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Example 21 with VariableExpression

use of org.codehaus.groovy.ast.expr.VariableExpression in project groovy by apache.

the class ClosureWriter method correctAccessedVariable.

private static void correctAccessedVariable(final InnerClassNode closureClass, ClosureExpression ce) {
    CodeVisitorSupport visitor = new CodeVisitorSupport() {

        @Override
        public void visitVariableExpression(VariableExpression expression) {
            Variable v = expression.getAccessedVariable();
            if (v == null)
                return;
            if (!(v instanceof FieldNode))
                return;
            String name = expression.getName();
            FieldNode fn = closureClass.getDeclaredField(name);
            if (fn != null) {
                // only overwrite if we find something more specific
                expression.setAccessedVariable(fn);
            }
        }
    };
    visitor.visitClosureExpression(ce);
}
Also used : CodeVisitorSupport(org.codehaus.groovy.ast.CodeVisitorSupport) Variable(org.codehaus.groovy.ast.Variable) FieldNode(org.codehaus.groovy.ast.FieldNode) VariableExpression(org.codehaus.groovy.ast.expr.VariableExpression)

Example 22 with VariableExpression

use of org.codehaus.groovy.ast.expr.VariableExpression in project groovy by apache.

the class Verifier method addGroovyObjectInterfaceAndMethods.

protected void addGroovyObjectInterfaceAndMethods(ClassNode node, final String classInternalName) {
    if (!node.isDerivedFromGroovyObject())
        node.addInterface(ClassHelper.make(GroovyObject.class));
    FieldNode metaClassField = getMetaClassField(node);
    if (!node.hasMethod("getMetaClass", Parameter.EMPTY_ARRAY)) {
        metaClassField = setMetaClassFieldIfNotExists(node, metaClassField);
        addMethod(node, !isAbstract(node.getModifiers()), "getMetaClass", ACC_PUBLIC, ClassHelper.METACLASS_TYPE, Parameter.EMPTY_ARRAY, ClassNode.EMPTY_ARRAY, new BytecodeSequence(new BytecodeInstruction() {

            public void visit(MethodVisitor mv) {
                Label nullLabel = new Label();
                /**
                             *  the code is:
                             *  if (this.metaClass==null) {
                             *      this.metaClass = this.$getStaticMetaClass
                             *      return this.metaClass
                             *  } else {
                             *      return this.metaClass
                             *  }
                             *  with the optimization that the result of the
                             *  first this.metaClass is duped on the operand
                             *  stack and reused for the return in the else part
                             */
                mv.visitVarInsn(ALOAD, 0);
                mv.visitFieldInsn(GETFIELD, classInternalName, "metaClass", "Lgroovy/lang/MetaClass;");
                mv.visitInsn(DUP);
                mv.visitJumpInsn(IFNULL, nullLabel);
                mv.visitInsn(ARETURN);
                mv.visitLabel(nullLabel);
                mv.visitInsn(POP);
                mv.visitVarInsn(ALOAD, 0);
                mv.visitInsn(DUP);
                mv.visitMethodInsn(INVOKEVIRTUAL, classInternalName, "$getStaticMetaClass", "()Lgroovy/lang/MetaClass;", false);
                mv.visitFieldInsn(PUTFIELD, classInternalName, "metaClass", "Lgroovy/lang/MetaClass;");
                mv.visitVarInsn(ALOAD, 0);
                mv.visitFieldInsn(GETFIELD, classInternalName, "metaClass", "Lgroovy/lang/MetaClass;");
                mv.visitInsn(ARETURN);
            }
        }));
    }
    Parameter[] parameters = new Parameter[] { new Parameter(ClassHelper.METACLASS_TYPE, "mc") };
    if (!node.hasMethod("setMetaClass", parameters)) {
        metaClassField = setMetaClassFieldIfNotExists(node, metaClassField);
        Statement setMetaClassCode;
        if (isFinal(metaClassField.getModifiers())) {
            ConstantExpression text = new ConstantExpression("cannot set read-only meta class");
            ConstructorCallExpression cce = new ConstructorCallExpression(ClassHelper.make(IllegalArgumentException.class), text);
            setMetaClassCode = new ExpressionStatement(cce);
        } else {
            List list = new ArrayList();
            list.add(new BytecodeInstruction() {

                public void visit(MethodVisitor mv) {
                    /**
                         * the code is (meta class is stored in 1):
                         * this.metaClass = <1>
                         */
                    mv.visitVarInsn(ALOAD, 0);
                    mv.visitVarInsn(ALOAD, 1);
                    mv.visitFieldInsn(PUTFIELD, classInternalName, "metaClass", "Lgroovy/lang/MetaClass;");
                    mv.visitInsn(RETURN);
                }
            });
            setMetaClassCode = new BytecodeSequence(list);
        }
        addMethod(node, !isAbstract(node.getModifiers()), "setMetaClass", ACC_PUBLIC, ClassHelper.VOID_TYPE, SET_METACLASS_PARAMS, ClassNode.EMPTY_ARRAY, setMetaClassCode);
    }
    if (!node.hasMethod("invokeMethod", INVOKE_METHOD_PARAMS)) {
        VariableExpression vMethods = new VariableExpression("method");
        VariableExpression vArguments = new VariableExpression("arguments");
        VariableScope blockScope = new VariableScope();
        blockScope.putReferencedLocalVariable(vMethods);
        blockScope.putReferencedLocalVariable(vArguments);
        addMethod(node, !isAbstract(node.getModifiers()), "invokeMethod", ACC_PUBLIC, ClassHelper.OBJECT_TYPE, INVOKE_METHOD_PARAMS, ClassNode.EMPTY_ARRAY, new BytecodeSequence(new BytecodeInstruction() {

            public void visit(MethodVisitor mv) {
                mv.visitVarInsn(ALOAD, 0);
                mv.visitMethodInsn(INVOKEVIRTUAL, classInternalName, "getMetaClass", "()Lgroovy/lang/MetaClass;", false);
                mv.visitVarInsn(ALOAD, 0);
                mv.visitVarInsn(ALOAD, 1);
                mv.visitVarInsn(ALOAD, 2);
                mv.visitMethodInsn(INVOKEINTERFACE, "groovy/lang/MetaClass", "invokeMethod", "(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)Ljava/lang/Object;", true);
                mv.visitInsn(ARETURN);
            }
        }));
    }
    if (!node.hasMethod("getProperty", GET_PROPERTY_PARAMS)) {
        addMethod(node, !isAbstract(node.getModifiers()), "getProperty", ACC_PUBLIC, ClassHelper.OBJECT_TYPE, GET_PROPERTY_PARAMS, ClassNode.EMPTY_ARRAY, new BytecodeSequence(new BytecodeInstruction() {

            public void visit(MethodVisitor mv) {
                mv.visitVarInsn(ALOAD, 0);
                mv.visitMethodInsn(INVOKEVIRTUAL, classInternalName, "getMetaClass", "()Lgroovy/lang/MetaClass;", false);
                mv.visitVarInsn(ALOAD, 0);
                mv.visitVarInsn(ALOAD, 1);
                mv.visitMethodInsn(INVOKEINTERFACE, "groovy/lang/MetaClass", "getProperty", "(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;", true);
                mv.visitInsn(ARETURN);
            }
        }));
    }
    if (!node.hasMethod("setProperty", SET_PROPERTY_PARAMS)) {
        addMethod(node, !isAbstract(node.getModifiers()), "setProperty", ACC_PUBLIC, ClassHelper.VOID_TYPE, SET_PROPERTY_PARAMS, ClassNode.EMPTY_ARRAY, new BytecodeSequence(new BytecodeInstruction() {

            public void visit(MethodVisitor mv) {
                mv.visitVarInsn(ALOAD, 0);
                mv.visitMethodInsn(INVOKEVIRTUAL, classInternalName, "getMetaClass", "()Lgroovy/lang/MetaClass;", false);
                mv.visitVarInsn(ALOAD, 0);
                mv.visitVarInsn(ALOAD, 1);
                mv.visitVarInsn(ALOAD, 2);
                mv.visitMethodInsn(INVOKEINTERFACE, "groovy/lang/MetaClass", "setProperty", "(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V", true);
                mv.visitInsn(RETURN);
            }
        }));
    }
}
Also used : BlockStatement(org.codehaus.groovy.ast.stmt.BlockStatement) Statement(org.codehaus.groovy.ast.stmt.Statement) ExpressionStatement(org.codehaus.groovy.ast.stmt.ExpressionStatement) ReturnStatement(org.codehaus.groovy.ast.stmt.ReturnStatement) ConstructorCallExpression(org.codehaus.groovy.ast.expr.ConstructorCallExpression) ConstantExpression(org.codehaus.groovy.ast.expr.ConstantExpression) Label(org.objectweb.asm.Label) ArrayList(java.util.ArrayList) VariableExpression(org.codehaus.groovy.ast.expr.VariableExpression) MethodVisitor(org.objectweb.asm.MethodVisitor) ExpressionStatement(org.codehaus.groovy.ast.stmt.ExpressionStatement) List(java.util.List) ArrayList(java.util.ArrayList)

Example 23 with VariableExpression

use of org.codehaus.groovy.ast.expr.VariableExpression in project groovy by apache.

the class Verifier method addDefaultParameters.

protected void addDefaultParameters(DefaultArgsAction action, MethodNode method) {
    Parameter[] parameters = method.getParameters();
    int counter = 0;
    List paramValues = new ArrayList();
    int size = parameters.length;
    for (int i = size - 1; i >= 0; i--) {
        Parameter parameter = parameters[i];
        if (parameter != null && parameter.hasInitialExpression()) {
            paramValues.add(i);
            paramValues.add(new CastExpression(parameter.getType(), parameter.getInitialExpression()));
            counter++;
        }
    }
    for (int j = 1; j <= counter; j++) {
        Parameter[] newParams = new Parameter[parameters.length - j];
        ArgumentListExpression arguments = new ArgumentListExpression();
        int index = 0;
        int k = 1;
        for (Parameter parameter : parameters) {
            if (parameter == null) {
                throw new GroovyBugError("Parameter should not be null for method " + methodNode.getName());
            } else {
                if (k > counter - j && parameter.hasInitialExpression()) {
                    arguments.addExpression(new CastExpression(parameter.getType(), parameter.getInitialExpression()));
                    k++;
                } else if (parameter.hasInitialExpression()) {
                    newParams[index++] = parameter;
                    arguments.addExpression(new CastExpression(parameter.getType(), new VariableExpression(parameter.getName())));
                    k++;
                } else {
                    newParams[index++] = parameter;
                    arguments.addExpression(new CastExpression(parameter.getType(), new VariableExpression(parameter.getName())));
                }
            }
        }
        action.call(arguments, newParams, method);
    }
    for (Parameter parameter : parameters) {
        // remove default expression and store it as node metadata
        parameter.putNodeMetaData(Verifier.INITIAL_EXPRESSION, parameter.getInitialExpression());
        parameter.setInitialExpression(null);
    }
}
Also used : ArrayList(java.util.ArrayList) GroovyBugError(org.codehaus.groovy.GroovyBugError) ArgumentListExpression(org.codehaus.groovy.ast.expr.ArgumentListExpression) List(java.util.List) ArrayList(java.util.ArrayList) VariableExpression(org.codehaus.groovy.ast.expr.VariableExpression) CastExpression(org.codehaus.groovy.ast.expr.CastExpression)

Example 24 with VariableExpression

use of org.codehaus.groovy.ast.expr.VariableExpression in project groovy by apache.

the class ClassCompletionVerifier method checkFinalFieldAccess.

private void checkFinalFieldAccess(Expression expression) {
    if (!(expression instanceof VariableExpression) && !(expression instanceof PropertyExpression))
        return;
    Variable v = null;
    if (expression instanceof VariableExpression) {
        VariableExpression ve = (VariableExpression) expression;
        v = ve.getAccessedVariable();
    } else {
        PropertyExpression propExp = ((PropertyExpression) expression);
        Expression objectExpression = propExp.getObjectExpression();
        if (objectExpression instanceof VariableExpression) {
            VariableExpression varExp = (VariableExpression) objectExpression;
            if (varExp.isThisExpression()) {
                v = currentClass.getDeclaredField(propExp.getPropertyAsString());
            }
        }
    }
    if (v instanceof FieldNode) {
        FieldNode fn = (FieldNode) v;
        /*
             *  if it is static final but not accessed inside a static constructor, or,
             *  if it is an instance final but not accessed inside a instance constructor, it is an error
             */
        boolean isFinal = fn.isFinal();
        boolean isStatic = fn.isStatic();
        boolean error = isFinal && ((isStatic && !inStaticConstructor) || (!isStatic && !inConstructor));
        if (error)
            addError("cannot modify" + (isStatic ? " static" : "") + " final field '" + fn.getName() + "' outside of " + (isStatic ? "static initialization block." : "constructor."), expression);
    }
}
Also used : PropertyExpression(org.codehaus.groovy.ast.expr.PropertyExpression) ConstantExpression(org.codehaus.groovy.ast.expr.ConstantExpression) MethodCallExpression(org.codehaus.groovy.ast.expr.MethodCallExpression) Expression(org.codehaus.groovy.ast.expr.Expression) VariableExpression(org.codehaus.groovy.ast.expr.VariableExpression) DeclarationExpression(org.codehaus.groovy.ast.expr.DeclarationExpression) TupleExpression(org.codehaus.groovy.ast.expr.TupleExpression) BinaryExpression(org.codehaus.groovy.ast.expr.BinaryExpression) GStringExpression(org.codehaus.groovy.ast.expr.GStringExpression) MapEntryExpression(org.codehaus.groovy.ast.expr.MapEntryExpression) VariableExpression(org.codehaus.groovy.ast.expr.VariableExpression) PropertyExpression(org.codehaus.groovy.ast.expr.PropertyExpression)

Example 25 with VariableExpression

use of org.codehaus.groovy.ast.expr.VariableExpression in project groovy by apache.

the class BinaryExpressionHelper method evaluateEqual.

public void evaluateEqual(BinaryExpression expression, boolean defineVariable) {
    AsmClassGenerator acg = controller.getAcg();
    CompileStack compileStack = controller.getCompileStack();
    OperandStack operandStack = controller.getOperandStack();
    Expression rightExpression = expression.getRightExpression();
    Expression leftExpression = expression.getLeftExpression();
    ClassNode lhsType = controller.getTypeChooser().resolveType(leftExpression, controller.getClassNode());
    if (defineVariable && rightExpression instanceof EmptyExpression && !(leftExpression instanceof TupleExpression)) {
        VariableExpression ve = (VariableExpression) leftExpression;
        BytecodeVariable var = compileStack.defineVariable(ve, controller.getTypeChooser().resolveType(ve, controller.getClassNode()), false);
        operandStack.loadOrStoreVariable(var, false);
        return;
    }
    // let's evaluate the RHS and store the result
    ClassNode rhsType;
    if (rightExpression instanceof ListExpression && lhsType.isArray()) {
        ListExpression list = (ListExpression) rightExpression;
        ArrayExpression array = new ArrayExpression(lhsType.getComponentType(), list.getExpressions());
        array.setSourcePosition(list);
        array.visit(acg);
    } else if (rightExpression instanceof EmptyExpression) {
        rhsType = leftExpression.getType();
        loadInitValue(rhsType);
    } else {
        rightExpression.visit(acg);
    }
    rhsType = operandStack.getTopOperand();
    boolean directAssignment = defineVariable && !(leftExpression instanceof TupleExpression);
    int rhsValueId;
    if (directAssignment) {
        VariableExpression var = (VariableExpression) leftExpression;
        if (var.isClosureSharedVariable() && ClassHelper.isPrimitiveType(rhsType)) {
            // GROOVY-5570: if a closure shared variable is a primitive type, it must be boxed
            rhsType = ClassHelper.getWrapper(rhsType);
            operandStack.box();
        }
        // form as it is closure shared
        if (var.isClosureSharedVariable() && ClassHelper.isPrimitiveType(var.getOriginType()) && isNull(rightExpression)) {
            operandStack.doGroovyCast(var.getOriginType());
            // these two are never reached in bytecode and only there 
            // to avoid verifyerrors and compiler infrastructure hazzle
            operandStack.box();
            operandStack.doGroovyCast(lhsType);
        }
        // normal type transformation 
        if (!ClassHelper.isPrimitiveType(lhsType) && isNull(rightExpression)) {
            operandStack.replace(lhsType);
        } else {
            operandStack.doGroovyCast(lhsType);
        }
        rhsType = lhsType;
        rhsValueId = compileStack.defineVariable(var, lhsType, true).getIndex();
    } else {
        rhsValueId = compileStack.defineTemporaryVariable("$rhs", rhsType, true);
    }
    //TODO: if rhs is VariableSlotLoader already, then skip crating a new one
    BytecodeExpression rhsValueLoader = new VariableSlotLoader(rhsType, rhsValueId, operandStack);
    // assignment for subscript
    if (leftExpression instanceof BinaryExpression) {
        BinaryExpression leftBinExpr = (BinaryExpression) leftExpression;
        if (leftBinExpr.getOperation().getType() == Types.LEFT_SQUARE_BRACKET) {
            assignToArray(expression, leftBinExpr.getLeftExpression(), leftBinExpr.getRightExpression(), rhsValueLoader);
        }
        compileStack.removeVar(rhsValueId);
        return;
    }
    compileStack.pushLHS(true);
    // multiple declaration
    if (leftExpression instanceof TupleExpression) {
        TupleExpression tuple = (TupleExpression) leftExpression;
        int i = 0;
        for (Expression e : tuple.getExpressions()) {
            VariableExpression var = (VariableExpression) e;
            MethodCallExpression call = new MethodCallExpression(rhsValueLoader, "getAt", new ArgumentListExpression(new ConstantExpression(i)));
            call.visit(acg);
            i++;
            if (defineVariable) {
                operandStack.doGroovyCast(var);
                compileStack.defineVariable(var, true);
                operandStack.remove(1);
            } else {
                acg.visitVariableExpression(var);
            }
        }
    } else // single declaration
    if (defineVariable) {
        rhsValueLoader.visit(acg);
        operandStack.remove(1);
        compileStack.popLHS();
        return;
    } else // normal assignment
    {
        int mark = operandStack.getStackLength();
        // to leave a copy of the rightExpression value on the stack after the assignment.
        rhsValueLoader.visit(acg);
        TypeChooser typeChooser = controller.getTypeChooser();
        ClassNode targetType = typeChooser.resolveType(leftExpression, controller.getClassNode());
        operandStack.doGroovyCast(targetType);
        leftExpression.visit(acg);
        operandStack.remove(operandStack.getStackLength() - mark);
    }
    compileStack.popLHS();
    // return value of assignment
    rhsValueLoader.visit(acg);
    compileStack.removeVar(rhsValueId);
}
Also used : ClassNode(org.codehaus.groovy.ast.ClassNode) ListExpression(org.codehaus.groovy.ast.expr.ListExpression) ArgumentListExpression(org.codehaus.groovy.ast.expr.ArgumentListExpression) ConstantExpression(org.codehaus.groovy.ast.expr.ConstantExpression) TupleExpression(org.codehaus.groovy.ast.expr.TupleExpression) ArgumentListExpression(org.codehaus.groovy.ast.expr.ArgumentListExpression) VariableExpression(org.codehaus.groovy.ast.expr.VariableExpression) AsmClassGenerator(org.codehaus.groovy.classgen.AsmClassGenerator) EmptyExpression(org.codehaus.groovy.ast.expr.EmptyExpression) BinaryExpression(org.codehaus.groovy.ast.expr.BinaryExpression) MethodCallExpression(org.codehaus.groovy.ast.expr.MethodCallExpression) ListExpression(org.codehaus.groovy.ast.expr.ListExpression) PropertyExpression(org.codehaus.groovy.ast.expr.PropertyExpression) ElvisOperatorExpression(org.codehaus.groovy.ast.expr.ElvisOperatorExpression) ConstantExpression(org.codehaus.groovy.ast.expr.ConstantExpression) PrefixExpression(org.codehaus.groovy.ast.expr.PrefixExpression) PostfixExpression(org.codehaus.groovy.ast.expr.PostfixExpression) MethodCallExpression(org.codehaus.groovy.ast.expr.MethodCallExpression) BytecodeExpression(org.codehaus.groovy.classgen.BytecodeExpression) EmptyExpression(org.codehaus.groovy.ast.expr.EmptyExpression) Expression(org.codehaus.groovy.ast.expr.Expression) VariableExpression(org.codehaus.groovy.ast.expr.VariableExpression) ArrayExpression(org.codehaus.groovy.ast.expr.ArrayExpression) ArgumentListExpression(org.codehaus.groovy.ast.expr.ArgumentListExpression) ClassExpression(org.codehaus.groovy.ast.expr.ClassExpression) TupleExpression(org.codehaus.groovy.ast.expr.TupleExpression) BinaryExpression(org.codehaus.groovy.ast.expr.BinaryExpression) FieldExpression(org.codehaus.groovy.ast.expr.FieldExpression) TernaryExpression(org.codehaus.groovy.ast.expr.TernaryExpression) ArrayExpression(org.codehaus.groovy.ast.expr.ArrayExpression) BytecodeExpression(org.codehaus.groovy.classgen.BytecodeExpression)

Aggregations

VariableExpression (org.codehaus.groovy.ast.expr.VariableExpression)174 Expression (org.codehaus.groovy.ast.expr.Expression)84 MethodCallExpression (org.codehaus.groovy.ast.expr.MethodCallExpression)84 ArgumentListExpression (org.codehaus.groovy.ast.expr.ArgumentListExpression)76 ConstantExpression (org.codehaus.groovy.ast.expr.ConstantExpression)70 BinaryExpression (org.codehaus.groovy.ast.expr.BinaryExpression)66 ClassExpression (org.codehaus.groovy.ast.expr.ClassExpression)59 BlockStatement (org.codehaus.groovy.ast.stmt.BlockStatement)58 ClassNode (org.codehaus.groovy.ast.ClassNode)52 ExpressionStatement (org.codehaus.groovy.ast.stmt.ExpressionStatement)52 PropertyExpression (org.codehaus.groovy.ast.expr.PropertyExpression)47 TupleExpression (org.codehaus.groovy.ast.expr.TupleExpression)47 ConstructorCallExpression (org.codehaus.groovy.ast.expr.ConstructorCallExpression)46 ClosureExpression (org.codehaus.groovy.ast.expr.ClosureExpression)43 Parameter (org.codehaus.groovy.ast.Parameter)40 DeclarationExpression (org.codehaus.groovy.ast.expr.DeclarationExpression)40 MethodNode (org.codehaus.groovy.ast.MethodNode)37 FieldNode (org.codehaus.groovy.ast.FieldNode)36 BooleanExpression (org.codehaus.groovy.ast.expr.BooleanExpression)35 Statement (org.codehaus.groovy.ast.stmt.Statement)33