org.springframework.core.type.filter.AspectJTypeFilter Maven / Gradle / Ivy
/*
* Copyright 2002-2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.core.type.filter;
import java.io.IOException;
import org.aspectj.bridge.IMessageHandler;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.World;
import org.aspectj.weaver.bcel.BcelWorld;
import org.aspectj.weaver.patterns.Bindings;
import org.aspectj.weaver.patterns.FormalBinding;
import org.aspectj.weaver.patterns.IScope;
import org.aspectj.weaver.patterns.PatternParser;
import org.aspectj.weaver.patterns.SimpleScope;
import org.aspectj.weaver.patterns.TypePattern;
import org.springframework.core.type.classreading.MetadataReader;
import org.springframework.core.type.classreading.MetadataReaderFactory;
import org.springframework.lang.Nullable;
/**
* Type filter that uses AspectJ type pattern for matching.
*
* A critical implementation details of this type filter is that it does not
* load the class being examined to match with a type pattern.
*
* @author Ramnivas Laddad
* @author Juergen Hoeller
* @since 2.5
*/
public class AspectJTypeFilter implements TypeFilter {
private final World world;
private final TypePattern typePattern;
public AspectJTypeFilter(String typePatternExpression, @Nullable ClassLoader classLoader) {
this.world = new BcelWorld(classLoader, IMessageHandler.THROW, null);
this.world.setBehaveInJava5Way(true);
PatternParser patternParser = new PatternParser(typePatternExpression);
TypePattern typePattern = patternParser.parseTypePattern();
typePattern.resolve(this.world);
IScope scope = new SimpleScope(this.world, new FormalBinding[0]);
this.typePattern = typePattern.resolveBindings(scope, Bindings.NONE, false, false);
}
@Override
public boolean match(MetadataReader metadataReader, MetadataReaderFactory metadataReaderFactory)
throws IOException {
String className = metadataReader.getClassMetadata().getClassName();
ResolvedType resolvedType = this.world.resolve(className);
return this.typePattern.matchesStatically(resolvedType);
}
}