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   *  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
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  package org.apache.cayenne.project;
  
  import java.net.URL;
  import java.util.Collection;
  import java.util.HashSet;
  
  import org.apache.cayenne.configuration.ConfigurationNode;
  import org.apache.cayenne.configuration.ConfigurationNodeVisitor;
  import org.apache.cayenne.configuration.ConfigurationTree;
  import org.apache.cayenne.resource.Resource;
  
  /**
   * A model of a Cayenne mapping project. A project consists of descriptors for
   * DataChannel, DataNodes and DataMaps and associated filesystem files they are
   * loaded from and saved to.
   * 
   * @since 3.1
   */
  public class Project {
  
  	/**
  	 * Current version of Cayenne project.
  	 * Used by different parsers and savers of project's XML files.
  	 *
  	 * @since 4.1
  	 */
  	static public final int VERSION = 11;
  
  	protected boolean modified;
  
  	protected ConfigurationTree<?> configurationTree;
  	private ConfigurationNodeVisitor<Resource> configurationSourceGetter;
  	private Collection<URL> unusedResources;
  
  	public Project(ConfigurationTree<?> configurationTree) {
  		this.configurationTree = configurationTree;
  		this.configurationSourceGetter = new ConfigurationSourceGetter();
  		this.unusedResources = new HashSet<>();
  	}
  
  	public ConfigurationTree<?> getConfigurationTree() {
  		return configurationTree;
  	}
  
  	public ConfigurationNode getRootNode() {
  		return configurationTree.getRootNode();
  	}
  
  	/**
  	 * Returns <code>true</code> if the project is modified.
  	 */
  	public boolean isModified() {
  		return modified;
  	}
  
  	/**
  	 * Updates "modified" state of the project.
  	 */
  	public void setModified(boolean modified) {
  		this.modified = modified;
  	}
  
  	public Resource getConfigurationResource(ConfigurationNode configNode) {
  		return configNode.acceptVisitor(configurationSourceGetter);
  	}
  
  	public Resource getConfigurationResource() {
  		return configurationTree.getRootNode().acceptVisitor(configurationSourceGetter);
  	}
  
  	public Collection<URL> getUnusedResources() {
  		return unusedResources;
  	}
  }
  