| /* |
| * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.codemodel.internal; |
| |
| import java.util.HashSet; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| /** |
| * Utility methods that convert arbitrary strings into Java identifiers. |
| */ |
| public class JJavaName { |
| |
| |
| /** |
| * Checks if a given string is usable as a Java identifier. |
| */ |
| public static boolean isJavaIdentifier(String s) { |
| if(s.length()==0) return false; |
| if( reservedKeywords.contains(s) ) return false; |
| |
| if(!Character.isJavaIdentifierStart(s.charAt(0))) return false; |
| |
| for (int i = 1; i < s.length(); i++) |
| if (!Character.isJavaIdentifierPart(s.charAt(i))) |
| return false; |
| |
| return true; |
| } |
| |
| /** |
| * Checks if the given string is a valid fully qualified name. |
| */ |
| public static boolean isFullyQualifiedClassName(String s) { |
| return isJavaPackageName(s); |
| } |
| |
| /** |
| * Checks if the given string is a valid Java package name. |
| */ |
| public static boolean isJavaPackageName(String s) { |
| while(s.length()!=0) { |
| int idx = s.indexOf('.'); |
| if(idx==-1) idx=s.length(); |
| if( !isJavaIdentifier(s.substring(0,idx)) ) |
| return false; |
| |
| s = s.substring(idx); |
| if(s.length()!=0) s = s.substring(1); // remove '.' |
| } |
| return true; |
| } |
| |
| /** |
| * <b>Experimental API:</b> converts an English word into a plural form. |
| * |
| * @param word |
| * a word, such as "child", "apple". Must not be null. |
| * It accepts word concatanation forms |
| * that are common in programming languages, such as "my_child", "MyChild", |
| * "myChild", "MY-CHILD", "CODE003-child", etc, and mostly tries to do the right thing. |
| * ("my_children","MyChildren","myChildren", and "MY-CHILDREN", "CODE003-children" respectively) |
| * <p> |
| * Although this method only works for English words, it handles non-English |
| * words gracefully (by just returning it as-is.) For example, 日本語 |
| * will be returned as-is without modified, not "日本語s" |
| * <p> |
| * This method doesn't handle suffixes very well. For example, passing |
| * "person56" will return "person56s", not "people56". |
| * |
| * @return |
| * always non-null. |
| */ |
| public static String getPluralForm(String word) { |
| // remember the casing of the word |
| boolean allUpper = true; |
| |
| // check if the word looks like an English word. |
| // if we see non-ASCII characters, abort |
| for(int i=0; i<word.length(); i++ ) { |
| char ch = word.charAt(i); |
| if(ch >=0x80) |
| return word; |
| |
| // note that this isn't the same as allUpper &= Character.isUpperCase(ch); |
| allUpper &= !Character.isLowerCase(ch); |
| } |
| |
| for (Entry e : TABLE) { |
| String r = e.apply(word); |
| if(r!=null) { |
| if(allUpper) r=r.toUpperCase(); |
| return r; |
| } |
| } |
| |
| // failed |
| return word; |
| } |
| |
| |
| /** All reserved keywords of Java. */ |
| private static HashSet<String> reservedKeywords = new HashSet<String>(); |
| |
| static { |
| // see http://java.sun.com/docs/books/tutorial/java/nutsandbolts/_keywords.html |
| String[] words = new String[]{ |
| "abstract", |
| "boolean", |
| "break", |
| "byte", |
| "case", |
| "catch", |
| "char", |
| "class", |
| "const", |
| "continue", |
| "default", |
| "do", |
| "double", |
| "else", |
| "extends", |
| "final", |
| "finally", |
| "float", |
| "for", |
| "goto", |
| "if", |
| "implements", |
| "import", |
| "instanceof", |
| "int", |
| "interface", |
| "long", |
| "native", |
| "new", |
| "package", |
| "private", |
| "protected", |
| "public", |
| "return", |
| "short", |
| "static", |
| "strictfp", |
| "super", |
| "switch", |
| "synchronized", |
| "this", |
| "throw", |
| "throws", |
| "transient", |
| "try", |
| "void", |
| "volatile", |
| "while", |
| |
| // technically these are not reserved words but they cannot be used as identifiers. |
| "true", |
| "false", |
| "null", |
| |
| // and I believe assert is also a new keyword |
| "assert", |
| |
| // and 5.0 keywords |
| "enum" |
| }; |
| for (String w : words) |
| reservedKeywords.add(w); |
| } |
| |
| |
| private static class Entry { |
| private final Pattern pattern; |
| private final String replacement; |
| |
| public Entry(String pattern, String replacement) { |
| this.pattern = Pattern.compile(pattern,Pattern.CASE_INSENSITIVE); |
| this.replacement = replacement; |
| } |
| |
| String apply(String word) { |
| Matcher m = pattern.matcher(word); |
| if(m.matches()) { |
| StringBuffer buf = new StringBuffer(); |
| m.appendReplacement(buf,replacement); |
| return buf.toString(); |
| } else { |
| return null; |
| } |
| } |
| } |
| |
| private static final Entry[] TABLE; |
| |
| static { |
| String[] source = { |
| "(.*)child","$1children", |
| "(.+)fe","$1ves", |
| "(.*)mouse","$1mise", |
| "(.+)f","$1ves", |
| "(.+)ch","$1ches", |
| "(.+)sh","$1shes", |
| "(.*)tooth","$1teeth", |
| "(.+)um","$1a", |
| "(.+)an","$1en", |
| "(.+)ato","$1atoes", |
| "(.*)basis","$1bases", |
| "(.*)axis","$1axes", |
| "(.+)is","$1ises", |
| "(.+)ss","$1sses", |
| "(.+)us","$1uses", |
| "(.+)s","$1s", |
| "(.*)foot","$1feet", |
| "(.+)ix","$1ixes", |
| "(.+)ex","$1ices", |
| "(.+)nx","$1nxes", |
| "(.+)x","$1xes", |
| "(.+)y","$1ies", |
| "(.+)","$1s", |
| }; |
| |
| TABLE = new Entry[source.length/2]; |
| |
| for( int i=0; i<source.length; i+=2 ) { |
| TABLE[i/2] = new Entry(source[i],source[i+1]); |
| } |
| } |
| } |