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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.tuscany.sca.binding.erlang.impl;
import com.ericsson.otp.erlang.OtpErlangAtom;
import com.ericsson.otp.erlang.OtpErlangList;
import com.ericsson.otp.erlang.OtpErlangObject;
import com.ericsson.otp.erlang.OtpErlangPid;
import com.ericsson.otp.erlang.OtpErlangRef;
import com.ericsson.otp.erlang.OtpErlangTuple;
/**
* @version $Rev$ $Date$
*/
public class MessageHelper {
/**
* Mbox name used for Remote Procedure Calls
*/
public static String RPC_MBOX = "rex";
public static final OtpErlangAtom ATOM_OK = new OtpErlangAtom("ok");
public static final OtpErlangAtom ATOM_ERROR = new OtpErlangAtom("error");
public static final OtpErlangAtom ATOM_BADRPC = new OtpErlangAtom("badrpc");
private static final OtpErlangAtom ATOM_EXIT = new OtpErlangAtom("EXIT");
private static final OtpErlangAtom ATOM_UNDEF = new OtpErlangAtom("undef");
private static final OtpErlangAtom ATOM_CALL = new OtpErlangAtom("call");
private static final OtpErlangAtom ATOM_GEN_CALL = new OtpErlangAtom(
"$gen_call");
public static OtpErlangObject functionUndefMessage(String module,
String function, OtpErlangList args, String tuscanyMsg) {
OtpErlangObject[] args4 = new OtpErlangObject[3];
args4[0] = new OtpErlangAtom(module);
args4[1] = new OtpErlangAtom(function);
args4[2] = args;
OtpErlangObject[] args3 = new OtpErlangObject[2];
args3[0] = new OtpErlangTuple(args4);
args3[1] = new OtpErlangAtom(tuscanyMsg);
OtpErlangObject[] args2 = new OtpErlangObject[2];
args2[0] = ATOM_UNDEF;
args2[1] = new OtpErlangList(args3);
OtpErlangObject[] args1 = new OtpErlangObject[2];
args1[0] = ATOM_EXIT;
args1[1] = new OtpErlangTuple(args2);
OtpErlangTuple result = new OtpErlangTuple(args1);
return result;
}
public static boolean isfunctionUndefMessage(OtpErlangObject msg) {
if (msg.getClass().equals(OtpErlangTuple.class)) {
OtpErlangTuple tupleMsg = (OtpErlangTuple) msg;
if (tupleMsg.arity() == 2
&& tupleMsg.elementAt(0).getClass().equals(
OtpErlangAtom.class)
&& tupleMsg.elementAt(1).getClass().equals(
OtpErlangTuple.class)
&& ((OtpErlangAtom) tupleMsg.elementAt(0)).atomValue()
.equals(ATOM_BADRPC.atomValue())) {
OtpErlangTuple badrpcTuple = (OtpErlangTuple) tupleMsg
.elementAt(1);
if (badrpcTuple.arity() == 2
&& badrpcTuple.elementAt(0).getClass().equals(
OtpErlangAtom.class)
&& badrpcTuple.elementAt(1).getClass().equals(
OtpErlangTuple.class)
&& ((OtpErlangAtom) badrpcTuple.elementAt(0))
.atomValue().equals(ATOM_EXIT.atomValue())) {
OtpErlangTuple exitTuple = (OtpErlangTuple) badrpcTuple
.elementAt(1);
if (exitTuple.arity() == 2
&& exitTuple.elementAt(0).getClass().equals(
OtpErlangAtom.class)
&& ((OtpErlangAtom) exitTuple.elementAt(0))
.atomValue().equals(ATOM_UNDEF.atomValue())) {
return true;
}
}
}
}
return false;
}
public static OtpErlangTuple rpcMessage(OtpErlangPid senderPid,
OtpErlangRef ref, String module, String function, OtpErlangList args) {
OtpErlangObject[] args3 = new OtpErlangObject[5];
args3[0] = ATOM_CALL;
args3[1] = new OtpErlangAtom(module);
args3[2] = new OtpErlangAtom(function);
args3[3] = args;
args3[4] = senderPid;
OtpErlangObject[] args2 = new OtpErlangObject[2];
args2[0] = senderPid;
args2[1] = ref;
OtpErlangObject[] args1 = new OtpErlangObject[3];
args1[0] = ATOM_GEN_CALL;
args1[1] = new OtpErlangTuple(args2);
args1[2] = new OtpErlangTuple(args3);
OtpErlangTuple result = new OtpErlangTuple(args1);
return result;
}
}
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