001/*
002 * Copyright 2002-2014 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.core.type.filter;
018
019import java.io.IOException;
020
021import org.aspectj.bridge.IMessageHandler;
022import org.aspectj.weaver.ResolvedType;
023import org.aspectj.weaver.World;
024import org.aspectj.weaver.bcel.BcelWorld;
025import org.aspectj.weaver.patterns.Bindings;
026import org.aspectj.weaver.patterns.FormalBinding;
027import org.aspectj.weaver.patterns.IScope;
028import org.aspectj.weaver.patterns.PatternParser;
029import org.aspectj.weaver.patterns.SimpleScope;
030import org.aspectj.weaver.patterns.TypePattern;
031
032import org.springframework.core.type.classreading.MetadataReader;
033import org.springframework.core.type.classreading.MetadataReaderFactory;
034
035/**
036 * Type filter that uses AspectJ type pattern for matching.
037 *
038 * <p>A critical implementation details of this type filter is that it does not
039 * load the class being examined to match with a type pattern.
040 *
041 * @author Ramnivas Laddad
042 * @author Juergen Hoeller
043 * @since 2.5
044 */
045public class AspectJTypeFilter implements TypeFilter {
046
047        private final World world;
048
049        private final TypePattern typePattern;
050
051
052        public AspectJTypeFilter(String typePatternExpression, ClassLoader classLoader) {
053                this.world = new BcelWorld(classLoader, IMessageHandler.THROW, null);
054                this.world.setBehaveInJava5Way(true);
055                PatternParser patternParser = new PatternParser(typePatternExpression);
056                TypePattern typePattern = patternParser.parseTypePattern();
057                typePattern.resolve(this.world);
058                IScope scope = new SimpleScope(this.world, new FormalBinding[0]);
059                this.typePattern = typePattern.resolveBindings(scope, Bindings.NONE, false, false);
060        }
061
062
063        @Override
064        public boolean match(MetadataReader metadataReader, MetadataReaderFactory metadataReaderFactory)
065                        throws IOException {
066
067                String className = metadataReader.getClassMetadata().getClassName();
068                ResolvedType resolvedType = this.world.resolve(className);
069                return this.typePattern.matchesStatically(resolvedType);
070        }
071
072}