com.codetaco.cli.directive.EquDirective Maven / Gradle / Ivy

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package com.codetaco.cli.directive;

import java.io.IOException;
import java.text.ParseException;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.codetaco.math.Equ;
import com.codetaco.cli.input.Token;
import com.codetaco.date.TemporalHelper;

/**
 * This class parses phrases that will be used to run an equation. That result
 * is returned as a literal token to be inserted into the command line at the
 * same position as this directive.
 *
 * @author Chris DeGreef [email protected]
 */
public class EquDirective extends DirectiveCommand {
    private final static Logger logger = LoggerFactory.getLogger(EquDirective.class.getName());

    /**
     * 
     * Constructor for DateDirective.
     * 
     *
     * @param _data a {@link java.lang.String} object.
     */
    public EquDirective(final String _data) {
        super(_data);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Token replaceToken(final Token[] tokens, final int replacingFromTokenIndex, final int replaceToTokenIndex)
      throws ParseException, IOException {
        final Equ equ = Equ.getInstance(true);
        String resultAsATokenValue = null;
        try {
            Object equResult;
            equResult = equ.evaluate(data);
            if (equResult instanceof LocalDateTime) {
                final LocalDateTime ldt = (LocalDateTime) equResult;
                if (ldt.toLocalDate().equals(LocalDate.MIN))
                    resultAsATokenValue = TemporalHelper.getOutputTF().format(ldt);
                else if (ldt.toLocalTime().equals(LocalTime.MIN))
                    resultAsATokenValue = TemporalHelper.getOutputDF().format(ldt);
                else
                    resultAsATokenValue = TemporalHelper.getOutputDTF().format(ldt);
            } else
                resultAsATokenValue = equResult.toString();

        } catch (final Exception e) {
            logger.error("{}", e.getMessage(), e);
            throw new ParseException(e.getMessage(), 0);
        }

        return new Token(tokens[replacingFromTokenIndex].charCommand(),
          resultAsATokenValue,
          tokens[replacingFromTokenIndex].getInputStartX(),
          tokens[replaceToTokenIndex].getInputEndX(),
          true);
    }
}