Examples with ForStatement org.codehaus.groovy.ast.stmt.ForStatement used on opensource projects

Example 11 with ForStatement

use of org.codehaus.groovy.ast.stmt.ForStatement 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);
}

Example 12 with ForStatement

use of org.codehaus.groovy.ast.stmt.ForStatement in project groovy by apache.

the class ForTest method testLoop.

public void testLoop() throws Exception {
    ClassNode classNode = new ClassNode("Foo", ACC_PUBLIC, ClassHelper.OBJECT_TYPE);
    classNode.addConstructor(new ConstructorNode(ACC_PUBLIC, null));
    Parameter[] parameters = { new Parameter(ClassHelper.OBJECT_TYPE.makeArray(), "coll") };
    Statement loopStatement = createPrintlnStatement(new VariableExpression("i"));
    ForStatement statement = new ForStatement(new Parameter(ClassHelper.OBJECT_TYPE, "i"), new VariableExpression("coll"), loopStatement);
    classNode.addMethod(new MethodNode("iterateDemo", ACC_PUBLIC, ClassHelper.VOID_TYPE, parameters, ClassNode.EMPTY_ARRAY, statement));
    Class fooClass = loadClass(classNode);
    assertTrue("Loaded a new class", fooClass != null);
    Object bean = fooClass.newInstance();
    assertTrue("Managed to create bean", bean != null);
    System.out.println("################ Now about to invoke a method with looping");
    Object[] array = { new Integer(1234), "abc", "def" };
    try {
        InvokerHelper.invokeMethod(bean, "iterateDemo", new Object[] { array });
    } catch (InvokerInvocationException e) {
        System.out.println("Caught: " + e.getCause());
        e.getCause().printStackTrace();
        fail("Should not have thrown an exception");
    }
    System.out.println("################ Done");
}