kafka ResourcePattern 源码
kafka ResourcePattern 代码
文件路径:/clients/src/main/java/org/apache/kafka/common/resource/ResourcePattern.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.kafka.common.resource;
import org.apache.kafka.common.annotation.InterfaceStability;
import java.util.Objects;
/**
* Represents a pattern that is used by ACLs to match zero or more
* {@link org.apache.kafka.common.resource.Resource Resources}.
*
* The API for this class is still evolving and we may break compatibility in minor releases, if necessary.
*/
@InterfaceStability.Evolving
public class ResourcePattern {
/**
* A special literal resource name that corresponds to 'all resources of a certain type'.
*/
public static final String WILDCARD_RESOURCE = "*";
private final ResourceType resourceType;
private final String name;
private final PatternType patternType;
/**
* Create a pattern using the supplied parameters.
*
* @param resourceType non-null, specific, resource type
* @param name non-null resource name, which can be the {@link #WILDCARD_RESOURCE}.
* @param patternType non-null, specific, resource pattern type, which controls how the pattern will match resource names.
*/
public ResourcePattern(ResourceType resourceType, String name, PatternType patternType) {
this.resourceType = Objects.requireNonNull(resourceType, "resourceType");
this.name = Objects.requireNonNull(name, "name");
this.patternType = Objects.requireNonNull(patternType, "patternType");
if (resourceType == ResourceType.ANY) {
throw new IllegalArgumentException("resourceType must not be ANY");
}
if (patternType == PatternType.MATCH || patternType == PatternType.ANY) {
throw new IllegalArgumentException("patternType must not be " + patternType);
}
}
/**
* @return the specific resource type this pattern matches
*/
public ResourceType resourceType() {
return resourceType;
}
/**
* @return the resource name.
*/
public String name() {
return name;
}
/**
* @return the resource pattern type.
*/
public PatternType patternType() {
return patternType;
}
/**
* @return a filter which matches only this pattern.
*/
public ResourcePatternFilter toFilter() {
return new ResourcePatternFilter(resourceType, name, patternType);
}
@Override
public String toString() {
return "ResourcePattern(resourceType=" + resourceType + ", name=" + name + ", patternType=" + patternType + ")";
}
/**
* @return {@code true} if this Resource has any UNKNOWN components.
*/
public boolean isUnknown() {
return resourceType.isUnknown() || patternType.isUnknown();
}
@Override
public boolean equals(Object o) {
if (this == o)
return true;
if (o == null || getClass() != o.getClass())
return false;
final ResourcePattern resource = (ResourcePattern) o;
return resourceType == resource.resourceType &&
Objects.equals(name, resource.name) &&
patternType == resource.patternType;
}
@Override
public int hashCode() {
return Objects.hash(resourceType, name, patternType);
}
}
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