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* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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*
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*/
package com.sun.codemodel;
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;
}
/**
* Experimental API: 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)
*
* 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"
*
* 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=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 reservedKeywords = new HashSet();
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