poolmanconnectionhandle.java

来自「Java Database connection pool」· Java 代码 · 共 200 行

/*
 *  PoolMan Java Object Pooling and Caching Library
 *  Copyright (C) 1999-2001 The Code Studio
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  The full license is located at the root of this distribution
 *  in the LICENSE file.
 */
package com.codestudio.sql;

import java.io.Serializable;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.Statement;

/**
 * Caller-side Connection object.
 */
public class PoolManConnectionHandle
        implements Connection, Serializable {

    private PoolManConnection pcon;

    public PoolManConnectionHandle(PoolManConnection c) {
        this.pcon = c;
    }

    void clearConnection() {
        this.pcon = null;
    }

    void assertConnectionExists()
            throws SQLException {

        if (this.pcon == null)
            throw new SQLException("Either you have already closed this Connection or it has timed out, " +
                                   "and in either case it has returned to its pool. You must re-acquire the Connection.");
    }

    public void close() throws SQLException {
        assertConnectionExists();
        pcon.sendCloseEvent();
    }

    public Connection getPhysicalConnection() throws SQLException {
        assertConnectionExists();
        return pcon.getPhysicalConnection();
    }

    public Connection getNativeConnection() throws SQLException {
        assertConnectionExists();
        return getPhysicalConnection();
    }

    public PoolManConnection getPoolManConnection() throws SQLException {
        assertConnectionExists();
        return pcon;
    }

    public Statement createStatement() throws SQLException {
        assertConnectionExists();
        return pcon.createStatement();
    }

    public PreparedStatement prepareStatement(String sql) throws SQLException {
        assertConnectionExists();
        return pcon.prepareStatement(sql);
    }

    public CallableStatement prepareCall(String sql) throws SQLException {
        assertConnectionExists();
        return pcon.prepareCall(sql);
    }

    public String nativeSQL(String sql) throws SQLException {
        assertConnectionExists();
        return pcon.nativeSQL(sql);
    }

    public void setAutoCommit(boolean autoCommit) throws SQLException {
        assertConnectionExists();
        pcon.setAutoCommit(autoCommit);
    }

    public boolean getAutoCommit() throws SQLException {
        assertConnectionExists();
        return pcon.getAutoCommit();
    }

    public void commit() throws SQLException {
        assertConnectionExists();
        pcon.commit();
    }

    public void rollback() throws SQLException {
        assertConnectionExists();
        this.pcon.rollback();
    }

    public boolean isClosed() throws SQLException {
        if (pcon != null)
            return false;
        return true;
    }

    public DatabaseMetaData getMetaData() throws SQLException {
        assertConnectionExists();
        return pcon.getMetaData();
    }

    public void setReadOnly(boolean readOnly) throws SQLException {
        assertConnectionExists();
        pcon.setReadOnly(readOnly);
    }

    public boolean isReadOnly() throws SQLException {
        assertConnectionExists();
        return pcon.isReadOnly();
    }

    public void setCatalog(String catalog) throws SQLException {
        assertConnectionExists();
        pcon.setCatalog(catalog);
    }

    public String getCatalog() throws SQLException {
        assertConnectionExists();
        return pcon.getCatalog();
    }

    public void setTransactionIsolation(int level) throws SQLException {
        assertConnectionExists();
        pcon.setTransactionIsolation(level);
    }

    public int getTransactionIsolation() throws SQLException {
        assertConnectionExists();
        return pcon.getTransactionIsolation();
    }

    public SQLWarning getWarnings() throws SQLException {
        assertConnectionExists();
        return pcon.getWarnings();
    }

    public void clearWarnings() throws SQLException {
        assertConnectionExists();
        pcon.clearWarnings();
    }


    public Statement createStatement(int resultSetType, int resultSetPconcurrency) throws SQLException {
        assertConnectionExists();
        return pcon.createStatement(resultSetType, resultSetPconcurrency);
    }

    public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetPconcurrency)
            throws SQLException {

        assertConnectionExists();
        return pcon.prepareStatement(sql, resultSetType, resultSetPconcurrency);
    }

    public CallableStatement prepareCall(String sql, int resultSetType, int resultSetPconcurrency)
            throws SQLException {
        assertConnectionExists();
        return pcon.prepareCall(sql, resultSetType, resultSetPconcurrency);
    }

    public java.util.Map getTypeMap() throws SQLException {
        assertConnectionExists();
        return pcon.getTypeMap();
    }

    public void setTypeMap(java.util.Map map) throws SQLException {
        assertConnectionExists();
        pcon.setTypeMap(map);
    }

    /* OBJECT METHODS */

    public String toString() {
        return "PoolManConnectionHandle-" + pcon.toString();
    }

}