@Override
public FSM parseToFSM() {
boolean first = true;
FSM tmp = null;
boolean isSimple = true;
for (Expression e : this.disj) {
if (first) {
tmp = e.parseToFSM();
first = false;
if (e.getType() != RegularExpressionParser.Literal) isSimple = false;
} else if (e.getType() == RegularExpressionParser.Literal && isSimple) {
IntDomain dom = tmp.initState.transitions.iterator().next().domain;
int val = Integer.parseInt(((Literal) e).lit);
tmp.initState.transitions.iterator().next().domain = dom.union(val);
} else {
tmp = tmp.union(e.parseToFSM());
isSimple = false;
}
}
return tmp;
}
private Rvalue compileImpl(IntermediateCompiler ic, Scope scope, CType leftType, CType rightType)
throws SyntaxException {
// Compile operands.
Rvalue rhs = right.compileWithConversion(ic, scope, rightType);
Lvalue lhs = left.compileAsLvalue(ic, scope, false);
// Load LHS to register.
Rvalue lhsVal = new Rvalue(new VirtualRegister());
ic.emit("load", lhsVal.getRegister(), "0", lhs.getRegister());
lhsVal = left.getType(scope).compileConversion(ic, scope, lhsVal, leftType);
// Compile the binary operator.
String binOp = operator.binaryOperator;
Rvalue retVal;
if (leftType.isPointer()) {
// Scale integer operand if necessary.
int leftIncrSize = left.getType(scope).decay().getIncrementSize();
if (leftIncrSize > 1) ic.emit("mul", rhs.getRegister(), "=" + leftIncrSize);
ic.emit(operator.mnemonic, lhsVal.getRegister(), rhs.getRegister());
retVal = lhsVal;
} else if (operator.type == BinaryExpression.Type.BITWISE)
retVal = leftType.compileBinaryBitwiseOperator(ic, scope, lhsVal, rhs, binOp);
else if (operator.type == BinaryExpression.Type.SHIFT)
retVal = leftType.compileBinaryShiftOperator(ic, scope, lhsVal, rhs, binOp);
else // if (operator.type == BinaryExpression.Type.ARITHMETIC)
retVal = leftType.compileBinaryArithmeticOperator(ic, scope, lhsVal, rhs, binOp);
// Convert to the original type of the left operand.
retVal = leftType.compileConversion(ic, scope, retVal, left.getType(scope));
// Assign result back to lvalue.
ic.emit("store", retVal.getRegister(), "0", lhs.getRegister());
return retVal;
}
/**
* Create an Evaluator for the given query sources and projection
*
* @param <T>
* @param metadata query metadata
* @param sources sources of the query
* @param projection projection of the query
* @return evaluator
*/
public <T> Evaluator<T> create(
QueryMetadata metadata, List<? extends Expression<?>> sources, Expression<T> projection) {
final CollQuerySerializer serializer = new CollQuerySerializer(templates);
serializer.append("return ");
if (projection instanceof FactoryExpression<?>) {
serializer.append("(");
serializer.append(ClassUtils.getName(projection.getType()));
serializer.append(")(");
serializer.handle(projection);
serializer.append(")");
} else {
serializer.handle(projection);
}
serializer.append(";");
Map<Object, String> constantToLabel = serializer.getConstantToLabel();
Map<String, Object> constants = getConstants(metadata, constantToLabel);
Class<?>[] types = new Class<?>[sources.size()];
String[] names = new String[sources.size()];
for (int i = 0; i < sources.size(); i++) {
types[i] = sources.get(i).getType();
names[i] = sources.get(i).toString();
}
// normalize types
for (int i = 0; i < types.length; i++) {
if (Primitives.isWrapperType(types[i])) {
types[i] = Primitives.unwrap(types[i]);
}
}
return factory.createEvaluator(
serializer.toString(), projection.getType(), names, types, constants);
}
/**
* Create an Evaluator for the given source and filter
*
* @param <T>
* @param source source of the query
* @param filter filter of the query
* @return evaluator
*/
@SuppressWarnings("unchecked")
public <T> Evaluator<List<T>> createEvaluator(
QueryMetadata metadata, Expression<? extends T> source, Predicate filter) {
String typeName = ClassUtils.getName(source.getType());
CollQuerySerializer ser = new CollQuerySerializer(templates);
ser.append(
"java.util.List<" + typeName + "> rv = new java.util.ArrayList<" + typeName + ">();\n");
ser.append("for (" + typeName + " " + source + " : " + source + "_) {\n");
ser.append(" try {\n");
ser.append(" if (").handle(filter).append(") {\n");
ser.append(" rv.add(" + source + ");\n");
ser.append(" }\n");
ser.append(" } catch (NullPointerException npe) { }\n");
ser.append("}\n");
ser.append("return rv;");
Map<Object, String> constantToLabel = ser.getConstantToLabel();
Map<String, Object> constants = getConstants(metadata, constantToLabel);
Type sourceType = new ClassType(TypeCategory.SIMPLE, source.getType());
ClassType sourceListType = new ClassType(TypeCategory.SIMPLE, Iterable.class, sourceType);
return factory.createEvaluator(
ser.toString(),
sourceListType,
new String[] {source + "_"},
new Type[] {sourceListType},
new Class[] {Iterable.class},
constants);
}
protected Query range(
Path<?> leftHandSide,
String field,
@Nullable Expression<?> min,
@Nullable Expression<?> max,
boolean minInc,
boolean maxInc,
QueryMetadata metadata) {
if (min != null && Number.class.isAssignableFrom(min.getType())
|| max != null && Number.class.isAssignableFrom(max.getType())) {
@SuppressWarnings("unchecked") // guarded by previous check
Constant<? extends Number> minConstant = (Constant<? extends Number>) min;
@SuppressWarnings("unchecked") // guarded by previous check
Constant<? extends Number> maxConstant = (Constant<? extends Number>) max;
Class<? extends Number> numType =
minConstant != null ? minConstant.getType() : maxConstant.getType();
// this is not necessarily safe, but compile time checking
// on the user side mandates these types to be interchangeable
@SuppressWarnings("unchecked")
Class<Number> unboundedNumType = (Class<Number>) numType;
return numericRange(
unboundedNumType,
field,
minConstant == null ? null : minConstant.getConstant(),
maxConstant == null ? null : maxConstant.getConstant(),
minInc,
maxInc);
}
return stringRange(leftHandSide, field, min, max, minInc, maxInc, metadata);
}
private void jitStringConcat(Expression left, Expression right) {
invokeConstructor(StringBuilder.class);
jitExpression(left, String.class);
invokeVirtual(StringBuilder.class, "append", StringBuilder.class, left.getType());
jitExpression(right, String.class);
invokeVirtual(StringBuilder.class, "append", StringBuilder.class, right.getType());
invokeVirtual(StringBuilder.class, "toString", String.class);
}
public BinaryRelationalExp(int o, Expression l, Expression r) throws TypeClashException {
operator = o;
left = l;
right = r;
type = parser.operators.check(this.operator, this.left.getType(), this.right.getType());
if ((l.getType().getType() instanceof IntType) && (r.getType().getType() instanceof FloatType))
left = new CastedExp(new FloatType(), l);
else if ((l.getType().getType() instanceof FloatType)
&& (r.getType().getType() instanceof IntType)) right = new CastedExp(new FloatType(), r);
}
private void jitInstanceof(SingleCondition singleCondition) {
Class<?> value = (Class<?>) ((FixedExpression) singleCondition.getRight()).getValue();
String internalClassName = internalName(value);
Expression left = singleCondition.getLeft();
Class<?> leftType =
isDeclarationExpression(left) ? convertFromPrimitiveType(left.getType()) : left.getType();
jitExpression(left, leftType);
mv.visitTypeInsn(INSTANCEOF, internalClassName);
}
private ConstantValue evaluateBinaryExpr(
Expression lhs, Expression rhs, Type resultType, ArithmeticBinaryOperation operation) {
// Evaluate subexpressions
ConstantValue valueLhs = lhs.accept(this, null);
ConstantValue valueRhs = rhs.accept(this, null);
// Convert to type implied by usual arithmetic conversions
final ArithmeticType commonType =
TypeUtils.doUsualArithmeticConversions(
(ArithmeticType) lhs.getType().get(), (ArithmeticType) rhs.getType().get());
final ConstantType commonConstantType = typeFactory.newConstantType(commonType);
final ConstantType resultConstantType = typeFactory.newConstantType(resultType);
valueLhs = valueLhs.castTo(commonConstantType);
valueRhs = valueRhs.castTo(commonConstantType);
// Perform the operation
switch (operation) {
case ADDITION:
return valueLhs.add(valueRhs);
case SUBTRACTION:
return valueLhs.subtract(valueRhs);
case MULTIPLICATION:
return valueLhs.multiply(valueRhs);
case DIVISION:
return valueLhs.divide(valueRhs);
case REMAINDER:
return valueLhs.remainder(valueRhs);
case BITWISE_AND:
return valueLhs.bitwiseAnd(valueRhs);
case BITWISE_OR:
return valueLhs.bitwiseOr(valueRhs);
case BITWISE_XOR:
return valueLhs.bitwiseXor(valueRhs);
case LESS:
return valueLhs.less(valueRhs).castTo(resultConstantType);
case LESS_OR_EQUAL:
return valueLhs.lessOrEqual(valueRhs).castTo(resultConstantType);
case GREATER:
return valueLhs.greater(valueRhs).castTo(resultConstantType);
case GREATER_OR_EQUAL:
return valueLhs.greaterOrEqual(valueRhs).castTo(resultConstantType);
case EQUAL:
return valueLhs.equalTo(valueRhs).castTo(resultConstantType);
case NOT_EQUAL:
return valueLhs.notEqualTo(valueRhs).castTo(resultConstantType);
default:
throw new RuntimeException("unexpected arithmetic binary operation '" + operation + "'");
}
}
/**
* @param e condition
* @param index Index object
* @param isJoin whether a join or not
*/
void addIndexCondition(Expression e, Index index, boolean isJoin) {
rangeIndex = index;
isJoinIndex = isJoin;
switch (e.getType()) {
case OpTypes.NOT:
indexCondition = e;
break;
case OpTypes.IS_NULL:
indexEndCondition = e;
break;
case OpTypes.EQUAL:
indexCondition = e;
indexEndCondition = indexCondition;
break;
case OpTypes.GREATER:
case OpTypes.GREATER_EQUAL:
indexCondition = e;
break;
case OpTypes.SMALLER:
case OpTypes.SMALLER_EQUAL:
indexEndCondition = e;
break;
default:
Error.runtimeError(ErrorCode.U_S0500, "Expression");
}
}
public void translateDesynthesized(ClassGenerator classGen, MethodGenerator methodGen) {
final Type tleft = _left.getType();
final InstructionList il = methodGen.getInstructionList();
if (tleft instanceof BooleanType) {
_left.translate(classGen, methodGen);
_right.translate(classGen, methodGen);
_falseList.add(
il.append(
_op == Operators.EQ
? (BranchInstruction) new IF_ICMPNE(null)
: (BranchInstruction) new IF_ICMPEQ(null)));
} else if (tleft instanceof NumberType) {
_left.translate(classGen, methodGen);
_right.translate(classGen, methodGen);
if (tleft instanceof RealType) {
il.append(DCMPG);
_falseList.add(
il.append(
_op == Operators.EQ
? (BranchInstruction) new IFNE(null)
: (BranchInstruction) new IFEQ(null)));
} else {
_falseList.add(
il.append(
_op == Operators.EQ
? (BranchInstruction) new IF_ICMPNE(null)
: (BranchInstruction) new IF_ICMPEQ(null)));
}
} else {
translate(classGen, methodGen);
desynthesize(classGen, methodGen);
}
}
void prepareCheckConstraint(Session session, Table table, boolean checkValues) {
// to ensure no subselects etc. are in condition
check.checkValidCheckConstraint();
if (table == null) {
check.resolveTypes(session, null);
} else {
QuerySpecification s = Expression.getCheckSelect(session, table, check);
Result r = s.getResult(session, 1);
if (r.getNavigator().getSize() != 0) {
String[] info = new String[] {table.getName().name, ""};
throw Error.error(ErrorCode.X_23504, ErrorCode.CONSTRAINT, info);
}
rangeVariable = s.rangeVariables[0];
// removes reference to the Index object in range variable
rangeVariable.setForCheckConstraint();
}
if (check.getType() == OpTypes.NOT
&& check.getLeftNode().getType() == OpTypes.IS_NULL
&& check.getLeftNode().getLeftNode().getType() == OpTypes.COLUMN) {
notNullColumnIndex = check.getLeftNode().getLeftNode().getColumnIndex();
isNotNull = true;
}
}
/** @see jaskell.compiler.JaskellVisitor#visit(QualifiedVariable) */
public Object visit(QualifiedVariable a) {
Module mod = null;
Iterator it = a.getPath().iterator();
while (it.hasNext()) {
String mname = (String) it.next();
if (mod != null) mod = (Module) mod.lookup(mname);
else mod = (Module) Module.getToplevels().get(mname);
}
/* module found */
if (mod != null) {
Expression def = mod.lookup(a.getName());
if (def == null) throw new CompilerException("Unknown variable " + a.getName());
Type t = def.getType();
if (t == null) t = (Type) def.visit(this);
/* as it is the case for variable, we assume
* that a defined symbol may be overloaded (only for primitive types)
* so we return a type variable and defers choice of
* symbol to a later stage
*/
a.setType(t);
return t;
}
throw new CompilerException("Unable to find module needed for variable " + a.getName());
}
private Rvalue compileSimpleAssignment(IntermediateCompiler ic, Scope scope)
throws SyntaxException {
Rvalue rhs = right.compileWithConversion(ic, scope, left.getType(scope).decay());
Lvalue lhs = left.compileAsLvalue(ic, scope, false);
ic.emit("store", rhs.getRegister(), "0", lhs.getRegister());
return rhs;
}
/**
* @param scalar
* @return true if the scalar is defines as $GLOBALS call
*/
private static boolean checkGLOBALS(Scalar scalar) {
final String stringValue = scalar.getStringValue();
if (scalar.getScalarType() != Scalar.TYPE_STRING || stringValue.length() < 3) {
return false;
}
final char charAtZero = stringValue.charAt(0);
final char charAtEnd = stringValue.charAt(stringValue.length() - 1);
if (!detectString(charAtZero) || !detectString(charAtEnd)) {
return false;
}
if (scalar.getParent().getType() == ASTNode.ARRAY_ACCESS) {
ArrayAccess arrayAccess = (ArrayAccess) scalar.getParent();
final Expression variableName = arrayAccess.getName();
if (variableName.getType() == ASTNode.VARIABLE) {
Variable var = (Variable) variableName;
if (var.isDollared() && var.getName() instanceof Identifier) {
final Identifier id = (Identifier) var.getName();
return id.getName().equals("_GLOBALS") // $NON-NLS-1$
|| id.getName().equals("GLOBALS"); // $NON-NLS-1$
}
}
}
return false;
}
/**
* Type check a call to a standard function. Insert CastExprs when needed. If as a result of the
* insertion of a CastExpr a type check error is thrown, then catch it and re-throw it with a new
* "this".
*/
public Type typeCheckStandard(SymbolTable stable) throws TypeCheckError {
_fname.clearNamespace(); // HACK!!!
final int n = _arguments.size();
final Vector argsType = typeCheckArgs(stable);
final MethodType args = new MethodType(Type.Void, argsType);
final MethodType ptype = lookupPrimop(stable, _fname.getLocalPart(), args);
if (ptype != null) {
for (int i = 0; i < n; i++) {
final Type argType = (Type) ptype.argsType().elementAt(i);
final Expression exp = (Expression) _arguments.elementAt(i);
if (!argType.identicalTo(exp.getType())) {
try {
_arguments.setElementAt(new CastExpr(exp, argType), i);
} catch (TypeCheckError e) {
throw new TypeCheckError(this); // invalid conversion
}
}
}
_chosenMethodType = ptype;
return _type = ptype.resultType();
}
throw new TypeCheckError(this);
}
/** Typing rules: see XSLT Reference by M. Kay page 345. */
public Type typeCheck(SymbolTable stable) throws TypeCheckError {
final Type tleft = _left.typeCheck(stable);
final Type tright = _right.typeCheck(stable);
if (tleft.isSimple() && tright.isSimple()) {
if (tleft != tright) {
if (tleft instanceof BooleanType) {
_right = new CastExpr(_right, Type.Boolean);
} else if (tright instanceof BooleanType) {
_left = new CastExpr(_left, Type.Boolean);
} else if (tleft instanceof NumberType || tright instanceof NumberType) {
_left = new CastExpr(_left, Type.Real);
_right = new CastExpr(_right, Type.Real);
} else { // both compared as strings
_left = new CastExpr(_left, Type.String);
_right = new CastExpr(_right, Type.String);
}
}
} else if (tleft instanceof ReferenceType) {
_right = new CastExpr(_right, Type.Reference);
} else if (tright instanceof ReferenceType) {
_left = new CastExpr(_left, Type.Reference);
}
// the following 2 cases optimize @attr|.|.. = 'string'
else if (tleft instanceof NodeType && tright == Type.String) {
_left = new CastExpr(_left, Type.String);
} else if (tleft == Type.String && tright instanceof NodeType) {
_right = new CastExpr(_right, Type.String);
}
// optimize node/node
else if (tleft instanceof NodeType && tright instanceof NodeType) {
_left = new CastExpr(_left, Type.String);
_right = new CastExpr(_right, Type.String);
} else if (tleft instanceof NodeType && tright instanceof NodeSetType) {
// compare(Node, NodeSet) will be invoked
} else if (tleft instanceof NodeSetType && tright instanceof NodeType) {
swapArguments(); // for compare(Node, NodeSet)
} else {
// At least one argument is of type node, node-set or result-tree
// Promote an expression of type node to node-set
if (tleft instanceof NodeType) {
_left = new CastExpr(_left, Type.NodeSet);
}
if (tright instanceof NodeType) {
_right = new CastExpr(_right, Type.NodeSet);
}
// If one arg is a node-set then make it the left one
if (tleft.isSimple() || tleft instanceof ResultTreeType && tright instanceof NodeSetType) {
swapArguments();
}
// Promote integers to doubles to have fewer compares
if (_right.getType() instanceof IntType) {
_right = new CastExpr(_right, Type.Real);
}
}
return _type = Type.Boolean;
}
public Expression staticCheck(ModuleContext context, int flags) {
caught = context.staticCheck(caught, 0);
type = caught.getType();
for (int i = 0; i < catches.length; i++) {
Catch cat = catches[i];
LocalVariable mark = context.latestLocalVariable();
if (cat.codeVarName != null) {
cat.codeVar = context.defineLocalVariable(cat.codeVarName, XQType.QNAME, this);
cat.codeVar.storageType(XQType.QNAME, context);
}
if (cat.descVarName != null) {
cat.descVar = context.defineLocalVariable(cat.descVarName, XQType.STRING, this);
cat.descVar.storageType(XQType.STRING, context);
}
if (cat.valueVarName != null) {
cat.valueVar = context.defineLocalVariable(cat.valueVarName, XQType.ANY, this);
cat.valueVar.storageType(XQType.ANY, context);
}
cat.handler = context.staticCheck(cat.handler, 0);
context.popLocalVariables(mark);
type = type.unionWith(cat.handler.getType(), true);
}
return this;
}
/**
* Sets the right-hand side of the expression.
*
* @param right the right-hand side of the expression
* @throws NullPointerException the key expression was null
* @throws IllegalArgumentException the key could not be evaluated as a number
*/
public void setRight(Expression right) {
if ((right.getType() & ExpressionUtils.EXPRESSION_TYPE_NUMBER) == 0) {
throw new IllegalArgumentException(
"Numeric expression is required for lessthanorequals operation");
}
super.setRight(right);
}
/** Get condition type error */
public String getConditionTypeError() {
String lineAndColumn = getLineNumber() + ":" + getColumnNumber() + ": ";
String error =
"Type Error: the condition expression type is "
+ condition.getType().toString()
+ " and must be int";
return lineAndColumn + error;
}
@Override
public boolean analyze(
SalsaNode parent, Map<String, SymbolType> typeEnv, Map<String, SymbolType> knownTypes) {
expression.analyze(this, typeEnv, knownTypes);
if (!expression.getType().getCanonicalName().equalsIgnoreCase("boolean"))
this.log(expression.getSalsaSource() + " needs to be a boolean type");
return super.analyze(parent, typeEnv, knownTypes);
}
private Rvalue compileCompoundAssignment(IntermediateCompiler ic, Scope scope)
throws SyntaxException {
CType leftType, rightType;
if (operator.type == BinaryExpression.Type.SHIFT) {
leftType = left.getType(scope).decay().promote();
rightType = CType.INT;
} else if (left.getType(scope).decay().isPointer()) {
leftType = new PointerType(CType.CHAR);
rightType = CType.PTRDIFF_T;
} else {
leftType =
rightType =
CType.getCommonType(left.getType(scope).decay(), right.getType(scope).decay());
}
return compileImpl(ic, scope, leftType, rightType);
}
/**
* Given a method call, first checks that it's a static method call, and if it is, returns the
* class node for the receiver. For example, with the following code: <code></code>Person.findAll
* { ... }</code>, it would return the class node for <i>Person</i>. If it's not a static method
* call, returns null.
*
* @param call a method call
* @return null if it's not a static method call, or the class node for the receiver instead.
*/
public ClassNode extractStaticReceiver(MethodCall call) {
if (call instanceof StaticMethodCallExpression) {
return ((StaticMethodCallExpression) call).getOwnerType();
} else if (call instanceof MethodCallExpression) {
Expression objectExpr = ((MethodCallExpression) call).getObjectExpression();
if (objectExpr instanceof ClassExpression
&& ClassHelper.CLASS_Type.equals(objectExpr.getType())) {
GenericsType[] genericsTypes = objectExpr.getType().getGenericsTypes();
if (genericsTypes != null && genericsTypes.length == 1) {
return genericsTypes[0].getType();
}
}
if (objectExpr instanceof ClassExpression) {
return objectExpr.getType();
}
}
return null;
}
@Override
public Class<?> getType() {
if (this.type == null) {
Expression symbol = this.command.getProjectedSymbols().iterator().next();
this.type = symbol.getType();
}
// may still be null if this.command wasn't resolved
return this.type;
}
private FunctionType getFunctionType(Scope scope) throws SyntaxException {
CType funcType = functionPointer.getType(scope).decay().dereference();
if (!funcType.isFunction()) {
throw new SyntaxException(
"Expression does not evaluate to a function pointer.", getPosition());
}
return (FunctionType) funcType;
}
private Expression translate0(RexNode expr) {
if (expr instanceof RexInputRef) {
// TODO: multiple inputs, e.g. joins
final Expression input = getInput(0);
final int index = ((RexInputRef) expr).getIndex();
final List<RelDataTypeField> fields = program.getInputRowType().getFieldList();
final RelDataTypeField field = fields.get(index);
if (fields.size() == 1) {
return input;
} else if (input.getType() == Object[].class) {
return Expressions.convert_(
Expressions.arrayIndex(input, Expressions.constant(field.getIndex())),
Types.box(JavaRules.EnumUtil.javaClass(typeFactory, field.getType())));
} else {
return Expressions.field(input, field.getName());
}
}
if (expr instanceof RexLocalRef) {
return translate(program.getExprList().get(((RexLocalRef) expr).getIndex()));
}
if (expr instanceof RexLiteral) {
return Expressions.constant(
((RexLiteral) expr).getValue(), typeFactory.getJavaClass(expr.getType()));
}
if (expr instanceof RexCall) {
final RexCall call = (RexCall) expr;
final SqlOperator operator = call.getOperator();
final ExpressionType expressionType = SQL_TO_LINQ_OPERATOR_MAP.get(operator);
if (expressionType != null) {
switch (operator.getSyntax()) {
case Binary:
return Expressions.makeBinary(
expressionType, translate(call.getOperands()[0]), translate(call.getOperands()[1]));
case Postfix:
case Prefix:
return Expressions.makeUnary(expressionType, translate(call.getOperands()[0]));
default:
throw new RuntimeException("unknown syntax " + operator.getSyntax());
}
}
Method method = SQL_OP_TO_JAVA_METHOD_MAP.get(operator);
if (method != null) {
List<Expression> exprs = translateList(Arrays.asList(call.operands));
return !Modifier.isStatic(method.getModifiers())
? Expressions.call(exprs.get(0), method, exprs.subList(1, exprs.size()))
: Expressions.call(method, exprs);
}
switch (expr.getKind()) {
default:
throw new RuntimeException("cannot translate expression " + expr);
}
}
throw new RuntimeException("cannot translate expression " + expr);
}
private void ensureNotNullArgs(Expression exp, Label nullArg) {
if (exp instanceof FixedExpression) {
if (((FixedExpression) exp).canBeNull()) {
mv.visitJumpInsn(GOTO, nullArg);
}
} else if (exp instanceof EvaluatedExpression) {
if (!exp.getType().isPrimitive()) {
jitEvaluatedExpression((EvaluatedExpression) exp, true, Object.class);
mv.visitJumpInsn(IFNULL, nullArg);
}
} else if (exp instanceof VariableExpression) {
if (!exp.getType().isPrimitive()) {
jitVariableExpression((VariableExpression) exp);
mv.visitJumpInsn(IFNULL, nullArg);
}
} else if (exp instanceof AritmeticExpression) {
ensureNotNullInAritmeticExpression((AritmeticExpression) exp, nullArg);
}
}
private void jitBinary(SingleCondition singleCondition) {
Expression left = singleCondition.getLeft();
Expression right = singleCondition.getRight();
Class<?> commonType =
singleCondition.getOperation().needsSameType()
? findCommonClass(
left.getType(), !left.canBeNull(), right.getType(), !right.canBeNull())
: null;
if (commonType == Object.class && singleCondition.getOperation().isComparison()) {
commonType = Comparable.class;
}
if (commonType != null && commonType.isPrimitive()) {
jitPrimitiveBinary(singleCondition, left, right, commonType);
} else {
jitObjectBinary(singleCondition, left, right, commonType);
}
}
/**
* Returns the value in an expression of the form 'step = value'. A value may be either a literal
* string or a variable whose type is string. Optimization if off if null is returned.
*/
public Expression getCompareValue() {
// Returned cached value if called more than once
if (_value != null) {
return _value;
}
// Nothing to to do if _exp is null
if (_exp == null) {
return null;
}
// Ignore if not an equality expression
if (_exp instanceof EqualityExpr) {
EqualityExpr exp = (EqualityExpr) _exp;
Expression left = exp.getLeft();
Expression right = exp.getRight();
// Return if left is literal string
if (left instanceof LiteralExpr) {
_value = left;
return _value;
}
// Return if left is a variable reference of type string
if (left instanceof VariableRefBase && left.getType() == Type.String) {
_value = left;
return _value;
}
// Return if right is literal string
if (right instanceof LiteralExpr) {
_value = right;
return _value;
}
// Return if left is a variable reference whose type is string
if (right instanceof VariableRefBase && right.getType() == Type.String) {
_value = right;
return _value;
}
}
return null;
}
Object[] getExpressionValues(Session session) {
Object[] values;
if (expression.getType() == OpTypes.ROW) {
values = expression.getRowValue(session);
} else if (expression.getType() == OpTypes.TABLE_SUBQUERY) {
values = expression.subQuery.queryExpression.getSingleRowValues(session);
if (values == null) {
// todo - verify semantics
return null;
}
} else {
values = new Object[1];
values[0] = expression.getValue(session, variables[0].dataType);
}
return values;
}