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/*
* Copyright (c) 1997, 2021 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package com.sun.xml.bind.api.impl;
import javax.lang.model.SourceVersion;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
/**
* Converts aribitrary strings into Java identifiers.
*
* @author
* Kohsuke KAWAGUCHI
*/
public interface NameConverter
{
/**
* converts a string into an identifier suitable for classes.
*
* In general, this operation should generate "NamesLikeThis".
*/
String toClassName( String token );
/**
* converts a string into an identifier suitable for interfaces.
*
* In general, this operation should generate "NamesLikeThis".
* But for example, it can prepend every interface with 'I'.
*/
String toInterfaceName( String token );
/**
* converts a string into an identifier suitable for properties.
*
* In general, this operation should generate "NamesLikeThis",
* which will be used with known prefixes like "get" or "set".
*/
String toPropertyName( String token );
/**
* converts a string into an identifier suitable for constants.
*
* In the standard Java naming convention, this operation should
* generate "NAMES_LIKE_THIS".
*/
String toConstantName( String token );
/**
* Converts a string into an identifier suitable for variables.
*
* In general it should generate "namesLikeThis".
*/
String toVariableName( String token );
/**
* Converts a namespace URI into a package name.
* This method should expect strings like
* "http://foo.bar.zot/org", "urn:abc:def:ghi" "", or even "###"
* (basically anything) and expected to return a package name,
* liks "org.acme.foo".
*
*/
String toPackageName( String namespaceUri );
/**
* The name converter implemented by Code Model.
*
* This is the standard name conversion for JAXB.
*/
public static final NameConverter standard = new Standard();
static class Standard extends NameUtil implements NameConverter {
public String toClassName(String s) {
return toMixedCaseName(toWordList(s), true);
}
public String toVariableName(String s) {
return toMixedCaseName(toWordList(s), false);
}
public String toInterfaceName( String token ) {
return toClassName(token);
}
public String toPropertyName(String s) {
String prop = toClassName(s);
// property name "Class" with collide with Object.getClass,
// so escape this.
if(prop.equals("Class"))
prop = "Clazz";
return prop;
}
public String toConstantName( String token ) {
return super.toConstantName(token);
}
/**
* Computes a Java package name from a namespace URI,
* as specified in the spec.
*
* @return
* null if it fails to derive a package name.
*/
public String toPackageName( String nsUri ) {
// remove scheme and :, if present
// spec only requires us to remove 'http' and 'urn'...
int idx = nsUri.indexOf(':');
String scheme = "";
if(idx>=0) {
scheme = nsUri.substring(0,idx);
if( scheme.equalsIgnoreCase("http") || scheme.equalsIgnoreCase("urn") )
nsUri = nsUri.substring(idx+1);
}
// tokenize string
ArrayList tokens = tokenize( nsUri, "/: " );
if( tokens.size() == 0 ) {
return null;
}
// remove trailing file type, if necessary
if( tokens.size() > 1 ) {
// for uri's like "www.foo.com" and "foo.com", there is no trailing
// file, so there's no need to look at the last '.' and substring
// otherwise, we loose the "com" (which would be wrong)
String lastToken = tokens.get( tokens.size()-1 );
idx = lastToken.lastIndexOf( '.' );
if( idx > 0 ) {
lastToken = lastToken.substring( 0, idx );
tokens.set( tokens.size()-1, lastToken );
}
}
// tokenize domain name and reverse. Also remove :port if it exists
String domain = tokens.get( 0 );
idx = domain.indexOf(':');
if( idx >= 0) domain = domain.substring(0, idx);
ArrayList r = reverse( tokenize( domain, scheme.equals("urn")?".-":"." ) );
if( r.get( r.size()-1 ).equalsIgnoreCase( "www" ) ) {
// remove leading www
r.remove( r.size()-1 );
}
// replace the domain name with tokenized items
tokens.addAll( 1, r );
tokens.remove( 0 );
// iterate through the tokens and apply xml->java name algorithm
for( int i = 0; i < tokens.size(); i++ ) {
// get the token and remove illegal chars
String token = tokens.get( i );
token = removeIllegalIdentifierChars( token );
// this will check for reserved keywords
if (SourceVersion.isKeyword(token.toLowerCase())) {
token = '_' + token;
}
tokens.set( i, token.toLowerCase() );
}
// concat all the pieces and return it
return combine( tokens, '.' );
}
private static String removeIllegalIdentifierChars(String token) {
StringBuilder newToken = new StringBuilder(token.length() + 1); // max expected length
for( int i = 0; i < token.length(); i++ ) {
char c = token.charAt( i );
if (i == 0 && !Character.isJavaIdentifierStart(c)) { // c can't be used as FIRST char
newToken.append('_');
}
if (!Character.isJavaIdentifierPart(c)) { // c can't be used
newToken.append('_');
} else {
newToken.append(c); // c is valid
}
}
return newToken.toString();
}
private static ArrayList tokenize( String str, String sep ) {
StringTokenizer tokens = new StringTokenizer(str,sep);
ArrayList r = new ArrayList();
while(tokens.hasMoreTokens())
r.add( tokens.nextToken() );
return r;
}
private static ArrayList reverse( List a ) {
ArrayList r = new ArrayList();
for( int i=a.size()-1; i>=0; i-- )
r.add( a.get(i) );
return r;
}
private static String combine( List r, char sep ) {
StringBuilder buf = new StringBuilder(r.get(0).toString());
for( int i=1; i
