Copyright (c) 2000, 2017 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2000, 2017 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.team.internal.core;

import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;

import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtension;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.Platform;
import org.eclipse.team.core.Team;

/**
 *
 */
public class PluginStringMappings {

	private final String fExtensionID;
	private final String fAttributeName;

	private SortedMap<String, Integer> fMappings;

	public PluginStringMappings(String extensionID, String stringAttributeName) {
		fExtensionID= extensionID;
		fAttributeName= stringAttributeName;
	}

	
Load all the extension patterns contributed by plugins.
Returns:
a map with the patterns/**
	 * Load all the extension patterns contributed by plugins.
	 * @return a map with the patterns
	 */
	private SortedMap<String, Integer> loadPluginPatterns() {

		final SortedMap<String, Integer> result= new TreeMap<>();

		final TeamPlugin plugin = TeamPlugin.getPlugin();
		if (plugin == null)
			return result;

		final IExtensionPoint extension = Platform.getExtensionRegistry().getExtensionPoint(TeamPlugin.ID, fExtensionID);//TeamPlugin.FILE_TYPES_EXTENSION);
		if (extension == null)
			return result;

		final IExtension[] extensions =  extension.getExtensions();

		for (IExtension e : extensions) {
			IConfigurationElement[] configElements = e.getConfigurationElements();
			for (IConfigurationElement configElement : configElements) {
				final String ext = configElement.getAttribute(fAttributeName); //"extension");
				final String type = configElement.getAttribute("type"); //$NON-NLS-1$
				if (ext == null || type == null)
					continue;
				if (type.equals("text")) { //$NON-NLS-1$
					result.put(ext, Integer.valueOf(Team.TEXT));
				} else if (type.equals("binary")) { //$NON-NLS-1$
					result.put(ext, Integer.valueOf(Team.BINARY));
				}
			}
		}
		return result;
	}

	public Map<String, Integer> referenceMap() {
		if (fMappings == null) {
			fMappings= loadPluginPatterns();
		}
		return fMappings;
	}

	public int getType(String filename) {
		final Map<String, Integer> mappings= referenceMap();
		return mappings.containsKey(filename) ? mappings.get(filename).intValue() : Team.UNKNOWN;
	}
}