/*
* (non-Javadoc)
*
* @see
* com.metricstream.walkmod.plugin.visitors.EqualsAndNotEqualsHandler#applyChanges(org.walkmod.javalang.ast.expr.
* BinaryExpr)
*/
@Override
protected Expression applyChanges(BinaryExpr e) {
Expression l = e.getLeft();
Expression r = e.getRight();
Operator op = e.getOperator();
Expression expression = null;
if (isIntegerLiteralExpr(r)) {
expression = applyEquals(l, op, getValue((IntegerLiteralExpr) r));
} else if (isIntegerLiteralExpr(l)) {
expression = applyEquals(r, op, getValue((IntegerLiteralExpr) l));
}
return expression;
}
/*
* (non-Javadoc)
*
* @see
* com.metricstream.walkmod.plugin.visitors.EqualsAndNotEqualsHandler#isValidOperator(org.walkmod.javalang.ast.expr.
* BinaryExpr)
*/
@Override
protected boolean isValidOperator(BinaryExpr e) {
Operator op = e.getOperator();
return op == BINARY_EQUALS_OPERATOR
|| op == BINARY_LESS_OPERATOR
|| op == BINARY_NOT_EQUALS_OPERATOR
|| op == BINARY_GREATER_OPERATOR;
}
/*
* (non-Javadoc)
*
* @see org.walkmod.javalang.visitors.VoidVisitorAdapter#visit(org.walkmod.javalang.ast.expr.BinaryExpr,
* java.lang.Object)
*/
@Override
public void visit(BinaryExpr n, VisitorContext arg) {
Expression e = n.getLeft();
if (e instanceof BinaryExpr) {
Expression expression = getMethodCallExpr((BinaryExpr) e);
if (expression != null) {
n.setLeft(expression);
}
}
e = n.getRight();
if (e instanceof BinaryExpr) {
Expression expression = getMethodCallExpr((BinaryExpr) e);
if (expression != null) {
n.setRight(expression);
}
}
super.visit(n, arg);
}
@Override
public void visit(MethodDeclaration md, T ctx) {
BlockStmt block = md.getBody();
if (block != null) {
List<Statement> stmts = block.getStmts();
if (stmts != null) {
if (stmts.size() == 2) {
Statement firstStmt = stmts.get(0);
if (firstStmt instanceof IfStmt) {
Statement lastStmt = stmts.get(1);
if (lastStmt instanceof ReturnStmt) {
IfStmt ifStmt = (IfStmt) firstStmt;
Expression condition = ifStmt.getCondition();
if (condition instanceof BinaryExpr) {
BinaryExpr be = (BinaryExpr) condition;
if (be.getOperator().equals(BinaryExpr.Operator.equals)) {
if (be.getRight() instanceof NullLiteralExpr) {
Expression leftExpr = be.getLeft();
ReturnStmt returnStmt = (ReturnStmt) lastStmt;
Expression returnedExpr = returnStmt.getExpr();
CheckSameObjectField<T> visitor1 = new CheckSameObjectField<T>();
leftExpr.accept(visitor1, ctx);
String variableNameOfCheckingNull = visitor1.getName();
visitor1 = new CheckSameObjectField<T>();
returnedExpr.accept(visitor1, ctx);
String variableNameOfReturnExpression = visitor1.getName();
if (variableNameOfCheckingNull != null
&& variableNameOfReturnExpression != null
&& variableNameOfCheckingNull.equals(variableNameOfReturnExpression)) {
Statement thenStmt = ifStmt.getThenStmt();
if (thenStmt instanceof BlockStmt) {
BlockStmt thenBlock = (BlockStmt) thenStmt;
List<Statement> blockStmts = thenBlock.getStmts();
if (blockStmts != null && blockStmts.size() == 1) {
SynchronizedStmt synchStmt = new SynchronizedStmt();
BlockStmt innerBlock = new BlockStmt();
List<Statement> innerStmts = new LinkedList<Statement>();
BlockStmt newBlock = new BlockStmt();
List<Statement> newStmts = new LinkedList<Statement>();
newStmts.add(blockStmts.get(0));
newBlock.setStmts(newStmts);
IfStmt newIf =
new IfStmt(
new BinaryExpr(
new NameExpr(variableNameOfReturnExpression),
new NullLiteralExpr(),
BinaryExpr.Operator.equals),
newBlock,
null);
innerStmts.add(newIf);
innerBlock.setStmts(innerStmts);
synchStmt.setBlock(innerBlock);
synchStmt.setExpr(new ThisExpr());
blockStmts.clear();
blockStmts.add(synchStmt);
}
} else {
BlockStmt blockStmt = new BlockStmt();
List<Statement> stmtList = new LinkedList<Statement>();
SynchronizedStmt synchStmt = new SynchronizedStmt();
BlockStmt innerBlock = new BlockStmt();
List<Statement> innerStmts = new LinkedList<Statement>();
IfStmt newIf =
new IfStmt(
new BinaryExpr(
new NameExpr(variableNameOfReturnExpression),
new NullLiteralExpr(),
BinaryExpr.Operator.equals),
thenStmt,
null);
innerStmts.add(newIf);
innerBlock.setStmts(innerStmts);
synchStmt.setBlock(innerBlock);
synchStmt.setExpr(new ThisExpr());
stmtList.add(synchStmt);
blockStmt.setStmts(stmtList);
ifStmt.setThenStmt(blockStmt);
}
}
}
}
}
}
}
}
}
}
}