/**
* Insert the specified file groups into a newly created merge file group.
*
* @param subFileGroups The sub file groups to be added.
* @param filesNeeded An array of files that are actually needed by the action that uses them.
* @return The ID of the newly-created merge file group.
*/
private int createMergeFileGroup(List<Integer> subFileGroups, Integer[] filesNeeded) {
/*
* Create the new fileGroup. Even though we won't populate it until the multiOp
* is executed, we must still allocate a new fileGroup ID number.
*/
int fileGroupId = fileGroupMgr.newMergeGroup(destPkgId);
if (fileGroupId < 0) {
throw new FatalError("Unable to create new merge file group");
}
/*
* Determine whether any filters are required (since we don't necessarily need all
* the files that appear in the subFileGroups.
*/
List<Integer> filteredSubFileGroups = new ArrayList<Integer>();
for (int subFileGroup : subFileGroups) {
filteredSubFileGroups.add(createFilterIfNeeded(subFileGroup, filesNeeded));
}
FileGroupUndoOp op = new FileGroupUndoOp(buildStore, fileGroupId);
op.recordMembershipChange(new ArrayList<Integer>(), filteredSubFileGroups);
multiOp.add(op);
return fileGroupId;
}
/**
* @param inputFileGroupId The group ID we're planning to attach to an action's input.
* @param filesNeeded The files that are actually required by the action.
* @return If all files in the fileGroup are required, return inputFileGroupId, else return a
* filterID (which depends on inputFileGroupId) that restricts the input to only those files
* that are required.
*/
private int createFilterIfNeeded(int inputFileGroupId, Integer[] filesNeeded) {
/*
* Look through all of the files in the file group, and learn which of them are needed.
* This is an O(n*n), but for relatively small file groups (not 1000s of items), this is OK.
*/
List<Integer> fileGroupMembers = fileGroupCache.get(inputFileGroupId);
if (fileGroupMembers == null) {
throw new FatalError("Can't find members for fileGroup with ID: " + inputFileGroupId);
}
List<Integer> neededFileGroupMembers = new ArrayList<Integer>();
for (int pathId : fileGroupMembers) {
for (int i = 0; i < filesNeeded.length; i++) {
if (pathId == filesNeeded[i]) {
neededFileGroupMembers.add(pathId);
break;
}
}
}
/*
* If the set of needed members is smaller than the set of total members, we must add
* a filter so that only the required files are kept.
*/
if (neededFileGroupMembers.size() < fileGroupMembers.size()) {
int filterGroupId = fileGroupMgr.newFilterGroup(destPkgId, inputFileGroupId);
if (filterGroupId < 0) {
throw new FatalError("Unable to create new filter file group");
}
/*
* Populate the filter with patterns that match the needed paths. Note that
* the file is not (yet) in the destination package, so we just pretend its
* there.
*/
List<String> neededPatterns = new ArrayList<String>();
for (int pathId : neededFileGroupMembers) {
String pathString = fileMgr.getPathName(pathId, destPkgId);
if (pathString == null) {
throw new FatalError("Invalid pathId in file group");
}
neededPatterns.add("ia:" + pathString);
}
/* schedule the population of the filter group with patterns */
FileGroupUndoOp op = new FileGroupUndoOp(buildStore, filterGroupId);
op.recordMembershipChange(new ArrayList<String>(), neededPatterns);
multiOp.add(op);
return filterGroupId;
}
/* else, no filter required - return the original file group */
else {
return inputFileGroupId;
}
}
/**
* Given a list of file IDs, create a new source file group and schedule the members to be added
* to it (by appending to the multiOp). In addition to moving the file group into the destination
* package, all the individual files are also moved. If any files are not within the source root,
* throw a {@link CanNotRefactorException} with cause code of PATH_OUT_OF_RANGE.
*
* @param members A list of file IDs to be added to the file group.
* @return The ID of the newly-created file group.
* @throws CanNotRefactorException Something went wrong during the refactoring.
*/
private int createSourceFileGroup(List<Integer> members) throws CanNotRefactorException {
/*
* Create the new fileGroup. Even though we won't populate it until the multiOp
* is executed, we must still allocate a new fileGroup ID number.
*/
int fileGroupId = fileGroupMgr.newSourceGroup(destPkgId);
if (fileGroupId < 0) {
throw new FatalError("Unable to create new file group");
}
FileGroupUndoOp op = new FileGroupUndoOp(buildStore, fileGroupId);
op.recordMembershipChange(new ArrayList<Integer>(), members);
multiOp.add(op);
/*
* Move all the files into the destination package, using FileUndoOps. Before
* a file can be moved, we must ensure that it's within the source root of the package.
*/
List<Integer> filesOutOfRange = new ArrayList<Integer>();
/*
* For each loose file, validate if it's within the package roots, and if so,
* schedule an UndoOp to make the necessary change. If not, throw an exception.
*/
for (int pathId : members) {
PackageDesc oldDesc = pkgMemberMgr.getPackageOfMember(IPackageMemberMgr.TYPE_FILE, pathId);
if (oldDesc == null) {
throw new FatalError("Can't find pathId");
}
/*
* Check that this path is within the source root. If so, schedule it to be move to
* the destination package.
*/
if (fileMgr.isAncestorOf(pkgRootId, pathId)) {
FileUndoOp pkgChangeOp = new FileUndoOp(buildStore, pathId);
pkgChangeOp.recordChangePackage(
oldDesc.pkgId, oldDesc.pkgScopeId, destPkgId, IPackageMemberMgr.SCOPE_PRIVATE);
multiOp.add(pkgChangeOp);
}
/*
* Else, record this pathID as being out of range. We'll report an exception
* once we've collected the complete list of invalid paths.
*/
else {
filesOutOfRange.add(pathId);
}
}
/*
* If any files were out of range, throw an exception.
*/
if (filesOutOfRange.size() > 0) {
throw new CanNotRefactorException(
Cause.PATH_OUT_OF_RANGE, filesOutOfRange.toArray(new Integer[0]));
}
/* update the cache, with the members that the file group will contain (once the multiOp is executed) */
fileGroupCache.put(fileGroupId, members);
return fileGroupId;
}