001/*
002 * Copyright 2002-2017 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;
034import org.springframework.lang.Nullable;
035
036/**
037 * Type filter that uses AspectJ type pattern for matching.
038 *
039 * <p>A critical implementation details of this type filter is that it does not
040 * load the class being examined to match with a type pattern.
041 *
042 * @author Ramnivas Laddad
043 * @author Juergen Hoeller
044 * @since 2.5
045 */
046public class AspectJTypeFilter implements TypeFilter {
047
048        private final World world;
049
050        private final TypePattern typePattern;
051
052
053        public AspectJTypeFilter(String typePatternExpression, @Nullable ClassLoader classLoader) {
054                this.world = new BcelWorld(classLoader, IMessageHandler.THROW, null);
055                this.world.setBehaveInJava5Way(true);
056                PatternParser patternParser = new PatternParser(typePatternExpression);
057                TypePattern typePattern = patternParser.parseTypePattern();
058                typePattern.resolve(this.world);
059                IScope scope = new SimpleScope(this.world, new FormalBinding[0]);
060                this.typePattern = typePattern.resolveBindings(scope, Bindings.NONE, false, false);
061        }
062
063
064        @Override
065        public boolean match(MetadataReader metadataReader, MetadataReaderFactory metadataReaderFactory)
066                        throws IOException {
067
068                String className = metadataReader.getClassMetadata().getClassName();
069                ResolvedType resolvedType = this.world.resolve(className);
070                return this.typePattern.matchesStatically(resolvedType);
071        }
072
073}