Copyright (c) 2000, 2016 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
    Mickael Istria (Red Hat Inc.) - Bug 488937
/*******************************************************************************
 * Copyright (c) 2000, 2016 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
 *     Mickael Istria (Red Hat Inc.) - Bug 488937
 *******************************************************************************/
package org.eclipse.core.internal.resources;

import java.io.DataInputStream;
import java.io.IOException;
import org.eclipse.core.internal.utils.Messages;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.osgi.util.NLS;

This class is used to read markers from disk. Subclasses implement
version specific reading code.
/**
 * This class is used to read markers from disk. Subclasses implement
 * version specific reading code.
 */
public class MarkerReader {
	protected Workspace workspace;

	public MarkerReader(Workspace workspace) {
		super();
		this.workspace = workspace;
	}

	
Returns the appropriate reader for the given version.
/**
	 * Returns the appropriate reader for the given version.
	 */
	protected MarkerReader getReader(int formatVersion) throws IOException {
		switch (formatVersion) {
			case 1 :
				return new MarkerReader_1(workspace);
			case 2 :
				return new MarkerReader_2(workspace);
			case 3 :
				return new MarkerReader_3(workspace);
			default :
				throw new IOException(NLS.bind(Messages.resources_format, formatVersion));
		}
	}

	public void read(DataInputStream input, boolean generateDeltas) throws IOException, CoreException {
		int formatVersion = readVersionNumber(input);
		MarkerReader reader = getReader(formatVersion);
		reader.read(input, generateDeltas);
	}

	protected static int readVersionNumber(DataInputStream input) throws IOException {
		return input.readInt();
	}
}