Examples of org.antlr.runtime.tree.CommonTree

org.antlr.runtime.tree.CommonTree
A tree node that is wrapper for a Token object. After 3.0 release while building tree rewrite stuff, it became clear that computing parent and child index is very difficult and cumbersome. Better to spend the space in every tree node. If you don't want these extra fields, it's easy to cut them out in your own BaseTree subclass.

     * @param alterTableDef
     * @return
     */
    private String getAlterTableName(SqlJetAlterTableDef alterTableDef) {
        final ParserRuleReturnScope parsedSql = alterTableDef.getParsedSql();
        final CommonTree ast = (CommonTree) parsedSql.getTree();
        final CommonToken stopToken = (CommonToken) parsedSql.getStop();
        final CommonToken nameToken = (CommonToken) ((CommonTree) ast.getChild(ast.getChildCount() - 1)).getToken();
        final CharStream inputStream = nameToken.getInputStream();
        return inputStream.substring(nameToken.getStartIndex(), stopToken.getStopIndex());
    }

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     * @throws SqlJetException
     */
    private String getTableAlteredSql(String sql, SqlJetAlterTableDef alterTableDef) throws SqlJetException {


        final RuleReturnScope parsedSQL = parseTable(sql);
        final CommonTree ast = (CommonTree) parsedSQL.getTree();
        final CommonToken nameToken = (CommonToken) ((CommonTree) ast.getChild(1)).getToken();
        final CharStream inputStream = nameToken.getInputStream();
        final CommonToken stopToken = (CommonToken) parsedSQL.getStop();


        final StringBuilder b = new StringBuilder();

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     * @return
     * @throws SqlJetException
     */
    private String getAlteredIndexSql(String sql, String alterTableName) throws SqlJetException {
        final RuleReturnScope parsedSQL = parseIndex(sql);
        final CommonTree ast = (CommonTree) parsedSQL.getTree();
        final CommonToken nameToken = (CommonToken) ((CommonTree) ast.getChild(2)).getToken();
        final CharStream inputStream = nameToken.getInputStream();
        final CommonToken stopToken = (CommonToken) parsedSQL.getStop();
        final StringBuilder b = new StringBuilder();
        b.append(inputStream.substring(0, nameToken.getStartIndex() - 1));
        b.append(alterTableName);

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    }


    private ISqlJetVirtualTableDef createVirtualTableSafe(String sql, int page) throws SqlJetException {


        final RuleReturnScope parseTable = parseTable(sql);
        final CommonTree ast = (CommonTree) parseTable.getTree();


        if (!isCreateVirtualTable(ast)) {
            throw new SqlJetException(SqlJetErrorCode.ERROR);
        }

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    }




    private ISqlJetViewDef createViewSafe(String sql) throws SqlJetException {
        final RuleReturnScope parseView = parseView(sql);
        final CommonTree ast = (CommonTree) parseView.getTree();
        
        sql = sql.trim();
        if (sql.endsWith(";")) {
            sql = sql.substring(0, sql.length() - 1);
        }

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        }
    }


    private ISqlJetTriggerDef createTriggerSafe(String sql) throws SqlJetException {
        final RuleReturnScope parseView = parseTrigger(sql);
        final CommonTree ast = (CommonTree) parseView.getTree();
        
        sql = sql.trim();
        if (sql.endsWith(";")) {
            sql = sql.substring(0, sql.length() - 1);
        }

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    private final boolean not;


    public SqlJetBetweenExpression(CommonTree ast) throws SqlJetException {
        assert "between".equalsIgnoreCase(ast.getText());
        int idx = 0;
        CommonTree child = (CommonTree) ast.getChild(idx++);
        if ("not".equalsIgnoreCase(child.getText())) {
            not = true;
            child = (CommonTree) ast.getChild(idx++);
        } else {
            not = false;
        }

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    }


    public SqlJetIndexDef(CommonTree ast, int page) {
        super(null, null, page);


        CommonTree optionsNode = (CommonTree) ast.getChild(0);
        unique = hasOption(optionsNode, "unique");
        ifNotExists = hasOption(optionsNode, "exists");


        CommonTree nameNode = (CommonTree) ast.getChild(1);
        setName(nameNode.getText());
        databaseName = nameNode.getChildCount() > 0 ? nameNode.getChild(0).getText() : null;


        CommonTree tableNameNode = (CommonTree) ast.getChild(2);
        setTableName(tableNameNode.getText());


        List<ISqlJetIndexedColumn> columns = new ArrayList<ISqlJetIndexedColumn>();
        CommonTree defNode = (CommonTree) ast.getChild(3);
        for (int i = 0; i < defNode.getChildCount(); i++) {
            columns.add(new SqlJetIndexedColumn((CommonTree) defNode.getChild(i)));
        }
        this.columns = Collections.unmodifiableList(columns);
    }

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        this.columns = Collections.unmodifiableList(columns);
    }


    private boolean hasOption(CommonTree optionsNode, String name) {
        for (int i = 0; i < optionsNode.getChildCount(); i++) {
            CommonTree optionNode = (CommonTree) optionsNode.getChild(i);
            if (name.equalsIgnoreCase(optionNode.getText())) {
                return true;
            }
        }
        return false;
    }

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    private final ISqlJetTypeDef type;
    private final List<ISqlJetColumnConstraint> constraints;


    public SqlJetColumnDef(CommonTree ast) throws SqlJetException {
        name = ast.getText();
        CommonTree constraintsNode = (CommonTree) ast.getChild(0);
        assert "constraints".equalsIgnoreCase(constraintsNode.getText());
        List<ISqlJetColumnConstraint> constraints = new ArrayList<ISqlJetColumnConstraint>();
        for (int i = 0; i < constraintsNode.getChildCount(); i++) {
            CommonTree constraintRootNode = (CommonTree) constraintsNode.getChild(i);
            assert "column_constraint".equalsIgnoreCase(constraintRootNode.getText());
            CommonTree constraintNode = (CommonTree) constraintRootNode.getChild(0);
            String constraintType = constraintNode.getText();
            String constraintName = constraintRootNode.getChildCount() > 1 ? constraintRootNode.getChild(1).getText()
                    : null;
            if ("primary".equalsIgnoreCase(constraintType)) {
                constraints.add(new SqlJetColumnPrimaryKey(this, constraintName, constraintNode));
            } else if ("not_null".equalsIgnoreCase(constraintType)) {
                constraints.add(new SqlJetColumnNotNull(this, constraintName, constraintNode));
            } else if ("unique".equalsIgnoreCase(constraintType)) {
                constraints.add(new SqlJetColumnUnique(this, constraintName, constraintNode));
            } else if ("check".equalsIgnoreCase(constraintType)) {
                constraints.add(new SqlJetColumnCheck(this, constraintName, constraintNode));
            } else if ("default".equalsIgnoreCase(constraintType)) {
                constraints.add(new SqlJetColumnDefault(this, constraintName, constraintNode));
            } else if ("collate".equalsIgnoreCase(constraintType)) {
                constraints.add(new SqlJetColumnCollate(this, constraintName, constraintNode));
            } else if ("references".equalsIgnoreCase(constraintType)) {
                constraints.add(new SqlJetColumnForeignKey(constraintName, constraintNode));
            } else if ("is_null".equalsIgnoreCase(constraintType)) {
                constraints.add(new SqlJetColumnNull(this, constraintName, constraintNode));
            } else {
                assert false;
            }
        }
        this.constraints = Collections.unmodifiableList(constraints);
        if (ast.getChildCount() > 1) {
            CommonTree typeNode = (CommonTree) ast.getChild(1);
            assert "type".equalsIgnoreCase(typeNode.getText());
            type = new SqlJetTypeDef(typeNode);
        } else {
            type = null;
        }
    }

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