GrepCode: java.util.regex.PatternSyntaxException (.java) - Class

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java.util.regex.PatternSyntaxException
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  /*
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   * Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved.
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   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   *
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   * This code is free software; you can redistribute it and/or modify it
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   * under the terms of the GNU General Public License version 2 only, as
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   * published by the Free Software Foundation.  Oracle designates this
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   * particular file as subject to the "Classpath" exception as provided
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   * by Oracle in the LICENSE file that accompanied this code.
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  *
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  * This code is distributed in the hope that it will be useful, but WITHOUT
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  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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  * version 2 for more details (a copy is included in the LICENSE file that
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  * accompanied this code).
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  *
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  * You should have received a copy of the GNU General Public License version
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  * 2 along with this work; if not, write to the Free Software Foundation,
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  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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  *
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  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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  * or visit www.oracle.com if you need additional information or have any
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  * questions.
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  */
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 package java.util.regex;
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 import sun.security.action.GetPropertyAction;


 Unchecked exception thrown to indicate a syntax error in a
 regular-expression pattern.

 
 Author(s):unascribed Since:1.4Spec:JSR-51
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 public class PatternSyntaxException
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     extends IllegalArgumentException
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 {
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     private static final long serialVersionUID = -3864639126226059218L;
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     private final String desc;
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     private final String pattern;
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     private final int index;

    
 Constructs a new instance of this class.

 
 Parameters:desc
         A description of the errorregex
         The erroneous patternindex
         The approximate index in the pattern of the error,
         or -1 if the index is not known
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     public PatternSyntaxException(String desc, String regex, int index) {
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         this.desc = desc;
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         this.pattern = regex;
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         this.index = index;
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     }

    
 Retrieves the error index.

 
 Returns:The approximate index in the pattern of the error,
         or -1 if the index is not known
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     public int getIndex() {
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         return index;
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     }

    
 Retrieves the description of the error.

 
 Returns:The description of the error
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     public String getDescription() {
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         return desc;
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     }

    
 Retrieves the erroneous regular-expression pattern.

 
 Returns:The erroneous pattern
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     public String getPattern() {
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         return pattern;
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     }
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     private static final String nl =
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         java.security.AccessController
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             .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.

 
 Returns:The full detail message
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    public String getMessage() {
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        StringBuffer sb = new StringBuffer();
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        sb.append(desc);
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        if (index >= 0) {
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            sb.append(" near index ");
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            sb.append(index);
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        }
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        sb.append(nl);
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        sb.append(pattern);
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        if (index >= 0) {
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            sb.append(nl);
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            for (int i = 0; i < index; i++) sb.append(' ');
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            sb.append('^');
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        }
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        return sb.toString();
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    }
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}