Examples of org.antlr.runtime.tree.Tree

org.antlr.runtime.tree.Tree
What does a tree look like? ANTLR has a number of support classes such as CommonTreeNodeStream that work on these kinds of trees. You don't have to make your trees implement this interface, but if you do, you'll be able to use more support code. NOTE: When constructing trees, ANTLR can build any kind of tree; it can even use Token objects as trees if you add a child list to your tokens. This is a tree node without any payload; just navigation and factory stuff.

    }


    // process a statement of the form: connect hostname/port
    private void executeConnect(Tree statement)
    {
        Tree idList = statement.getChild(0);
        int portNumber = Integer.parseInt(statement.getChild(1).getText());


        StringBuilder hostName = new StringBuilder();
        int idCount = idList.getChildCount(); 
        for (int idx = 0; idx < idCount; idx++)
        {
            hostName.append(idList.getChild(idx).getText());
        }
        
        // disconnect current connection, if any.
        // This is a no-op, if you aren't currently connected.
        CliMain.disconnect();

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        List<ColumnDef> columnDefinitions = new ArrayList<ColumnDef>();
        
        // each child node is a ^(HASH ...)
        for (int i = 0; i < meta.getChildCount(); i++)
        {
            Tree metaHash = meta.getChild(i);


            ColumnDef columnDefinition = new ColumnDef();
            
            // each child node is ^(PAIR $key $value)
            for (int j = 0; j < metaHash.getChildCount(); j++)
            {
                Tree metaPair = metaHash.getChild(j);


                // current $key
                String metaKey = CliUtils.unescapeSQLString(metaPair.getChild(0).getText());
                // current $value
                String metaVal = CliUtils.unescapeSQLString(metaPair.getChild(1).getText());


                if (metaKey.equals("column_name"))
                {
                    if (cfDef.column_type.equals("Super"))
                        columnDefinition.setName(subColumnNameAsByteArray(metaVal, cfDef));

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        Map<String, String> strategyOptions = new HashMap<String, String>();


        // each child node is a ^(HASH ...)
        for (int i = 0; i < options.getChildCount(); i++)
        {
            Tree optionsHash = options.getChild(i);
            
            // each child node is ^(PAIR $key $value)
            for (int j = 0; j < optionsHash.getChildCount(); j++)
            {
                Tree optionPair = optionsHash.getChild(j);


                // current $key
                String key = CliUtils.unescapeSQLString(optionPair.getChild(0).getText());
                // current $value
                String val = CliUtils.unescapeSQLString(optionPair.getChild(1).getText());


                strategyOptions.put(key, val);
            }
        }

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     * @return byte[] - string value as byte[]
     */
    private ByteBuffer convertValueByFunction(Tree functionCall, CfDef columnFamily, ByteBuffer columnName, boolean withUpdate)
    {
        String functionName = functionCall.getChild(0).getText();
        Tree argumentTree = functionCall.getChild(1);
        String functionArg  = (argumentTree == null) ? "" : CliUtils.unescapeSQLString(argumentTree.getText());
        AbstractType validator = getTypeByFunction(functionName);


        try
        {

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            return true;
        }


        int count = node.getChildCount();
        for (int i=0; i<count && !found; i++) {
            Tree child = node.getChild(i);
            found = traverseTreeAndFindNodeInColumnMap(child, colRefs);
        }
        return found;
    }

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        if (node==colRef) {
            return true;
        }
        boolean found = false;
        for (int i=0; i<count && !found; i++) {
            Tree child = node.getChild(i);
            found = traverseTreeAndFindNodeInColumnMap2(child, colRef);
        }
        return found;
    }

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    public void printTreeTest() {
        // System.out.println("printTreeTest():");
        String statement = "SELECT p1, p2, p3.t3 mycol FROM MyType AS MyAlias WHERE p1='abc' and p2=123 ORDER BY abc.def ASC";
        try {
            getWalker(statement);
            Tree parserTree = (Tree) walker.getTreeNodeStream().getTreeSource();
            printTree(parserTree, statement);


        } catch (Exception e) {
            fail("Cannot parse query: " + statement + " (" + e + ")");
        }

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        // System.out.println("extractWhereTreeTest():");
        String statement = "SELECT p1, p2, p3.t3 mycol FROM MyType AS MyAlias WHERE p1='abc' and p2=123 ORDER BY abc.def ASC";


        try {
            traverseStatementAndCatchExc(statement);
            Tree whereTree = walker.getWherePredicateTree(); // getWhereTree(parserTree);
            printTree(whereTree);
            LOG.info("Evaluate WHERE subtree: ...");
            evalWhereTree(whereTree);
        } catch (Exception e) {
            fail("Cannot parse query: " + statement + " (" + e + ")");

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    @Test
    public void whereTestContains() {
        String statement = "SELECT p1 FROM MyType WHERE CONTAINS('Beethoven')";
        checkTreeWhere(statement);
        Tree tree = findSearchExpression(statement);
        printSearchTree(tree, statement);
    }

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    @Test
    public void whereTestContains2() {
        String statement = "SELECT p1 FROM MyType WHERE CONTAINS('Beethoven OR \\'Johann Sebastian\\' Mozart -Cage AND Orff')";
        checkTreeWhere(statement);
        Tree tree = findSearchExpression(statement);
        printSearchTree(tree, statement);
    }

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