/*
 * Copyright 2013 Yuichiro Moriguchi
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.morilib.awk.builtin;

import java.util.List;

import net.morilib.awk.io.AwkFiles;
import net.morilib.awk.namespace.AwkNamespace;
import net.morilib.awk.value.AwkFunction;
import net.morilib.awk.value.AwkUndefined;
import net.morilib.awk.value.AwkValue;

public abstract class AwkUnaryArgs extends AwkFunction {

	/**
	 * 
	 * @param name
	 */
	protected AwkUnaryArgs(String name) {
		super(name, null);
	}

	/**
	 * 
	 * @param ns
	 * @param o
	 * @param a1
	 * @return
	 */
	public abstract AwkValue apply(AwkNamespace ns, AwkFiles o,
			AwkValue a1);

	@Override
	public AwkValue apply(AwkNamespace ns, AwkFiles o,
			List<AwkValue> args) {
		AwkValue v1;

		v1 = args.size() < 1 ? AwkUndefined.UNDEF : args.get(0);
		return apply(ns, o, v1);
	}

}
