/*******************************************************************************
* Copyright (c) 2012 BMW Car IT and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*******************************************************************************/
package org.jnario.runner;
import java.lang.reflect.Method;
import org.eclipse.xtext.xbase.lib.Exceptions;
/**
* A converter from {@link Named} annotation values to unicode strings.
*
* @author Sebastian Benz - Initial contribution and API
*/
public class NameProvider {
public static NameProvider create(){
return new NameProvider();
}
public String nameOf(Method javaMethod) {
return nameOf(javaMethod.getAnnotation(Named.class), javaMethod.getName());
}
private String nameOf(Named named, String defaultName) {
return named == null ? defaultName : convertFromJavaString(named.value(), true);
}
public String nameOf(Class<?> javaClass) {
return nameOf(javaClass.getAnnotation(Named.class), javaClass.getName());
}
/**
* Mostly copied from {@link java.util.Properties#loadConvert}
*/
private String convertFromJavaString(String javaString, boolean useUnicode) {
if(javaString == null) return "";
char[] in = javaString.toCharArray();
int off = 0;
int len = javaString.length();
char[] convtBuf = new char[len];
char aChar;
char[] out = convtBuf;
int outLen = 0;
int end = off + len;
while (off < end) {
aChar = in[off++];
if (aChar == '\\') {
aChar = in[off++];
if (useUnicode && aChar == 'u') {
// Read the xxxx
int value = 0;
if(off+4 > end)
throw new IllegalArgumentException("Malformed \\uxxxx encoding.");
for (int i = 0; i < 4; i++) {
aChar = in[off++];
switch (aChar) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
value = (value << 4) + aChar - '0';
break;
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
value = (value << 4) + 10 + aChar - 'a';
break;
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
value = (value << 4) + 10 + aChar - 'A';
break;
default:
throw new IllegalArgumentException("Malformed \\uxxxx encoding.");
}
}
out[outLen++] = (char) value;
} else {
if (aChar == 't')
aChar = '\t';
else if (aChar == 'r')
aChar = '\r';
else if (aChar == 'n')
aChar = '\n';
else if (aChar == 'f')
aChar = '\f';
else if (aChar == 'b')
aChar = '\b';
else if (aChar == '"')
aChar = '\"';
else if (aChar == '\'')
aChar = '\'';
else if (aChar == '\\')
aChar = '\\';
else
throw new IllegalArgumentException("Illegal escape character \\" + aChar);
out[outLen++] = aChar;
}
} else {
out[outLen++] = aChar;
}
}
return new String(out, 0, outLen);
}
public String nameOf(Class<?> javaClass, String methodName) {
try {
Method method = javaClass.getMethod(methodName);
return nameOf(method);
} catch (SecurityException e) {
Exceptions.sneakyThrow(e);
} catch (NoSuchMethodException e) {
Exceptions.sneakyThrow(e);
}
return methodName;
}
}