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.

        CoffeeScriptLexer lexer = new CoffeeScriptLexer(input);
        CommonTokenStream tokens = new CommonTokenStream(lexer);
        CoffeeScriptParser parser = new CoffeeScriptParser(tokens);
        CoffeeScriptParser.root_return res = parser.root();
        
        Tree tree = (Tree)res.getTree(); // The root node.
        print(tree);
    }

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  public static void print(Tree node, String indent) {
    System.out.println(indent + nodeString(node));
    int count = node.getChildCount();
    for (int i=0;i<count;i++) {
      Tree child = node.getChild(i);
      print(child, indent + "  ");
    }
  }

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    }


    // Execute a CLI Statement 
    public void executeCLIStatement(String statement)
    {
        Tree tree = CliCompiler.compileQuery(statement);


        try
        {
            switch (tree.getType())
            {
                case CliParser.NODE_EXIT:
                    cleanupAndExit();
                    break;
                case CliParser.NODE_THRIFT_GET:
                    executeGet(tree);
                    break;
                case CliParser.NODE_THRIFT_GET_WITH_CONDITIONS:
                    executeGetWithConditions(tree);
                    break;
                case CliParser.NODE_HELP:
                    printCmdHelp(tree, sessionState);
                    break;
                case CliParser.NODE_THRIFT_SET:
                    executeSet(tree);
                    break;
                case CliParser.NODE_THRIFT_DEL:
                    executeDelete(tree);
                    break;
                case CliParser.NODE_THRIFT_COUNT:
                    executeCount(tree);
                    break;
                case CliParser.NODE_ADD_KEYSPACE:
                    executeAddKeySpace(tree.getChild(0));
                    break;
                case CliParser.NODE_ADD_COLUMN_FAMILY:
                    executeAddColumnFamily(tree.getChild(0));
                    break;
                case CliParser.NODE_UPDATE_KEYSPACE:
                    executeUpdateKeySpace(tree.getChild(0));
                    break;
                case CliParser.NODE_UPDATE_COLUMN_FAMILY:
                    executeUpdateColumnFamily(tree.getChild(0));
                    break;
                case CliParser.NODE_DEL_COLUMN_FAMILY:
                    executeDelColumnFamily(tree);
                    break;
                case CliParser.NODE_DEL_KEYSPACE:
                    executeDelKeySpace(tree);
                    break;
                case CliParser.NODE_SHOW_CLUSTER_NAME:
                    executeShowClusterName();
                    break;
                case CliParser.NODE_SHOW_VERSION:
                    executeShowVersion();
                    break;
                case CliParser.NODE_SHOW_KEYSPACES:
                    executeShowKeySpaces();
                    break;
                case CliParser.NODE_DESCRIBE_TABLE:
                    executeDescribeKeySpace(tree);
                    break;
                case CliParser.NODE_DESCRIBE_CLUSTER:
                    executeDescribeCluster();
                    break;
                case CliParser.NODE_USE_TABLE:
                    executeUseKeySpace(tree);
                    break;
                case CliParser.NODE_CONNECT:
                    executeConnect(tree);
                    break;
                case CliParser.NODE_LIST:
                    executeList(tree);
                    break;
                case CliParser.NODE_TRUNCATE:
                    executeTruncate(tree.getChild(0).getText());
                    break;
                case CliParser.NODE_ASSUME:
                    executeAssumeStatement(tree);
                    break;
                case CliParser.NODE_CONSISTENCY_LEVEL:
                    executeConsistencyLevelStatement(tree);
                    break;
                case CliParser.NODE_NO_OP:
                    // comment lines come here; they are treated as no ops.
                    break;
                default:
                    sessionState.err.println("Invalid Statement (Type: " + tree.getType() + ")");
                    if (sessionState.batch)
                        System.exit(2);
                    break;
            }
        }

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            throws TException, InvalidRequestException, UnavailableException, TimedOutException
    {
        if (!CliMain.isConnected() || !hasKeySpace())
            return;


        Tree columnFamilySpec = statement.getChild(0);


        String key = CliCompiler.getKey(columnFamilySpec);
        String columnFamily = CliCompiler.getColumnFamily(columnFamilySpec, keyspacesMap.get(keySpace).cf_defs);
        int columnSpecCnt = CliCompiler.numColumnSpecifiers(columnFamilySpec);

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            throws TException, InvalidRequestException, UnavailableException, TimedOutException
    {
        if (!CliMain.isConnected() || !hasKeySpace())
            return;


        Tree columnFamilySpec = statement.getChild(0);


        String key = CliCompiler.getKey(columnFamilySpec);
        String columnFamily = CliCompiler.getColumnFamily(columnFamilySpec, keyspacesMap.get(keySpace).cf_defs);
        int columnSpecCnt = CliCompiler.numColumnSpecifiers(columnFamilySpec);

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            throws TException, NotFoundException, InvalidRequestException, UnavailableException, TimedOutException, IllegalAccessException, InstantiationException, ClassNotFoundException, NoSuchFieldException
    {
        if (!CliMain.isConnected() || !hasKeySpace())
            return;


        Tree columnFamilySpec = statement.getChild(0);
        String columnFamily = CliCompiler.getColumnFamily(columnFamilySpec, keyspacesMap.get(keySpace).cf_defs);
        ByteBuffer key = getKeyAsBytes(columnFamily, columnFamilySpec.getChild(1));
        int columnSpecCnt = CliCompiler.numColumnSpecifiers(columnFamilySpec);
        CfDef cfDef = getCfDef(columnFamily);
        boolean isSuper = cfDef.column_type.equals("Super");
        
        byte[] superColumnName = null;
        ByteBuffer columnName;


        Tree typeTree = null;
        Tree limitTree = null;


        int limit = 1000000;


        if (statement.getChildCount() >= 2)
        {
            if (statement.getChild(1).getType() == CliParser.CONVERT_TO_TYPE)
            {
                typeTree = statement.getChild(1).getChild(0);
                if (statement.getChildCount() == 3)
                    limitTree = statement.getChild(2).getChild(0);
            }
            else
            {
                limitTree = statement.getChild(1).getChild(0);
            }
        }


        if (limitTree != null)
        {
            limit = Integer.parseInt(limitTree.getText());


            if (limit == 0)
            {
                throw new IllegalArgumentException("LIMIT should be greater than zero.");
            }

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            return;


        IndexClause clause = new IndexClause();
        String columnFamily = CliCompiler.getColumnFamily(statement, keyspacesMap.get(keySpace).cf_defs);
        // ^(CONDITIONS ^(CONDITION $column $value) ...)
        Tree conditions = statement.getChild(1);
        
        // fetching column family definition
        CfDef columnFamilyDef = getCfDef(columnFamily);


        // fetching all columns
        SlicePredicate predicate = new SlicePredicate();
        SliceRange sliceRange = new SliceRange();
        sliceRange.setStart(new byte[0]).setFinish(new byte[0]);
        predicate.setSlice_range(sliceRange);


        for (int i = 0; i < conditions.getChildCount(); i++)
        {
            // ^(CONDITION operator $column $value)
            Tree condition = conditions.getChild(i);


            // =, >, >=, <, <=
            String operator = condition.getChild(0).getText();
            String columnNameString  = CliUtils.unescapeSQLString(condition.getChild(1).getText());
            // it could be a basic string or function call
            Tree valueTree = condition.getChild(2);


            try
            {
                ByteBuffer value;
                ByteBuffer columnName = columnNameAsBytes(columnNameString, columnFamily);


                if (valueTree.getType() == CliParser.FUNCTION_CALL)
                {
                    value = convertValueByFunction(valueTree, columnFamilyDef, columnName);
                }
                else
                {
                    String valueString = CliUtils.unescapeSQLString(valueTree.getText());
                    value = columnValueAsBytes(columnName, columnFamily, valueString);
                }


                // index operator from string
                IndexOperator idxOperator = CliUtils.getIndexOperator(operator);
                // adding new index expression into index clause
                clause.addToExpressions(new IndexExpression(columnName, idxOperator, value));
            }
            catch (Exception e)
            {
                throw new RuntimeException(e.getMessage());
            }
        }


        List<KeySlice> slices;
        clause.setStart_key(new byte[] {});


        // when we have ^(NODE_LIMIT Integer)
        if (statement.getChildCount() == 3)
        {
            Tree limitNode = statement.getChild(2);
            int limitValue = Integer.parseInt(limitNode.getChild(0).getText());


            if (limitValue == 0)
            {
                throw new IllegalArgumentException("LIMIT should be greater than zero.");
            }

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    {
        if (!CliMain.isConnected() || !hasKeySpace())
            return;
        
        // ^(NODE_COLUMN_ACCESS <cf> <key> <column>)
        Tree columnFamilySpec = statement.getChild(0);
        Tree keyTree = columnFamilySpec.getChild(1); // could be a function or regular text


        String columnFamily = CliCompiler.getColumnFamily(columnFamilySpec, keyspacesMap.get(keySpace).cf_defs);
        CfDef cfDef = getCfDef(columnFamily);
        int columnSpecCnt = CliCompiler.numColumnSpecifiers(columnFamilySpec);
        String value = CliUtils.unescapeSQLString(statement.getChild(1).getText());
        Tree valueTree = statement.getChild(1);


        byte[] superColumnName = null;
        ByteBuffer columnName;


        // table.cf['key']
        if (columnSpecCnt == 0)
        {
            sessionState.err.println("No column name specified, (type 'help' or '?' for help on syntax).");
            return;
        }
        // table.cf['key']['column'] = 'value'
        else if (columnSpecCnt == 1)
        {
            // get the column name
            if (cfDef.column_type.equals("Super"))
            {
                sessionState.out.println("Column family " + columnFamily + " may only contain SuperColumns");
                return;
            }
            columnName = getColumnName(columnFamily, columnFamilySpec.getChild(2));
        }
        // table.cf['key']['super_column']['column'] = 'value'
        else
        {
            assert (columnSpecCnt == 2) : "serious parsing error (this is a bug).";


            superColumnName = getColumnName(columnFamily, columnFamilySpec.getChild(2)).array();
            columnName = getSubColumnName(columnFamily, columnFamilySpec.getChild(3));
        }


        ByteBuffer columnValueInBytes;


        switch (valueTree.getType())
        {
        case CliParser.FUNCTION_CALL:
            columnValueInBytes = convertValueByFunction(valueTree, cfDef, columnName, true);
            break;
        default:

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                break;
            case GC_GRACE:
                cfDef.setGc_grace_seconds(Integer.parseInt(mValue));
                break;
            case COLUMN_METADATA:
                Tree arrayOfMetaAttributes = statement.getChild(i + 1);
                if (!arrayOfMetaAttributes.getText().equals("ARRAY"))
                    throw new RuntimeException("'column_metadata' format - [{ k:v, k:v, ..}, { ... }, ...]");
                cfDef.setColumn_metadata(getCFColumnMetaFromTree(cfDef, arrayOfMetaAttributes));
                break;
            case MEMTABLE_OPERATIONS:
                cfDef.setMemtable_operations_in_millions(Double.parseDouble(mValue));

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        int limitCount = Integer.MAX_VALUE; // will reset to default later if it's not specified


        // optional arguments: key range and limit
        for (int i = 1; i < statement.getChildCount(); i++)
        {
            Tree child = statement.getChild(i);
            if (child.getType() == CliParser.NODE_KEY_RANGE)
            {
                if (child.getChildCount() > 0)
                {
                    rawStartKey = CliUtils.unescapeSQLString(child.getChild(0).getText());
                    if (child.getChildCount() > 1)
                        rawEndKey = CliUtils.unescapeSQLString(child.getChild(1).getText());
                }
            }
            else
            {
                if (child.getChildCount() != 1)
                {
                    sessionState.out.println("Invalid limit clause");
                    return;
                }
                limitCount = Integer.parseInt(child.getChild(0).getText());
                if (limitCount <= 0)
                {
                    sessionState.out.println("Invalid limit " + limitCount);
                    return;
                }

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