/*
* Copyright 2009 Red Hat, Inc.
*
* Red Hat 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.jboss.netty.util.internal;
import java.util.ArrayList;
import java.util.List;
/**
* Conversion utility class to parse a property represented as a string or
* an object.
*
* @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
* @author <a href="http://gleamynode.net/">Trustin Lee</a>
*
* @version $Rev: 2080 $, $Date: 2010-01-26 18:04:19 +0900 (Tue, 26 Jan 2010) $
*
*/
public class ConversionUtil {
/**
* Converts the specified object into an integer.
*/
public static int toInt(Object value) {
if (value instanceof Number) {
return ((Number) value).intValue();
} else {
return Integer.parseInt(String.valueOf(value));
}
}
/**
* Converts the specified object into a boolean.
*/
public static boolean toBoolean(Object value) {
if (value instanceof Boolean) {
return ((Boolean) value).booleanValue();
}
if (value instanceof Number) {
return ((Number) value).intValue() != 0;
} else {
String s = String.valueOf(value);
if (s.length() == 0) {
return false;
}
try {
return Integer.parseInt(s) != 0;
} catch (NumberFormatException e) {
// Proceed
}
switch (Character.toUpperCase(s.charAt(0))) {
case 'T': case 'Y':
return true;
}
return false;
}
}
/**
* Converts the specified object into an array of strings.
*/
public static String[] toStringArray(Object value) {
if (value instanceof String[]) {
return (String[]) value;
}
if (value instanceof Iterable<?>) {
List<String> answer = new ArrayList<String>();
for (Object v: (Iterable<?>) value) {
if (v == null) {
answer.add(null);
} else {
answer.add(String.valueOf(v));
}
}
return answer.toArray(new String[answer.size()]);
}
return String.valueOf(value).split("[, \\t\\n\\r\\f\\e\\a]");
}
private static final String[] INTEGERS = {
"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
"10","11","12","13","14","15",
};
public static String toString(int value) {
if (value >= 0 && value < INTEGERS.length) {
return INTEGERS[value];
} else {
return Integer.toString(value);
}
}
private ConversionUtil() {
// Unused
}
}