hadoop PatternValidator 源码
haddop PatternValidator 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-core/src/main/java/org/apache/hadoop/yarn/service/utils/PatternValidator.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.hadoop.yarn.service.utils;
import java.util.regex.Pattern;
/**
* Utility class to validate strings against a predefined pattern.
*/
public class PatternValidator {
public static final String E_INVALID_NAME =
"Invalid name %s does not match the pattern %s ";
private final Pattern valid;
private final String pattern;
public PatternValidator(String pattern) {
this.pattern = pattern;
valid = Pattern.compile(pattern);
}
/**
* Validate the name -restricting it to the set defined in
* @param name name to validate
* @throws IllegalArgumentException if not a valid name
*/
public void validate(String name) {
if (!matches(name)) {
throw new IllegalArgumentException(
String.format(E_INVALID_NAME, name, pattern));
}
}
/**
* Query to see if the pattern matches
* @param name name to validate
* @return true if the string matches the pattern
*/
public boolean matches(String name) {
return valid.matcher(name).matches();
}
}
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