/*
 * Copyright 2009-2010 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.lisp.net;

import java.io.IOException;
import java.net.UnknownHostException;

import net.morilib.lisp.Datum;
import net.morilib.lisp.Environment;
import net.morilib.lisp.LispMessage;
import net.morilib.lisp.LispSmallInt;
import net.morilib.lisp.LispString;
import net.morilib.lisp.subr.BinaryArgs;

/**
 *
 *
 * @author MORIGUCHI, Yuichiro 2011/02/13
 */
public class MakeSocket extends BinaryArgs {

	/* (non-Javadoc)
	 * @see net.morilib.lisp.subr.BinaryArgs#execute(net.morilib.lisp.Datum, net.morilib.lisp.Datum, net.morilib.lisp.Environment, net.morilib.lisp.LispMessage)
	 */
	@Override
	protected Datum execute(
			Datum c1a, Datum c2a, Environment env,
			LispMessage mesg) {
		if(!(c2a instanceof LispSmallInt)) {
			throw mesg.getError("err.require.smallint", c2a);
		}

		try {
			if(c1a instanceof LispString) {
				return new LispSocket(c1a.getString(), c2a.getInt());
			} else if(c1a instanceof LispInetAddress) {
				return new LispSocket(
						((LispInetAddress)c1a), c2a.getInt());
			} else {
				throw mesg.getError(
						"err.net.require.hostnameoraddress", c1a);
			}
		} catch (UnknownHostException e) {
			throw mesg.getError("err.net.unknownhost");
		} catch (IOException e) {
			throw mesg.getError("err.io");
		}
	}

}
