| 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 |
| */ |
| 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<>(); |
| |
| 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; |
| } |
| } |