1 /*

     2  * Copyright (c) 2003, 2009, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package build.tools.logutil;

    27 

    28 import java.io.PrintWriter ;

    29 import java.io.Writer ;

    30 import java.io.OutputStream ;

    31 import java.io.BufferedWriter ;

    32 import java.io.OutputStreamWriter ;

    33 import java.util.StringTokenizer ;

    34 

    35 public class IndentingPrintWriter extends PrintWriter {

    36     private int level = 0 ;

    37     private int indentWidth = 4 ;

    38     private String indentString = "" ;

    39 

    40     public void printMsg( String msg, Object... data )

    41     {

    42         // System.out.println( "printMsg called with msg=" + msg + " data=" + data ) ;

    43         StringTokenizer st = new StringTokenizer( msg, "@", true ) ;

    44         StringBuffer result = new StringBuffer() ;

    45         String token = null ;

    46         int pos = 0;

    47 

    48         while (st.hasMoreTokens()) {

    49             token = st.nextToken() ;

    50             if (token.equals("@")) {

    51                 if (pos < data.length) {

    52                     result.append( data[pos] );

    53                     ++pos;

    54                 } else {

    55                     throw new Error( "List too short for message" ) ;

    56                 }

    57             } else {

    58                 result.append( token ) ;

    59             }

    60         }

    61 

    62         // System.out.println( "Printing result " + result + " to file" ) ;

    63         print( result ) ;

    64         println() ;

    65     }

    66 

    67     public IndentingPrintWriter (Writer out) {

    68         super( out, true ) ;

    69         // System.out.println( "Constructing a new IndentingPrintWriter with Writer " + out ) ;

    70     }

    71 

    72     public IndentingPrintWriter(Writer out, boolean autoFlush) {

    73         super( out, autoFlush ) ;

    74         // System.out.println( "Constructing a new IndentingPrintWriter with Writer " + out ) ;

    75     }

    76 

    77     public IndentingPrintWriter(OutputStream out) {

    78         super(out, true);

    79         // System.out.println( "Constructing a new IndentingPrintWriter with OutputStream " + out ) ;

    80     }

    81 

    82     public IndentingPrintWriter(OutputStream out, boolean autoFlush) {

    83         super(new BufferedWriter(new OutputStreamWriter(out)), autoFlush);

    84         // System.out.println( "Constructing a new IndentingPrintWriter with OutputStream " + out ) ;

    85     }

    86 

    87     public void setIndentWidth( int indentWidth )

    88     {

    89         this.indentWidth = indentWidth ;

    90         updateIndentString() ;

    91     }

    92 

    93     public void indent()

    94     {

    95         level++ ;

    96         updateIndentString() ;

    97     }

    98 

    99     public void undent()

   100     {

   101         if (level > 0) {

   102             level-- ;

   103             updateIndentString() ;

   104         }

   105     }

   106 

   107     private void updateIndentString()

   108     {

   109         int size = level * indentWidth ;

   110         StringBuffer sbuf = new StringBuffer( size ) ;

   111         for (int ctr = 0; ctr<size; ctr++ )

   112             sbuf.append( " " ) ;

   113         indentString = sbuf.toString() ;

   114     }

   115 

   116     // overridden from PrintWriter

   117     public void println()

   118     {

   119         super.println() ;

   120 

   121         print( indentString ) ;

   122     }

   123 }