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/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tuscany.model.util;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.eclipse.emf.common.util.URI;
/**
* A utility class that converts between XML names and Java names.
*/
public class XMLNameUtil {
private static final List domains = Arrays.asList(new String[]{"COM", "com", "ORG", "org"});
/**
* Constructor
*/
private XMLNameUtil() {
super();
}
/**
* Return an EPackage name for the given namespace.
*
* @param namespace
* @return
*/
public static String getPackageNameFromNamespace(String namespace) {
URI uri = URI.createURI(namespace);
List parsedName;
if (uri.isHierarchical()) {
String host = uri.host();
if (host != null && host.startsWith("www.")) {
host = host.substring(4);
}
parsedName = parseName(host, '.');
Collections.reverse(parsedName);
if (!parsedName.isEmpty()) {
parsedName.set(0, ((String) parsedName.get(0)).toLowerCase());
}
parsedName.addAll(parseName(uri.trimFileExtension().path(), '/'));
} else {
String opaquePart = uri.opaquePart();
int index = opaquePart.indexOf(":");
if (index != -1 && "urn".equalsIgnoreCase(uri.scheme())) {
parsedName = parseName(opaquePart.substring(0, index), '-');
if (parsedName.size() > 0 && domains.contains(parsedName.get(parsedName.size() - 1))) {
Collections.reverse(parsedName);
parsedName.set(0, ((String) parsedName.get(0)).toLowerCase());
}
parsedName.addAll(parseName(opaquePart.substring(index + 1), '/'));
} else {
parsedName = parseName(opaquePart, '/');
}
}
StringBuffer qualifiedPackageName = new StringBuffer();
for (Iterator i = parsedName.iterator(); i.hasNext();) {
String packageName = (String) i.next();
if (packageName.length() > 0) {
if (qualifiedPackageName.length() > 0) {
qualifiedPackageName.append('.');
}
qualifiedPackageName.append(getJavaNameFromXMLName(packageName, false));
}
}
return qualifiedPackageName.toString();
}
/**
* Returns a namespace prefix for the given package Name
*
* @param packageName
* @return
*/
public static String getNSPrefixFromPackageName(String packageName) {
String nsPrefix = packageName;
int index = nsPrefix.lastIndexOf('.');
return index == -1 ? nsPrefix : nsPrefix.substring(index + 1);
}
/**
* Parse the given name.
*
* @param sourceName
* @param separator
* @return
*/
private static List parseName(String sourceName, char separator) {
List result = new ArrayList();
if (sourceName != null) {
StringBuffer currentWord = new StringBuffer();
boolean lastIsLower = false;
for (int index = 0, length = sourceName.length(); index < length; ++index) {
char curChar = sourceName.charAt(index);
if (!Character.isJavaIdentifierPart(curChar)) {
curChar = separator;
}
if (Character.isUpperCase(curChar) || (!lastIsLower && Character.isDigit(curChar)) || curChar == separator) {
if (lastIsLower && currentWord.length() > 1 || curChar == separator && currentWord.length() > 0) {
result.add(currentWord.toString());
currentWord = new StringBuffer();
}
lastIsLower = false;
} else {
if (!lastIsLower) {
int currentWordLength = currentWord.length();
if (currentWordLength > 1) {
char lastChar = currentWord.charAt(--currentWordLength);
currentWord.setLength(currentWordLength);
result.add(currentWord.toString());
currentWord = new StringBuffer();
currentWord.append(lastChar);
}
}
lastIsLower = true;
}
if (curChar != separator) {
currentWord.append(curChar);
}
}
result.add(currentWord.toString());
}
return result;
}
/**
* Returns a valid Java name from an XML Name
*
* @param name
* @param isUpperCase
* @return
*/
public static String getJavaNameFromXMLName(String name, boolean isUpperCase) {
List parsedName = parseName(name, '_');
StringBuffer result = new StringBuffer();
for (Iterator i = parsedName.iterator(); i.hasNext();) {
String nameComponent = (String) i.next();
if (nameComponent.length() > 0) {
if (result.length() > 0 || isUpperCase) {
result.append(Character.toUpperCase(nameComponent.charAt(0)));
result.append(nameComponent.substring(1));
} else {
result.append(nameComponent);
}
}
}
return result.length() == 0 ? "_" : Character.isJavaIdentifierStart(result.charAt(0)) ? isUpperCase ? result.toString() : decapitalizeName(result.toString()) : "_" + result;
}
/**
* Returns a valid fully qualified class name from a QName
* @param namespace
* @param name
* @return
*/
public static String getFullyQualifiedClassNameFromQName(String namespace, String name) {
return XMLNameUtil.getPackageNameFromNamespace(namespace)+'.'+XMLNameUtil.getJavaNameFromXMLName(name, true);
}
/**
* Decapitalize a name.
* @param name
* @return
*/
public static String decapitalizeName(String name) {
if (name.length() == 0) {
return name;
} else {
String lowerName = name.toLowerCase();
int i;
for (i = 0; i < name.length(); i++) {
if (name.charAt(i) == lowerName.charAt(i)) {
break;
}
}
if (i > 1 && i < name.length()) {
--i;
}
return name.substring(0, i).toLowerCase() + name.substring(i);
}
}
/**
* Capitalize a name.
* @param name
* @return
*/
public static String capitalizeName(String name) {
int l=name.length();
if (l == 0) {
return name;
} else if (l==1) {
return name.toUpperCase();
} else {
return name.substring(0, 1).toUpperCase() + name.substring(1);
}
}
}
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