/*******************************************************************************
 * Copyright (c) 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
/*
 *  $RCSfile: PDEProcessForPlugin.java,v $
 *  $Revision: 1.5 $  $Date: 2005/05/11 17:35:24 $ 
 */
package org.eclipse.jem.internal.proxy.core;

import java.util.Map;

import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.pde.core.plugin.*;
import org.eclipse.pde.internal.core.PDECore;
 

/*
 * Used for PDE Processing for the Proxy Plugin class. It will be optionally loaded
 * if PDE plugin is installed. This allows usage in an installation that doesn't have
 * PDE installed.
 * 
 * @since 1.0.2
 */
class PDEProcessForPlugin implements ProxyPlugin.IPDEProcessForPlugin {

	/*
	 *  (non-Javadoc)
	 * @see org.eclipse.jem.internal.proxy.core.ProxyPlugin.IPDEProcessForPlugin#processPlugin(org.eclipse.jdt.core.IJavaProject, java.util.Map, boolean, boolean)
	 */
	public void findPlugins(IJavaProject project, Map pluginIds, boolean visible, boolean first) {
		IPluginModelBase m = PDECore.getDefault().getModelManager().findModel(project.getProject());
		if (m instanceof IPluginModel) {
			// it is a plugin, process it.
			IPlugin plugin = ((IPluginModel) m).getPlugin();			
			if (pluginIds.containsKey(plugin.getId()))
				return;	// already processed it
			pluginIds.put(plugin.getId(), first || visible ? Boolean.TRUE : Boolean.FALSE);			
			expandPlugin(plugin, pluginIds, visible, first);
		}
		return;
	}
	
	private void expandPlugin(IPlugin plugin, Map pluginIds, boolean visible, boolean first) {
		IPluginImport[] imports = plugin.getImports();
		for (int i = 0; i < imports.length; i++) {
			IPluginImport pi = imports[i];
			Boolean piValue = (Boolean) pluginIds.get(pi.getId());
			boolean importVisible = first || (visible && pi.isReexported());
			if (piValue != null && (!importVisible || piValue.booleanValue()))
				continue;	// we already processed it, this time not visible, or this time visible and was previously visible.
			// Now either first time, or it was there before, but now visible, but this time it is visible.
			// We want it to become visible in that case. 
			pluginIds.put(pi.getId(), importVisible ? Boolean.TRUE : Boolean.FALSE);			
			IPlugin pb = PDECore.getDefault().findPlugin(pi.getId(),
				pi.getVersion(),
				pi.getMatch());
			if (pb != null)
				expandPlugin(pb, pluginIds, importVisible, false);
		}
	}
}