com.github.bloodshura.x.venus.expression.InContext Maven / Gradle / Ivy

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/*
 * 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.venus.exception.runtime.InvalidValueTypeException;
import com.github.bloodshura.x.venus.exception.runtime.ScriptRuntimeException;
import com.github.bloodshura.x.venus.executor.Context;
import com.github.bloodshura.x.venus.value.ObjectValue;
import com.github.bloodshura.x.venus.value.Value;

public class InContext implements Expression {
	private final Expression expression;
	private final String name;

	public InContext(String name, Expression expression) {
		this.name = name;
		this.expression = expression;
	}

	public Expression getExpression() {
		return expression;
	}

	public String getName() {
		return name;
	}

	@Override
	public Value resolve(Context context) throws ScriptRuntimeException {
		Value value = context.getVarValue(getName());

		if (value instanceof ObjectValue) {
			ObjectValue object = (ObjectValue) value;

			return getExpression().resolve(object.getContext()); // See issue #24
		}
		else {
			throw new InvalidValueTypeException(context, getName() + " has type " + value.getType() + "; expected to be an object");
		}
	}

	@Override
	public String toString() {
		return "incontext(" + getName() + " << " + getExpression() + ')';
	}
}