/**
* Inserts the provided {@code statement} after the the node this inserter was created for. Tries
* to put the {@code statement} as close to the {@code marker} as possible.
*
* @param statement The statement to insert after the insertion node.
*/
void insertAfter(final Statement statement) {
Validate.notNull(statement);
Validate.validState(
this.insertionList != null,
"Insertion is only possible after the inserter has been set up.");
Validate.validState(
this.insertionList.isPresent(),
"Insertion is only possible if setting up the inserter succeeded.");
if (this.differentAfterList) {
this.afterList.add(0, statement);
} else if (this.breakDetector.containsControlFlowBreakingStatement(this.markedStatement)) {
// we are trying to insert after a control flow breaking statement. That’s
// dangerous, better surround with try…finally
final AST factory = this.markedStatement.getAST();
final TryStatement tryStatement = factory.newTryStatement();
tryStatement.setFinally(factory.newBlock());
@SuppressWarnings("unchecked")
final List<Statement> tryBodyStatements = tryStatement.getBody().statements();
@SuppressWarnings("unchecked")
final List<Statement> finallyStatements = tryStatement.getFinally().statements();
final Statement copy = (Statement) ASTNode.copySubtree(factory, this.markedStatement);
tryBodyStatements.add(copy);
finallyStatements.add(statement);
this.insertionList.get().set(this.markerIndex, tryStatement);
this.markedStatement = tryStatement;
this.differentAfterList = true;
this.afterList = finallyStatements;
} else {
this.insertionList.get().add(this.markerIndex, statement);
}
}
@SuppressWarnings("unchecked")
public TryStatement newTryCatch(Block tryBlock, CatchClause... clauses) {
TryStatement tryStmt = ast.newTryStatement();
tryStmt.setBody(tryBlock);
tryStmt.catchClauses().addAll(Arrays.asList(clauses));
return tryStmt;
}
@Override
public boolean visit(TryStatement node) {
final List<Statement> tryStmts = asList(node.getBody());
if (tryStmts.isEmpty()) {
final List<Statement> finallyStmts = asList(node.getFinally());
if (!finallyStmts.isEmpty()) {
final ASTBuilder b = this.ctx.getASTBuilder();
this.ctx.getRefactorings().replace(node, b.copy(node.getFinally()));
return DO_NOT_VISIT_SUBTREE;
} else if (node.resources().isEmpty()) {
this.ctx.getRefactorings().remove(node);
return DO_NOT_VISIT_SUBTREE;
}
}
// }else {
// for (CatchClause catchClause : (List<CatchClause>) node.catchClauses()) {
// final List<Statement> finallyStmts = asList(catchClause.getBody());
// if (finallyStmts.isEmpty()) {
// // TODO cannot remove without checking what subsequent catch clauses are
// catching
// this.ctx.getRefactorings().remove(catchClause);
// }
// }
//
// final List<Statement> finallyStmts = asList(node.getFinally());
// if (finallyStmts.isEmpty()) {
// this.ctx.getRefactorings().remove(node.getFinally());
// }
// // TODO If all finally and catch clauses have been removed,
// // then we can remove the whole try statement and replace it with a simple block
// return DO_NOT_VISIT_SUBTREE; // TODO JNR is this correct?
// }
return VISIT_SUBTREE;
}
/*
* @see ASTVisitor#visit(TryStatement)
*/
public boolean visit(TryStatement node) {
this.fBuffer.append("try "); // $NON-NLS-1$
node.getBody().accept(this);
this.fBuffer.append(" "); // $NON-NLS-1$
for (Iterator it = node.catchClauses().iterator(); it.hasNext(); ) {
CatchClause cc = (CatchClause) it.next();
cc.accept(this);
}
if (node.getFinally() != null) {
this.fBuffer.append("finally "); // $NON-NLS-1$
node.getFinally().accept(this);
}
return false;
}
/*
* @see ASTVisitor#visit(TryStatement)
*/
@Override
public boolean visit(TryStatement node) {
this.fBuffer.append("try "); // $NON-NLS-1$
if (node.getAST().apiLevel() >= JLS4) {
if (!node.resources().isEmpty()) {
this.fBuffer.append("("); // $NON-NLS-1$
for (Iterator<VariableDeclarationExpression> it = node.resources().iterator();
it.hasNext(); ) {
VariableDeclarationExpression var = it.next();
var.accept(this);
if (it.hasNext()) {
this.fBuffer.append(","); // $NON-NLS-1$
}
}
this.fBuffer.append(") "); // $NON-NLS-1$
}
}
node.getBody().accept(this);
this.fBuffer.append(" "); // $NON-NLS-1$
for (Iterator<CatchClause> it = node.catchClauses().iterator(); it.hasNext(); ) {
CatchClause cc = it.next();
cc.accept(this);
}
if (node.getFinally() != null) {
this.fBuffer.append("finally "); // $NON-NLS-1$
node.getFinally().accept(this);
}
return false;
}
@Override
public void indexTryCatchBlock(
final Document document, final TryStatement tryStatement, final CatchClause catchClause) {
final ASTVisitor visitor =
new MethodCallVisitor() {
@Override
protected void handleMethodCall(final IMethodBinding methodBinding) {
final Optional<String> opt = BindingHelper.getIdentifier(methodBinding);
if (opt.isPresent()) {
CodeIndexer.addFieldToDocument(document, Fields.USED_METHODS_IN_FINALLY, opt.get());
}
};
};
if (tryStatement.getFinally() != null) {
tryStatement.getFinally().accept(visitor);
}
}
@Test
public void testIsThrowStatementInCatchClause() {
TryStatement tryStatement;
CatchClause catchStatement;
// 測試 符合的例子 是否會抓出
MethodDeclaration md = null;
md = ASTNodeFinder.getMethodDeclarationNodeByName(compilationUnit, "false_throwAndPrint");
tryStatement = (TryStatement) md.getBody().statements().get(0);
catchStatement = (CatchClause) tryStatement.catchClauses().get(0);
assertTrue(dummyHandlerVisitor.isThrowStatementInCatchClause(catchStatement));
// 測試 不符合例子 是否會抓出
md =
ASTNodeFinder.getMethodDeclarationNodeByName(
compilationUnit, "true_DummyHandlerTryNestedTry");
tryStatement = (TryStatement) md.getBody().statements().get(1);
catchStatement = (CatchClause) tryStatement.catchClauses().get(0);
assertFalse(dummyHandlerVisitor.isThrowStatementInCatchClause(catchStatement));
}
@Override
public boolean visit(EmptyStatement node) {
ASTNode parent = node.getParent();
if (parent instanceof Block) {
this.ctx.getRefactorings().remove(node);
return DO_NOT_VISIT_SUBTREE;
}
parent = getParentIgnoring(node, Block.class);
if (parent instanceof IfStatement) {
IfStatement is = (IfStatement) parent;
List<Statement> thenStmts = asList(is.getThenStatement());
List<Statement> elseStmts = asList(is.getElseStatement());
boolean thenIsEmptyStmt = thenStmts.size() == 1 && is(thenStmts.get(0), EmptyStatement.class);
boolean elseIsEmptyStmt = elseStmts.size() == 1 && is(elseStmts.get(0), EmptyStatement.class);
if (thenIsEmptyStmt && elseIsEmptyStmt) {
this.ctx.getRefactorings().remove(parent);
return DO_NOT_VISIT_SUBTREE;
} else if (thenIsEmptyStmt && is.getElseStatement() == null) {
this.ctx.getRefactorings().remove(is);
return DO_NOT_VISIT_SUBTREE;
} else if (elseIsEmptyStmt) {
this.ctx.getRefactorings().remove(is.getElseStatement());
return DO_NOT_VISIT_SUBTREE;
}
} else if (parent instanceof TryStatement) {
TryStatement ts = (TryStatement) parent;
return removeEmptyStmtBody(node, ts, ts.getBody());
} else if (parent instanceof EnhancedForStatement) {
EnhancedForStatement efs = (EnhancedForStatement) parent;
return removeEmptyStmtBody(node, efs, efs.getBody());
} else if (parent instanceof ForStatement) {
ForStatement fs = (ForStatement) parent;
return removeEmptyStmtBody(node, fs, fs.getBody());
} else if (parent instanceof WhileStatement) {
WhileStatement ws = (WhileStatement) parent;
return removeEmptyStmtBody(node, ws, ws.getBody());
}
return VISIT_SUBTREE;
}
/* (omit javadoc for this method)
* Method declared on ASTNode.
*/
ASTNode clone0(AST target) {
TryStatement result = new TryStatement(target);
result.setSourceRange(this.getStartPosition(), this.getLength());
result.copyLeadingComment(this);
result.setBody((Block) getBody().clone(target));
result.catchClauses().addAll(ASTNode.copySubtrees(target, catchClauses()));
result.setFinally((Block) ASTNode.copySubtree(target, getFinally()));
return result;
}
/**
* Builds a new {@link TryStatement} instance.
*
* @param body the try body
* @param catchClauses the catch clauses for the try
* @return a new try statement
*/
public TryStatement try0(final Block body, CatchClause... catchClauses) {
final TryStatement tryS = ast.newTryStatement();
tryS.setBody(body);
addAll(catchClauses(tryS), catchClauses);
return tryS;
}
private void createTryCatchStatement(org.eclipse.jdt.core.IBuffer buffer, String lineDelimiter)
throws CoreException {
List<Statement> result = new ArrayList<>(1);
TryStatement tryStatement = getAST().newTryStatement();
ITypeBinding[] exceptions = fAnalyzer.getExceptions();
ImportRewriteContext context =
new ContextSensitiveImportRewriteContext(
fAnalyzer.getEnclosingBodyDeclaration(), fImportRewrite);
if (!fIsMultiCatch) {
for (int i = 0; i < exceptions.length; i++) {
ITypeBinding exception = exceptions[i];
CatchClause catchClause = getAST().newCatchClause();
tryStatement.catchClauses().add(catchClause);
SingleVariableDeclaration decl = getAST().newSingleVariableDeclaration();
String varName = StubUtility.getExceptionVariableName(fCUnit.getJavaProject());
String name = fScope.createName(varName, false);
decl.setName(getAST().newSimpleName(name));
Type type = fImportRewrite.addImport(exception, getAST(), context);
decl.setType(type);
catchClause.setException(decl);
Statement st = getCatchBody(ASTNodes.getQualifiedTypeName(type), name, lineDelimiter);
if (st != null) {
catchClause.getBody().statements().add(st);
}
fLinkedProposalModel
.getPositionGroup(GROUP_EXC_TYPE + i, true)
.addPosition(fRewriter.track(decl.getType()), i == 0);
fLinkedProposalModel
.getPositionGroup(GROUP_EXC_NAME + i, true)
.addPosition(fRewriter.track(decl.getName()), false);
}
} else {
List<ITypeBinding> filteredExceptions = filterSubtypeExceptions(exceptions);
CatchClause catchClause = getAST().newCatchClause();
SingleVariableDeclaration decl = getAST().newSingleVariableDeclaration();
String varName = StubUtility.getExceptionVariableName(fCUnit.getJavaProject());
String name = fScope.createName(varName, false);
decl.setName(getAST().newSimpleName(name));
UnionType unionType = getAST().newUnionType();
List<Type> types = unionType.types();
int i = 0;
for (ITypeBinding exception : filteredExceptions) {
Type type = fImportRewrite.addImport(exception, getAST(), context);
types.add(type);
fLinkedProposalModel
.getPositionGroup(GROUP_EXC_TYPE + i, true)
.addPosition(fRewriter.track(type), i == 0);
i++;
}
decl.setType(unionType);
catchClause.setException(decl);
fLinkedProposalModel
.getPositionGroup(GROUP_EXC_NAME + 0, true)
.addPosition(fRewriter.track(decl.getName()), false);
Statement st = getCatchBody("Exception", name, lineDelimiter); // $NON-NLS-1$
if (st != null) {
catchClause.getBody().statements().add(st);
}
tryStatement.catchClauses().add(catchClause);
}
List<ASTNode> variableDeclarations = getSpecialVariableDeclarationStatements();
ListRewrite statements =
fRewriter.getListRewrite(tryStatement.getBody(), Block.STATEMENTS_PROPERTY);
boolean selectedNodeRemoved = false;
ASTNode expressionStatement = null;
for (int i = 0; i < fSelectedNodes.length; i++) {
ASTNode node = fSelectedNodes[i];
if (node instanceof VariableDeclarationStatement && variableDeclarations.contains(node)) {
AST ast = getAST();
VariableDeclarationStatement statement = (VariableDeclarationStatement) node;
// Create a copy and remove the initializer
VariableDeclarationStatement copy =
(VariableDeclarationStatement) ASTNode.copySubtree(ast, statement);
List<IExtendedModifier> modifiers = copy.modifiers();
for (Iterator<IExtendedModifier> iter = modifiers.iterator(); iter.hasNext(); ) {
IExtendedModifier modifier = iter.next();
if (modifier.isModifier()
&& Modifier.isFinal(((Modifier) modifier).getKeyword().toFlagValue())) {
iter.remove();
}
}
List<VariableDeclarationFragment> fragments = copy.fragments();
for (Iterator<VariableDeclarationFragment> iter = fragments.iterator(); iter.hasNext(); ) {
VariableDeclarationFragment fragment = iter.next();
fragment.setInitializer(null);
}
CompilationUnit root = (CompilationUnit) statement.getRoot();
int extendedStart = root.getExtendedStartPosition(statement);
// we have a leading comment and the comment is covered by the selection
if (extendedStart != statement.getStartPosition()
&& extendedStart >= fSelection.getOffset()) {
String commentToken =
buffer.getText(extendedStart, statement.getStartPosition() - extendedStart);
commentToken = Strings.trimTrailingTabsAndSpaces(commentToken);
Type type = statement.getType();
String typeName = buffer.getText(type.getStartPosition(), type.getLength());
copy.setType(
(Type)
fRewriter.createStringPlaceholder(commentToken + typeName, type.getNodeType()));
}
result.add(copy);
// convert the fragments into expression statements
fragments = statement.fragments();
if (!fragments.isEmpty()) {
List<ExpressionStatement> newExpressionStatements = new ArrayList<>();
for (Iterator<VariableDeclarationFragment> iter = fragments.iterator();
iter.hasNext(); ) {
VariableDeclarationFragment fragment = iter.next();
Expression initializer = fragment.getInitializer();
if (initializer != null) {
Assignment assignment = ast.newAssignment();
assignment.setLeftHandSide(
(Expression) fRewriter.createCopyTarget(fragment.getName()));
assignment.setRightHandSide((Expression) fRewriter.createCopyTarget(initializer));
newExpressionStatements.add(ast.newExpressionStatement(assignment));
}
}
if (!newExpressionStatements.isEmpty()) {
if (fSelectedNodes.length == 1) {
expressionStatement =
fRewriter.createGroupNode(
newExpressionStatements.toArray(new ASTNode[newExpressionStatements.size()]));
} else {
fRewriter.replace(
statement,
fRewriter.createGroupNode(
newExpressionStatements.toArray(new ASTNode[newExpressionStatements.size()])),
null);
}
} else {
fRewriter.remove(statement, null);
selectedNodeRemoved = true;
}
} else {
fRewriter.remove(statement, null);
selectedNodeRemoved = true;
}
}
}
result.add(tryStatement);
ASTNode replacementNode;
if (result.size() == 1) {
replacementNode = result.get(0);
} else {
replacementNode = fRewriter.createGroupNode(result.toArray(new ASTNode[result.size()]));
}
if (fSelectedNodes.length == 1) {
ASTNode selectedNode = fSelectedNodes[0];
if (selectedNode instanceof MethodReference) {
MethodReference methodReference = (MethodReference) selectedNode;
IMethodBinding functionalMethod =
QuickAssistProcessor.getFunctionalMethodForMethodReference(methodReference);
// functionalMethod is non-null and non-generic. See
// ExceptionAnalyzer.handleMethodReference(MethodReference node).
Assert.isTrue(functionalMethod != null && !functionalMethod.isGenericMethod());
LambdaExpression lambda =
QuickAssistProcessor.convertMethodRefernceToLambda(
methodReference, functionalMethod, fRootNode, fRewriter, null, true);
ASTNode statementInBlock = (ASTNode) ((Block) lambda.getBody()).statements().get(0);
fRewriter.replace(statementInBlock, replacementNode, null);
statements.insertLast(statementInBlock, null);
return;
}
LambdaExpression enclosingLambda = ASTResolving.findEnclosingLambdaExpression(selectedNode);
if (enclosingLambda != null
&& selectedNode.getLocationInParent() == LambdaExpression.BODY_PROPERTY
&& enclosingLambda.resolveMethodBinding() != null) {
QuickAssistProcessor.changeLambdaBodyToBlock(enclosingLambda, getAST(), fRewriter);
Block blockBody = (Block) fRewriter.get(enclosingLambda, LambdaExpression.BODY_PROPERTY);
ASTNode statementInBlock = (ASTNode) blockBody.statements().get(0);
fRewriter.replace(statementInBlock, replacementNode, null);
statements.insertLast(statementInBlock, null);
return;
}
if (expressionStatement != null) {
statements.insertLast(expressionStatement, null);
} else {
if (!selectedNodeRemoved)
statements.insertLast(fRewriter.createMoveTarget(selectedNode), null);
}
fRewriter.replace(selectedNode, replacementNode, null);
} else {
ListRewrite source =
fRewriter.getListRewrite(
fSelectedNodes[0].getParent(),
(ChildListPropertyDescriptor) fSelectedNodes[0].getLocationInParent());
ASTNode toMove =
source.createMoveTarget(
fSelectedNodes[0], fSelectedNodes[fSelectedNodes.length - 1], replacementNode, null);
statements.insertLast(toMove, null);
}
}
