001/*-
002 * #%L
003 * HAPI FHIR - Server Framework
004 * %%
005 * Copyright (C) 2014 - 2024 Smile CDR, Inc.
006 * %%
007 * Licensed under the Apache License, Version 2.0 (the "License");
008 * you may not use this file except in compliance with the License.
009 * You may obtain a copy of the License at
010 *
011 *      http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 * #L%
019 */
020package ca.uhn.fhir.rest.server.interceptor.s13n.standardizers;
021
022/**
023 * Standardizes email addresses by removing whitespace, ISO control characters and applying lower-case to the values.
024 */
025public class EmailStandardizer implements IStandardizer {
026
027        @Override
028        public String standardize(String theString) {
029                StringBuilder buf = new StringBuilder();
030                for (int offset = 0; offset < theString.length(); ) {
031                        int codePoint = theString.codePointAt(offset);
032                        offset += Character.charCount(codePoint);
033
034                        if (Character.isISOControl(codePoint)) {
035                                continue;
036                        }
037
038                        if (!Character.isWhitespace(codePoint)) {
039                                buf.append(new String(Character.toChars(codePoint)).toLowerCase());
040                        }
041                }
042                return buf.toString();
043        }
044}