package org.apache.maven.doxia.module.twiki.parser;
/*
* 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.
*/
import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.maven.doxia.util.ByLineSource;
import org.apache.maven.doxia.parser.ParseException;
/**
* Parse looking for sections
*
* @author Juan F. Codagnone
* @version $Id: SectionBlockParser.java 1090706 2011-04-09 23:15:28Z hboutemy $
*/
public class SectionBlockParser
implements BlockParser
{
/**
* '---++ Header', '---## Header'
*/
private static final Pattern HEADER_DA = Pattern.compile( "^---([+]+)\\s*(.+)\\s*$" );
/**
* {@link ParagraphBlockParser} to use. injected
*/
private ParagraphBlockParser paraParser;
/**
* {@link ParagraphBlockParser} to use. injected
*/
private HRuleBlockParser hrulerParser;
/** {@link VerbatimBlockParser} */
private VerbatimBlockParser verbatimBlockParser;
/**
* {@inheritDoc}
*/
public final boolean accept( final String line )
{
return HEADER_DA.matcher( line ).lookingAt();
}
/**
* {@inheritDoc}
*/
public final Block visit( final String line, final ByLineSource source )
throws ParseException
{
final Matcher m = HEADER_DA.matcher( line );
if ( !m.lookingAt() )
{
throw new IllegalArgumentException( "don't know how to handle: " + line );
}
String newLine;
final ArrayList<Block> blocks = new ArrayList<Block>();
while ( ( newLine = source.getNextLine() ) != null && !accept( newLine ) )
{
if ( hrulerParser.accept( newLine ) )
{
blocks.add( hrulerParser.visit( newLine, source ) );
}
else
{
if ( verbatimBlockParser.accept( newLine ) )
{
blocks.add( verbatimBlockParser.visit( newLine, source ) );
}
else
{
blocks.add( paraParser.visit( newLine, source ) );
}
}
}
if ( newLine != null )
{
source.ungetLine();
}
return new SectionBlock( m.group( 2 ), getLevel( m.group( 1 ) ), blocks.toArray( new Block[] {} ) );
}
/**
* @param s "++"
* @return tha level of the section
* @throws IllegalArgumentException on error
*/
static int getLevel( final String s )
throws IllegalArgumentException
{
for ( int i = 0, n = s.length(); i < n; i++ )
{
if ( s.charAt( i ) != '+' )
{
throw new IllegalArgumentException( "the argument must have only" + " '+' characters" );
}
}
return s.length();
}
/**
* Sets the paraParser.
*
* @param paraParser <code>ParagraphBlockParser</code> with the paraParser.
*/
public final void setParaParser( final ParagraphBlockParser paraParser )
{
if ( paraParser == null )
{
throw new IllegalArgumentException( "argument can't be null" );
}
this.paraParser = paraParser;
}
/**
* Sets the hrulerParser.
*
* @param hrulerParser <code>HRuleBlockParser</code> with the hrulerParser.
*/
public final void setHrulerParser( final HRuleBlockParser hrulerParser )
{
if ( hrulerParser == null )
{
throw new IllegalArgumentException( "argument can't be null" );
}
this.hrulerParser = hrulerParser;
}
/**
* Sets the verbatimBlockParser.
*
* @param verbatimBlockParser <code>VerbatimBlockParser</code> with the verbatimBlockParser.
* @since 1.1
*/
public final void setVerbatimBlockParser( VerbatimBlockParser verbatimBlockParser )
{
if ( verbatimBlockParser == null )
{
throw new IllegalArgumentException( "argument can't be null" );
}
this.verbatimBlockParser = verbatimBlockParser;
}
}