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

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

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/**
 * 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 com.google.common.collect.ImmutableSet;
import com.opengamma.strata.basics.currency.CurrencyAmount;
import com.opengamma.strata.calc.runner.CalculationFunctions;

/**
 * Evaluates a token against a currency amount.
 */
public class CurrencyAmountTokenEvaluator extends TokenEvaluator<CurrencyAmount> {

    private final String CURRENCY_FIELD = "currency";
    private final String AMOUNT_FIELD = "amount";

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

    @Override
    public ImmutableSet<String> tokens(CurrencyAmount amount) {
        return ImmutableSet.of(CURRENCY_FIELD, AMOUNT_FIELD);
    }

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

        if (firstToken.equalsIgnoreCase(CURRENCY_FIELD)) {
            return EvaluationResult.success(amount.getCurrency(), remainingTokens);
        }
        if (firstToken.equalsIgnoreCase(AMOUNT_FIELD)) {
            // Can be rendered directly - retains the currency for formatting purposes
            return EvaluationResult.success(amount, remainingTokens);
        }
        return invalidTokenFailure(amount, firstToken);
    }

}