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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.function;

import com.github.bloodshura.x.collection.view.XArrayView;
import com.github.bloodshura.x.collection.view.XBasicView;
import com.github.bloodshura.x.collection.view.XView;
import com.github.bloodshura.x.util.XApi;
import com.github.bloodshura.x.venus.function.annotation.MethodArgs;
import com.github.bloodshura.x.venus.function.annotation.MethodName;
import com.github.bloodshura.x.venus.function.annotation.MethodVarArgs;
import com.github.bloodshura.x.venus.type.PrimitiveType;
import com.github.bloodshura.x.venus.type.Type;
import com.github.bloodshura.x.venus.value.Value;

import javax.annotation.Nonnull;

public abstract class Method implements Function {
	private final XView arguments;
	private final String name;
	private final boolean varArgs;

	public Method() {
		boolean hasMethodArgs = getClass().isAnnotationPresent(MethodArgs.class);
		boolean hasMethodName = getClass().isAnnotationPresent(MethodName.class);
		boolean isMethodVarArgs = getClass().isAnnotationPresent(MethodVarArgs.class);

		XApi.requireState(!hasMethodArgs || (hasMethodArgs != isMethodVarArgs), "Must contain either @MethodArgs or @MethodVarArgs");
		XApi.requireState(hasMethodName, "No @MethodName found");

		if (hasMethodArgs) {
			Class[] args = getClass().getAnnotation(MethodArgs.class).value();

			this.arguments = new XArrayView<>(args).map(PrimitiveType::forType);
		}
		else {
			this.arguments = new XBasicView<>();
		}

		this.name = getClass().getAnnotation(MethodName.class).value();
		this.varArgs = isMethodVarArgs;
	}

	@Override
	public final XView getArgumentTypes() {
		return arguments;
	}

	@Nonnull
	@Override
	public final String getName() {
		return name;
	}

	@Override
	public final boolean isVarArgs() {
		return varArgs;
	}

	@Override
	public final String toString() {
		return "method(" + getName() + ')';
	}
}