La conversion de la Chaîne de Pointeur pour JNA

J'ai résolu le problème en copiant le code source pour les colis-privé NativeString classe et en créant une copie de mon projet. J'ai dû faire une modification mineure en raison de l'utilisation d'un colis-privé de la méthode dans le constructeur.

Mise à jour: Comme @fragorl notes dans les commentaires, la mise en œuvre de NativeString indiqué ci-dessous est maintenant tout à fait out-of-date.

Utilisation:

private static TRUSTEE createTrusteeForCurrentUser() {
    TRUSTEE result = new TRUSTEE();
    result.TrusteeForm = TRUSTEE_FORM.TRUSTEE_IS_NAME;
    result.TrusteeType = TRUSTEE_TYPE.TRUSTEE_IS_USER;
    result.ptstrName = new NativeString("CURRENT_USER",true).getPointer();
    result.write();
    return result;
}

NativeString.java:

/** Provides a temporary allocation of an immutable C string 
* (<code>const char*</code> or <code>const wchar_t*</code>) for use when 
* converting a Java String into a native memory function argument.  
*
* @author  Todd Fast, [email protected]
* @author [email protected]
*/
public class NativeString implements CharSequence, Comparable {
private Pointer pointer;
private boolean wide;
/** Create a native string (NUL-terminated array of <code>char</code>).<p>
* If the system property <code>jna.encoding</code> is set, its value will
* be used to encode the native string.  If not set or if the encoding
* is unavailable, the default platform encoding will be used. 
*/
public NativeString(String string) {
this(string, false);
}
/** Create a native string as a NUL-terminated array of <code>wchar_t</code>
* (if <code>wide</code> is true) or <code>char</code>.<p>
* If the system property <code>jna.encoding</code> is set, its value will
* be used to encode the native <code>char</code>string.  
* If not set or if the encoding is unavailable, the default platform 
* encoding will be used. 
* 
* @param string value to write to native memory
* @param wide whether to store the String as <code>wchar_t</code>
*/
public NativeString(String string, boolean wide) {
if (string == null) {
throw new NullPointerException("String must not be null");
}
//Allocate the memory to hold the string.  Note, we have to
//make this 1 element longer in order to accommodate the terminating 
//NUL (which is generated in Pointer.setString()).
this.wide = wide;
if (wide) {
int len = (string.length() + 1 ) * Native.WCHAR_SIZE;
pointer = new Memory(len);
pointer.setString(0, string, true);
}
else {
byte[] data = Native.toByteArray(string);
pointer = new Memory(data.length + 1);
pointer.write(0, data, 0, data.length);
pointer.setByte(data.length, (byte)0);
}
}
public int hashCode() {
return toString().hashCode();
}
public boolean equals(Object other) {
if (other instanceof CharSequence) {
return compareTo(other) == 0;
}
return false;
}
public String toString() {
String s = wide ? "const wchar_t*" : "const char*";
s += "(" + pointer.getString(0, wide) + ")";
return s;
}
public Pointer getPointer() {
return pointer;
}
public char charAt(int index) {
return toString().charAt(index);
}
public int length() {
return toString().length();
}
public CharSequence subSequence(int start, int end) {
return CharBuffer.wrap(toString()).subSequence(start, end);
}
public int compareTo(Object other) {
if (other == null)
return 1;
return toString().compareTo(other.toString());
}
}