org.aspectj.weaver.patterns.NotTypePattern Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of aspectjtools Show documentation

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.

There is a newer version: 1.9.22.1

Show newest version

/* *******************************************************************
 * 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.util.FuzzyBoolean;
import org.aspectj.weaver.AjAttribute;
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;

/**
 * !TypePattern
 *
 * 
 * any binding to formals is explicitly forbidden for any composite, ! is just the most obviously wrong case.
 *
 * @author Erik Hilsdale
 * @author Jim Hugunin
 */
public class NotTypePattern extends TypePattern {
	private TypePattern negatedPattern;
	private boolean isBangVoid = false; // is this '!void'
	private boolean checked = false;

	public NotTypePattern(TypePattern pattern) {
		super(false, false); // ??? we override all methods that care about includeSubtypes
		this.negatedPattern = pattern;
		setLocation(pattern.getSourceContext(), pattern.getStart(), pattern.getEnd());
	}

	public TypePattern getNegatedPattern() {
		return negatedPattern;
	}

	@Override
	protected boolean couldEverMatchSameTypesAs(TypePattern other) {
		return true;
	}

	@Override
	public FuzzyBoolean matchesInstanceof(ResolvedType type) {
		return negatedPattern.matchesInstanceof(type).not();
	}

	@Override
	protected boolean matchesExactly(ResolvedType type) {
		return (!negatedPattern.matchesExactly(type) && annotationPattern.matches(type).alwaysTrue());
	}

	@Override
	protected boolean matchesExactly(ResolvedType type, ResolvedType annotatedType) {
		return (!negatedPattern.matchesExactly(type, annotatedType) && annotationPattern.matches(annotatedType).alwaysTrue());
	}

	@Override
	protected boolean matchesArray(UnresolvedType type) {
		// '!String' should match anything but String, no matter if it is an array or not,
		// e.g. int, void, int[], String[], String[][].
		//
		// '!String[]' should match anything but String[], no matter if it is an array or not,
		// e.g. int, void, int[], String, String[][].
		return true;
	}

	@Override
	public boolean matchesStatically(ResolvedType type) {
		return !negatedPattern.matchesStatically(type);
	}

	@Override
	public void setAnnotationTypePattern(AnnotationTypePattern annPatt) {
		super.setAnnotationTypePattern(annPatt);
	}

	@Override
	public void setIsVarArgs(boolean isVarArgs) {
		negatedPattern.setIsVarArgs(isVarArgs);
	}

	@Override
	public void write(CompressingDataOutputStream s) throws IOException {
		s.writeByte(TypePattern.NOT);
		negatedPattern.write(s);
		annotationPattern.write(s);
		writeLocation(s);
	}

	public static TypePattern read(VersionedDataInputStream s, ISourceContext context) throws IOException {
		TypePattern ret = new NotTypePattern(TypePattern.read(s, context));
		if (s.getMajorVersion() >= AjAttribute.WeaverVersionInfo.WEAVER_VERSION_MAJOR_AJ150) {
			ret.annotationPattern = AnnotationTypePattern.read(s, context);
		}
		ret.readLocation(context, s);
		return ret;
	}

	@Override
	public TypePattern resolveBindings(IScope scope, Bindings bindings, boolean allowBinding, boolean requireExactType) {
		if (requireExactType) {
			return notExactType(scope);
		}
		negatedPattern = negatedPattern.resolveBindings(scope, bindings, false, false);
		return this;
	}

	@Override
	public boolean isBangVoid() {
		if (!checked) {
			isBangVoid = negatedPattern.getExactType().isVoid();
			checked = true;
		}
		return isBangVoid;
	}

	@Override
	public TypePattern parameterizeWith(Map typeVariableMap, World w) {
		TypePattern newNegatedPattern = negatedPattern.parameterizeWith(typeVariableMap, w);
		NotTypePattern ret = new NotTypePattern(newNegatedPattern);
		ret.copyLocationFrom(this);
		return ret;
	}

	@Override
	public String toString() {
		StringBuilder buff = new StringBuilder();
		if (annotationPattern != AnnotationTypePattern.ANY) {
			buff.append('(');
			buff.append(annotationPattern.toString());
			buff.append(' ');
		}
		buff.append('!');
		buff.append(negatedPattern);
		if (annotationPattern != AnnotationTypePattern.ANY) {
			buff.append(')');
		}
		return buff.toString();
	}

	/*
	 * (non-Javadoc)
	 *
	 * @see java.lang.Object#equals(java.lang.Object)
	 */
	@Override
	public boolean equals(Object obj) {
		if (!(obj instanceof NotTypePattern)) {
			return false;
		}
		return (negatedPattern.equals(((NotTypePattern) obj).negatedPattern));
	}

	/*
	 * (non-Javadoc)
	 *
	 * @see java.lang.Object#hashCode()
	 */
	@Override
	public int hashCode() {
		return 17 + 37 * negatedPattern.hashCode();
	}

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

	@Override
	public Object traverse(PatternNodeVisitor visitor, Object data) {
		Object ret = accept(visitor, data);
		if (this.negatedPattern != null)
			this.negatedPattern.traverse(visitor, ret);
		return ret;
	}

}