/**
* SqlJetBtreeSchemaTable.java
* Copyright (C) 2009-2010 TMate Software Ltd
*
* 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; version 2 of the License.
*
* 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.
*
* For information on how to redistribute this software under
* the terms of a license other than GNU General Public License
* contact TMate Software at support@sqljet.com
*/
package org.tmatesoft.sqljet.core.internal.table;
import org.tmatesoft.sqljet.core.SqlJetException;
import org.tmatesoft.sqljet.core.internal.ISqlJetBtree;
import org.tmatesoft.sqljet.core.internal.ISqlJetDbHandle;
import org.tmatesoft.sqljet.core.internal.ISqlJetMemoryPointer;
import org.tmatesoft.sqljet.core.internal.vdbe.SqlJetBtreeRecord;
/**
* @author TMate Software Ltd.
* @author Sergey Scherbina (sergey.scherbina@gmail.com)
*
*/
public class SqlJetBtreeSchemaTable extends SqlJetBtreeTable implements ISqlJetBtreeSchemaTable {
/**
* @param btree
* @param rootPage
* @param write
* @param index
* @throws SqlJetException
*/
public SqlJetBtreeSchemaTable(ISqlJetBtree btree, boolean write) throws SqlJetException {
super(btree, ISqlJetDbHandle.MASTER_ROOT, write, false);
}
/*
* (non-Javadoc)
*
* @see
* org.tmatesoft.sqljet.core.internal.table.ISqlJetBtreeSchemaTable#getTypeField
* ()
*/
public String getTypeField() throws SqlJetException {
return getString(TYPE_FIELD);
}
/*
* (non-Javadoc)
*
* @see
* org.tmatesoft.sqljet.core.internal.table.ISqlJetBtreeSchemaTable#getNameField
* ()
*/
public String getNameField() throws SqlJetException {
return getString(NAME_FIELD);
}
/*
* (non-Javadoc)
*
* @seeorg.tmatesoft.sqljet.core.internal.table.ISqlJetBtreeSchemaTable#
* getTableField()
*/
public String getTableField() throws SqlJetException {
return getString(TABLE_FIELD);
}
/*
* (non-Javadoc)
*
* @see
* org.tmatesoft.sqljet.core.internal.table.ISqlJetBtreeSchemaTable#getPageField
* ()
*/
public int getPageField() throws SqlJetException {
return (int) getInteger(PAGE_FIELD);
}
/*
* (non-Javadoc)
*
* @see
* org.tmatesoft.sqljet.core.internal.table.ISqlJetBtreeSchemaTable#getSqlField
* ()
*/
public String getSqlField() throws SqlJetException {
return getString(SQL_FIELD);
}
private void doInsertRecord(long rowId, String typeField, String nameField, String tableField, int pageField,
String sqlField) throws SqlJetException {
final ISqlJetBtreeRecord record = SqlJetBtreeRecord.getRecord(getEncoding(), typeField, nameField, tableField,
pageField, sqlField);
final ISqlJetMemoryPointer pData = record.getRawRecord();
insert(null, rowId, pData, pData.remaining(), 0, false);
}
/*
* (non-Javadoc)
*
* @see
* org.tmatesoft.sqljet.core.internal.table.ISqlJetBtreeSchemaTable#insertRecord
* (java.lang.String, java.lang.String, java.lang.String, long,
* java.lang.String)
*/
public long insertRecord(String typeField, String nameField, String tableField, int pageField, String sqlField)
throws SqlJetException {
final long rowId = newRowId();
doInsertRecord(rowId, typeField, nameField, tableField, pageField, sqlField);
return rowId;
}
/*
* (non-Javadoc)
*
* @see
* org.tmatesoft.sqljet.core.internal.table.ISqlJetBtreeSchemaTable#updateRecord
* (long, java.lang.String, java.lang.String, java.lang.String, int,
* java.lang.String)
*/
public void updateRecord(long rowId, String typeField, String nameField, String tableField, int pageField,
String sqlField) throws SqlJetException {
doInsertRecord(rowId, typeField, nameField, tableField, pageField, sqlField);
}
/*
* (non-Javadoc)
*
* @see
* org.tmatesoft.sqljet.core.internal.table.ISqlJetBtreeSchemaTable#goToRow
* (long)
*/
public boolean goToRow(long rowId) throws SqlJetException {
if (getRowId() == rowId)
return true;
final int moveTo = getCursor().moveTo(null, rowId, false);
if (moveTo < 0) {
next();
}
return getRowId() == rowId;
}
/*
* (non-Javadoc)
*
* @see
* org.tmatesoft.sqljet.core.internal.table.ISqlJetBtreeSchemaTable#getRowId
* ()
*/
public long getRowId() throws SqlJetException {
return getCursor().getKeySize();
}
}