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A dynamic, easy, highly customizable scripting language.

There is a newer version: 2.0.0

/*
 * Copyright (c) 2013-2018, João Vitor Verona Biazibetti - All Rights Reserved
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see .
 *
 * https://www.github.com/BloodShura
 */

package com.github.bloodshura.x.venus.expression;

import com.github.bloodshura.x.util.XApi;
import com.github.bloodshura.x.venus.exception.runtime.IncompatibleTypesException;
import com.github.bloodshura.x.venus.exception.runtime.ScriptRuntimeException;
import com.github.bloodshura.x.venus.executor.Context;
import com.github.bloodshura.x.venus.operator.UnaryOperator;
import com.github.bloodshura.x.venus.value.Value;

public class UnaryOperation implements Expression {
	private final UnaryOperator operator;
	private final Expression expression;

	public UnaryOperation(UnaryOperator operator, Expression expression) {
		XApi.requireNonNull(expression, "expression");
		XApi.requireNonNull(operator, "operator");

		this.operator = operator;
		this.expression = expression;
	}

	public UnaryOperator getOperator() {
		return operator;
	}

	public Expression getExpression() {
		return expression;
	}

	@Override
	public Value resolve(Context context) throws ScriptRuntimeException {
		Value value = getExpression().resolve(context);
		Value result = getOperator().operate(context, value);

		if (result == null) {
			throw new IncompatibleTypesException(context, "Operator " + getOperator() + " cannot be applied with " + value.getType());
		}

		return result;
	}

	@Override
	public String toString() {
		return "unioperation(" + getOperator() + " [" + getExpression() + "])";
	}
}