/**
* Looks for the given type in the list of outputs and recurring all the children as well. Will
* stop at first found and return it.
*
* @param outputs list of outputs, can be null or empty.
* @param type the type to look for
* @return the first found type, or <tt>null</tt> if not found
*/
public static <T> T findFirstTypeInOutputs(List<ProcessorDefinition> outputs, Class<T> type) {
List<T> found = new ArrayList<T>();
doFindType(outputs, type, found);
if (found.isEmpty()) {
return null;
}
return found.iterator().next();
}
@SuppressWarnings({"unchecked", "rawtypes"})
private static <T> void doFindType(
List<ProcessorDefinition<?>> outputs, Class<T> type, List<T> found) {
if (outputs == null || outputs.isEmpty()) {
return;
}
for (ProcessorDefinition out : outputs) {
if (type.isInstance(out)) {
found.add((T) out);
}
// send is much common
if (out instanceof SendDefinition) {
SendDefinition send = (SendDefinition) out;
List<ProcessorDefinition<?>> children = send.getOutputs();
doFindType(children, type, found);
}
// special for choice
if (out instanceof ChoiceDefinition) {
ChoiceDefinition choice = (ChoiceDefinition) out;
for (WhenDefinition when : choice.getWhenClauses()) {
List<ProcessorDefinition<?>> children = when.getOutputs();
doFindType(children, type, found);
}
// otherwise is optional
if (choice.getOtherwise() != null) {
List<ProcessorDefinition<?>> children = choice.getOtherwise().getOutputs();
doFindType(children, type, found);
}
}
// special for try ... catch ... finally
if (out instanceof TryDefinition) {
TryDefinition doTry = (TryDefinition) out;
List<ProcessorDefinition<?>> doTryOut = doTry.getOutputsWithoutCatches();
doFindType(doTryOut, type, found);
List<CatchDefinition> doTryCatch = doTry.getCatchClauses();
for (CatchDefinition doCatch : doTryCatch) {
doFindType(doCatch.getOutputs(), type, found);
}
if (doTry.getFinallyClause() != null) {
doFindType(doTry.getFinallyClause().getOutputs(), type, found);
}
// do not check children as we already did that
continue;
}
// try children as well
List<ProcessorDefinition<?>> children = out.getOutputs();
doFindType(children, type, found);
}
}
@SuppressWarnings("unchecked")
private static <T> void doFindType(
List<ProcessorDefinition> outputs, Class<T> type, List<T> found) {
if (outputs == null || outputs.isEmpty()) {
return;
}
for (ProcessorDefinition out : outputs) {
if (type.isInstance(out)) {
found.add((T) out);
}
// send is much common
if (out instanceof SendDefinition) {
SendDefinition send = (SendDefinition) out;
List<ProcessorDefinition> children = send.getOutputs();
doFindType(children, type, found);
}
// special for choice
if (out instanceof ChoiceDefinition) {
ChoiceDefinition choice = (ChoiceDefinition) out;
for (WhenDefinition when : choice.getWhenClauses()) {
List<ProcessorDefinition> children = when.getOutputs();
doFindType(children, type, found);
}
// otherwise is optional
if (choice.getOtherwise() != null) {
List<ProcessorDefinition> children = choice.getOtherwise().getOutputs();
doFindType(children, type, found);
}
}
// try children as well
List<ProcessorDefinition> children = out.getOutputs();
doFindType(children, type, found);
}
}
/**
* Looks for the given type in the list of outputs and recurring all the children as well.
*
* @param outputs list of outputs, can be null or empty.
* @param type the type to look for
* @return the found definitions, or <tt>null</tt> if not found
*/
public static <T> Iterator<T> filterTypeInOutputs(
List<ProcessorDefinition> outputs, Class<T> type) {
List<T> found = new ArrayList<T>();
doFindType(outputs, type, found);
return found.iterator();
}
