Examples of org.codehaus.groovy.ast.ASTNode

org.codehaus.groovy.ast.ASTNode
Base class for any AST node. This class supports basic information used in all nodes of the AST
- line and column number information. Usually a node represents a certain area in a text file determined by a starting position and an ending position. For nodes that do not represent this, this information will be -1. A node can also be configured in its line/col information using another node through setSourcePosition(otherNode).
- every node can store meta data. A phase operation or transform can use this to transport arbitrary information to another phase operation or transform. The only requirement is that the other phase operation or transform runs after the part storing the information. If the information transport is done it is strongly recommended to remove that meta data.
a text representation of this node trough getText(). This was in the past used for assertion messages. Since the usage of power asserts this method will not be called for this purpose anymore and might be removed in future versions of Groovy

        addSetErrorsMethod(classNode);
        addClearErrorsMethod(classNode);
    }


    protected void addErrorsField(final ClassNode paramTypeClassNode) {
        final ASTNode errorsField = paramTypeClassNode.getField(ERRORS_PROPERTY_NAME);
        if (errorsField == null) {
            paramTypeClassNode.addField(new FieldNode(ERRORS_PROPERTY_NAME, Modifier.PRIVATE,
                    ERRORS_CLASS_NODE, paramTypeClassNode, NULL_EXPRESSION));
        }
    }

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                    ERRORS_CLASS_NODE, paramTypeClassNode, NULL_EXPRESSION));
        }
    }


    protected void addInitErrorsMethod(final ClassNode paramTypeClassNode) {
        final ASTNode initErrorsMethod = paramTypeClassNode.getMethod(INIT_ERRORS_METHOD_NAME, GrailsArtefactClassInjector.ZERO_PARAMETERS);
        if (initErrorsMethod == null) {
            final BlockStatement initErrorsMethodCode = new BlockStatement();


            final BinaryExpression errorsIsNullExpression = new BinaryExpression(ERRORS_EXPRESSION, Token.newSymbol(
                    Types.COMPARE_EQUAL, 0, 0), NULL_EXPRESSION);

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                    GrailsArtefactClassInjector.ZERO_PARAMETERS, GrailsArtefactClassInjector.EMPTY_CLASS_ARRAY, initErrorsMethodCode));
        }
    }


    protected void addClearErrorsMethod(final ClassNode paramTypeClassNode) {
        final ASTNode clearErrorsMethod = paramTypeClassNode.getMethod(CLEAR_ERRORS_METHOD_NAME, GrailsArtefactClassInjector.ZERO_PARAMETERS);
        if (clearErrorsMethod == null) {
            final BlockStatement clearErrorsMethodCode = new BlockStatement();
            Expression nullOutErrorsFieldExpression = new BinaryExpression(ERRORS_EXPRESSION,
                    EQUALS_SYMBOL, NULL_EXPRESSION);
            clearErrorsMethodCode.addStatement(new ExpressionStatement(nullOutErrorsFieldExpression));

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                    GrailsArtefactClassInjector.ZERO_PARAMETERS, GrailsArtefactClassInjector.EMPTY_CLASS_ARRAY, clearErrorsMethodCode));
        }
    }


    protected void addHasErrorsMethod(final ClassNode paramTypeClassNode) {
        final ASTNode getErrorsMethod = paramTypeClassNode.getMethod(HAS_ERRORS_METHOD_NAME, GrailsArtefactClassInjector.ZERO_PARAMETERS);
        if (getErrorsMethod == null) {
            final BlockStatement hasErrorsMethodCode = new BlockStatement();
            final Expression initErrorsMethodCallExpression = new MethodCallExpression(new VariableExpression("this"), INIT_ERRORS_METHOD_NAME, EMPTY_TUPLE);
            hasErrorsMethodCode.addStatement(new ExpressionStatement(initErrorsMethodCallExpression));
            final Statement returnStatement = new ReturnStatement(new BooleanExpression(new MethodCallExpression(ERRORS_EXPRESSION, HAS_ERRORS_METHOD_NAME, EMPTY_TUPLE)));

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                    GrailsArtefactClassInjector.ZERO_PARAMETERS, GrailsArtefactClassInjector.EMPTY_CLASS_ARRAY, hasErrorsMethodCode));
        }
    }


    protected void addGetErrorsMethod(final ClassNode paramTypeClassNode) {
        final ASTNode getErrorsMethod = paramTypeClassNode.getMethod(GET_ERRORS_METHOD_NAME, GrailsArtefactClassInjector.ZERO_PARAMETERS);
        if (getErrorsMethod == null) {
            final BlockStatement getErrorsMethodCode = new BlockStatement();
            final Expression initErrorsMethodCallExpression = new MethodCallExpression(new VariableExpression("this"), INIT_ERRORS_METHOD_NAME, EMPTY_TUPLE);
            getErrorsMethodCode.addStatement(new ExpressionStatement(initErrorsMethodCallExpression));
            final Statement returnStatement = new ReturnStatement(ERRORS_EXPRESSION);

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        return Pair.of(start, end);
    }


    @Override
    protected int getStartOffset(@NonNull Context context, @NonNull Object cookie) {
        ASTNode node = (ASTNode) cookie;
        Pair<Integer, Integer> offsets = getOffsets(node, context);
        return offsets.getFirst();
    }

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        return offsets.getFirst();
    }


    @Override
    protected Location createLocation(@NonNull Context context, @NonNull Object cookie) {
        ASTNode node = (ASTNode) cookie;
        Pair<Integer, Integer> offsets = getOffsets(node, context);
        int fromLine = node.getLineNumber() - 1;
        int fromColumn = node.getColumnNumber() - 1;
        int toLine = node.getLastLineNumber() - 1;
        int toColumn = node.getLastColumnNumber() - 1;
        return Location.create(context.file,
                new DefaultPosition(fromLine, fromColumn, offsets.getFirst()),
                new DefaultPosition(toLine, toColumn, offsets.getSecond()));
    }

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        assertInvalidName("a.");
        assertInvalidName("$");
    }


    protected void assertValidName(String name) {
        VerifierCodeVisitor.assertValidIdentifier(name, "variable name", new ASTNode());
    }

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        VerifierCodeVisitor.assertValidIdentifier(name, "variable name", new ASTNode());
    }


    protected void assertInvalidName(String name) {
        try {
            VerifierCodeVisitor.assertValidIdentifier(name, "variable name", new ASTNode());
            fail("Should have thrown exception due to invalid name: " + name);
        }
        catch (RuntimeParserException e) {
            System.out.println("Caught invalid exception: " + e);
        }

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    public RuntimeParserException(String message, ASTNode node) {
        super(message + "\n", node);
    }


    public void throwParserException() throws SyntaxException {
        final ASTNode node = getNode();
        throw new SyntaxException(getMessage(), node.getLineNumber(), node.getColumnNumber(), node.getLastLineNumber(), node.getLastColumnNumber());
    }

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