Source Code Cross Referenced for StandardCollationURIResolver.java in  » XML » saxonb » net » sf » saxon » sort » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » XML » saxonb » net.sf.saxon.sort 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        package net.sf.saxon.sort;
002:
003:        import net.sf.saxon.Configuration;
004:        import net.sf.saxon.trans.XPathException;
005:
006:        import java.net.URI;
007:        import java.net.URISyntaxException;
008:        import java.text.Collator;
009:        import java.util.Comparator;
010:        import java.util.Locale;
011:        import java.util.StringTokenizer;
012:
013:        /**
014:         * StandardCollationURIResolver allows a Collation to be created given
015:         * a URI starting with "http://saxon.sf.net/collation?" followed by a set of query parameters.
016:         */
017:
018:        public class StandardCollationURIResolver implements 
019:                CollationURIResolver {
020:
021:            private static final StandardCollationURIResolver theInstance = new StandardCollationURIResolver();
022:
023:            /**
024:             * The class is a singleton
025:             */
026:            private StandardCollationURIResolver() {
027:            }
028:
029:            /**
030:             * Return the singleton instance of this class
031:             */
032:
033:            public static final StandardCollationURIResolver getInstance() {
034:                return theInstance;
035:            }
036:
037:            /**
038:             * Make a collator with given properties
039:             * @param langAtt the language
040:             * @param strengthAtt the collation strength: primary, secondary, tertiary, or identical
041:             * @param decompositionAtt whether strings are normalized into Unicode decomposed normal form:
042:             * none, standard, or full
043:             * @return the collator
044:             */
045:
046:            private static Collator makeUsingProperties(String langAtt,
047:                    String strengthAtt, String decompositionAtt) {
048:
049:                Collator collator;
050:                // Start with the lang attribute
051:
052:                if (langAtt != null) {
053:                    collator = Collator.getInstance(getLocale(langAtt));
054:                } else {
055:                    collator = Collator.getInstance(); // use default locale
056:                }
057:
058:                if (strengthAtt != null && collator instanceof  Collator) {
059:                    if (strengthAtt.equals("primary")) {
060:                        collator.setStrength(Collator.PRIMARY);
061:                    } else if (strengthAtt.equals("secondary")) {
062:                        collator.setStrength(Collator.SECONDARY);
063:                    } else if (strengthAtt.equals("tertiary")) {
064:                        collator.setStrength(Collator.TERTIARY);
065:                    } else if (strengthAtt.equals("identical")) {
066:                        collator.setStrength(Collator.IDENTICAL);
067:                    } else {
068:                        //throw new XPathException.Dynamic("Collation strength must be primary, secondary, tertiary, or identical");
069:                    }
070:                }
071:
072:                if (decompositionAtt != null && collator instanceof  Collator) {
073:                    if (decompositionAtt.equals("none")) {
074:                        collator.setDecomposition(Collator.NO_DECOMPOSITION);
075:                    } else if (decompositionAtt.equals("standard")) {
076:                        collator
077:                                .setDecomposition(Collator.CANONICAL_DECOMPOSITION);
078:                    } else if (decompositionAtt.equals("full")) {
079:                        collator.setDecomposition(Collator.FULL_DECOMPOSITION);
080:                    } else {
081:                        //throw new XPathException.Dynamic("Collation decomposition must be none, standard, or full");
082:                    }
083:                }
084:                return collator;
085:            }
086:
087:            /**
088:             * Get a locale given a language code in XML format
089:             */
090:
091:            private static Locale getLocale(String lang) {
092:                int hyphen = lang.indexOf("-");
093:                String language, country;
094:                if (hyphen < 1) {
095:                    language = lang;
096:                    country = "";
097:                } else {
098:                    language = lang.substring(1, hyphen);
099:                    country = lang.substring(hyphen + 1);
100:                }
101:                return new Locale(language, country);
102:            }
103:
104:            /**
105:             * Create a collator from a parameterized URI
106:             * @return null if the collation URI is not suitable
107:             */
108:
109:            public Comparator resolve(String uri, String base,
110:                    Configuration config) {
111:                if (uri.equals("http://saxon.sf.net/collation")) {
112:                    return makeUsingProperties(null, null, null);
113:                } else if (uri.startsWith("http://saxon.sf.net/collation?")) {
114:                    URI uuri;
115:                    try {
116:                        uuri = new URI(uri);
117:                    } catch (URISyntaxException err) {
118:                        return null;
119:                    }
120:                    String query = uuri.getQuery();
121:                    String lang = null;
122:                    String strength = null;
123:                    String decomposition = null;
124:                    String classname = null;
125:                    StringTokenizer queryTokenizer = new StringTokenizer(query,
126:                            ";&");
127:                    while (queryTokenizer.hasMoreElements()) {
128:                        String param = queryTokenizer.nextToken();
129:                        int eq = param.indexOf('=');
130:                        if (eq > 0 && eq < param.length() - 1) {
131:                            String kw = param.substring(0, eq);
132:                            String val = param.substring(eq + 1);
133:                            if (kw.equals("lang")) {
134:                                lang = val;
135:                            } else if (kw.equals("strength")) {
136:                                strength = val;
137:                            } else if (kw.equals("decomposition")) {
138:                                decomposition = val;
139:                            } else if (kw.equals("class")) {
140:                                classname = val;
141:                            }
142:                        }
143:                    }
144:                    if (classname != null) {
145:                        try {
146:                            return config.makeCollator(classname);
147:                        } catch (XPathException err) {
148:                            return null;
149:                        }
150:                    }
151:                    return makeUsingProperties(lang, strength, decomposition);
152:                } else {
153:                    return null;
154:                }
155:            }
156:
157:        }
158:
159:        //
160:        // The contents of this file are subject to the Mozilla Public License Version 1.0 (the "License");
161:        // you may not use this file except in compliance with the License. You may obtain a copy of the
162:        // License at http://www.mozilla.org/MPL/
163:        //
164:        // Software distributed under the License is distributed on an "AS IS" basis,
165:        // WITHOUT WARRANTY OF ANY KIND, either express or implied.
166:        // See the License for the specific language governing rights and limitations under the License.
167:        //
168:        // The Original Code is: all this file.
169:        //
170:        // The Initial Developer of the Original Code is Michael Kay
171:        //
172:        // Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
173:        //
174:        // Contributor(s): none.
175:        //
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