Copyright (c) 2000, 2006 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, 2006 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.localstore;

import java.io.*;

Given a target and a temporary locations, it tries to read the contents
from the target. If a file does not exist at the target location, it tries
to read the contents from the temporary location.
See Also:
SafeFileOutputStream/**
 * Given a target and a temporary locations, it tries to read the contents
 * from the target. If a file does not exist at the target location, it tries
 * to read the contents from the temporary location.
 *
 * @see SafeFileOutputStream
 */
public class SafeFileInputStream extends FilterInputStream {
	protected static final String EXTENSION = ".bak"; //$NON-NLS-1$
	private static final int DEFAUT_BUFFER_SIZE = 2048;

	public SafeFileInputStream(File file) throws IOException {
		this(file.getAbsolutePath(), null);
	}

	
If targetPath is null, the file will be created in the default-temporary directory.
/**
	 * If targetPath is null, the file will be created in the default-temporary directory.
	 */
	public SafeFileInputStream(String targetPath, String tempPath) throws IOException {
		super(getInputStream(targetPath, tempPath, DEFAUT_BUFFER_SIZE));
	}

	
If targetPath is null, the file will be created in the default-temporary directory.
/**
	 * If targetPath is null, the file will be created in the default-temporary directory.
	 */
	public SafeFileInputStream(String targetPath, String tempPath, int bufferSize) throws IOException {
		super(getInputStream(targetPath, tempPath, bufferSize));
	}

	private static InputStream getInputStream(String targetPath, String tempPath, int bufferSize) throws IOException {
		File target = new File(targetPath);
		if (!target.exists()) {
			if (tempPath == null)
				tempPath = target.getAbsolutePath() + EXTENSION;
			target = new File(tempPath);
		}
		return new BufferedInputStream(new FileInputStream(target), bufferSize);
	}
}