/*
Copyright 2011 frank asseg
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package de.congrace.exp4j;
import java.util.Stack;
/**
* A {@link Token} for representing variables
*
* @author fas
*/
class VariableToken extends CalculationToken {
/**
* construct a new {@link VariableToken}
*
* @param value
* the value of the token
*/
VariableToken(String value) {
super(value);
}
@Override
void mutateStackForCalculation(Stack<Variable> stack, VariableSet variableValues) {
Variable value = variableValues.getVariableNamed(this.getValue());
stack.push(value);
}
@Override
void mutateStackForInfixTranslation(Stack<Token> operatorStack, StringBuilder output) {
output.append(this.getValue()).append(" ");
}
}