/**
* Unset a field referenced by a fpath if it exists, otherwise ignore.
*
* @param fpath dot-separated field path (i.e. 63.2)
* @throws ISOException
*/
public void unset(String fpath) throws ISOException {
StringTokenizer st = new StringTokenizer(fpath, ".");
ISOMsg m = this;
ISOMsg lastm = m;
int fldno = -1;
int lastfldno;
for (; ; ) {
lastfldno = fldno;
fldno = Integer.parseInt(st.nextToken());
if (st.hasMoreTokens()) {
Object obj = m.getValue(fldno);
if (obj instanceof ISOMsg) {
lastm = m;
m = (ISOMsg) obj;
} else {
// No real way of unset further subfield, exit. Perhaps should be ISOException?
break;
}
} else {
m.unset(fldno);
if (m.hasFields() == false && (lastfldno != -1)) {
lastm.unset(lastfldno);
}
break;
}
}
}
/**
* Creates an ISOField associated with fldno within this ISOMsg
*
* @param fpath dot-separated field path (i.e. 63.2)
* @param c component
*/
public void set(String fpath, ISOComponent c) throws ISOException {
StringTokenizer st = new StringTokenizer(fpath, ".");
ISOMsg m = this;
for (; ; ) {
int fldno = Integer.parseInt(st.nextToken());
if (st.hasMoreTokens()) {
Object obj = m.getValue(fldno);
if (obj instanceof ISOMsg) m = (ISOMsg) obj;
else
/*
* we need to go deeper, however, if the value == null then
* there is nothing to do (unset) at the lower levels, so break now and save some processing.
*/
if (c == null) {
break;
} else {
// We have a value to set, so adding a level to hold it is sensible.
m.set(m = new ISOMsg(fldno));
}
} else {
m.set(c);
break;
}
}
}
/**
* Return the object value associated with the given field path
*
* @param fpath field path
* @return the field Object (may be null)
*/
public Object getValue(String fpath) throws ISOException {
StringTokenizer st = new StringTokenizer(fpath, ".");
ISOMsg m = this;
Object obj;
for (; ; ) {
int fldno = Integer.parseInt(st.nextToken());
obj = m.getValue(fldno);
if (st.hasMoreTokens()) {
if (obj instanceof ISOMsg) {
m = (ISOMsg) obj;
} else throw new ISOException("Invalid path '" + fpath + "'");
} else break;
}
return obj;
}
/**
* Creates an ISOField associated with fldno within this ISOMsg
*
* @param fpath dot-separated field path (i.e. 63.2)
* @param value binary field value
*/
public void set(String fpath, byte[] value) throws ISOException {
StringTokenizer st = new StringTokenizer(fpath, ".");
ISOMsg m = this;
for (; ; ) {
int fldno = Integer.parseInt(st.nextToken());
if (st.hasMoreTokens()) {
Object obj = m.getValue(fldno);
if (obj instanceof ISOMsg) m = (ISOMsg) obj;
else m.set(m = new ISOMsg(fldno));
} else {
m.set(fldno, value);
break;
}
}
}
/**
* Check if a field indicated by a fpath is present
*
* @param fpath dot-separated field path (i.e. 63.2)
*/
public boolean hasField(String fpath) throws ISOException {
StringTokenizer st = new StringTokenizer(fpath, ".");
ISOMsg m = this;
for (; ; ) {
int fldno = Integer.parseInt(st.nextToken());
if (st.hasMoreTokens()) {
Object obj = m.getValue(fldno);
if (obj instanceof ISOMsg) {
m = (ISOMsg) obj;
} else {
// No real way of checking for further subfields, return false, perhaps should be
// ISOException?
return false;
}
} else {
return m.hasField(fldno);
}
}
}