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.List;
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 tables
*
* @author Juan F. Codagnone
* @version $Id: TableBlockParser.java 1090706 2011-04-09 23:15:28Z hboutemy $
*/
public class TableBlockParser
implements BlockParser
{
/**
* pattern to detect tables
*/
private static final Pattern TABLE_PATTERN = Pattern.compile( "^\\s*([|].*[|])+\\s*$" );
/**
* text parser
*/
private FormatedTextParser textParser;
/** {@inheritDoc} */
public final boolean accept( final String line )
{
return TABLE_PATTERN.matcher( line ).lookingAt();
}
/**
* {@inheritDoc}
*/
public final Block visit( final String line, final ByLineSource source )
throws ParseException
{
if ( !accept( line ) )
{
throw new IllegalAccessError( "call accept before this ;)" );
}
final List<Block> rows = new ArrayList<Block>();
String l = line;
do
{
final Matcher m = TABLE_PATTERN.matcher( l );
if ( m.lookingAt() )
{
final List<Block> cells = new ArrayList<Block>();
/* for each cell... */
for ( int lh = l.indexOf( '|' ) + 1, rh; ( rh = l.indexOf( '|', lh ) ) != -1; lh = rh + 1 )
{
final Block[] bs = textParser.parse( l.substring( lh, rh ).trim() );
if ( bs.length == 1 && bs[0] instanceof BoldBlock )
{
final Block[] tmp = ( (BoldBlock) bs[0] ).getBlocks();
cells.add( new TableCellHeaderBlock( tmp ) );
}
else
{
cells.add( new TableCellBlock( bs ) );
}
}
rows.add( new TableRowBlock( (Block[]) cells.toArray( new Block[] {} ) ) );
}
}
while ( ( l = source.getNextLine() ) != null && accept( l ) );
assert rows.size() >= 1;
return new TableBlock( rows.toArray( new Block[] {} ) );
}
/**
* <p>Setter for the field <code>textParser</code>.</p>
*
* @param textParser text parser to be set
*/
public final void setTextParser( final FormatedTextParser textParser )
{
if ( textParser == null )
{
throw new IllegalArgumentException( "argument can't be null" );
}
this.textParser = textParser;
}
}