package org.apache.maven.toolchain;
   
   /*
    * 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.HashMap;
  import java.util.Iterator;
  import java.util.Map;
  
  import org.apache.maven.toolchain.model.ToolchainModel;
  import org.codehaus.plexus.logging.Logger;
  
  /**
   *
   * @author mkleint
   */
  public abstract class DefaultToolchain
      implements Toolchain, ToolchainPrivate
  {
  
      private String type;
  
      private Map<String, RequirementMatcher> provides = new HashMap<String, RequirementMatcher>();
  
      public static final String KEY_TYPE = "type"; //NOI18N
  
      private ToolchainModel model;
  
      private Logger logger;
  
      protected DefaultToolchain( ToolchainModel model, Logger logger )
      {
          this.model = model;
  
          this.logger = logger;
      }
  
      protected DefaultToolchain( ToolchainModel model, String type, Logger logger )
      {
          this( model, logger );
          this.type = type;
      }
  
      public final String getType()
      {
          return type != null ? type : model.getType();
      }
  
  
      public final ToolchainModel getModel()
      {
          return model;
      }
  
      public final void addProvideToken( String type, RequirementMatcher matcher )
      {
          provides.put( type, matcher );
      }
  
  
      public boolean matchesRequirements( Map requirements )
      {
          Iterator it = requirements.keySet().iterator();
          while ( it.hasNext() )
          {
              String key = (String) it.next();
  
              RequirementMatcher matcher = provides.get( key );
  
              if ( matcher == null )
              {
                  getLog().debug( "Toolchain " + this + " is missing required property: " + key );
                  return false;
              }
              if ( !matcher.matches( (String) requirements.get( key ) ) )
              {
                  getLog().debug( "Toolchain " + this + " doesn't match required property: " + key );
                  return false;
              }
          }
          return true;
      }
  
     protected Logger getLog()
     {
         return logger;
     }
 }