Copyright (c) 2012, 2013 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) 2012, 2013 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.debug.internal.core.variables;

import java.text.SimpleDateFormat;
import java.util.Date;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.variables.IDynamicVariable;
import org.eclipse.core.variables.IDynamicVariableResolver;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.osgi.util.NLS;

Resolver for the current_date dynamic variable for launch configurations. The optional argument must be a string pattern for SimpleDateFormat. Default pattern is yyyyMMdd_HHmm.
Since:
3.8/**
 * Resolver for the <code>current_date</code> dynamic variable for launch configurations. The optional argument
 * must be a string pattern for {@link SimpleDateFormat}.  Default pattern is <code>yyyyMMdd_HHmm</code>.
 *
 * @since 3.8
 */
public class DateTimeResolver implements IDynamicVariableResolver {

	@Override
	public String resolveValue(IDynamicVariable variable, String argument) throws CoreException {
		SimpleDateFormat format = null;
		if (argument != null && argument.trim().length() > 0){
			try {
				format = new SimpleDateFormat(argument);
			} catch (IllegalArgumentException e){
				DebugPlugin.log(new Status(IStatus.ERROR, DebugPlugin.getUniqueIdentifier(), NLS.bind(Messages.DateTimeResolver_ProblemWithDateArgument, argument), e));
			}
		}

		if (format == null){
			format = new SimpleDateFormat("yyyyMMdd_HHmm"); //$NON-NLS-1$
		}

		return format.format(new Date());
	}

}