spring PackagesAnnotationFilter 源码
spring PackagesAnnotationFilter 代码
文件路径：/spring-core/src/main/java/org/springframework/core/annotation/PackagesAnnotationFilter.java
/*
* Copyright 2002-2019 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
*
* https://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.annotation;
import java.util.Arrays;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
/**
* {@link AnnotationFilter} implementation used for
* {@link AnnotationFilter#packages(String...)}.
*
* @author Phillip Webb
* @since 5.2
*/
final class PackagesAnnotationFilter implements AnnotationFilter {
private final String[] prefixes;
private final int hashCode;
PackagesAnnotationFilter(String... packages) {
Assert.notNull(packages, "Packages array must not be null");
this.prefixes = new String[packages.length];
for (int i = 0; i < packages.length; i++) {
String pkg = packages[i];
Assert.hasText(pkg, "Packages array must not have empty elements");
this.prefixes[i] = pkg + ".";
}
Arrays.sort(this.prefixes);
this.hashCode = Arrays.hashCode(this.prefixes);
}
@Override
public boolean matches(String annotationType) {
for (String prefix : this.prefixes) {
if (annotationType.startsWith(prefix)) {
return true;
}
}
return false;
}
@Override
public boolean equals(@Nullable Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
return Arrays.equals(this.prefixes, ((PackagesAnnotationFilter) other).prefixes);
}
@Override
public int hashCode() {
return this.hashCode;
}
@Override
public String toString() {
return "Packages annotation filter: " +
StringUtils.arrayToCommaDelimitedString(this.prefixes);
}
}
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