/*
* Copyright 2008 the original author or authors.
*
* 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 org.rioproject.associations;
/**
* The {@code AssociationType} defines the different types of an {@code Association}.
* An {@code AssociationType} may be either:
* <ul>
* <li><b><u>Uses</u> </b> <br>
* A weak association relationship where if A uses B exists then, then B may be
* present for A
* <li><b><u>Requires</u> </b> <br>
* A stronger association relationship where if A requires B exists then B must
* be present for A
* <li><b><u>Colocated</u> </b> <br>
* An association which requires that A be colocated with B in the same
* JVM. If B does not exist, or cannot be located, A shall not be created
* without B
* <li><b><u>Opposed</u> </b> <br>
* An association which requires that A exist in a different JVM then B.
* <li><b><u>Isolated</u> </b> <br>
* An association which requires that A exist in a different machine then B.
* </ul>
*
* @author Dennis Reedy
*/
public enum AssociationType {
USES, REQUIRES, COLOCATED, OPPOSED, ISOLATED;
@Override
public String toString() {
String s;
switch(this) {
case REQUIRES:
s = "requires";
break;
case COLOCATED:
s = "colocated";
break;
case OPPOSED:
s = "opposed";
break;
case ISOLATED:
s = "isolated";
break;
default:
s = "uses";
}
return "AssociationType="+s;
}
}