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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) 2008 Contributors
 *
 * 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:
 *   Andy Clement - refactored out of MemberImpl
 * ******************************************************************/
package org.aspectj.weaver;

import java.lang.reflect.Modifier;

public class SignatureUtils {

	public static String getSignatureString(Member m, World world) {
		MemberKind kind = m.getKind();
		if (kind == Member.METHOD) {
			return getMethodSignatureString(m, world);
		} else if (kind == Member.CONSTRUCTOR) {
			return getConstructorSignatureString(m, world);
		} else if (kind == Member.FIELD) {
			return getFieldSignatureString(m, world);
		} else if (kind == Member.HANDLER) {
			return getHandlerSignatureString(m, world);
		} else if (kind == Member.STATIC_INITIALIZATION) {
			return getStaticInitializationSignatureString(m, world);
		} else if (kind == Member.ADVICE) {
			return getAdviceSignatureString(m, world);
		} else if (kind == Member.MONITORENTER || kind == Member.MONITOREXIT) {
			return getMonitorSignatureString(m, world);
		} else {
			throw new BCException("Do not know the signature string for MemberKind " + kind);
		}
	}

	public static String getSignatureMakerName(Member m) {
		MemberKind kind = m.getKind();
		if (kind == Member.METHOD) {
			return "makeMethodSig";
		} else if (kind == Member.CONSTRUCTOR) {
			return "makeConstructorSig";
		} else if (kind == Member.FIELD) {
			return "makeFieldSig";
		} else if (kind == Member.HANDLER) {
			return "makeCatchClauseSig";
		} else if (kind == Member.STATIC_INITIALIZATION) {
			return "makeInitializerSig";
		} else if (kind == Member.ADVICE) {
			return "makeAdviceSig";
		} else if (kind == Member.MONITORENTER) {
			return "makeLockSig";
		} else if (kind == Member.MONITOREXIT) {
			return "makeUnlockSig";
		} else {
			throw new BCException("Do not know the signature maker name for MemberKind " + kind);
		}
	}

	public static String getSignatureType(Member m) {
		MemberKind kind = m.getKind();
		if (m.getName().equals("") && kind != Member.STATIC_INITIALIZATION)
			throw new BCException();
		// if (m.getName().equals("")) return "org.aspectj.lang.reflect.InitializerSignature";

		if (kind == Member.METHOD) {
			return "org.aspectj.lang.reflect.MethodSignature";
		} else if (kind == Member.CONSTRUCTOR) {
			return "org.aspectj.lang.reflect.ConstructorSignature";
		} else if (kind == Member.FIELD) {
			return "org.aspectj.lang.reflect.FieldSignature";
		} else if (kind == Member.HANDLER) {
			return "org.aspectj.lang.reflect.CatchClauseSignature";
		} else if (kind == Member.STATIC_INITIALIZATION) {
			return "org.aspectj.lang.reflect.InitializerSignature";
		} else if (kind == Member.ADVICE) {
			return "org.aspectj.lang.reflect.AdviceSignature";
		} else if (kind == Member.MONITORENTER) {
			return "org.aspectj.lang.reflect.LockSignature";
		} else if (kind == Member.MONITOREXIT) {
			return "org.aspectj.lang.reflect.UnlockSignature";
		} else {
			throw new BCException("Do not know the signature type for MemberKind " + kind);
		}
	}

	// ---

	private static String getHandlerSignatureString(Member m, World world) {
		StringBuilder buf = new StringBuilder();
		buf.append(makeString(0));
		buf.append('-');
		// buf.append(getName());
		buf.append('-');
		buf.append(makeString(m.getDeclaringType()));
		buf.append('-');
		buf.append(makeString(m.getParameterTypes()[0]));
		buf.append('-');
		String pName = "";
		String[] names = m.getParameterNames(world);
		if (names != null)
			pName = names[0];
		buf.append(pName);
		buf.append('-');
		return buf.toString();
	}

	private static String getStaticInitializationSignatureString(Member m, World world) {
		StringBuilder buf = new StringBuilder();
		buf.append(makeString(m.getModifiers(world)));
		buf.append('-');
		// buf.append(getName());
		buf.append('-');
		buf.append(makeString(m.getDeclaringType()));
		buf.append('-');
		return buf.toString();
	}

	protected static String getAdviceSignatureString(Member m, World world) {
		StringBuilder buf = new StringBuilder();
		buf.append(makeString(m.getModifiers(world)));
		buf.append('-');
		buf.append(m.getName());
		buf.append('-');
		buf.append(makeString(m.getDeclaringType()));
		buf.append('-');
		buf.append(makeString(m.getParameterTypes()));
		buf.append('-');
		buf.append(makeString(m.getParameterNames(world)));
		buf.append('-');
		buf.append(makeString(m.getExceptions(world)));
		buf.append('-');
		buf.append(makeString(m.getReturnType()));
		buf.append('-');
		return buf.toString();
	}

	protected static String getMethodSignatureString(Member m, World world) {
		StringBuilder buf = new StringBuilder();
		buf.append(makeString(m.getModifiers(world)));
		buf.append('-');
		buf.append(m.getName());
		buf.append('-');
		buf.append(makeString(m.getDeclaringType()));
		buf.append('-');
		buf.append(makeString(m.getParameterTypes()));
		buf.append('-');
		buf.append(makeString(m.getParameterNames(world)));
		buf.append('-');
		buf.append(makeString(m.getExceptions(world)));
		buf.append('-');
		buf.append(makeString(m.getReturnType()));
		buf.append('-');
		return buf.toString();
	}

	protected static String getMonitorSignatureString(Member m, World world) {
		StringBuilder buf = new StringBuilder();
		buf.append(makeString(Modifier.STATIC)); // modifiers
		buf.append('-');
		buf.append(m.getName()); // name
		buf.append('-');
		buf.append(makeString(m.getDeclaringType())); // Declaring Type
		buf.append('-');
		buf.append(makeString(m.getParameterTypes()[0])); // Parameter Types
		buf.append('-');
		buf.append(""); // Parameter names
		buf.append('-');
		return buf.toString();
	}

	protected static String getConstructorSignatureString(Member m, World world) {
		StringBuilder buf = new StringBuilder();
		buf.append(makeString(m.getModifiers(world)));
		buf.append('-');
		buf.append('-');
		buf.append(makeString(m.getDeclaringType()));
		buf.append('-');
		buf.append(makeString(m.getParameterTypes()));
		buf.append('-');
		buf.append(makeString(m.getParameterNames(world)));
		buf.append('-');
		buf.append(makeString(m.getExceptions(world)));
		buf.append('-');
		return buf.toString();
	}

	protected static String getFieldSignatureString(Member m, World world) {
		StringBuilder buf = new StringBuilder();
		buf.append(makeString(m.getModifiers(world)));
		buf.append('-');
		buf.append(m.getName());
		buf.append('-');
		buf.append(makeString(m.getDeclaringType()));
		buf.append('-');
		buf.append(makeString(m.getReturnType()));
		buf.append('-');
		return buf.toString();
	}

	protected static String makeString(int i) {
		return Integer.toString(i, 16);
	}

	protected static String makeString(UnresolvedType t) {
		// this is the inverse of the odd behavior for Class.forName w/ arrays
		if (t.isArray()) {
			// this behavior matches the string used by the eclipse compiler for Foo.class literals
			return t.getSignature().replace('/', '.');
		} else {
			return t.getName();
		}
	}

	protected static String makeString(UnresolvedType[] types) {
		if (types == null)
			return "";
		StringBuilder buf = new StringBuilder();
		for (UnresolvedType type : types) {
			buf.append(makeString(type));
			buf.append(':');
		}
		return buf.toString();
	}

	protected static String makeString(String[] names) {
		if (names == null)
			return "";
		StringBuilder buf = new StringBuilder();
		for (String name : names) {
			buf.append(name);
			buf.append(':');
		}
		return buf.toString();
	}

}