/**
* Makes this instance in effect a reference to another FilterChain instance.
*
* <p>You must not set another attribute or nest elements inside this element if you make it a
* reference.
*
* @param r the reference to which this instance is associated
* @exception BuildException if this instance already has been configured.
*/
public void setRefid(Reference r) throws BuildException {
if (!filterReaders.isEmpty()) {
throw tooManyAttributes();
}
// change this to get the objects from the other reference
Object o = r.getReferencedObject(getProject());
if (o instanceof FilterChain) {
FilterChain fc = (FilterChain) o;
filterReaders = fc.getFilterReaders();
} else {
String msg = r.getRefId() + " doesn\'t refer to a FilterChain";
throw new BuildException(msg);
}
super.setRefid(r);
}
/**
* Assemble the reader
*
* @return the assembled reader
* @exception BuildException if an error occurs
*/
public Reader getAssembledReader() throws BuildException {
if (primaryReader == null) {
throw new BuildException("primaryReader must not be null.");
}
Reader instream = primaryReader;
final int filterReadersCount = filterChains.size();
final Vector finalFilters = new Vector();
final ArrayList /*<AntClassLoader>*/ classLoadersToCleanUp =
new ArrayList /*<AntClassLoader>*/();
for (int i = 0; i < filterReadersCount; i++) {
final FilterChain filterchain = (FilterChain) filterChains.elementAt(i);
final Vector filterReaders = filterchain.getFilterReaders();
final int readerCount = filterReaders.size();
for (int j = 0; j < readerCount; j++) {
finalFilters.addElement(filterReaders.elementAt(j));
}
}
final int filtersCount = finalFilters.size();
if (filtersCount > 0) {
boolean success = false;
try {
for (int i = 0; i < filtersCount; i++) {
Object o = finalFilters.elementAt(i);
if (o instanceof AntFilterReader) {
instream =
expandReader(
(AntFilterReader) finalFilters.elementAt(i), instream, classLoadersToCleanUp);
} else if (o instanceof ChainableReader) {
setProjectOnObject(o);
instream = ((ChainableReader) o).chain(instream);
setProjectOnObject(instream);
}
}
success = true;
} finally {
if (!success && classLoadersToCleanUp.size() > 0) {
cleanUpClassLoaders(classLoadersToCleanUp);
}
}
}
final Reader finalReader = instream;
return classLoadersToCleanUp.size() == 0
? finalReader
: new FilterReader(finalReader) {
public void close() throws IOException {
FileUtils.close(in);
cleanUpClassLoaders(classLoadersToCleanUp);
}
protected void finalize() throws Throwable {
try {
close();
} finally {
super.finalize();
}
}
};
}
