/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package arq.cmdline;
import java.io.PrintStream ;
import java.util.ArrayList ;
import java.util.Collections ;
import java.util.Iterator ;
import java.util.List ;
import org.apache.jena.atlas.io.IndentedWriter ;
public class Usage
{
class Category
{
String desc ;
List<Entry> entries = new ArrayList<>() ;
Category(String desc) { this.desc = desc ; }
}
class Entry
{ String arg; String msg ;
Entry(String arg, String msg) { this.arg = arg ; this.msg = msg ; }
}
List<Category> categories = new ArrayList<>() ;
public Usage()
{
// Start with an unnamed category
startCategory(null) ;
}
public void startCategory(String desc)
{
categories.add(new Category(desc)) ;
}
public void addUsage(String argName, String msg)
{
current().entries.add(new Entry(argName, msg)) ;
}
public void output(PrintStream out)
{
output(new IndentedWriter(out)) ;
}
public void output(IndentedWriter out)
{
int INDENT1 = 2 ;
int INDENT2 = 4 ;
out.incIndent(INDENT1) ;
//for ( Iterator<Category> iter = categories.iterator() ; iter.hasNext() ; )
List<Category> categories2 = new ArrayList<>(categories) ;
Collections.reverse(categories2) ;
for ( Category c : categories2 )
{
if ( c.desc != null )
{
out.println( c.desc );
}
out.incIndent( INDENT2 );
for ( Iterator<Entry> iter2 = c.entries.iterator(); iter2.hasNext(); )
{
Entry e = iter2.next();
out.print( e.arg );
if ( e.msg != null )
{
out.pad( 20 );
out.print( " " );
out.print( e.msg );
}
out.println();
}
out.decIndent( INDENT2 );
}
out.decIndent(INDENT1) ;
out.flush() ;
}
private Category current()
{
return categories.get(categories.size()-1) ;
}
}