systemdbdao.java

intra_mart是日本NDD公司开发的著名企业应用解决方案中间件。集成了J2ee服务器

/*
 * LoginGroupDBDAO.java
 *
 * Created on 2005/01/28, 16:09
 */

package jp.co.intra_mart.framework.base.data;

import java.sql.Connection;

/**
 * 僀儞僩儔儅乕僩偱愝掕偝傟偨DB傊傾僋僙僗偡傞DAO偱偡丅
 * 僔僗僥儉搊榐偝傟偰偄傞ID傪僉乕偲偟偰DB傊傾僋僙僗偡傞DAO傪嶌傞応崌丄偙偺僋儔僗傪extends偟傑偡丅
 *
 * @author INTRAMART
 * @version 1.0
 * @since 5.0
 */
public class SystemDBDAO implements DAO {

    /**
     * 愙懕忣曬
     */
    private String connect;

    /**
     * 僀儞僩儔儅乕僩梡偺DataConnector
     */
    private SystemDBConnector connector;

    /**
     * 僀儞僩儔儅乕僩偱愝掕偝傟偨DB傊偺僐僱僋僔儑儞
     */
    private Connection connection;

    /**
     * IntramartDBDAO傪怴婯偵惗惉偟傑偡丅
     */
    public SystemDBDAO() {
        this.connect = null;
        this.connector = null;
        this.connection = null;
    }

    /**
     * 僨乕僞儕僜乕僗偵愙懕偡傞帪偺忣曬傪愝掕偟傑偡丅
     *
     * @param connector 僨乕僞僐僱僋僞
     * @param resource 儕僜乕僗
     * @param key 僉乕
     * @param connect 愙懕忣曬
     * @throws DataConnectException 愙懕偵幐攕
     */
    public void setConnectInfo(
        DataConnector connector,
        String resource,
        String key,
        String connect)
        throws DataConnectException {
        this.connector = (SystemDBConnector)connector;
        this.connect = connect;
    }

    /**
     * 僀儞僩儔儅乕僩偱愝掕偝傟偰偄傞DB傊偺僐僱僋僔儑儞傪庢摼偟傑偡丅
     *
     * @return 僀儞僩儔儅乕僩偱愝掕偝傟偰偄傞DB傊偺僐僱僋僔儑儞
     * @throws DataConnectException 僨乕僞儀乕僗愙懕帪偵椺奜偑敪惗
     * @throws DataPropertyException 僨乕僞僾儘僷僥傿庢摼帪偵椺奜偑敪惗
     */
    public Connection getConnection()
        throws DataConnectException, DataPropertyException {
        if (this.connection == null) {
            this.connection = this.connector.getConnection(this.connect);
        }

        return this.connection;
    }
}