package org.jboss.mx.util;
import java.util.HashSet;
public final class MetaDataUtil
{
public static final String BOOLEAN_TYPE_NAME = Boolean.TYPE.getName();
public static final String BYTE_TYPE_NAME = Byte.TYPE.getName();
public static final String CHAR_TYPE_NAME = Character.TYPE.getName();
public static final String DOUBLE_TYPE_NAME = Double.TYPE.getName();
public static final String FLOAT_TYPE_NAME = Float.TYPE.getName();
public static final String INT_TYPE_NAME = Integer.TYPE.getName();
public static final String LONG_TYPE_NAME = Long.TYPE.getName();
public static final String SHORT_TYPE_NAME = Short.TYPE.getName();
public static final String VOID_TYPE_NAME = Void.TYPE.getName();
private static final HashSet reserved = new HashSet();
static
{
reserved.add("assert");
reserved.add("abstract");
reserved.add("boolean");
reserved.add("break");
reserved.add("byte");
reserved.add("case");
reserved.add("catch");
reserved.add("char");
reserved.add("class");
reserved.add("const");
reserved.add("continue");
reserved.add("default");
reserved.add("do");
reserved.add("double");
reserved.add("else");
reserved.add("extends");
reserved.add("false");
reserved.add("final");
reserved.add("finally");
reserved.add("float");
reserved.add("for");
reserved.add("goto");
reserved.add("if");
reserved.add("implements");
reserved.add("import");
reserved.add("instanceof");
reserved.add("int");
reserved.add("interface");
reserved.add("long");
reserved.add("native");
reserved.add("new");
reserved.add("null");
reserved.add("package");
reserved.add("private");
reserved.add("protected");
reserved.add("public");
reserved.add("return");
reserved.add("short");
reserved.add("static");
reserved.add("strictfp");
reserved.add("super");
reserved.add("switch");
reserved.add("synchronized");
reserved.add("this");
reserved.add("throw");
reserved.add("throws");
reserved.add("transient");
reserved.add("true");
reserved.add("try");
reserved.add("void");
reserved.add("volatile");
reserved.add("while");
}
public static final boolean isValidJavaIdentifier(String string)
{
if (string == null || string.length() == 0)
return false;
final char[] chars = string.toCharArray();
if (Character.isJavaIdentifierStart(chars[0]) == false)
return false;
for (int i = 1; i < chars.length; ++i)
{
if (Character.isJavaIdentifierPart(chars[i]) == false)
return false;
}
if (reserved.contains(string))
return false;
return true;
}
public static final boolean isValidJavaType(String string)
{
if (string == null || string.length() == 0)
return false;
if (string.charAt(0) == '[')
{
String baseClassName = getBaseClassName(string);
if (baseClassName == null)
return false;
string = baseClassName;
}
if (isPrimitive(string))
return true;
final char[] chars = string.toCharArray();
int start = 0;
for (int i = 0; i < chars.length; ++i)
{
if (chars[i] == '.')
{
if (i == start)
return false;
if (isValidJavaIdentifier(string.substring(start, i)) == false)
return false;
start = i+1;
}
}
if (start < chars.length &&
isValidJavaIdentifier(string.substring(start, chars.length)) == false)
return false;
return true;
}
public static String getBaseClassName(String className)
{
final int length = className.length();
final int last = length - 1;
int i = 0;
while (i < length && className.charAt(i) == '[')
++i;
if (i > 0)
{
char type = className.charAt(i);
if (type == 'B' || type == 'C' || type == 'D' || type == 'F' ||
type == 'I' || type == 'J' || type == 'S' || type == 'Z' || type == 'V')
{
if (i != last)
return null;
return className.substring(last, length);
}
else if (className.charAt(i) != 'L' ||
i >= last-1 ||
className.charAt(last) != ';')
return null;
return className.substring(i+1, last);
}
return className;
}
public static boolean isPrimitive(String string)
{
if (string.equals(INT_TYPE_NAME))
return true;
if (string.equals(LONG_TYPE_NAME))
return true;
if (string.equals(BOOLEAN_TYPE_NAME))
return true;
if (string.equals(BYTE_TYPE_NAME))
return true;
if (string.equals(CHAR_TYPE_NAME))
return true;
if (string.equals(SHORT_TYPE_NAME))
return true;
if (string.equals(FLOAT_TYPE_NAME))
return true;
if (string.equals(DOUBLE_TYPE_NAME))
return true;
if (string.equals(VOID_TYPE_NAME))
return true;
return false;
}
}