org.apache.ibatis.reflection.wrapper.DefaultObjectWrapperFactory Java Examples

@Override
public Object intercept(Invocation invocation) throws Throwable {
    // 目标对象转换
    ResultSetHandler resultSetHandler = (ResultSetHandler) invocation.getTarget();

    // 获取MappedStatement,Configuration对象
    MetaObject metaObject =
            MetaObject.forObject(resultSetHandler, new DefaultObjectFactory(), new DefaultObjectWrapperFactory(), new DefaultReflectorFactory());
    MappedStatement mappedStatement = (MappedStatement) metaObject.getValue("mappedStatement");
    String statement = mappedStatement.getId();
    if (!isPageSql(statement,metaObject.getValue("boundSql.parameterObject"))) {
        return invocation.proceed();
    }

    // 获取分页参数
    QPageQuery pageQuery = (QPageQuery) metaObject.getValue("boundSql.parameterObject");

    List<PageResult> result = new ArrayList<PageResult>(1);
    PageResult page = new PageResult();
    page.setPagination(pageQuery.getPagination());
    page.setResult((List) invocation.proceed());
    result.add(page);

    return result;
}
 

@Override
public Object intercept(Invocation invocation) throws Throwable {
	StatementHandler statementHandler = (StatementHandler) invocation.getTarget();
	BoundSql boundSql = statementHandler.getBoundSql();
	MetaObject metaStatementHandler = MetaObject.forObject(statementHandler, new DefaultObjectFactory(), new DefaultObjectWrapperFactory());
	RowBounds rowBounds = (RowBounds) metaStatementHandler.getValue("delegate.rowBounds");
	if ((rowBounds != null) && (rowBounds != RowBounds.DEFAULT)) {
           Configuration configuration = (Configuration) metaStatementHandler.getValue("delegate.configuration");
           Dialect dialect = DialectParser.parse(configuration);
           String sql = (String) metaStatementHandler.getValue("delegate.boundSql.sql");
           sql = dialect.addLimitString(sql, rowBounds.getOffset(), rowBounds.getLimit());

           metaStatementHandler.setValue("delegate.boundSql.sql", sql);
           metaStatementHandler.setValue("delegate.rowBounds.offset", RowBounds.NO_ROW_OFFSET);
           metaStatementHandler.setValue("delegate.rowBounds.limit", RowBounds.NO_ROW_LIMIT);
	}

	log.debug("SQL : " + boundSql.getSql());
	return invocation.proceed();
}
 

@Override
public Object intercept(Invocation invocation) throws Throwable {
       List<Sort> sortList = getSortList();
       if (sortList == null || sortList.size() == 0) {
           return invocation.proceed();
       }

       Executor executor = (Executor) invocation.getTarget();
       Object[] args = invocation.getArgs();
       MappedStatement ms = (MappedStatement) args[0];
       Object parameter = args[1];
       RowBounds rowBounds = (RowBounds) args[2];
       ResultHandler resultHandler = (ResultHandler) args[3];

       // 计算修改BoundSql
       BoundSql boundSql = ms.getBoundSql(parameter);
       MetaObject boundSqlHandler = MetaObject.forObject(boundSql, new DefaultObjectFactory(), new DefaultObjectWrapperFactory());
       Dialect dialect = DialectParser.parse(ms.getConfiguration());
       String sql = (String) boundSqlHandler.getValue("sql");
       sql = dialect.addSortString(sql, sortList);
       boundSqlHandler.setValue("sql", sql);

       // 继续执行原来的代码
       CacheKey key = executor.createCacheKey(ms, parameter, rowBounds, boundSql);
       return executor.query(ms, parameter, rowBounds, resultHandler, key, boundSql);
}
 

/**
 * 包装sql后，重置到invocation中
 * @param invocation
 * @param sql
 * @throws SQLException
 */
private void resetSql2Invocation(Invocation invocation, String sql) throws SQLException {
    final Object[] args = invocation.getArgs();
    MappedStatement statement = (MappedStatement) args[0];
    Object parameterObject = args[1];
    BoundSql boundSql = statement.getBoundSql(parameterObject);
    MappedStatement newStatement = newMappedStatement(statement, new BoundSqlSqlSource(boundSql));
    MetaObject msObject =  MetaObject.forObject(newStatement, new DefaultObjectFactory(), new DefaultObjectWrapperFactory(),new DefaultReflectorFactory());
    msObject.setValue("sqlSource.boundSql.sql", sql);
    args[0] = newStatement;
}
 

/**
 * コンストラクタです。
 * MyBatisの{@link StatementHandler}の解析に失敗した場合に{@link InternalException}をスローします。
 * @param statementHandler {@link StatementHandler}
 */
public QueryInformation(StatementHandler statementHandler) {
    try {
        this.typeHandlerRegistry = new TypeHandlerRegistry();
        this.statementHandler = getConcreteStatementHandler(statementHandler);
        this.mappedStatement = getMappedStatement(this.statementHandler);
        this.boundSql = this.statementHandler.getBoundSql();
        this.parameterObject = this.boundSql.getParameterObject();
        this.parameterMappingList = boundSql.getParameterMappings();
        this.sqlCommandType = mappedStatement.getSqlCommandType();
        this.statementType = mappedStatement.getStatementType();
        this.metaObject = parameterObject == null ? null : MetaObject.forObject(parameterObject, new DefaultObjectFactory(), new DefaultObjectWrapperFactory());

        switch (statementType) {
            case STATEMENT:
                this.query = boundSql.getSql();
                break;
            case PREPARED:
                this.preparedQuery = boundSql.getSql();
                break;
            case CALLABLE:
                this.callableQuery = boundSql.getSql();
                break;
            default:
                throw new InternalException(QueryInformation.class, "");
        }
    } catch (Exception e) {
        throw new InternalException(QueryInformation.class, "E-JDBC-MYBATIS#0002", e);
    }
}
 

@Override
public Object intercept(Invocation invocation) throws Throwable {
    StatementHandler handler = (StatementHandler) invocation.getTarget();

    // 获取MappedStatement,Configuration对象
    MetaObject metaObject =
            MetaObject.forObject(handler, new DefaultObjectFactory(), new DefaultObjectWrapperFactory(), new DefaultReflectorFactory());
    MappedStatement mappedStatement = (MappedStatement) metaObject.getValue("delegate.mappedStatement");
    String statement = mappedStatement.getId();
    if (!isPageSql(statement,metaObject.getValue("boundSql.parameterObject"))) {
        return invocation.proceed();
    }

    Configuration configuration = (Configuration) metaObject.getValue("delegate.configuration");
    Executor executor = (Executor) metaObject.getValue("delegate.executor");

    // 获取分页参数
    BoundSql boundSql = handler.getBoundSql();
    QPageQuery pageQuery = (QPageQuery) boundSql.getParameterObject();
    String countStatement = buildCountStatement(statement);
    List<Integer> counts = executor.query(configuration.
            getMappedStatement(countStatement), pageQuery, RowBounds.DEFAULT, null);

    int count = 0;
    if (counts != null && !counts.isEmpty()) {
        count = counts.get(0) == null ? 0 : counts.get(0);
    }

    if (pageQuery.getPagination() == null) {
        pageQuery.setPagination(new Pagination());
    }
    pageQuery.getPagination().setTotalRecord(count);

    String sql = boundSql.getSql();
    if (logger.isDebugEnabled()) {
        logger.debug("raw SQL : " + sql);
    }

    if (sql == null || sql.isEmpty() || sql.contains(" limit ")) {
        return invocation.proceed();
    }

    String originalSql = (String) metaObject.getValue("delegate.boundSql.sql");
    metaObject.setValue("delegate.boundSql.sql",
            getLimitString(originalSql, pageQuery.getPagination().getStart(),
                    pageQuery.getPagination().getSize()));
    metaObject.setValue("delegate.rowBounds.offset", RowBounds.NO_ROW_OFFSET);
    metaObject.setValue("delegate.rowBounds.limit", RowBounds.NO_ROW_LIMIT);

    if (logger.isDebugEnabled()) {
        logger.debug("pagination SQL : " + sql);
    }
    return invocation.proceed();
}