| /* |
| * Copyright (c) 1998, 2004, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.security.util; |
| |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.security.GeneralSecurityException; |
| |
| /** |
| * A utility class to expand properties embedded in a string. |
| * Strings of the form ${some.property.name} are expanded to |
| * be the value of the property. Also, the special ${/} property |
| * is expanded to be the same as file.separator. If a property |
| * is not set, a GeneralSecurityException will be thrown. |
| * |
| * @author Roland Schemers |
| */ |
| public class PropertyExpander { |
| |
| |
| public static class ExpandException extends GeneralSecurityException { |
| |
| private static final long serialVersionUID = -7941948581406161702L; |
| |
| public ExpandException(String msg) { |
| super(msg); |
| } |
| } |
| |
| public static String expand(String value) |
| throws ExpandException |
| { |
| return expand(value, false); |
| } |
| |
| public static String expand(String value, boolean encodeURL) |
| throws ExpandException |
| { |
| if (value == null) |
| return null; |
| |
| int p = value.indexOf("${", 0); |
| |
| // no special characters |
| if (p == -1) return value; |
| |
| StringBuilder sb = new StringBuilder(value.length()); |
| int max = value.length(); |
| int i = 0; // index of last character we copied |
| |
| scanner: |
| while (p < max) { |
| if (p > i) { |
| // copy in anything before the special stuff |
| sb.append(value.substring(i, p)); |
| i = p; |
| } |
| int pe = p+2; |
| |
| // do not expand ${{ ... }} |
| if (pe < max && value.charAt(pe) == '{') { |
| pe = value.indexOf("}}", pe); |
| if (pe == -1 || pe+2 == max) { |
| // append remaining chars |
| sb.append(value.substring(p)); |
| break scanner; |
| } else { |
| // append as normal text |
| pe++; |
| sb.append(value.substring(p, pe+1)); |
| } |
| } else { |
| while ((pe < max) && (value.charAt(pe) != '}')) { |
| pe++; |
| } |
| if (pe == max) { |
| // no matching '}' found, just add in as normal text |
| sb.append(value.substring(p, pe)); |
| break scanner; |
| } |
| String prop = value.substring(p+2, pe); |
| if (prop.equals("/")) { |
| sb.append(java.io.File.separatorChar); |
| } else { |
| String val = System.getProperty(prop); |
| if (val != null) { |
| if (encodeURL) { |
| // encode 'val' unless it's an absolute URI |
| // at the beginning of the string buffer |
| try { |
| if (sb.length() > 0 || |
| !(new URI(val)).isAbsolute()) { |
| val = sun.net.www.ParseUtil.encodePath(val); |
| } |
| } catch (URISyntaxException use) { |
| val = sun.net.www.ParseUtil.encodePath(val); |
| } |
| } |
| sb.append(val); |
| } else { |
| throw new ExpandException( |
| "unable to expand property " + |
| prop); |
| } |
| } |
| } |
| i = pe+1; |
| p = value.indexOf("${", i); |
| if (p == -1) { |
| // no more to expand. copy in any extra |
| if (i < max) { |
| sb.append(value.substring(i, max)); |
| } |
| // break out of loop |
| break scanner; |
| } |
| } |
| return sb.toString(); |
| } |
| } |