@Override
public Statement toJavaStatement(Matcher m) {
ErrorManager.error(
"AssignStmtPattern@118",
"The method should only be call on Full-series classes, this one is only for src pattern.");
return null;
}
@Override
public Pair<List<Pair<String, Name>>, Boolean> tryMatch(
Statement s, Map<String, String> var2type, VariableContext context) {
List<Pair<String, Name>> matchedVarList = new ArrayList<Pair<String, Name>>();
Boolean matchedSuccessful = false;
// An assignment statement pattern should match both
// assignment statements
// as well as variabledelcaration statements
if (s instanceof ExpressionStatement) {
Expression exp = ((ExpressionStatement) s).getExpression();
if (exp instanceof Assignment) {
Assignment assignment = (Assignment) exp;
// Note that the left hand side expression of an assignment expression is always a *name*
Name lhsExp = null;
;
try {
lhsExp = (Name) assignment.getLeftHandSide();
} catch (Exception e) {
ErrorManager.error(
"AssignStmtPattrn@58",
"The left hand side pattern is not a name, instead: " + assignment);
return new Pair<List<Pair<String, Name>>, Boolean>(matchedVarList, matchedSuccessful);
}
// Debugging types
TypeHandler.printTypeMatchInfo(lhsExp, var2type.get(this.variable), "AssignStmtPattern@57");
// Check the type between the lhs metavariable and the name
// TypeHandler.typeMatchCheck(lhsExp, var2type.get(this.variable))
if (context.variableMatchCheck(lhsExp, this.variable)) {
matchedVarList.add(new Pair<String, Name>(this.variable.getName(), lhsExp));
} else {
// Type of the lhs expression does not match
matchedSuccessful = false;
}
// Try to match the expression pattern
Expression rhsExp = assignment.getRightHandSide();
Pair<List<Pair<String, Name>>, Boolean> expMatch =
this.expression.tryMatch(rhsExp, var2type, context);
if (expMatch.getSecond()) {
for (Pair<String, Name> p : expMatch.getFirst()) {
matchedVarList.add(p);
}
matchedSuccessful = true;
}
}
} else if (s instanceof VariableDeclarationStatement) {
VariableDeclarationStatement vds = (VariableDeclarationStatement) s;
if (vds.fragments().size() != 1) {
// If the error occurs, go and fix the bug in
ErrorManager.error(
"AssignStmtPattern@lien81", "The size of variable declaration fragments is not 1");
}
VariableDeclarationFragment vdf = (VariableDeclarationFragment) vds.fragments().get(0);
// Print debugging info for the lhs expression and its corresponding type pattern name
TypeHandler.printTypeMatchInfo(
vdf.getName(), var2type.get(this.variable), "AssignStmtPattern@line83");
// Type check on the lhs variable
// if (TypeHandler.typeMatchCheck(vdf.getName(), var2type.get(this.variable)))
if (context.variableMatchCheck(vdf.getName(), this.variable))
matchedVarList.add(new Pair<String, Name>(this.variable.getName(), vdf.getName()));
Pair<List<Pair<String, Name>>, Boolean> expMatch =
this.expression.tryMatch(vdf.getInitializer(), var2type, context);
if (expMatch.getSecond()) {
for (Pair<String, Name> p : expMatch.getFirst()) {
matchedVarList.add(p);
}
matchedSuccessful = true;
}
}
return new Pair<List<Pair<String, Name>>, Boolean>(matchedVarList, matchedSuccessful);
}