1 /** 2 * Copyright (c) 2008, http://www.snakeyaml.org 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 package org.yaml.snakeyaml.scanner; 17 18 import java.util.Arrays; 19 20 public final class Constant { 21 private final static String ALPHA_S = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-_"; 22 23 private final static String LINEBR_S = "\n\u0085\u2028\u2029"; 24 private final static String FULL_LINEBR_S = "\r" + LINEBR_S; 25 private final static String NULL_OR_LINEBR_S = "\0" + FULL_LINEBR_S; 26 private final static String NULL_BL_LINEBR_S = " " + NULL_OR_LINEBR_S; 27 private final static String NULL_BL_T_LINEBR_S = "\t" + NULL_BL_LINEBR_S; 28 private final static String NULL_BL_T_S = "\0 \t"; 29 private final static String URI_CHARS_S = ALPHA_S + "-;/?:@&=+$,_.!~*\'()[]%"; 30 31 public final static Constant LINEBR = new Constant(LINEBR_S); 32 public final static Constant FULL_LINEBR = new Constant(FULL_LINEBR_S); 33 public final static Constant NULL_OR_LINEBR = new Constant(NULL_OR_LINEBR_S); 34 public final static Constant NULL_BL_LINEBR = new Constant(NULL_BL_LINEBR_S); 35 public final static Constant NULL_BL_T_LINEBR = new Constant(NULL_BL_T_LINEBR_S); 36 public final static Constant NULL_BL_T = new Constant(NULL_BL_T_S); 37 public final static Constant URI_CHARS = new Constant(URI_CHARS_S); 38 39 public final static Constant ALPHA = new Constant(ALPHA_S); 40 41 private String content; 42 boolean[] contains = new boolean[128]; 43 boolean noASCII = false; 44 45 private Constant(String content) { 46 Arrays.fill(contains, false); 47 StringBuilder sb = new StringBuilder(); 48 for (int i = 0; i < content.length(); i++) { 49 char ch = content.charAt(i); 50 if (ch < 128) 51 contains[ch] = true; 52 else 53 sb.append(ch); 54 } 55 if (sb.length() > 0) { 56 noASCII = true; 57 this.content = sb.toString(); 58 } 59 } 60 61 public boolean has(char ch) { 62 return (ch < 128) ? contains[ch] : noASCII && content.indexOf(ch, 0) != -1; 63 } 64 65 public boolean hasNo(char ch) { 66 return !has(ch); 67 } 68 69 public boolean has(char ch, String additional) { 70 return has(ch) || additional.indexOf(ch, 0) != -1; 71 } 72 73 public boolean hasNo(char ch, String additional) { 74 return !has(ch, additional); 75 } 76 } 77
