| /* |
| * Copyright (c) 1999, 2008, 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 java.util.regex; |
| |
| import sun.security.action.GetPropertyAction; |
| |
| |
| /** |
| * Unchecked exception thrown to indicate a syntax error in a |
| * regular-expression pattern. |
| * |
| * @author unascribed |
| * @since 1.4 |
| * @spec JSR-51 |
| */ |
| |
| public class PatternSyntaxException |
| extends IllegalArgumentException |
| { |
| private static final long serialVersionUID = -3864639126226059218L; |
| |
| private final String desc; |
| private final String pattern; |
| private final int index; |
| |
| /** |
| * Constructs a new instance of this class. |
| * |
| * @param desc |
| * A description of the error |
| * |
| * @param regex |
| * The erroneous pattern |
| * |
| * @param index |
| * The approximate index in the pattern of the error, |
| * or {@code -1} if the index is not known |
| */ |
| public PatternSyntaxException(String desc, String regex, int index) { |
| this.desc = desc; |
| this.pattern = regex; |
| this.index = index; |
| } |
| |
| /** |
| * Retrieves the error index. |
| * |
| * @return The approximate index in the pattern of the error, |
| * or {@code -1} if the index is not known |
| */ |
| public int getIndex() { |
| return index; |
| } |
| |
| /** |
| * Retrieves the description of the error. |
| * |
| * @return The description of the error |
| */ |
| public String getDescription() { |
| return desc; |
| } |
| |
| /** |
| * Retrieves the erroneous regular-expression pattern. |
| * |
| * @return The erroneous pattern |
| */ |
| public String getPattern() { |
| return pattern; |
| } |
| |
| private static final String nl = |
| java.security.AccessController |
| .doPrivileged(new GetPropertyAction("line.separator")); |
| |
| /** |
| * Returns a multi-line string containing the description of the syntax |
| * error and its index, the erroneous regular-expression pattern, and a |
| * visual indication of the error index within the pattern. |
| * |
| * @return The full detail message |
| */ |
| public String getMessage() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append(desc); |
| if (index >= 0) { |
| sb.append(" near index "); |
| sb.append(index); |
| } |
| sb.append(nl); |
| sb.append(pattern); |
| if (index >= 0) { |
| sb.append(nl); |
| for (int i = 0; i < index; i++) sb.append(' '); |
| sb.append('^'); |
| } |
| return sb.toString(); |
| } |
| |
| } |