package com.creativewidgetworks.goldparser.simple3.rulehandlers;
import com.creativewidgetworks.goldparser.engine.Reduction;
import com.creativewidgetworks.goldparser.parser.GOLDParser;
import com.creativewidgetworks.goldparser.parser.ProcessRule;
import com.creativewidgetworks.goldparser.parser.Variable;
import com.creativewidgetworks.goldparser.simple3.Simple3;
@ProcessRule(rule="<Value> ::= Id")
/**
* Rule handler for the assign value of a Variable rule.
*
* @author Ralph Iden (http://www.creativewidgetworks.com)
* @version 5.0.0
*/
public class Id extends Reduction {
private GOLDParser theParser;
private String variableName;
public Id(GOLDParser parser) {
theParser = parser;
Reduction reduction = parser.getCurrentReduction();
if (reduction != null) {
if (reduction.size() == 1) {
variableName = reduction.get(0).asString();
} else {
parser.raiseParserException(Simple3.formatMessage("error.param_count", "1", String.valueOf(reduction.size())));
}
} else {
parser.raiseParserException(Simple3.formatMessage("error.no_reduction"));
}
}
public String getVariableName() {
return variableName;
}
@Override
public Variable getValue() {
Variable var = theParser.getProgramVariable(variableName);
return var == null ? new Variable("") : var;
}
@Override
public String toString() {
return variableName + "=" + getValue();
}
}