include/Info.h

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/***************************************************************************
 *   Copyright (C) 2007 by www.databasecache.com                           *
 *   Contact: praba_tuty@databasecache.com                                 *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
  ***************************************************************************/
#ifndef INFO_H
#define INFO_H
#include<ErrorType.h>
#include<DataType.h>
#include<Field.h>


class FieldNameNode;

class FieldNameList
{
    FieldNameNode *head;
    FieldNameNode *iter;
    public:
    FieldNameList() { head = iter = NULL; }
    ~FieldNameList() { } //TODO::Remove all elements from the list
    char *nextFieldName();
    void resetIter(){ iter = head; }
    int size();

    DbRetVal append(const char *name);

    DbRetVal remove(const char *name);
    DbRetVal removeAll();
};

class FieldList;
class FieldIterator;


class TableDef
{
    private:
    FieldList fldList;
    int fldCount;

    public:
    TableDef() { fldCount = 0; }
    ~TableDef();
    void reset();
    int addField(const char *name,  DataType type = typeUnknown, size_t
                 length = 0, const void *defaultValue = 0,
                 bool notNull = false);

    int dropField(const char *name);

    int getFieldCount();

    size_t getTupleSize();

    //Internal method used to iterate and get information stored
    //in this table definition.
    FieldIterator getFieldIterator(){ return fldList.getIterator(); }

};

class FieldInfo
{
    public:
    char fldName[IDENTIFIER_LENGTH];
    DataType type;
    size_t length;
    int offset;
    char defaultValueBuf[DEFAULT_VALUE_BUF_LENGTH];
    bool isNull;
    bool isPrimary;
    bool isDefault;
};



enum IndexType
{
    hashIndex = 0, 
    treeIndex      
};

class IndexInitInfo
{
    public:
    char tableName[IDENTIFIER_LENGTH]; 
    FieldNameList list;               
    IndexType indType;                
    bool isUnique;                    
    bool isPrimary;                   
    IndexInitInfo() {  indType = hashIndex;  isUnique = false; isPrimary= false;}
    ~IndexInitInfo() {list.removeAll();}
};

class HashIndexInitInfo : public IndexInitInfo
{
    public:
    int bucketSize; 
    HashIndexInitInfo() { bucketSize = 1009; }
};
#endif

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