Examples of org.codehaus.groovy.ast.ClassNode

org.codehaus.groovy.ast.ClassNode
Represents a class in the AST.
A ClassNode should be created using the methods in ClassHelper. This ClassNode may be used to represent a class declaration or any other type. This class uses a proxy meschanism allowing to create a class for a plain name at ast creation time. In another phase of the compiler the real ClassNode for the plain name may be found. To avoid the need of exchanging this ClassNode with an instance of the correct ClassNode the correct ClassNode is set as redirect. Most method calls are then redirected to that ClassNode.
Note: the proxy mechanism is only allowed for classes being marked as primary ClassNode which means they represent no actual class. The redirect itself can be any type of ClassNode
To descirbe generic type signature see {@link #getGenericsTypes()} and{@link #setGenericsTypes(GenericsType[])}. These emthods are not proxied, they describe the type signature used at the point of declaration or the type signatures provided by the class. If the type signatures provided by the class are needed, then a call to {@link #redirect()} will help. @see org.codehaus.groovy.ast.ClassHelper @author James Strachan @author Jochen Theodorou @version $Revision: 13567 $

            checkGenericsUsage(interfaces[i], interfaces[i].redirect());
        }
    }
    
    private boolean checkWildcard(ClassNode cn) {
        ClassNode sn = cn.getUnresolvedSuperClass(false);
        if (sn==null) return false;
        GenericsType[] generics = sn.getGenericsTypes();
        if (generics==null) return false;
        boolean error=false;
        for (int i = 0; i < generics.length; i++) {
            if(generics[i].isWildcard()) {
                addError("A supertype may not specifiy a wildcard type",sn);

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                      cnTypes.length, n);
            return;
        }
        // check bounds
        for (int i=0; i<nTypes.length; i++) {
            ClassNode nType = nTypes[i].getType();
            ClassNode cnType = cnTypes[i].getType();
            if (!nType.isDerivedFrom(cnType)) {
                if (cnType.isInterface() && nType.declaresInterface(cnType)) continue;
                addError("The type "+nTypes[i].getName()+
                         " is not a valid substitute for the bounded parameter <"+
                         getPrintName(cnTypes[i])+">",n);
            }
        }

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    }
    
    private String getPrintName(GenericsType gt) {
        String ret = gt.getName();
        ClassNode[] upperBounds = gt.getUpperBounds();
        ClassNode lowerBound = gt.getLowerBound();
        if (upperBounds!=null) {
            ret += " extends ";
            for (int i = 0; i < upperBounds.length; i++) {
                ret += getPrintName(upperBounds[i]);
                if (i+1<upperBounds.length) ret += " & ";

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    public ClassNode getClassNode() {
        return currentClass;
    }


    public void visitClass(ClassNode node) {
        ClassNode oldClass = currentClass;
        currentClass = node;
        checkImplementsAndExtends(node);
        if (source != null && !source.getErrorCollector().hasErrors()) {
            checkClassForIncorrectModifiers(node);
            checkClassForOverwritingFinal(node);

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                " The " + getDescription(currentClass) + " must be declared abstract or the method '" +
                methodNode.getTypeDescriptor() + "' must not be abstract.", methodNode);
    }


    private void checkClassForOverwritingFinal(ClassNode cn) {
        ClassNode superCN = cn.getSuperClass();
        if (superCN == null) return;
        if (!Modifier.isFinal(superCN.getModifiers())) return;
        StringBuffer msg = new StringBuffer();
        msg.append("You are not allowed to overwrite the final ");
        msg.append(getDescription(superCN));
        msg.append(".");
        addError(msg.toString(), cn);

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        msg.append(".");
        addError(msg.toString(), cn);
    }


    private void checkImplementsAndExtends(ClassNode node) {
        ClassNode cn = node.getSuperClass();
        if (cn.isInterface() && !node.isInterface()) {
            addError("You are not allowed to extend the " + getDescription(cn) + ", use implements instead.", node);
        }
        ClassNode[] interfaces = node.getInterfaces();
        for (int i = 0; i < interfaces.length; i++) {
            cn = interfaces[i];
            if (!cn.isInterface()) {
                addError("You are not allowed to implement the " + getDescription(cn) + ", use extends instead.", node);
            }
        }
    }

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    protected SourceUnit getSourceUnit() {
        return source;
    }


    public void visitConstructorCallExpression(ConstructorCallExpression call) {
        ClassNode type = call.getType();
        if (Modifier.isAbstract(type.getModifiers())) {
            addError("You cannot create an instance from the abstract " + getDescription(type) + ".", call);
        }
        super.visitConstructorCallExpression(call);
    }

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        boolean hasHolder = false;
        for (int i = 0; i < paras.length; i++) {
            String name = paras[i].getName();
            Variable answer;
            ClassNode type = paras[i].getType();
            if (paras[i].isClosureSharedVariable()) {
                answer = defineVar(name, type, true);
                helper.load(type,currentVariableIndex);
                helper.box(type);
                createReference(answer);

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        }
        return gts;
    }
    
    private GenericsType configureTypeVariableDefintion(TypeVariable tv) {
       ClassNode base = configureTypeVariableReference(tv);
       Type[] tBounds = tv.getBounds();
       if (tBounds.length==0) return new GenericsType(base);
       ClassNode[] cBounds = new ClassNode[tBounds.length];
       for (int i = 0; i < tBounds.length; i++) {
           cBounds[i] = configureType(tBounds[i]);

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    private ClassNode configureWildcardType(WildcardType wildcardType) {
        throw new GroovyBugError("Not yet implemented");
    }
    
    private ClassNode configureParameterizedType(ParameterizedType parameterizedType) {
        ClassNode base = configureType(parameterizedType.getRawType());
        GenericsType[] gts = configureTypeArguments(parameterizedType.getActualTypeArguments());
        base.setGenericsTypes(gts);
        return base;
    }

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