
        Optional<String> tradePropertyName = metaBean.metaPropertyMap().keySet().stream()
                .filter(p -> p.equalsIgnoreCase(firstToken)).findFirst();

        if (tradePropertyName.isPresent()) {
            Object propertyValue = metaBean.metaProperty(tradePropertyName.get()).get((Bean) trade);
            if (propertyValue == null) {
                return EvaluationResult.failure("Property '{}' not set", firstToken);
            }
            return EvaluationResult.success(propertyValue, remainingTokens);
        }

        // trade info
        Optional<String> tradeInfoPropertyName = trade.getInfo().propertyNames().stream()
                .filter(p -> p.equalsIgnoreCase(firstToken)).findFirst();

        if (tradeInfoPropertyName.isPresent()) {
            Object propertyValue = trade.getInfo().property(tradeInfoPropertyName.get()).get();
            if (propertyValue == null) {
                return EvaluationResult.failure("Property '{}' not set", firstToken);
            }
            return EvaluationResult.success(propertyValue, remainingTokens);
        }
        return invalidTokenFailure(trade, firstToken);
    }

}