/**
* Null out fields in this schema and its children as specified by parameters __exclude_fields and
* __include_fields. <b>NOTE: modifies the scheme tree in place.</b>
*/
public static void filterFields(Object o, String includes, String excludes) {
if (null == excludes || "".equals(excludes)) return;
if (null != includes) // not yet implemented
throw new H2OIllegalArgumentException("_include_fields", "filterFields", includes);
String[] exclude_paths = excludes.split(",");
for (String path : exclude_paths) {
// for each path. . .
int slash = path.indexOf("/");
if (-1 == slash || slash == path.length()) { // NOTE: handles trailing slash
// we've hit the end: null the field, if it exists
Field f = ReflectionUtils.findNamedField(o, path);
if (null == f)
throw new H2OIllegalArgumentException("_exclude_fields", "filterFields", path);
try {
f.set(o, null);
} catch (IllegalAccessException e) {
throw new H2OIllegalArgumentException("_exclude_fields", "filterFields", path);
}
} // hit the end of the path
else {
String first = path.substring(0, slash);
String rest = path.substring(slash + 1);
Field f = ReflectionUtils.findNamedField(o, first);
if (null == f)
throw new H2OIllegalArgumentException("_exclude_fields", "filterFields", path);
if (f.getType().isArray()
&& Object.class.isAssignableFrom(f.getType().getComponentType())) {
// recurse into the children with the "rest" of the path
try {
Object[] field_value = (Object[]) f.get(o);
for (Object child : field_value) {
filterFields(child, null, rest);
}
} catch (IllegalAccessException e) {
throw new H2OIllegalArgumentException("_exclude_fields", "filterFields", path);
}
} else if (Object.class.isAssignableFrom(f.getType())) {
// recurse into the child with the "rest" of the path
try {
Object field_value = f.get(o);
filterFields(field_value, null, rest);
} catch (IllegalAccessException e) {
throw new H2OIllegalArgumentException("_exclude_fields", "filterFields", path);
}
} else {
throw new H2OIllegalArgumentException("_exclude_fields", "filterFields", path);
}
} // need to recurse
} // foreach exclude_paths
}
