1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.databinding.tool.util; 18 19 import com.google.common.base.StandardSystemProperty; 20 import com.google.common.base.Strings; 21 22 import org.antlr.v4.runtime.misc.Nullable; 23 24 public class StringUtils { 25 26 public static final String LINE_SEPARATOR = StandardSystemProperty.LINE_SEPARATOR.value(); 27 /** The entity for the ampersand character */ 28 private static final String AMP_ENTITY = "&"; 29 /** The entity for the quote character */ 30 private static final String QUOT_ENTITY = """; 31 /** The entity for the apostrophe character */ 32 private static final String APOS_ENTITY = "'"; 33 /** The entity for the less than character */ 34 private static final String LT_ENTITY = "<"; 35 /** The entity for the greater than character */ 36 private static final String GT_ENTITY = ">"; 37 /** The entity for the tab character */ 38 private static final String TAB_ENTITY = "	"; 39 /** The entity for the carriage return character */ 40 private static final String CR_ENTITY = "
"; 41 /** The entity for the line feed character */ 42 private static final String LFEED_ENTITY = "
"; 43 isNotBlank(@ullable CharSequence string)44 public static boolean isNotBlank(@Nullable CharSequence string) { 45 if (string == null) { 46 return false; 47 } 48 for (int i = 0, n = string.length(); i < n; i++) { 49 if (!Character.isWhitespace(string.charAt(i))) { 50 return true; 51 } 52 } 53 return false; 54 } 55 capitalize(@ullable String string)56 public static String capitalize(@Nullable String string) { 57 if (Strings.isNullOrEmpty(string)) { 58 return string; 59 } 60 char ch = string.charAt(0); 61 if (Character.isTitleCase(ch)) { 62 return string; 63 } 64 return Character.toTitleCase(ch) + string.substring(1); 65 } 66 unescapeXml(String escaped)67 public static String unescapeXml(String escaped) { 68 // TODO: unescape unicode codepoints 69 return escaped.replace(QUOT_ENTITY, "\"") 70 .replace(LT_ENTITY, "<") 71 .replace(GT_ENTITY, ">") 72 .replace(APOS_ENTITY, "'") 73 .replace(AMP_ENTITY, "&") 74 .replace(TAB_ENTITY, "\t") 75 .replace(CR_ENTITY, "\r") 76 .replace(LFEED_ENTITY, "\n"); 77 } 78 StringUtils()79 private StringUtils() { 80 } 81 82 } 83