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1
50 package org.apache.avalon.excalibur.cli;
51
52
61 public final class CLUtil
62 {
63 private static final int MAX_DESCRIPTION_COLUMN_LENGTH = 60;
64
65
72 public static final StringBuffer  describeOptions( final CLOptionDescriptor[] options )
73 {
74 final String lSep = System.getProperty( "line.separator" );
75 final StringBuffer sb = new StringBuffer ();
76
77 for( int i = 0; i < options.length; i++ )
78 {
79 final char ch = (char)options[ i ].getId();
80 final String name = options[ i ].getName();
81 String description = options[ i ].getDescription();
82 int flags = options[ i ].getFlags();
83 boolean argumentRequired =
84 ( ( flags & CLOptionDescriptor.ARGUMENT_REQUIRED ) ==
85 CLOptionDescriptor.ARGUMENT_REQUIRED );
86 boolean twoArgumentsRequired =
87 ( ( flags & CLOptionDescriptor.ARGUMENTS_REQUIRED_2 ) ==
88 CLOptionDescriptor.ARGUMENTS_REQUIRED_2 );
89 boolean needComma = false;
90 if( twoArgumentsRequired )
91 {
92 argumentRequired = true;
93 }
94
95 sb.append( '\t' );
96
97 if( Character.isLetter( ch ) )
98 {
99 sb.append( "-" );
100 sb.append( ch );
101 needComma = true;
102 }
103
104 if( null != name )
105 {
106 if( needComma )
107 {
108 sb.append( ", " );
109 }
110
111 sb.append( "--" );
112 sb.append( name );
113 }
114
115 if( argumentRequired )
116 {
117 sb.append( " <argument>" );
118 }
119 if( twoArgumentsRequired )
120 {
121 sb.append( "=<value>" );
122 }
123 sb.append( lSep );
124
125 if( null != description )
126 {
127 while( description.length() > MAX_DESCRIPTION_COLUMN_LENGTH )
128 {
129 final String descriptionPart =
130 description.substring( 0, MAX_DESCRIPTION_COLUMN_LENGTH );
131 description =
132 description.substring( MAX_DESCRIPTION_COLUMN_LENGTH );
133 sb.append( "\t\t" );
134 sb.append( descriptionPart );
135 sb.append( lSep );
136 }
137
138 sb.append( "\t\t" );
139 sb.append( description );
140 sb.append( lSep );
141 }
142 }
143 return sb;
144 }
145
146
150 private CLUtil()
151 {
152 }
153 }
154 |
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