package org.eclipse.aether.internal.test.util;
   
   /*
    * 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.Collections;
  import java.util.LinkedHashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  /**
   * A definition of a dependency node via a single line of text.
   * 
   * @see DependencyGraphParser
   */
  class NodeDefinition
  {
  
      static final String ID = "\\(([-_a-zA-Z0-9]+)\\)";
  
      static final String IDREF = "\\^([-_a-zA-Z0-9]+)";
  
      static final String COORDS = "([^: \\(]+):([^: ]+)(?::([^: ]*)(?::([^: ]+))?)?:([^: \\[\\(<]+)";
  
      private static final String COORDS_NC = NodeDefinition.COORDS.replaceAll( "\\((?=\\[)", "(?:" );
  
      private static final String RANGE_NC = "[\\(\\[][^\\(\\)\\[\\]]+[\\)\\]]";
  
      static final String RANGE = "(" + RANGE_NC + ")";
  
      static final String SCOPE = "(?:scope\\s*=\\s*)?((?!optional)[-_a-zA-Z0-9]+)(?:<([-_a-zA-Z0-9]+))?";
  
      static final String OPTIONAL = "(!?optional)";
  
      static final String RELOCATIONS = "relocations\\s*=\\s*(" + COORDS_NC + "(?:\\s*,\\s*" + COORDS_NC + ")*)";
  
      static final String KEY_VAL = "(?:[-_a-zA-Z0-9]+)\\s*:\\s*(?:[-_a-zA-Z0-9]*)";
  
      static final String PROPS = "props\\s*=\\s*(" + KEY_VAL + "(?:\\s*,\\s*" + KEY_VAL + ")*)";
  
      static final String COORDSX = "(" + COORDS_NC + ")" + RANGE + "?(?:<((?:" + RANGE_NC + ")|\\S+))?";
  
      static final String NODE = COORDSX + "(?:\\s+" + PROPS + ")?" + "(?:\\s+" + SCOPE + ")?" + "(?:\\s+" + OPTIONAL
          + ")?" + "(?:\\s+" + RELOCATIONS + ")?" + "(?:\\s+" + ID + ")?";
  
      static final String LINE = "(?:" + IDREF + ")|(?:" + NODE + ")";
  
      private static final Pattern PATTERN = Pattern.compile( LINE );
  
      private final String def;
  
      String coords;
  
      Map<String, String> properties;
  
      String range;
  
      String premanagedVersion;
  
      String scope;
  
      String premanagedScope;
  
      Boolean optional;
  
      List<String> relocations;
  
      String id;
  
      String reference;
  
      NodeDefinition( String definition )
      {
          def = definition.trim();
  
          Matcher m = PATTERN.matcher( def );
          if ( !m.matches() )
          {
              throw new IllegalArgumentException( "bad syntax: " + def );
          }
 
         reference = m.group( 1 );
         if ( reference != null )
         {
             return;
         }
 
         coords = m.group( 2 );
         range = m.group( 3 );
         premanagedVersion = m.group( 4 );
 
         String props = m.group( 5 );
         if ( props != null )
         {
             properties = new LinkedHashMap<>();
             for ( String prop : props.split( "\\s*,\\s*" ) )
             {
                 int sep = prop.indexOf( ':' );
                 String key = prop.substring( 0, sep );
                 String val = prop.substring( sep + 1 );
                 properties.put( key, val );
             }
         }
 
         scope = m.group( 6 );
         premanagedScope = m.group( 7 );
         optional = ( m.group( 8 ) != null ) ? !m.group( 8 ).startsWith( "!" ) : Boolean.FALSE;
 
         String relocs = m.group( 9 );
         if ( relocs != null )
         {
             relocations = new ArrayList<>();
             Collections.addAll( relocations, relocs.split( "\\s*,\\s*" ) );
         }
 
         id = m.group( 10 );
     }
 
     @Override
     public String toString()
     {
         return def;
     }
 
 }