spinjar.com.sun.xml.bind.api.impl.NameUtil Maven / Gradle / Ivy
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package com.sun.xml.bind.api.impl;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
/**
* Methods that convert strings into various formats.
*
*
* What JAX-RPC name binding tells us is that even such basic method
* like "isLetter" can be different depending on the situation.
*
* For this reason, a whole lot of methods are made non-static,
* even though they look like they should be static.
*/
class NameUtil {
protected boolean isPunct(char c) {
return c == '-' || c == '.' || c == ':' || c == '_' || c == '\u00b7' || c == '\u0387' || c == '\u06dd' || c == '\u06de';
}
protected static boolean isDigit(char c) {
return c >= '0' && c <= '9' || Character.isDigit(c);
}
protected static boolean isUpper(char c) {
return c >= 'A' && c <= 'Z' || Character.isUpperCase(c);
}
protected static boolean isLower(char c) {
return c >= 'a' && c <= 'z' || Character.isLowerCase(c);
}
protected boolean isLetter(char c) {
return c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z' || Character.isLetter(c);
}
private String toLowerCase(String s)
{
return s.toLowerCase(Locale.ENGLISH);
}
private String toUpperCase(char c)
{
return String.valueOf(c).toUpperCase(Locale.ENGLISH);
}
private String toUpperCase(String s)
{
return s.toUpperCase(Locale.ENGLISH);
}
/**
* Capitalizes the first character of the specified string,
* and de-capitalize the rest of characters.
*/
public String capitalize(String s) {
if (!isLower(s.charAt(0)))
return s;
StringBuilder sb = new StringBuilder(s.length());
sb.append(toUpperCase(s.charAt(0)));
sb.append(toLowerCase(s.substring(1)));
return sb.toString();
}
// Precondition: s[start] is not punctuation
private int nextBreak(String s, int start) {
int n = s.length();
char c1 = s.charAt(start);
int t1 = classify(c1);
for (int i=start+1; i
* This method uses a change in character type as a splitter
* of two words. For example, "abc100ghi" will be splitted into
* {"Abc", "100","Ghi"}.
*/
public List toWordList(String s) {
ArrayList ss = new ArrayList();
int n = s.length();
for (int i = 0; i < n;) {
// Skip punctuation
while (i < n) {
if (!isPunct(s.charAt(i)))
break;
i++;
}
if (i >= n) break;
// Find next break and collect word
int b = nextBreak(s, i);
String w = (b == -1) ? s.substring(i) : s.substring(i, b);
ss.add(escape(capitalize(w)));
if (b == -1) break;
i = b;
}
// we can't guarantee a valid Java identifier anyway,
// so there's not much point in rejecting things in this way.
// if (ss.size() == 0)
// throw new IllegalArgumentException("Zero-length identifier");
return ss;
}
protected String toMixedCaseName(List ss, boolean startUpper) {
StringBuilder sb = new StringBuilder();
if(!ss.isEmpty()) {
sb.append(startUpper ? ss.get(0) : toLowerCase(ss.get(0)));
for (int i = 1; i < ss.size(); i++)
sb.append(ss.get(i));
}
return sb.toString();
}
protected String toMixedCaseVariableName(String[] ss,
boolean startUpper,
boolean cdrUpper) {
if (cdrUpper)
for (int i = 1; i < ss.length; i++)
ss[i] = capitalize(ss[i]);
StringBuilder sb = new StringBuilder();
if( ss.length>0 ) {
sb.append(startUpper ? ss[0] : toLowerCase(ss[0]));
for (int i = 1; i < ss.length; i++)
sb.append(ss[i]);
}
return sb.toString();
}
/**
* Formats a string into "THIS_KIND_OF_FORMAT_ABC_DEF".
*
* @return
* Always return a string but there's no guarantee that
* the generated code is a valid Java identifier.
*/
public String toConstantName(String s) {
return toConstantName(toWordList(s));
}
/**
* Formats a string into "THIS_KIND_OF_FORMAT_ABC_DEF".
*
* @return
* Always return a string but there's no guarantee that
* the generated code is a valid Java identifier.
*/
public String toConstantName(List ss) {
StringBuilder sb = new StringBuilder();
if( !ss.isEmpty() ) {
sb.append(toUpperCase(ss.get(0)));
for (int i = 1; i < ss.size(); i++) {
sb.append('_');
sb.append(toUpperCase(ss.get(i)));
}
}
return sb.toString();
}
/**
* Escapes characters is the given string so that they can be
* printed by only using US-ASCII characters.
*
* The escaped characters will be appended to the given
* StringBuffer.
*
* @param sb
* StringBuffer that receives escaped string.
* @param s
* String to be escaped. s.substring(start)
* will be escaped and copied to the string buffer.
*/
public static void escape(StringBuilder sb, String s, int start) {
int n = s.length();
for (int i = start; i < n; i++) {
char c = s.charAt(i);
if (Character.isJavaIdentifierPart(c))
sb.append(c);
else {
sb.append('_');
if (c <= '\u000f') sb.append("000");
else if (c <= '\u00ff') sb.append("00");
else if (c <= '\u0fff') sb.append('0');
sb.append(Integer.toString(c, 16));
}
}
}
/**
* Escapes characters that are unusable as Java identifiers
* by replacing unsafe characters with safe characters.
*/
private static String escape(String s) {
int n = s.length();
for (int i = 0; i < n; i++)
if (!Character.isJavaIdentifierPart(s.charAt(i))) {
StringBuilder sb = new StringBuilder(s.substring(0, i));
escape(sb, s, i);
return sb.toString();
}
return s;
}
/**
* 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 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;
}
/** 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 word : words)
reservedKeywords.add(word);
}
}