/**
* Creates a compilation unit change based on the events recorded by this compilation unit
* rewrite.
*
* @param name the name of the change to create
* @param generateGroups <code>true</code> to generate text edit groups, <code>false</code>
* otherwise
* @param monitor the progress monitor or <code>null</code>
* @return a {@link CompilationUnitChange}, or <code>null</code> for an empty change
* @throws CoreException when text buffer acquisition or import rewrite text edit creation fails
* @throws IllegalArgumentException when the AST rewrite encounters problems
*/
public CompilationUnitChange createChange(String name, boolean generateGroups)
throws CoreException {
CompilationUnitChange cuChange = new CompilationUnitChange(name, document);
MultiTextEdit multiEdit = new MultiTextEdit();
cuChange.setEdit(multiEdit);
return attachChange(cuChange, generateGroups);
}
/**
* Attaches the changes of this compilation unit rewrite to the given CU Change. The given change
* <b>must</b> either have no root edit, or a MultiTextEdit as a root edit. The edits in the given
* change <b>must not</b> overlap with the changes of this compilation unit.
*
* @param cuChange existing CompilationUnitChange with a MultiTextEdit root or no root at all.
* @param generateGroups <code>true</code> to generate text edit groups, <code>false</code>
* otherwise
* @param monitor the progress monitor or <code>null</code>
* @return a change combining the changes of this rewrite and the given rewrite, or <code>null
* </code> for an empty change
* @throws CoreException when text buffer acquisition or import rewrite text edit creation fails
*/
public CompilationUnitChange attachChange(CompilationUnitChange cuChange, boolean generateGroups)
throws CoreException {
boolean needsAstRewrite =
fRewrite != null; // TODO: do we need something like ASTRewrite#hasChanges() here?
boolean needsImportRemoval = fImportRemover != null && fImportRemover.hasRemovedNodes();
boolean needsImportRewrite =
fImportRewrite != null && fImportRewrite.hasRecordedChanges() || needsImportRemoval;
if (!needsAstRewrite && !needsImportRemoval && !needsImportRewrite) return null;
MultiTextEdit multiEdit = (MultiTextEdit) cuChange.getEdit();
if (multiEdit == null) {
multiEdit = new MultiTextEdit();
cuChange.setEdit(multiEdit);
}
if (needsAstRewrite) {
TextEdit rewriteEdit;
if (fRememberContent != null) {
rewriteEdit =
fRewrite.rewriteAST(fRememberContent, WorkerMessageHandler.get().getOptions());
} else {
rewriteEdit = fRewrite.rewriteAST(document, WorkerMessageHandler.get().getOptions());
}
if (!isEmptyEdit(rewriteEdit)) {
multiEdit.addChild(rewriteEdit);
if (generateGroups) {
for (Iterator<TextEditGroup> iter = fTextEditGroups.iterator(); iter.hasNext(); ) {
TextEditGroup group = iter.next();
cuChange.addTextEditGroup(group);
}
}
}
}
if (needsImportRemoval) {
fImportRemover.applyRemoves(getImportRewrite());
}
if (needsImportRewrite) {
TextEdit importsEdit = fImportRewrite.rewriteImports();
if (!isEmptyEdit(importsEdit)) {
multiEdit.addChild(importsEdit);
String importUpdateName = RefactoringCoreMessages.INSTANCE.ASTData_update_imports();
cuChange.addTextEditGroup(new TextEditGroup(importUpdateName, importsEdit));
}
} else {
}
if (isEmptyEdit(multiEdit)) return null;
return cuChange;
}