Copyright (c) 2009, 2015 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) 2009, 2015 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.core.internal.resources;

import org.eclipse.core.internal.utils.Policy;
import org.eclipse.core.resources.IFilterMatcherDescriptor;
import org.eclipse.core.resources.filtermatchers.AbstractFileInfoMatcher;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;

public class FilterDescriptor implements IFilterMatcherDescriptor {
	private String id;
	private String name;
	private String description;
	private String argumentType;
	private boolean isFirst = false;
	private IConfigurationElement element;

	public FilterDescriptor(IConfigurationElement element) {
		this(element, true);
	}

	public FilterDescriptor(IConfigurationElement element, boolean instantiateFactory) {
		id = element.getAttribute("id"); //$NON-NLS-1$
		name = element.getAttribute("name"); //$NON-NLS-1$
		description = element.getAttribute("description"); //$NON-NLS-1$
		argumentType = element.getAttribute("argumentType"); //$NON-NLS-1$
		if (argumentType == null)
			argumentType = IFilterMatcherDescriptor.ARGUMENT_TYPE_NONE;
		this.element = element;
		String ordering = element.getAttribute("ordering"); //$NON-NLS-1$
		if (ordering != null)
			isFirst = ordering.equals("first"); //$NON-NLS-1$
	}

	@Override
	public String getId() {
		return id;
	}

	@Override
	public String getName() {
		return name;
	}

	@Override
	public String getDescription() {
		return description;
	}

	@Override
	public String getArgumentType() {
		return argumentType;
	}

	public AbstractFileInfoMatcher createFilter() {
		try {
			return (AbstractFileInfoMatcher) element.createExecutableExtension("class"); //$NON-NLS-1$
		} catch (CoreException e) {
			Policy.log(e);
			return null;
		}
	}

	@Override
	public boolean isFirstOrdering() {
		return isFirst;
	}
}