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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) 2000, 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
 *     James Blackburn (Broadcom Corp.) - ongoing development
 *     Lars Vogel  - Bug 473427
 *******************************************************************************/
package org.eclipse.core.internal.resources;

import java.io.DataInputStream;
import java.io.EOFException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.internal.utils.Messages;
import org.eclipse.core.internal.utils.ObjectMap;
import org.eclipse.core.resources.IResourceStatus;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.QualifiedName;
import org.eclipse.osgi.util.NLS;

/**
 * This class is used to read sync info from disk. This is the implementation
 * for reading files with version number 2.
 */
public class SyncInfoReader_2 extends SyncInfoReader {

	// for sync info
	public static final int INDEX = 1;
	public static final int QNAME = 2;

	public SyncInfoReader_2(Workspace workspace, Synchronizer synchronizer) {
		super(workspace, synchronizer);
	}

	/**
	 *  {@code
	 * SAVE_FILE -> VERSION_ID RESOURCE*
	 * VERSION_ID -> int
	 * RESOURCE -> RESOURCE_PATH SIZE SYNCINFO*
	 * RESOURCE_PATH -> String
	 * SIZE -> int
	 * SYNCINFO -> TYPE BYTES
	 * TYPE -> INDEX | QNAME
	 * INDEX -> int int
	 * QNAME -> int String
	 * BYTES -> byte[]
	 * }
	 */
	@Override
	public void readSyncInfo(DataInputStream input) throws IOException, CoreException {
		try {
			List readPartners = new ArrayList<>(5);
			while (true) {
				IPath path = IPath.fromOSString(input.readUTF());
				readSyncInfo(path, input, readPartners);
			}
		} catch (EOFException e) {
			// ignore end of file
		}
	}

	private void readSyncInfo(IPath path, DataInputStream input, List readPartners) throws IOException, CoreException {
		int size = input.readInt();
		ObjectMap table = new ObjectMap<>(size);
		for (int i = 0; i < size; i++) {
			QualifiedName name = null;
			int type = input.readInt();
			switch (type) {
				case QNAME :
					String qualifier = input.readUTF();
					String local = input.readUTF();
					name = new QualifiedName(qualifier, local);
					readPartners.add(name);
					break;
				case INDEX :
					name = readPartners.get(input.readInt());
					break;
				default :
					//if we get here then the sync info file is corrupt
					String msg = NLS.bind(Messages.resources_readSync, path == null ? "" : path.toString()); //$NON-NLS-1$
					throw new ResourceException(IResourceStatus.FAILED_READ_METADATA, path, msg, null);
			}
			// read the bytes
			int length = input.readInt();
			byte[] bytes = new byte[length];
			input.readFully(bytes);
			// put them in the table
			table.put(name, bytes);
		}
		// set the table on the resource info
		ResourceInfo info = workspace.getResourceInfo(path, true, false);
		if (info == null)
			return;
		info.setSyncInfo(table);
		info.clear(ICoreConstants.M_SYNCINFO_SNAP_DIRTY);
	}
}