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The AspectJ matcher can be used for matching pointcuts independently of any AspectJ compilation or weaving steps. Most notably, this can be used by frameworks such as Spring AOP which utilise the @AspectJ pointcut syntax but implement aspect weaving in a way independent of AspectJ, e.g. using dynamic proxies.

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/* *******************************************************************
 * Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC).
 * All rights reserved.
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Public License v 2.0
 * which accompanies this distribution and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
 *
 * Contributors:
 *     PARC     initial implementation
 * ******************************************************************/

package org.aspectj.weaver.patterns;

import java.io.IOException;
import java.util.Map;

import org.aspectj.weaver.CompressingDataOutputStream;
import org.aspectj.weaver.ISourceContext;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.UnresolvedType;
import org.aspectj.weaver.VersionedDataInputStream;
import org.aspectj.weaver.World;

public class ThrowsPattern extends PatternNode {
	private TypePatternList required;
	private TypePatternList forbidden;

	public static final ThrowsPattern ANY = new ThrowsPattern(TypePatternList.EMPTY, TypePatternList.EMPTY);

	public ThrowsPattern(TypePatternList required, TypePatternList forbidden) {
		this.required = required;
		this.forbidden = forbidden;
	}

	public TypePatternList getRequired() {
		return required;
	}

	public TypePatternList getForbidden() {
		return forbidden;
	}

	public String toString() {
		if (this == ANY) {
			return "";
		}

		String ret = "throws " + required.toString();
		if (forbidden.size() > 0) {
			ret = ret + " !(" + forbidden.toString() + ")";
		}
		return ret;
	}

	public boolean equals(Object other) {
		if (!(other instanceof ThrowsPattern)) {
			return false;
		}
		ThrowsPattern o = (ThrowsPattern) other;
		boolean ret = o.required.equals(this.required) && o.forbidden.equals(this.forbidden);
		return ret;
	}

	public int hashCode() {
		int result = 17;
		result = 37 * result + required.hashCode();
		result = 37 * result + forbidden.hashCode();
		return result;
	}

	public ThrowsPattern resolveBindings(IScope scope, Bindings bindings) {
		if (this == ANY) {
			return this;
		}
		required = required.resolveBindings(scope, bindings, false, false);
		forbidden = forbidden.resolveBindings(scope, bindings, false, false);
		return this;
	}

	public ThrowsPattern parameterizeWith(Map typeVariableMap, World w) {
		ThrowsPattern ret = new ThrowsPattern(required.parameterizeWith(typeVariableMap, w), forbidden.parameterizeWith(
				typeVariableMap, w));
		ret.copyLocationFrom(this);
		return ret;
	}

	public boolean matches(UnresolvedType[] tys, World world) {
		if (this == ANY) {
			return true;
		}

		// System.out.println("matching: " + this + " with " + Arrays.asList(tys));

		ResolvedType[] types = world.resolve(tys);
		// int len = types.length;
		for (int j = 0, lenj = required.size(); j < lenj; j++) {
			if (!matchesAny(required.get(j), types)) {
				return false;
			}
		}
		for (int j = 0, lenj = forbidden.size(); j < lenj; j++) {
			if (matchesAny(forbidden.get(j), types)) {
				return false;
			}
		}
		return true;
	}

	private boolean matchesAny(TypePattern typePattern, ResolvedType[] types) {
		for (int i = types.length - 1; i >= 0; i--) {
			if (typePattern.matchesStatically(types[i])) {
				return true;
			}
		}
		return false;
	}

	public static ThrowsPattern read(VersionedDataInputStream s, ISourceContext context) throws IOException {
		TypePatternList required = TypePatternList.read(s, context);
		TypePatternList forbidden = TypePatternList.read(s, context);
		if (required.size() == 0 && forbidden.size() == 0) {
			return ANY;
		}
		ThrowsPattern ret = new ThrowsPattern(required, forbidden);
		// XXXret.readLocation(context, s);
		return ret;
	}

	public void write(CompressingDataOutputStream s) throws IOException {
		required.write(s);
		forbidden.write(s);
		// XXXwriteLocation(s);
	}

	public Object accept(PatternNodeVisitor visitor, Object data) {
		return visitor.visit(this, data);
	}

	public Object traverse(PatternNodeVisitor visitor, Object data) {
		Object ret = accept(visitor, data);
		forbidden.traverse(visitor, data);
		required.traverse(visitor, data);
		return ret;
	}
}