Constants.java

package org.openntf.formula.function;

import java.util.Map;

import org.openntf.formula.FormulaContext;
import org.openntf.formula.Function;
import org.openntf.formula.FunctionFactory;
import org.openntf.formula.FunctionSet;
import org.openntf.formula.ValueHolder;
import org.openntf.formula.annotation.ParamCount;

public enum Constants {
	;

	public static class Functions extends FunctionSet {
		private static final Map<String, Function> functionSet = FunctionFactory.getFunctions(Constants.class);

		@Override
		public Map<String, Function> getFunctions() {
			return functionSet;
		}
	}

	@ParamCount(0)
	// Do not know if that will work
	public static ValueHolder atAll(final FormulaContext ctx) {
		return ctx.TRUE;
	}

	@ParamCount(0)
	public static ValueHolder atNothing() {
		return ValueHolder.valueNothing();
	}

	@ParamCount(0)
	public static ValueHolder atDeleteField() {
		return ValueHolder.valueUnavailable();
	}

	@ParamCount(0)
	public static ValueHolder atUnavailable() {
		return ValueHolder.valueUnavailable();
	}

	@ParamCount(0)
	public static ValueHolder atFalse(final FormulaContext ctx) {
		return ctx.FALSE;
	}

	@ParamCount(0)
	public static ValueHolder atNo(final FormulaContext ctx) {
		return ctx.FALSE;
	}

	@ParamCount(0)
	public static ValueHolder atTrue(final FormulaContext ctx) {
		return ctx.TRUE;
	}

	@ParamCount(0)
	public static ValueHolder atYes(final FormulaContext ctx) {
		return ctx.TRUE;
	}

	@ParamCount(0)
	public static ValueHolder atSuccess(final FormulaContext ctx) {
		return ctx.TRUE;
	}

	@ParamCount(0)
	public static ValueHolder atError(final FormulaContext ctx) {
		throw new IllegalArgumentException("@Error");
	}
}