Examples with VariableScopeVisitor org.codehaus.groovy.classgen.VariableScopeVisitor used on opensource projects

Example 16 with VariableScopeVisitor

use of org.codehaus.groovy.classgen.VariableScopeVisitor in project groovy by apache.

the class AutoCloneASTTransformation method createCloneSerialization.

private void createCloneSerialization(ClassNode cNode) {
    final BlockStatement body = new BlockStatement();
    // def baos = new ByteArrayOutputStream()
    final Expression baos = varX("baos");
    body.addStatement(declS(baos, ctorX(BAOS_TYPE)));
    // baos.withObjectOutputStream{ it.writeObject(this) }
    MethodCallExpression writeObject = callX(castX(OOS_TYPE, varX("it")), "writeObject", varX("this"));
    writeObject.setImplicitThis(false);
    ClosureExpression writeClos = closureX(block(stmt(writeObject)));
    writeClos.setVariableScope(new VariableScope());
    body.addStatement(stmt(callX(baos, "withObjectOutputStream", args(writeClos))));
    // def bais = new ByteArrayInputStream(baos.toByteArray())
    final Expression bais = varX("bais");
    body.addStatement(declS(bais, ctorX(BAIS_TYPE, args(callX(baos, "toByteArray")))));
    // return bais.withObjectInputStream(getClass().classLoader){ (<type>) it.readObject() }
    MethodCallExpression readObject = callX(castX(OIS_TYPE, varX("it")), "readObject");
    readObject.setImplicitThis(false);
    ClosureExpression readClos = closureX(block(stmt(castX(GenericsUtils.nonGeneric(cNode), readObject))));
    readClos.setVariableScope(new VariableScope());
    Expression classLoader = callX(callThisX("getClass"), "getClassLoader");
    body.addStatement(returnS(callX(bais, "withObjectInputStream", args(classLoader, readClos))));
    new VariableScopeVisitor(sourceUnit, true).visitClass(cNode);
    ClassNode[] exceptions = { make(CloneNotSupportedException.class) };
    cNode.addMethod("clone", ACC_PUBLIC, GenericsUtils.nonGeneric(cNode), Parameter.EMPTY_ARRAY, exceptions, body);
}

Example 17 with VariableScopeVisitor

use of org.codehaus.groovy.classgen.VariableScopeVisitor in project groovy by apache.

the class SortableASTTransformation method createSortable.

private void createSortable(AnnotationNode annotation, ClassNode classNode) {
    List<String> includes = getMemberStringList(annotation, "includes");
    List<String> excludes = getMemberStringList(annotation, "excludes");
    if (!checkIncludeExcludeUndefinedAware(annotation, excludes, includes, MY_TYPE_NAME))
        return;
    if (!checkPropertyList(classNode, includes, "includes", annotation, MY_TYPE_NAME, false))
        return;
    if (!checkPropertyList(classNode, excludes, "excludes", annotation, MY_TYPE_NAME, false))
        return;
    if (classNode.isInterface()) {
        addError(MY_TYPE_NAME + " cannot be applied to interface " + classNode.getName(), annotation);
    }
    List<PropertyNode> properties = findProperties(annotation, classNode, includes, excludes);
    implementComparable(classNode);
    classNode.addMethod(new MethodNode("compareTo", ACC_PUBLIC, ClassHelper.int_TYPE, params(param(newClass(classNode), OTHER)), ClassNode.EMPTY_ARRAY, createCompareToMethodBody(properties)));
    for (PropertyNode property : properties) {
        createComparatorFor(classNode, property);
    }
    new VariableScopeVisitor(sourceUnit, true).visitClass(classNode);
}

Example 18 with VariableScopeVisitor

use of org.codehaus.groovy.classgen.VariableScopeVisitor in project groovy by apache.

the class CategoryASTTransformation method visit.

/**
     * Property invocations done on 'this' reference are transformed so that the invocations at runtime are
     * done on the additional parameter 'self'
     */
public void visit(ASTNode[] nodes, final SourceUnit source) {
    if (nodes.length != 2 || !(nodes[0] instanceof AnnotationNode) || !(nodes[1] instanceof ClassNode)) {
        source.getErrorCollector().addError(new SyntaxErrorMessage(new SyntaxException("@Category can only be added to a ClassNode but got: " + (nodes.length == 2 ? nodes[1] : "nothing"), nodes[0].getLineNumber(), nodes[0].getColumnNumber()), source));
    }
    AnnotationNode annotation = (AnnotationNode) nodes[0];
    ClassNode parent = (ClassNode) nodes[1];
    ClassNode targetClass = getTargetClass(source, annotation);
    thisExpression.setType(targetClass);
    final LinkedList<Set<String>> varStack = new LinkedList<Set<String>>();
    if (!ensureNoInstanceFieldOrProperty(source, parent))
        return;
    Set<String> names = new HashSet<String>();
    for (FieldNode field : parent.getFields()) {
        names.add(field.getName());
    }
    for (PropertyNode field : parent.getProperties()) {
        names.add(field.getName());
    }
    varStack.add(names);
    final Reference parameter = new Reference();
    final ClassCodeExpressionTransformer expressionTransformer = new ClassCodeExpressionTransformer() {

        protected SourceUnit getSourceUnit() {
            return source;
        }

        private void addVariablesToStack(Parameter[] params) {
            Set<String> names = new HashSet<String>();
            names.addAll(varStack.getLast());
            for (Parameter param : params) {
                names.add(param.getName());
            }
            varStack.add(names);
        }

        @Override
        public void visitCatchStatement(CatchStatement statement) {
            varStack.getLast().add(statement.getVariable().getName());
            super.visitCatchStatement(statement);
            varStack.getLast().remove(statement.getVariable().getName());
        }

        @Override
        public void visitMethod(MethodNode node) {
            addVariablesToStack(node.getParameters());
            super.visitMethod(node);
            varStack.removeLast();
        }

        @Override
        public void visitBlockStatement(BlockStatement block) {
            Set<String> names = new HashSet<String>();
            names.addAll(varStack.getLast());
            varStack.add(names);
            super.visitBlockStatement(block);
            varStack.remove(names);
        }

        @Override
        public void visitClosureExpression(ClosureExpression ce) {
            addVariablesToStack(ce.getParameters());
            super.visitClosureExpression(ce);
            varStack.removeLast();
        }

        @Override
        public void visitDeclarationExpression(DeclarationExpression expression) {
            if (expression.isMultipleAssignmentDeclaration()) {
                TupleExpression te = expression.getTupleExpression();
                List<Expression> list = te.getExpressions();
                for (Expression arg : list) {
                    VariableExpression ve = (VariableExpression) arg;
                    varStack.getLast().add(ve.getName());
                }
            } else {
                VariableExpression ve = expression.getVariableExpression();
                varStack.getLast().add(ve.getName());
            }
            super.visitDeclarationExpression(expression);
        }

        @Override
        public void visitForLoop(ForStatement forLoop) {
            Expression exp = forLoop.getCollectionExpression();
            exp.visit(this);
            Parameter loopParam = forLoop.getVariable();
            if (loopParam != null) {
                varStack.getLast().add(loopParam.getName());
            }
            super.visitForLoop(forLoop);
        }

        @Override
        public void visitExpressionStatement(ExpressionStatement es) {
            // GROOVY-3543: visit the declaration expressions so that declaration variables get added on the varStack
            Expression exp = es.getExpression();
            if (exp instanceof DeclarationExpression) {
                exp.visit(this);
            }
            super.visitExpressionStatement(es);
        }

        @Override
        public Expression transform(Expression exp) {
            if (exp instanceof VariableExpression) {
                VariableExpression ve = (VariableExpression) exp;
                if (ve.getName().equals("this"))
                    return thisExpression;
                else {
                    if (!varStack.getLast().contains(ve.getName())) {
                        return new PropertyExpression(thisExpression, ve.getName());
                    }
                }
            } else if (exp instanceof PropertyExpression) {
                PropertyExpression pe = (PropertyExpression) exp;
                if (pe.getObjectExpression() instanceof VariableExpression) {
                    VariableExpression vex = (VariableExpression) pe.getObjectExpression();
                    if (vex.isThisExpression()) {
                        pe.setObjectExpression(thisExpression);
                        return pe;
                    }
                }
            } else if (exp instanceof ClosureExpression) {
                ClosureExpression ce = (ClosureExpression) exp;
                ce.getVariableScope().putReferencedLocalVariable((Parameter) parameter.get());
                Parameter[] params = ce.getParameters();
                if (params == null) {
                    params = Parameter.EMPTY_ARRAY;
                } else if (params.length == 0) {
                    params = new Parameter[] { new Parameter(ClassHelper.OBJECT_TYPE, "it") };
                }
                addVariablesToStack(params);
                ce.getCode().visit(this);
                varStack.removeLast();
            }
            return super.transform(exp);
        }
    };
    for (MethodNode method : parent.getMethods()) {
        if (!method.isStatic()) {
            method.setModifiers(method.getModifiers() | Opcodes.ACC_STATIC);
            final Parameter[] origParams = method.getParameters();
            final Parameter[] newParams = new Parameter[origParams.length + 1];
            Parameter p = new Parameter(targetClass, "$this");
            p.setClosureSharedVariable(true);
            newParams[0] = p;
            parameter.set(p);
            System.arraycopy(origParams, 0, newParams, 1, origParams.length);
            method.setParameters(newParams);
            expressionTransformer.visitMethod(method);
        }
    }
    new VariableScopeVisitor(source, true).visitClass(parent);
}