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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, 2005 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.watson;

import java.io.*;
import org.eclipse.core.runtime.IPath;

/**
 * The IElementInfoFlattener interface supports
 * reading and writing element info objects.
 */
public interface IElementInfoFlattener {
	/**
	 * Reads an element info from the given input stream.
	 * @param elementPath the path of the element to be read
	 * @param input the stream from which the element info should be read.
	 * @return the object associated with the given elementPath,
	 *   which may be null.
	 */
	Object readElement(IPath elementPath, DataInput input) throws IOException;

	/**
	 * Writes the given element to the output stream.
	 *  N.B. The bytes written must be sufficient for the
	 * purposes of reading the object back in.
	 * @param elementPath the element's path in the tree
	 * @param element the object associated with the given path,
	 *   which may be null.
	 */
	void writeElement(IPath elementPath, Object element, DataOutput output) throws IOException;
}