Source Code Cross Referenced for XML11Char.java in  » XML » xerces-2_9_1 » org » apache » xerces » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » XML » xerces 2_9_1 » org.apache.xerces.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         * contributor license agreements.  See the NOTICE file distributed with
004:         * this work for additional information regarding copyright ownership.
005:         * The ASF licenses this file to You under the Apache License, Version 2.0
006:         * (the "License"); you may not use this file except in compliance with
007:         * the License.  You may obtain a copy of the License at
008:         * 
009:         *      http://www.apache.org/licenses/LICENSE-2.0
010:         * 
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS,
013:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         * See the License for the specific language governing permissions and
015:         * limitations under the License.
016:         */
017:
018:        package org.apache.xerces.util;
019:
020:        import java.util.Arrays;
021:
022:        /**
023:         * This class defines the basic properties of characters in XML 1.1. The data
024:         * in this class can be used to verify that a character is a valid
025:         * XML 1.1 character or if the character is a space, name start, or name
026:         * character.
027:         * <p>
028:         * A series of convenience methods are supplied to ease the burden
029:         * of the developer.  Using the character as an index into the <code>XML11CHARS</code>
030:         * array and applying the appropriate mask flag (e.g.
031:         * <code>MASK_VALID</code>), yields the same results as calling the
032:         * convenience methods. There is one exception: check the comments
033:         * for the <code>isValid</code> method for details.
034:         *
035:         * @author Glenn Marcy, IBM
036:         * @author Andy Clark, IBM
037:         * @author Arnaud  Le Hors, IBM
038:         * @author Neil Graham, IBM
039:         * @author Michael Glavassevich, IBM
040:         *
041:         * @version $Id: XML11Char.java 447241 2006-09-18 05:12:57Z mrglavas $
042:         */
043:        public class XML11Char {
044:
045:            //
046:            // Constants
047:            //
048:
049:            /** Character flags for XML 1.1. */
050:            private static final byte XML11CHARS[] = new byte[1 << 16];
051:
052:            /** XML 1.1 Valid character mask. */
053:            public static final int MASK_XML11_VALID = 0x01;
054:
055:            /** XML 1.1 Space character mask. */
056:            public static final int MASK_XML11_SPACE = 0x02;
057:
058:            /** XML 1.1 Name start character mask. */
059:            public static final int MASK_XML11_NAME_START = 0x04;
060:
061:            /** XML 1.1 Name character mask. */
062:            public static final int MASK_XML11_NAME = 0x08;
063:
064:            /** XML 1.1 control character mask */
065:            public static final int MASK_XML11_CONTROL = 0x10;
066:
067:            /** XML 1.1 content for external entities (valid - "special" chars - control chars) */
068:            public static final int MASK_XML11_CONTENT = 0x20;
069:
070:            /** XML namespaces 1.1 NCNameStart */
071:            public static final int MASK_XML11_NCNAME_START = 0x40;
072:
073:            /** XML namespaces 1.1 NCName */
074:            public static final int MASK_XML11_NCNAME = 0x80;
075:
076:            /** XML 1.1 content for internal entities (valid - "special" chars) */
077:            public static final int MASK_XML11_CONTENT_INTERNAL = MASK_XML11_CONTROL
078:                    | MASK_XML11_CONTENT;
079:
080:            //
081:            // Static initialization
082:            //
083:
084:            static {
085:
086:                // Initializing the Character Flag Array
087:                // Code generated by: XML11CharGenerator.
088:
089:                Arrays.fill(XML11CHARS, 1, 9, (byte) 17); // Fill 8 of value (byte) 17
090:                XML11CHARS[9] = 35;
091:                XML11CHARS[10] = 3;
092:                Arrays.fill(XML11CHARS, 11, 13, (byte) 17); // Fill 2 of value (byte) 17
093:                XML11CHARS[13] = 3;
094:                Arrays.fill(XML11CHARS, 14, 32, (byte) 17); // Fill 18 of value (byte) 17
095:                XML11CHARS[32] = 35;
096:                Arrays.fill(XML11CHARS, 33, 38, (byte) 33); // Fill 5 of value (byte) 33
097:                XML11CHARS[38] = 1;
098:                Arrays.fill(XML11CHARS, 39, 45, (byte) 33); // Fill 6 of value (byte) 33
099:                Arrays.fill(XML11CHARS, 45, 47, (byte) -87); // Fill 2 of value (byte) -87
100:                XML11CHARS[47] = 33;
101:                Arrays.fill(XML11CHARS, 48, 58, (byte) -87); // Fill 10 of value (byte) -87
102:                XML11CHARS[58] = 45;
103:                XML11CHARS[59] = 33;
104:                XML11CHARS[60] = 1;
105:                Arrays.fill(XML11CHARS, 61, 65, (byte) 33); // Fill 4 of value (byte) 33
106:                Arrays.fill(XML11CHARS, 65, 91, (byte) -19); // Fill 26 of value (byte) -19
107:                Arrays.fill(XML11CHARS, 91, 93, (byte) 33); // Fill 2 of value (byte) 33
108:                XML11CHARS[93] = 1;
109:                XML11CHARS[94] = 33;
110:                XML11CHARS[95] = -19;
111:                XML11CHARS[96] = 33;
112:                Arrays.fill(XML11CHARS, 97, 123, (byte) -19); // Fill 26 of value (byte) -19
113:                Arrays.fill(XML11CHARS, 123, 127, (byte) 33); // Fill 4 of value (byte) 33
114:                Arrays.fill(XML11CHARS, 127, 133, (byte) 17); // Fill 6 of value (byte) 17
115:                XML11CHARS[133] = 35;
116:                Arrays.fill(XML11CHARS, 134, 160, (byte) 17); // Fill 26 of value (byte) 17
117:                Arrays.fill(XML11CHARS, 160, 183, (byte) 33); // Fill 23 of value (byte) 33
118:                XML11CHARS[183] = -87;
119:                Arrays.fill(XML11CHARS, 184, 192, (byte) 33); // Fill 8 of value (byte) 33
120:                Arrays.fill(XML11CHARS, 192, 215, (byte) -19); // Fill 23 of value (byte) -19
121:                XML11CHARS[215] = 33;
122:                Arrays.fill(XML11CHARS, 216, 247, (byte) -19); // Fill 31 of value (byte) -19
123:                XML11CHARS[247] = 33;
124:                Arrays.fill(XML11CHARS, 248, 768, (byte) -19); // Fill 520 of value (byte) -19
125:                Arrays.fill(XML11CHARS, 768, 880, (byte) -87); // Fill 112 of value (byte) -87
126:                Arrays.fill(XML11CHARS, 880, 894, (byte) -19); // Fill 14 of value (byte) -19
127:                XML11CHARS[894] = 33;
128:                Arrays.fill(XML11CHARS, 895, 8192, (byte) -19); // Fill 7297 of value (byte) -19
129:                Arrays.fill(XML11CHARS, 8192, 8204, (byte) 33); // Fill 12 of value (byte) 33
130:                Arrays.fill(XML11CHARS, 8204, 8206, (byte) -19); // Fill 2 of value (byte) -19
131:                Arrays.fill(XML11CHARS, 8206, 8232, (byte) 33); // Fill 26 of value (byte) 33
132:                XML11CHARS[8232] = 35;
133:                Arrays.fill(XML11CHARS, 8233, 8255, (byte) 33); // Fill 22 of value (byte) 33
134:                Arrays.fill(XML11CHARS, 8255, 8257, (byte) -87); // Fill 2 of value (byte) -87
135:                Arrays.fill(XML11CHARS, 8257, 8304, (byte) 33); // Fill 47 of value (byte) 33
136:                Arrays.fill(XML11CHARS, 8304, 8592, (byte) -19); // Fill 288 of value (byte) -19
137:                Arrays.fill(XML11CHARS, 8592, 11264, (byte) 33); // Fill 2672 of value (byte) 33
138:                Arrays.fill(XML11CHARS, 11264, 12272, (byte) -19); // Fill 1008 of value (byte) -19
139:                Arrays.fill(XML11CHARS, 12272, 12289, (byte) 33); // Fill 17 of value (byte) 33
140:                Arrays.fill(XML11CHARS, 12289, 55296, (byte) -19); // Fill 43007 of value (byte) -19
141:                Arrays.fill(XML11CHARS, 57344, 63744, (byte) 33); // Fill 6400 of value (byte) 33
142:                Arrays.fill(XML11CHARS, 63744, 64976, (byte) -19); // Fill 1232 of value (byte) -19
143:                Arrays.fill(XML11CHARS, 64976, 65008, (byte) 33); // Fill 32 of value (byte) 33
144:                Arrays.fill(XML11CHARS, 65008, 65534, (byte) -19); // Fill 526 of value (byte) -19
145:
146:            } // <clinit>()
147:
148:            //
149:            // Public static methods
150:            //
151:
152:            /**
153:             * Returns true if the specified character is a space character
154:             * as amdended in the XML 1.1 specification.
155:             *
156:             * @param c The character to check.
157:             */
158:            public static boolean isXML11Space(int c) {
159:                return (c < 0x10000 && (XML11CHARS[c] & MASK_XML11_SPACE) != 0);
160:            } // isXML11Space(int):boolean
161:
162:            /**
163:             * Returns true if the specified character is valid. This method
164:             * also checks the surrogate character range from 0x10000 to 0x10FFFF.
165:             * <p>
166:             * If the program chooses to apply the mask directly to the
167:             * <code>XML11CHARS</code> array, then they are responsible for checking
168:             * the surrogate character range.
169:             *
170:             * @param c The character to check.
171:             */
172:            public static boolean isXML11Valid(int c) {
173:                return (c < 0x10000 && (XML11CHARS[c] & MASK_XML11_VALID) != 0)
174:                        || (0x10000 <= c && c <= 0x10FFFF);
175:            } // isXML11Valid(int):boolean
176:
177:            /**
178:             * Returns true if the specified character is invalid.
179:             *
180:             * @param c The character to check.
181:             */
182:            public static boolean isXML11Invalid(int c) {
183:                return !isXML11Valid(c);
184:            } // isXML11Invalid(int):boolean
185:
186:            /**
187:             * Returns true if the specified character is valid and permitted outside
188:             * of a character reference.  
189:             * That is, this method will return false for the same set as
190:             * isXML11Valid, except it also reports false for "control characters".
191:             *
192:             * @param c The character to check.
193:             */
194:            public static boolean isXML11ValidLiteral(int c) {
195:                return ((c < 0x10000 && ((XML11CHARS[c] & MASK_XML11_VALID) != 0 && (XML11CHARS[c] & MASK_XML11_CONTROL) == 0)) || (0x10000 <= c && c <= 0x10FFFF));
196:            } // isXML11ValidLiteral(int):boolean
197:
198:            /**
199:             * Returns true if the specified character can be considered 
200:             * content in an external parsed entity.
201:             *
202:             * @param c The character to check.
203:             */
204:            public static boolean isXML11Content(int c) {
205:                return (c < 0x10000 && (XML11CHARS[c] & MASK_XML11_CONTENT) != 0)
206:                        || (0x10000 <= c && c <= 0x10FFFF);
207:            } // isXML11Content(int):boolean
208:
209:            /**
210:             * Returns true if the specified character can be considered 
211:             * content in an internal parsed entity.
212:             *
213:             * @param c The character to check.
214:             */
215:            public static boolean isXML11InternalEntityContent(int c) {
216:                return (c < 0x10000 && (XML11CHARS[c] & MASK_XML11_CONTENT_INTERNAL) != 0)
217:                        || (0x10000 <= c && c <= 0x10FFFF);
218:            } // isXML11InternalEntityContent(int):boolean
219:
220:            /**
221:             * Returns true if the specified character is a valid name start
222:             * character as defined by production [4] in the XML 1.1
223:             * specification.
224:             *
225:             * @param c The character to check.
226:             */
227:            public static boolean isXML11NameStart(int c) {
228:                return (c < 0x10000 && (XML11CHARS[c] & MASK_XML11_NAME_START) != 0)
229:                        || (0x10000 <= c && c < 0xF0000);
230:            } // isXML11NameStart(int):boolean
231:
232:            /**
233:             * Returns true if the specified character is a valid name
234:             * character as defined by production [4a] in the XML 1.1
235:             * specification.
236:             *
237:             * @param c The character to check.
238:             */
239:            public static boolean isXML11Name(int c) {
240:                return (c < 0x10000 && (XML11CHARS[c] & MASK_XML11_NAME) != 0)
241:                        || (c >= 0x10000 && c < 0xF0000);
242:            } // isXML11Name(int):boolean
243:
244:            /**
245:             * Returns true if the specified character is a valid NCName start
246:             * character as defined by production [4] in Namespaces in XML
247:             * 1.1 recommendation.
248:             *
249:             * @param c The character to check.
250:             */
251:            public static boolean isXML11NCNameStart(int c) {
252:                return (c < 0x10000 && (XML11CHARS[c] & MASK_XML11_NCNAME_START) != 0)
253:                        || (0x10000 <= c && c < 0xF0000);
254:            } // isXML11NCNameStart(int):boolean
255:
256:            /**
257:             * Returns true if the specified character is a valid NCName
258:             * character as defined by production [5] in Namespaces in XML
259:             * 1.1 recommendation.
260:             *
261:             * @param c The character to check.
262:             */
263:            public static boolean isXML11NCName(int c) {
264:                return (c < 0x10000 && (XML11CHARS[c] & MASK_XML11_NCNAME) != 0)
265:                        || (0x10000 <= c && c < 0xF0000);
266:            } // isXML11NCName(int):boolean
267:
268:            /**
269:             * Returns whether the given character is a valid 
270:             * high surrogate for a name character. This includes
271:             * all high surrogates for characters [0x10000-0xEFFFF].
272:             * In other words everything excluding planes 15 and 16.
273:             *
274:             * @param c The character to check.
275:             */
276:            public static boolean isXML11NameHighSurrogate(int c) {
277:                return (0xD800 <= c && c <= 0xDB7F);
278:            }
279:
280:            /*
281:             * [5] Name ::= NameStartChar NameChar*
282:             */
283:            /**
284:             * Check to see if a string is a valid Name according to [5]
285:             * in the XML 1.1 Recommendation
286:             *
287:             * @param name string to check
288:             * @return true if name is a valid Name
289:             */
290:            public static boolean isXML11ValidName(String name) {
291:                int length = name.length();
292:                if (length == 0)
293:                    return false;
294:                int i = 1;
295:                char ch = name.charAt(0);
296:                if (!isXML11NameStart(ch)) {
297:                    if (length > 1 && isXML11NameHighSurrogate(ch)) {
298:                        char ch2 = name.charAt(1);
299:                        if (!XMLChar.isLowSurrogate(ch2)
300:                                || !isXML11NameStart(XMLChar.supplemental(ch,
301:                                        ch2))) {
302:                            return false;
303:                        }
304:                        i = 2;
305:                    } else {
306:                        return false;
307:                    }
308:                }
309:                while (i < length) {
310:                    ch = name.charAt(i);
311:                    if (!isXML11Name(ch)) {
312:                        if (++i < length && isXML11NameHighSurrogate(ch)) {
313:                            char ch2 = name.charAt(i);
314:                            if (!XMLChar.isLowSurrogate(ch2)
315:                                    || !isXML11Name(XMLChar.supplemental(ch,
316:                                            ch2))) {
317:                                return false;
318:                            }
319:                        } else {
320:                            return false;
321:                        }
322:                    }
323:                    ++i;
324:                }
325:                return true;
326:            } // isXML11ValidName(String):boolean
327:
328:            /*
329:             * from the namespace 1.1 rec
330:             * [4] NCName ::= NCNameStartChar NCNameChar*
331:             */
332:            /**
333:             * Check to see if a string is a valid NCName according to [4]
334:             * from the XML Namespaces 1.1 Recommendation
335:             *
336:             * @param ncName string to check
337:             * @return true if name is a valid NCName
338:             */
339:            public static boolean isXML11ValidNCName(String ncName) {
340:                int length = ncName.length();
341:                if (length == 0)
342:                    return false;
343:                int i = 1;
344:                char ch = ncName.charAt(0);
345:                if (!isXML11NCNameStart(ch)) {
346:                    if (length > 1 && isXML11NameHighSurrogate(ch)) {
347:                        char ch2 = ncName.charAt(1);
348:                        if (!XMLChar.isLowSurrogate(ch2)
349:                                || !isXML11NCNameStart(XMLChar.supplemental(ch,
350:                                        ch2))) {
351:                            return false;
352:                        }
353:                        i = 2;
354:                    } else {
355:                        return false;
356:                    }
357:                }
358:                while (i < length) {
359:                    ch = ncName.charAt(i);
360:                    if (!isXML11NCName(ch)) {
361:                        if (++i < length && isXML11NameHighSurrogate(ch)) {
362:                            char ch2 = ncName.charAt(i);
363:                            if (!XMLChar.isLowSurrogate(ch2)
364:                                    || !isXML11NCName(XMLChar.supplemental(ch,
365:                                            ch2))) {
366:                                return false;
367:                            }
368:                        } else {
369:                            return false;
370:                        }
371:                    }
372:                    ++i;
373:                }
374:                return true;
375:            } // isXML11ValidNCName(String):boolean
376:
377:            /*
378:             * [7] Nmtoken ::= (NameChar)+
379:             */
380:            /**
381:             * Check to see if a string is a valid Nmtoken according to [7]
382:             * in the XML 1.1 Recommendation
383:             *
384:             * @param nmtoken string to check
385:             * @return true if nmtoken is a valid Nmtoken 
386:             */
387:            public static boolean isXML11ValidNmtoken(String nmtoken) {
388:                int length = nmtoken.length();
389:                if (length == 0)
390:                    return false;
391:                for (int i = 0; i < length; ++i) {
392:                    char ch = nmtoken.charAt(i);
393:                    if (!isXML11Name(ch)) {
394:                        if (++i < length && isXML11NameHighSurrogate(ch)) {
395:                            char ch2 = nmtoken.charAt(i);
396:                            if (!XMLChar.isLowSurrogate(ch2)
397:                                    || !isXML11Name(XMLChar.supplemental(ch,
398:                                            ch2))) {
399:                                return false;
400:                            }
401:                        } else {
402:                            return false;
403:                        }
404:                    }
405:                }
406:                return true;
407:            } // isXML11ValidName(String):boolean
408:
409:        } // class XML11Char
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