/**
* Reads one statement from the parser, executes it, and prints the result. Returns false if there
* was nothing else to run.
*/
public boolean runOne(Parser parser, Handler handler) {
handler.beforeParse();
OJStatement.Argument[] arguments =
(OJStatement.Argument[]) argumentList.toArray(new OJStatement.Argument[0]);
OJStatement statement = new OJStatement(connection);
ClassDeclaration classDecl = statement.init(arguments);
Environment env = statement.getEnvironment();
ParseTree parseTree = null;
try {
parseTree = parser.InteractiveStatement(env);
if (parseTree == null) {
return false;
}
} catch (ParseException e) {
handler.onParseException(e);
return parser.getNextToken().kind != Parser.EOF;
}
handler.beforeExecute(parseTree);
OJQueryExpander queryExpander = new OJQueryExpander(env, connection);
parseTree = statement.validate(parseTree, queryExpander);
OJClass clazz = null;
if (parseTree instanceof Expression) {
Expression expression = (Expression) parseTree;
clazz = Util.getType(env, expression);
}
Object o = statement.evaluate(classDecl, parseTree, arguments);
handler.afterExecute(clazz, o);
if (o instanceof VarDecl[]) {
VarDecl[] decls = (VarDecl[]) o;
for (int i = 0; i < decls.length; i++) {
VarDecl decl = decls[i];
argumentList.add(new OJStatement.Argument(decl.name, decl.clazz, decl.value));
}
}
return true;
}
