org.springframework.aop.support.ClassFilters Maven / Gradle / Ivy
/*
* Copyright 2002-2006 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.aop.support;
import java.io.Serializable;
import java.util.Arrays;
import org.springframework.aop.ClassFilter;
import org.springframework.util.Assert;
import org.springframework.util.ObjectUtils;
/**
* Static methods useful for composing ClassFilters.
*
* @author Rod Johnson
* @author Rob Harrop
* @since 11.11.2003
*/
public abstract class ClassFilters {
public static ClassFilter union(ClassFilter a, ClassFilter b) {
return new UnionClassFilter(new ClassFilter[] { a, b } );
}
public static ClassFilter intersection(ClassFilter a, ClassFilter b) {
return new IntersectionClassFilter(new ClassFilter[] { a, b } );
}
private static class UnionClassFilter implements ClassFilter, Serializable {
private ClassFilter[] filters;
public UnionClassFilter(ClassFilter[] filters) {
Assert.notNull(filters, "'filters' cannot be null.");
this.filters = filters;
}
public boolean matches(Class clazz) {
for (int i = 0; i < filters.length; i++) {
if (filters[i].matches(clazz)) {
return true;
}
}
return false;
}
public boolean equals(Object other) {
if (this == other) {
return true;
}
return (other instanceof UnionClassFilter &&
ObjectUtils.nullSafeEquals(this.filters, ((UnionClassFilter) other).filters));
}
public int hashCode() {
return Arrays.hashCode(this.filters);
}
}
private static class IntersectionClassFilter implements ClassFilter, Serializable {
private ClassFilter[] filters;
public IntersectionClassFilter(ClassFilter[] filters) {
Assert.notNull(filters, "'filters' cannot be null.");
this.filters = filters;
}
public boolean matches(Class clazz) {
for (int i = 0; i < filters.length; i++) {
if (!filters[i].matches(clazz)) {
return false;
}
}
return true;
}
public boolean equals(Object other) {
if (this == other) {
return true;
}
return (other instanceof IntersectionClassFilter &&
ObjectUtils.nullSafeEquals(this.filters, ((IntersectionClassFilter) other).filters));
}
public int hashCode() {
return Arrays.hashCode(this.filters);
}
}
}