org.wildfly.security.auth.util.RegexNameRewriter Maven / Gradle / Ivy
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* Copyright 2013 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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.wildfly.security.auth.util;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.wildfly.security.auth.server.NameRewriter;
/**
* A simple regular expression-based name rewriter.
*/
public final class RegexNameRewriter implements NameRewriter {
private final Pattern pattern;
private final String replacement;
private final boolean replaceAll;
/**
* Construct a new instance.
*
* @param pattern the substitution pattern
* @param replacement the replacement string
* @param replaceAll {@code true} to replace all occurrences of the pattern; {@code false} to replace only the first occurrence
*/
public RegexNameRewriter(final Pattern pattern, final String replacement, final boolean replaceAll) {
this.pattern = pattern;
this.replacement = replacement;
this.replaceAll = replaceAll;
}
/**
* Rewrite a name. Must not return {@code null}.
*
* @param original the original name
*
* @return the rewritten name
*/
public String rewriteName(final String original) {
if (original == null) return null;
final Matcher matcher = pattern.matcher(original);
return replaceAll ? matcher.replaceAll(replacement) : matcher.replaceFirst(replacement);
}
/**
* Get the pattern.
*
* @return the pattern
*/
public Pattern getPattern() {
return pattern;
}
/**
* Get the replacement string.
*
* @return the replacement string
*/
public String getReplacement() {
return replacement;
}
}