cc.tooyoung.common.db.JdbcAccessor.java Source code

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Here is the source code for cc.tooyoung.common.db.JdbcAccessor.java

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package cc.tooyoung.common.db;
/*
 * Copyright 2002-2007 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import javax.sql.DataSource;

import org.springframework.beans.factory.InitializingBean;
import org.springframework.jdbc.support.SQLExceptionTranslator;

/**
 * Base class for {@link org.springframework.jdbc.core.JdbcTemplate} and
 * other JDBC-accessing DAO helpers, defining common properties such as
 * DataSource and exception translator.
 *
 * <p>Not intended to be used directly.
 * See {@link org.springframework.jdbc.core.JdbcTemplate}.
 *
 * @author Juergen Hoeller
 * @since 28.11.2003
 * @see org.springframework.jdbc.core.JdbcTemplate
 */
public abstract class JdbcAccessor implements InitializingBean {

    /** Logger available to subclasses */
    //protected final Log logger = LogFactory.getLog(getClass());

    private boolean lazyInit = true;

    /**
     * Set whether to lazily initialize the SQLExceptionTranslator for this accessor,
     * on first encounter of a SQLException. Default is "true"; can be switched to
     * "false" for initialization on startup.
     * <p>Early initialization just applies if <code>afterPropertiesSet()</code> is called.
     * @see #getExceptionTranslator()
     * @see #afterPropertiesSet()
     */
    public void setLazyInit(boolean lazyInit) {
        this.lazyInit = lazyInit;
    }

    /**
     * Return whether to lazily initialize the SQLExceptionTranslator for this accessor.
     * @see #getExceptionTranslator()
     */
    public boolean isLazyInit() {
        return this.lazyInit;
    }

    /**
     * Eagerly initialize the exception translator, if demanded,
     * creating a default one for the specified DataSource if none set.
     */
    public void afterPropertiesSet(DataSource dataSource) {
        if (dataSource == null) {
            throw new IllegalArgumentException("Property 'dataSource' is required");
        }
        if (!isLazyInit()) {
            getExceptionTranslator(dataSource);
        }
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        //throw new UnsupportedOperationException("Error: not support afterPropertiesSet()");
    }

    public abstract SQLExceptionTranslator getExceptionTranslator(DataSource dataSource);

}