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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) 2021 Gayan Perera 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:
 *     Gayan Perera - initial API and implementation
 *******************************************************************************/
package org.aspectj.org.eclipse.jdt.internal.core.search.indexing;

import java.util.stream.Stream;

import org.aspectj.org.eclipse.jdt.core.compiler.CharOperation;

/**
 * The index qualifier query which is used for searching MetaIndex qualifications in IndexManager.
 */
public final class QualifierQuery {
	public static final char[] NO_CHARS = new char[0];

	public enum QueryCategory {
		SUPER,
		REF;

		public static QueryCategory[] fromEncoded(char[][] encoded) {
			return Stream.of(encoded).map(c -> QueryCategory.valueOf(String.valueOf(c))).toArray(QueryCategory[]::new);
		}
	}


	private QueryCategory[] categories;

	private char[] simpleKey;

	private char[] qualifiedKey;

	private QualifierQuery(QueryCategory[] categories, char[] simpleKey, char[] qualifiedKey) {
		this.categories = categories;
		this.simpleKey = simpleKey;
		this.qualifiedKey = qualifiedKey;
	}

	public static QualifierQuery fromEncodedQuery(char[] query) {
		char[][] components = CharOperation.splitOn(':', query);
		return new QualifierQuery(QueryCategory.fromEncoded(CharOperation.splitOn(',', components[0])), components[1],
				components.length == 3 ? components[2] : NO_CHARS);
	}

	public static char[] encodeQuery(QueryCategory[] categories, char[] simpleKey, char[] qualifierKey) {
		char[] category = CharOperation.concatWith(Stream.of(categories).map(c -> c.name().toCharArray()).toArray(char[][]::new), ',');
		return CharOperation.concatWith(new char[][] {category, simpleKey, qualifierKey}, ':');
	}

	public QueryCategory[] getCategories() {
		return this.categories;
	}

	public char[] getQualifiedKey() {
		return this.qualifiedKey;
	}

	public char[] getSimpleKey() {
		return this.simpleKey;
	}
}