org.apache.hadoop.hdfs.web.resources.StringParam Maven / Gradle / Ivy
/**
* 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.hdfs.web.resources;
import java.util.regex.Pattern;
/** String parameter. */
abstract class StringParam extends Param {
StringParam(final Domain domain, String str) {
super(domain, domain.parse(str));
}
/** @return the parameter value as a string */
@Override
public String getValueString() {
return value;
}
/** The domain of the parameter. */
static final class Domain extends Param.Domain {
/** The pattern defining the domain; null . */
private final Pattern pattern;
Domain(final String paramName, final Pattern pattern) {
super(paramName);
this.pattern = pattern;
}
@Override
public final String getDomain() {
return pattern == null ? "" : pattern.pattern();
}
@Override
final String parse(final String str) {
if (str != null && pattern != null) {
if (!pattern.matcher(str).matches()) {
throw new IllegalArgumentException("Invalid value: \"" + str
+ "\" does not belong to the domain " + getDomain());
}
}
return str;
}
}
}