/*
 * Copyright (c) 2008 Embedded Brains GmbH and others.
 *
 *   Embedded Brains GmbH
 *   Obere Lagerstr. 30
 *   D-82178 Puchheim
 *   Germany
 *   rtems@embedded-brains.de
 *
 * All rights reserved.  This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License Version 1.0 ("EPL")
 * which accompanies this distribution and is available at
 *
 *   http://www.eclipse.org/legal/epl-v10.html
 *
 * For purposes of the EPL, "Program" will mean the Content.
 *
 * Contributors:
 *
 *   Sebastian Huber (Embedded Brains GmbH) - Initial API and implementation.
 */

package org.rtems.cdt.build;

import org.eclipse.core.resources.IProject;
import org.eclipse.cdt.managedbuilder.core.IConfiguration;
import org.eclipse.cdt.managedbuilder.envvar.IBuildEnvironmentVariable;
import org.eclipse.cdt.managedbuilder.envvar.IConfigurationEnvironmentVariableSupplier;
import org.eclipse.cdt.managedbuilder.envvar.IEnvironmentVariableProvider;
import org.eclipse.cdt.managedbuilder.internal.envvar.BuildEnvVar;
import org.rtems.cdt.Constants;
import org.rtems.cdt.Storage;

public class EnvironmentSupplier implements IConfigurationEnvironmentVariableSupplier {
	private static final int PATH_INDEX = 0;

	private static final int VARIABLE_COUNT = 1;

	protected String getPlatform() {
		return Constants.PLATFORM_DEFAULT;
	}

	public IBuildEnvironmentVariable getVariable(String name, IConfiguration configuration, IEnvironmentVariableProvider provider) {
		if (name.equals("PATH")) {
			IProject project = (IProject) configuration.getOwner();

			// Change platform
			Storage.changePlatform(project, getPlatform());

			// Get path parts
			String part = Storage.getProperty(project, Constants.PATH_PREPEND_KEY);

			return new BuildEnvVar(name, part, IBuildEnvironmentVariable.ENVVAR_PREPEND, Constants.PATH_SEPARATOR);
		}

		return null;
	}

	public IBuildEnvironmentVariable [] getVariables(IConfiguration configuration, IEnvironmentVariableProvider provider) {
		IBuildEnvironmentVariable variables [] = new IBuildEnvironmentVariable [VARIABLE_COUNT];

		variables [PATH_INDEX] = getVariable("PATH", configuration, provider);

		return variables;
	}
}