/**
* 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.ambari.server.topology;
/**
* Component cardinality representation.
*/
public class Cardinality {
String cardinality;
int min = 0;
int max = Integer.MAX_VALUE;
int exact = -1;
boolean isAll = false;
public Cardinality(String cardinality) {
this.cardinality = cardinality;
if (cardinality != null && ! cardinality.isEmpty()) {
if (cardinality.contains("+")) {
min = Integer.valueOf(cardinality.split("\\+")[0]);
} else if (cardinality.contains("-")) {
String[] toks = cardinality.split("-");
min = Integer.parseInt(toks[0]);
max = Integer.parseInt(toks[1]);
} else if (cardinality.equals("ALL")) {
isAll = true;
} else {
exact = Integer.parseInt(cardinality);
}
}
}
/**
* Determine if component is required for all host groups.
*
* @return true if cardinality is 'ALL', false otherwise
*/
public boolean isAll() {
return isAll;
}
/**
* Determine if the given count satisfies the required cardinality.
*
* @param count number of host groups containing component
*
* @return true id count satisfies the required cardinality, false otherwise
*/
public boolean isValidCount(int count) {
if (isAll) {
return false;
} else if (exact != -1) {
return count == exact;
} else return count >= min && count <= max;
}
/**
* Determine if the cardinality count supports auto-deployment.
* This determination is independent of whether the component is configured
* to be auto-deployed. This only indicates whether auto-deployment is
* supported for the current cardinality.
*
* At this time, only cardinalities of ALL or where a count of 1 is valid are
* supported.
*
* @return true if cardinality supports auto-deployment
*/
public boolean supportsAutoDeploy() {
return isValidCount(1) || isAll;
}
public String getValue() {
return cardinality;
}
}