/**
 * SqlJetMapTable.java
 * Copyright (C) 2009-2013 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.map;

import org.tmatesoft.sqljet.core.SqlJetException;
import org.tmatesoft.sqljet.core.internal.ISqlJetBtree;
import org.tmatesoft.sqljet.core.map.ISqlJetMapTable;
import org.tmatesoft.sqljet.core.map.ISqlJetMapTableCursor;
import org.tmatesoft.sqljet.core.map.ISqlJetMapTransaction;
import org.tmatesoft.sqljet.core.map.SqlJetMapDb;
import org.tmatesoft.sqljet.core.table.engine.ISqlJetEngineSynchronized;
import org.tmatesoft.sqljet.core.table.engine.SqlJetEngine;

/**
 * @author TMate Software Ltd.
 * @author Sergey Scherbina (sergey.scherbina@gmail.com)
 * 
 */
public class SqlJetMapTable implements ISqlJetMapTable {

    private final SqlJetMapDb mapDb;
    private final ISqlJetBtree btree;
    private final SqlJetMapDef mapDef;
    private boolean writable;

    /**
     * @param mapDb
     * @param btree
     * @param mapDef
     * @param writable
     */
    public SqlJetMapTable(final SqlJetMapDb mapDb, final ISqlJetBtree btree, final SqlJetMapDef mapDef, boolean writable) {
        this.mapDb = mapDb;
        this.btree = btree;
        this.mapDef = mapDef;
        this.writable = writable;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.tmatesoft.sqljet.core.map.ISqlJetMapTable#open()
     */
    public ISqlJetMapTableCursor getCursor() throws SqlJetException {
        return (ISqlJetMapTableCursor) mapDb.runSynchronized(new ISqlJetEngineSynchronized() {
            public Object runSynchronized(SqlJetEngine engine) throws SqlJetException {
                return new SqlJetMapTableCursor(mapDb, btree, mapDef, writable);
            }
        });
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.tmatesoft.sqljet.core.map.ISqlJetMapTable#put(long,
     * java.lang.Object[])
     */
    public long put(final long key, final Object... values) throws SqlJetException {
        return (Long) mapDb.runWriteTransaction(new ISqlJetMapTransaction() {
            public Object run(SqlJetMapDb mapDb) throws SqlJetException {
                final ISqlJetMapTableCursor cursor = getCursor();
                try {
                    return cursor.put(key, values);
                } finally {
                    cursor.close();
                }
            }
        });
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.tmatesoft.sqljet.core.map.ISqlJetMapTable#get(long)
     */
    public Object[] get(final long key) throws SqlJetException {
        return (Object[]) mapDb.runReadTransaction(new ISqlJetMapTransaction() {
            public Object run(SqlJetMapDb mapDb) throws SqlJetException {
                final ISqlJetMapTableCursor cursor = getCursor();
                try {
                    if (cursor.goToKey(key)) {
                        return cursor.getValue();
                    } else {
                        return null;
                    }
                } finally {
                    cursor.close();
                }
            }
        });
    }

}