package de.skuzzle.polly.core.parser.ast.lang.operators;
import de.skuzzle.polly.core.parser.Position;
import de.skuzzle.polly.core.parser.ast.declarations.Namespace;
import de.skuzzle.polly.core.parser.ast.declarations.types.Type;
import de.skuzzle.polly.core.parser.ast.expressions.literals.DateLiteral;
import de.skuzzle.polly.core.parser.ast.expressions.literals.Literal;
import de.skuzzle.polly.core.parser.ast.expressions.literals.TimespanLiteral;
import de.skuzzle.polly.core.parser.ast.lang.BinaryOperator;
import de.skuzzle.polly.core.parser.ast.visitor.ASTTraversalException;
import de.skuzzle.polly.core.parser.ast.visitor.ExecutionVisitor;
import de.skuzzle.polly.tools.collections.Stack;
public class DateTimespanArithmetic extends BinaryOperator<DateLiteral, TimespanLiteral>{
public DateTimespanArithmetic(OpType id) {
super(id);
this.initTypes(Type.DATE, Type.DATE, Type.TIMESPAN);
}
@Override
protected void exec(Stack<Literal> stack, Namespace ns, DateLiteral left,
TimespanLiteral right, Position resultPos, ExecutionVisitor execVisitor)
throws ASTTraversalException {
switch (this.getOp()) {
case ADD:
stack.push(new DateLiteral(resultPos, right.addToDate(left.getValue())));
break;
case SUB:
final TimespanLiteral tmp = new TimespanLiteral(right.getPosition(),
-right.getSeconds());
stack.push(new DateLiteral(resultPos, tmp.addToDate(left.getValue())));
break;
default:
this.invalidOperatorType(this.getOp());
}
}
}