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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2000-2012 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
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* If you wish your version of this file to be governed by only the CDDL or
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* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
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* holder.
*/
/*
* @(#)StringUtil.java 1.4 06/29/07
*/
package com.sun.messaging.jmq.util;
import java.util.List;
import java.util.ArrayList;
import java.util.StringTokenizer;
import java.util.Properties;
/**
* StringUtil
*/
public class StringUtil {
/**
* Expand property variables a string with the
* corresponding values in a Properties instance. A property
* variable has the form ${some.property}. The variable
* ${/} is shorthand for ${file.separator}. So if the string contains
* ${jmq.varhome}${/}${jmq.instancename}${/}store then it would be
* expanded to something like /var/opt/SUNWjmq/jmqbroker/store
* ${NL} is shorthand for ${line.separator}
*
* If there are no variables in 'str' then you will get back your
* original string.
*
* @param str The string to expand variables in
* @param props The Properties object to extract variables from
*
* @returns A string with all variables expanded
*/
public static String expandVariables(String str, Properties props) {
if (str == null) return str;
String vname, value = null;
int len = str.length();
StringBuffer sbuf = null;
int current, vstart, vend;
current = vstart = vend = 0;
while (current < len) {
// Locate the start of a variable
if ((vstart = str.indexOf('$', current)) == -1) {
if (sbuf != null) {
// No more variables. Copy remainder of string and stop
sbuf.append(str.substring(current, len));
}
break;
}
if (str.charAt(vstart + 1) == '{') {
// We have a variable start. Find the end
if ((vend = str.indexOf('}', vstart + 1)) == -1) {
if (sbuf != null) {
//No end. No more vars. Copy remainder of string and stop
sbuf.append(str.substring(current, len));
}
break;
}
}
// Looks like we are expanding variables. Allocate buffer
// if we haven't already.
if (sbuf == null) {
sbuf = new StringBuffer(2 * len);
}
// ${jmq.home}
// ^ ^-vend
// +- vstart
if (vend > vstart) {
vname = str.substring(vstart + 2, vend);
} else {
// Variable is malformed.
vname = null;
vend = vstart;
}
// Get variable value
if (vname == null) {
value = null;
} else if (vname.equals("/")) {
value = System.getProperty("file.separator");
} else if (vname.equals("NL")) {
value = System.getProperty("line.separator");
} else if (props != null) {
value = props.getProperty(vname);
}
// Copy over stuff before variable
sbuf.append(str.substring(current, vstart));
// Copy variable
if (value == null) {
// No value. Just duplicate variable name and move on
sbuf.append(str.substring(vstart, vend + 1));
} else {
// Good variable. Copy value
sbuf.append(value);
}
// Advance current pointer past variable and continue
current = vend + 1;
}
if (sbuf != null) {
return sbuf.toString();
} else {
// If we never expanded variables we can return the original string
return str;
}
}
/**
* Convert a string of "key1=val1, key2=val2, .." to Properties
*/
public static Properties toProperties(String keyvalPairs) {
return toProperties(keyvalPairs, null);
}
public static Properties toProperties(String keyvalPairs, Properties props) {
return toProperties(keyvalPairs, ",", props);
}
public static Properties toProperties(String keyvalPairs, String separator, Properties p) {
Properties props = p;
if (props == null) props = new Properties();
if (keyvalPairs == null) return props;
List pairs = breakToList(keyvalPairs, separator);
for (String pair : pairs) {
List l = breakToList(pair, "=");
if (l.size() != 2 ) {
throw new IllegalArgumentException("Invalid property element: "+pair);
}
props.setProperty(l.get(0), l.get(1));
}
return props;
}
public static List breakToList(String value, String separator) {
StringTokenizer token = new StringTokenizer(value, separator, false);
List retv = new ArrayList();
while (token.hasMoreElements()) {
String newtoken = token.nextToken();
newtoken = newtoken.trim();
int start = 0;
while (start < newtoken.length()) {
if (!Character.isSpaceChar(newtoken.charAt(start)))
break;
start ++;
}
if (start > 0)
newtoken = newtoken.substring(start+1);
if (newtoken.trim().length() > 0)
retv.add(newtoken.trim());
}
return retv;
}
}
