Package org.apache.ibatis.mapping

Examples of org.apache.ibatis.mapping.BoundSql

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      /**
       * 方法1：通过ＩＤ来区分是否需要分页．.*query.*
       * 方法2：传入的参数是否有page参数，如果有，则分页，
       */
    //  if (mappedStatement.getId().matches(pageSqlId)) { // 拦截需要分页的SQL
        BoundSql boundSql = delegate.getBoundSql();
        Object parameterObject = boundSql.getParameterObject();// 分页SQL<select>中parameterType属性对应的实体参数，即Mapper接口中执行分页方法的参数,该参数不得为空
        if (parameterObject == null) {
          //throw new NullPointerException("boundSql.getParameterObject() is null!");
          return ivk.proceed();
        } else {

          PageView pageView = null;
          if (parameterObject instanceof PageView) { // 参数就是Pages实体
            pageView = (PageView) parameterObject;
          } else if (parameterObject instanceof Map) {
            for (Entry entry : (Set<Entry>) ((Map) parameterObject)
                .entrySet()) {
              if (entry.getValue() instanceof PageView) {
                pageView = (PageView) entry.getValue();
                break;
              }
            }
          } else { // 参数为某个实体，该实体拥有Pages属性
            pageView = ReflectHelper.getValueByFieldType(
                parameterObject, PageView.class);
            if (pageView == null) {
              return ivk.proceed();
            }
          }

          String sql = boundSql.getSql();
          PreparedStatement countStmt = null;
          ResultSet rs = null;
          try {
            Connection connection = (Connection) ivk.getArgs()[0];
            String countSql = "select count(1) from (" + sql
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    }
  }

  public CacheKey createCacheKey(MappedStatement ms, Object parameterObject, RowBounds rowBounds) {
    if (closed) throw new ExecutorException("Executor was closed.");
    BoundSql boundSql = ms.getBoundSql(parameterObject);
    CacheKey cacheKey = new CacheKey();
    cacheKey.update(ms.getId());
    cacheKey.update(rowBounds.getOffset());
    cacheKey.update(rowBounds.getLimit());
    cacheKey.update(boundSql.getSql());
    List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
    if (parameterMappings.size() > 0 && parameterObject != null) {
      TypeHandlerRegistry typeHandlerRegistry = ms.getConfiguration().getTypeHandlerRegistry();
      if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
        cacheKey.update(parameterObject);
      } else {
        MetaObject metaObject = configuration.newMetaObject(parameterObject);
        for (ParameterMapping parameterMapping : parameterMappings) {
          String propertyName = parameterMapping.getProperty();
          if (metaObject.hasGetter(propertyName)) {
            cacheKey.update(metaObject.getValue(propertyName));
          } else if (boundSql.hasAdditionalParameter(propertyName)) {
            cacheKey.update(boundSql.getAdditionalParameter(propertyName));
          }
        }
      }
    }
    return cacheKey;
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    int offset = rowBounds.getOffset();
    int limit = rowBounds.getLimit();

    if (dialect.supportsLimit()
        && (offset != RowBounds.NO_ROW_OFFSET || limit != RowBounds.NO_ROW_LIMIT)) {
      BoundSql boundSql = ms.getBoundSql(parameter);
      String sql = boundSql.getSql().trim();
      if (dialect.supportsLimitOffset()) {
        sql = dialect.getLimitString(sql, offset, limit);
        offset = RowBounds.NO_ROW_OFFSET;
      } else {
        sql = dialect.getLimitString(sql, 0, limit);
      }
      limit = RowBounds.NO_ROW_LIMIT;

      queryArgs[ROWBOUNDS_INDEX] = new RowBounds(offset, limit);
      BoundSql newBoundSql = new BoundSql(ms.getConfiguration(), sql,
          boundSql.getParameterMappings(),
          boundSql.getParameterObject());
      MappedStatement newMs = copyFromMappedStatement(ms,
          new BoundSqlSqlSource(newBoundSql));
      queryArgs[MAPPED_STATEMENT_INDEX] = newMs;
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    DynamicContext context = new DynamicContext(configuration, parameterObject);
    rootSqlNode.apply(context);
    SqlSourceBuilder sqlSourceParser = new SqlSourceBuilder(configuration);
    Class parameterType = parameterObject == null ? Object.class : parameterObject.getClass();
    SqlSource sqlSource = sqlSourceParser.parse(context.getSql(), parameterType);
    BoundSql boundSql = sqlSource.getBoundSql(parameterObject);
    for (Map.Entry<String, Object> entry : context.getBindings().entrySet()) {
      boundSql.setAdditionalParameter(entry.getKey(), entry.getValue());
    }
    return boundSql;
  }
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    deferredLoads.add(new DeferredLoad(ms, resultObject, property, key));
  }

  public CacheKey createCacheKey(MappedStatement ms, Object parameterObject, RowBounds rowBounds) {
    if (closed) throw new ExecutorException("Executor was closed.");
    BoundSql boundSql = ms.getBoundSql(parameterObject);
    CacheKey cacheKey = new CacheKey();
    cacheKey.update(ms.getId());
    cacheKey.update(rowBounds.getOffset());
    cacheKey.update(rowBounds.getLimit());
    cacheKey.update(boundSql.getSql());
    List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
    if (parameterMappings.size() > 0 && parameterObject != null) {
      TypeHandlerRegistry typeHandlerRegistry = ms.getConfiguration().getTypeHandlerRegistry();
      if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
        cacheKey.update(parameterObject);
      } else {
        MetaObject metaObject = configuration.newMetaObject(parameterObject);
        for (ParameterMapping parameterMapping : parameterMappings) {
          String propertyName = parameterMapping.getProperty();
          if (metaObject.hasGetter(propertyName)) {
            cacheKey.update(metaObject.getValue(propertyName));
          } else if (boundSql.hasAdditionalParameter(propertyName)) {
            cacheKey.update(boundSql.getAdditionalParameter(propertyName));
          }
        }
      }
    }
    return cacheKey;
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  }

  private Statement prepareStatement(StatementHandler handler)
      throws SQLException {
    Statement stmt;
    BoundSql boundSql = handler.getBoundSql();
    String sql = boundSql.getSql();
    if (hasStatementFor(sql)) {
      stmt = getStatement(sql);
    } else {
      Connection connection = transaction.getConnection();
      stmt = handler.prepare(connection);
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  public int doUpdate(MappedStatement ms, Object parameterObject)
      throws SQLException {
    Configuration configuration = ms.getConfiguration();
    StatementHandler handler = configuration.newStatementHandler(this, ms, parameterObject, RowBounds.DEFAULT, null);
    BoundSql boundSql = handler.getBoundSql();
    String sql = boundSql.getSql();
    Statement stmt;
    if (currentSql != null && sql.hashCode() == currentSql.hashCode() && sql.length() == currentSql.length()) {
      int last = statementList.size() - 1;
      stmt = statementList.get(last);
    } else {
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    this.parameterMappings = parameterMappings;
    this.configuration = configuration;
  }

  public BoundSql getBoundSql(Object parameterObject) {
    return new BoundSql(configuration, sql, parameterMappings, parameterObject);
  }
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  public void deferLoad(MappedStatement ms, MetaObject resultObject, String property, CacheKey key) {
    deferredLoads.add(new DeferredLoad(ms, resultObject, property, key));
  }

  public CacheKey createCacheKey(MappedStatement ms, Object parameterObject, RowBounds rowBounds) {
    BoundSql boundSql = ms.getBoundSql(parameterObject);
    CacheKey cacheKey = new CacheKey();
    cacheKey.update(ms.getId());
    cacheKey.update(rowBounds.getOffset());
    cacheKey.update(rowBounds.getLimit());
    cacheKey.update(boundSql.getSql());
    List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
    if (parameterMappings.size() > 0 && parameterObject != null) {
      TypeHandlerRegistry typeHandlerRegistry = ms.getConfiguration().getTypeHandlerRegistry();
      if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
        cacheKey.update(parameterObject);
      } else {
        MetaObject metaObject = MetaObject.forObject(parameterObject);
        for (ParameterMapping parameterMapping : parameterMappings) {
          String propertyName = parameterMapping.getProperty();
          if (metaObject.hasGetter(propertyName)) {
            cacheKey.update(metaObject.getValue(propertyName));
          } else if (boundSql.hasAdditionalParameter(propertyName)) {
            cacheKey.update(boundSql.getAdditionalParameter(propertyName));
          }
        }
      }
    }
    return cacheKey;
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    DynamicContext context = new DynamicContext(parameterObject);
    rootSqlNode.apply(context);
    SqlSourceBuilder sqlSourceParser = new SqlSourceBuilder(configuration);
    Class parameterType = parameterObject == null ? Object.class : parameterObject.getClass();
    SqlSource sqlSource = sqlSourceParser.parse(context.getSql(), parameterType);
    BoundSql boundSql = sqlSource.getBoundSql(parameterObject);
    for (Map.Entry<String, Object> entry : context.getBindings().entrySet()) {
      boundSql.setAdditionalParameter(entry.getKey(), entry.getValue());
    }
    return boundSql;
  }
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