com.obdobion.algebrain.token.TokOperator Maven / Gradle / Ivy

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package com.obdobion.algebrain.token;

import com.obdobion.algebrain.Equ;
import com.obdobion.algebrain.EquPart;
import com.obdobion.algebrain.ValueStack;

/**
 * @author Chris DeGreef
 *
 */
public class TokOperator extends Token
{
    public TokOperator()
    {
        super();
    }

    @Override
    public boolean accepts(final char s)
    {
        /*
         * possible second characters in a double (or more) character symbol
         */
        switch (s)
        {
        case '=':
            return true;
        case '&':
            return true;
        case '|':
            return true;
        default:
            break;
        }
        return false;
    }

    @Override
    public EquPart morph() throws Exception
    {
        final EquPart part = Equ.getInstance().operator(this);
        if (part == null)
            return this;
        return part;
    }

    /**
     * @param values
     */
    @Override
    public void resolve(final ValueStack values) throws Exception
    {
        throw new Exception("Unknown token encountered in equation: " + getValue().toString());
    }

    @Override
    public String toString()
    {
        return "nonop(" + super.toString() + ")";
    }
}