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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

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/*******************************************************************************
 * Copyright (c) 2010 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.filesystem.local.unix;

import org.eclipse.core.filesystem.EFS;
import org.eclipse.core.filesystem.provider.FileInfo;

/**
 * This class mirrors relevant fields of native struct stat
 * and is used by JNI calls wrapping OS file related functions.
 */
public class StructStat {

	private static final boolean USE_MILLISECOND_RESOLUTION = Boolean.parseBoolean(System.getProperty("eclipse.filesystem.useNatives.modificationTimestampMillisecondsResolution", "true")); //$NON-NLS-1$ //$NON-NLS-2$

	public int st_mode;
	public long st_size;
	public long st_mtime;
	public long st_mtime_msec; // millisecond component of the file timestamp, filled on Linux systems
	public long st_flags; // Filled only on Mac OS X

	public FileInfo toFileInfo() {
		FileInfo info = new FileInfo();
		info.setExists(true);
		info.setLength(st_size);
		long lastModified = (st_mtime * 1_000);
		if (USE_MILLISECOND_RESOLUTION) {
			lastModified += st_mtime_msec;
		}
		info.setLastModified(lastModified);
		if ((st_mode & UnixFileFlags.S_IFMT) == UnixFileFlags.S_IFDIR)
			info.setDirectory(true);
		if ((st_flags & (UnixFileFlags.UF_IMMUTABLE | UnixFileFlags.SF_IMMUTABLE)) != 0)
			info.setAttribute(EFS.ATTRIBUTE_IMMUTABLE, true);
		if ((st_mode & UnixFileFlags.S_IRUSR) == 0) // Set to true in FileInfo constructor
			info.setAttribute(EFS.ATTRIBUTE_OWNER_READ, false);
		if ((st_mode & UnixFileFlags.S_IWUSR) == 0) // Set to true in FileInfo constructor
			info.setAttribute(EFS.ATTRIBUTE_OWNER_WRITE, false);
		if ((st_mode & UnixFileFlags.S_IXUSR) != 0)
			info.setAttribute(EFS.ATTRIBUTE_OWNER_EXECUTE, true);
		if ((st_mode & UnixFileFlags.S_IRGRP) != 0)
			info.setAttribute(EFS.ATTRIBUTE_GROUP_READ, true);
		if ((st_mode & UnixFileFlags.S_IWGRP) != 0)
			info.setAttribute(EFS.ATTRIBUTE_GROUP_WRITE, true);
		if ((st_mode & UnixFileFlags.S_IXGRP) != 0)
			info.setAttribute(EFS.ATTRIBUTE_GROUP_EXECUTE, true);
		if ((st_mode & UnixFileFlags.S_IROTH) != 0)
			info.setAttribute(EFS.ATTRIBUTE_OTHER_READ, true);
		if ((st_mode & UnixFileFlags.S_IWOTH) != 0)
			info.setAttribute(EFS.ATTRIBUTE_OTHER_WRITE, true);
		if ((st_mode & UnixFileFlags.S_IXOTH) != 0)
			info.setAttribute(EFS.ATTRIBUTE_OTHER_EXECUTE, true);
		return info;
	}

}