Java tutorial
/* * Copyright 2015 TWO SIGMA OPEN SOURCE, LLC * * 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 com.twosigma.beaker.shared.module.util; import org.apache.commons.lang3.StringEscapeUtils; import org.apache.commons.lang3.StringUtils; public class ControlCharacterUtils { public static String escapeControlCharacters(final String value) { if (StringUtils.isNotEmpty(value)) { StringBuilder sb = new StringBuilder(); for (int i = 0; i < value.length(); i++) { if (Character.isISOControl(value.charAt(i))) { sb.append(StringEscapeUtils.escapeJson(value.substring(i, i + 1))); } else { sb.append(value.charAt(i)); } } return sb.toString(); } return StringUtils.EMPTY; } public static boolean containsControlCharacters(final String value) { if (StringUtils.isNotEmpty(value)) { for (int i = 0; i < value.length(); i++) { char c = value.charAt(i); if (!Character.isWhitespace(c) && Character.isISOControl(c)) { return true; } } } return false; } }