/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.elasticsearch.common.transport;
import org.elasticsearch.common.trove.list.array.TIntArrayList;
import java.util.StringTokenizer;
/**
* @author kimchy (Shay Banon)
*/
public class PortsRange {
private final String portRange;
public PortsRange(String portRange) {
this.portRange = portRange;
}
public int[] ports() throws NumberFormatException {
final TIntArrayList ports = new TIntArrayList();
iterate(new PortCallback() {
@Override public boolean onPortNumber(int portNumber) {
ports.add(portNumber);
return false;
}
});
return ports.toArray(new int[ports.size()]);
}
public boolean iterate(PortCallback callback) throws NumberFormatException {
StringTokenizer st = new StringTokenizer(portRange, ",");
boolean success = false;
while (st.hasMoreTokens() && !success) {
String portToken = st.nextToken().trim();
int index = portToken.indexOf('-');
if (index == -1) {
int portNumber = Integer.parseInt(portToken.trim());
success = callback.onPortNumber(portNumber);
if (success) {
break;
}
} else {
int startPort = Integer.parseInt(portToken.substring(0, index).trim());
int endPort = Integer.parseInt(portToken.substring(index + 1).trim());
if (endPort < startPort) {
throw new IllegalArgumentException("Start port [" + startPort + "] must be greater than end port [" + endPort + "]");
}
for (int i = startPort; i <= endPort; i++) {
success = callback.onPortNumber(i);
if (success) {
break;
}
}
}
}
return success;
}
public static interface PortCallback {
boolean onPortNumber(int portNumber);
}
}