org.apache.ibatis.mapping.ResultMapping Java Examples

The following examples show how to use org.apache.ibatis.mapping.ResultMapping. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example #1

Source File: XMLMapperBuilder.java From mybaties with Apache License 2.0

7 votes

private String processNestedResultMappings(XNode context, List<ResultMapping> resultMappings) throws Exception {
	  //处理association|collection|case
    if ("association".equals(context.getName())
        || "collection".equals(context.getName())
        || "case".equals(context.getName())) {
    	
//    	<resultMap id="blogResult" type="Blog">
//    	  <association property="author" column="author_id" javaType="Author" select="selectAuthor"/>
//    	</resultMap>
//如果不是嵌套查询
      if (context.getStringAttribute("select") == null) {
    	//则递归调用5.1 resultMapElement
        ResultMap resultMap = resultMapElement(context, resultMappings);
        return resultMap.getId();
      }
    }
    return null;
  }

Example #2

Source File: DefaultResultSetHandler.java From mybatis with Apache License 2.0

6 votes

private void createRowKeyForMappedProperties(ResultMap resultMap, ResultSetWrapper rsw, CacheKey cacheKey, List<ResultMapping> resultMappings, String columnPrefix) throws SQLException {
  for (ResultMapping resultMapping : resultMappings) {
    if (resultMapping.getNestedResultMapId() != null && resultMapping.getResultSet() == null) {
      // Issue #392
      final ResultMap nestedResultMap = configuration.getResultMap(resultMapping.getNestedResultMapId());
      createRowKeyForMappedProperties(nestedResultMap, rsw, cacheKey, nestedResultMap.getConstructorResultMappings(),
          prependPrefix(resultMapping.getColumnPrefix(), columnPrefix));
    } else if (resultMapping.getNestedQueryId() == null) {
      final String column = prependPrefix(resultMapping.getColumn(), columnPrefix);
      final TypeHandler<?> th = resultMapping.getTypeHandler();
      List<String> mappedColumnNames = rsw.getMappedColumnNames(resultMap, columnPrefix);
      // Issue #114
      if (column != null && mappedColumnNames.contains(column.toUpperCase(Locale.ENGLISH))) {
        final Object value = th.getResult(rsw.getResultSet(), column);
        if (value != null) {
          cacheKey.update(column);
          cacheKey.update(value);
        }
      }
    }
  }
}

Example #3

Source File: XMLMapperBuilder.java From mybaties with Apache License 2.0

6 votes

private Discriminator processDiscriminatorElement(XNode context, Class<?> resultType, List<ResultMapping> resultMappings) throws Exception {
  String column = context.getStringAttribute("column");
  String javaType = context.getStringAttribute("javaType");
  String jdbcType = context.getStringAttribute("jdbcType");
  String typeHandler = context.getStringAttribute("typeHandler");
  Class<?> javaTypeClass = resolveClass(javaType);
  @SuppressWarnings("unchecked")
  Class<? extends TypeHandler<?>> typeHandlerClass = (Class<? extends TypeHandler<?>>) resolveClass(typeHandler);
  JdbcType jdbcTypeEnum = resolveJdbcType(jdbcType);
  Map<String, String> discriminatorMap = new HashMap<String, String>();
  for (XNode caseChild : context.getChildren()) {
    String value = caseChild.getStringAttribute("value");
    String resultMap = caseChild.getStringAttribute("resultMap", processNestedResultMappings(caseChild, resultMappings));
    discriminatorMap.put(value, resultMap);
  }
  return builderAssistant.buildDiscriminator(resultType, column, javaTypeClass, jdbcTypeEnum, typeHandlerClass, discriminatorMap);
}

Example #4

Source File: XMLMapperBuilder.java From mybaties with Apache License 2.0

6 votes

private ResultMapping buildResultMappingFromContext(XNode context, Class<?> resultType, List<ResultFlag> flags) throws Exception {
//<id property="id" column="author_id"/>
//<result property="username" column="author_username"/>
   String property = context.getStringAttribute("property");
   String column = context.getStringAttribute("column");
   String javaType = context.getStringAttribute("javaType");
   String jdbcType = context.getStringAttribute("jdbcType");
   String nestedSelect = context.getStringAttribute("select");
   //处理嵌套的result map
   String nestedResultMap = context.getStringAttribute("resultMap",
       processNestedResultMappings(context, Collections.<ResultMapping> emptyList()));
   String notNullColumn = context.getStringAttribute("notNullColumn");
   String columnPrefix = context.getStringAttribute("columnPrefix");
   String typeHandler = context.getStringAttribute("typeHandler");
   String resulSet = context.getStringAttribute("resultSet");
   String foreignColumn = context.getStringAttribute("foreignColumn");
   boolean lazy = "lazy".equals(context.getStringAttribute("fetchType", configuration.isLazyLoadingEnabled() ? "lazy" : "eager"));
   Class<?> javaTypeClass = resolveClass(javaType);
   @SuppressWarnings("unchecked")
   Class<? extends TypeHandler<?>> typeHandlerClass = (Class<? extends TypeHandler<?>>) resolveClass(typeHandler);
   JdbcType jdbcTypeEnum = resolveJdbcType(jdbcType);
   //又去调builderAssistant.buildResultMapping
   return builderAssistant.buildResultMapping(resultType, property, column, javaTypeClass, jdbcTypeEnum, nestedSelect, nestedResultMap, notNullColumn, columnPrefix, typeHandlerClass, flags, resulSet, foreignColumn, lazy);
 }

Example #5

Source File: DefaultResultSetHandler.java From mybatis with Apache License 2.0

6 votes

private Object createResultObject(ResultSetWrapper rsw, ResultMap resultMap, ResultLoaderMap lazyLoader, String columnPrefix) throws SQLException {
  final List<Class<?>> constructorArgTypes = new ArrayList<Class<?>>();
  final List<Object> constructorArgs = new ArrayList<Object>();
  final Object resultObject = createResultObject(rsw, resultMap, constructorArgTypes, constructorArgs, columnPrefix);
  if (resultObject != null && !typeHandlerRegistry.hasTypeHandler(resultMap.getType())) {
    final List<ResultMapping> propertyMappings = resultMap.getPropertyResultMappings();
    for (ResultMapping propertyMapping : propertyMappings) {
      // issue gcode #109 && issue #149
      if (propertyMapping.getNestedQueryId() != null && propertyMapping.isLazy()) {
        //TODO 使用代理(cglib/javaassist)
        return configuration.getProxyFactory().createProxy(resultObject, lazyLoader, configuration, objectFactory, constructorArgTypes, constructorArgs);
      }
    }
  }
  return resultObject;
}

Example #6

Source File: DefaultResultSetHandler.java From mybatis with Apache License 2.0

6 votes

private void handleRowValuesForNestedResultMap(ResultSetWrapper rsw, ResultMap resultMap, ResultHandler resultHandler, RowBounds rowBounds, ResultMapping parentMapping) throws SQLException {
  final DefaultResultContext resultContext = new DefaultResultContext();
  skipRows(rsw.getResultSet(), rowBounds);
  Object rowValue = null;
  while (shouldProcessMoreRows(resultContext, rowBounds) && rsw.getResultSet().next()) {
    final ResultMap discriminatedResultMap = resolveDiscriminatedResultMap(rsw.getResultSet(), resultMap, null);
    final CacheKey rowKey = createRowKey(discriminatedResultMap, rsw, null);
    Object partialObject = nestedResultObjects.get(rowKey);
    // issue #577 && #542
    if (mappedStatement.isResultOrdered()) {
      if (partialObject == null && rowValue != null) {
        nestedResultObjects.clear();
        storeObject(resultHandler, resultContext, rowValue, parentMapping, rsw.getResultSet());
      }
      rowValue = getRowValue(rsw, discriminatedResultMap, rowKey, rowKey, null, partialObject);
    } else {
      rowValue = getRowValue(rsw, discriminatedResultMap, rowKey, rowKey, null, partialObject);
      if (partialObject == null) {
        storeObject(resultHandler, resultContext, rowValue, parentMapping, rsw.getResultSet());
      }
    }
  }
  if (rowValue != null && mappedStatement.isResultOrdered() && shouldProcessMoreRows(resultContext, rowBounds)) {
    storeObject(resultHandler, resultContext, rowValue, parentMapping, rsw.getResultSet());
  }
}

Example #7

Source File: MapperAnnotationBuilder.java From mybaties with Apache License 2.0

6 votes

private void applyConstructorArgs(Arg[] args, Class<?> resultType, List<ResultMapping> resultMappings) {
  for (Arg arg : args) {
    List<ResultFlag> flags = new ArrayList<ResultFlag>();
    flags.add(ResultFlag.CONSTRUCTOR);
    if (arg.id()) {
      flags.add(ResultFlag.ID);
    }
    ResultMapping resultMapping = assistant.buildResultMapping(
        resultType,
        null,
        nullOrEmpty(arg.column()),
        arg.javaType() == void.class ? null : arg.javaType(),
        arg.jdbcType() == JdbcType.UNDEFINED ? null : arg.jdbcType(),
        nullOrEmpty(arg.select()),
        nullOrEmpty(arg.resultMap()),
        null,
        null,
        arg.typeHandler() == UnknownTypeHandler.class ? null : arg.typeHandler(),
        flags,
        null,
        null,
        false);
    resultMappings.add(resultMapping);
  }
}

Example #8

Source File: DefaultResultSetHandler.java From mybatis with Apache License 2.0

6 votes

private Object createParameterizedResultObject(ResultSetWrapper rsw, Class<?> resultType, List<ResultMapping> constructorMappings,
    List<Class<?>> constructorArgTypes, List<Object> constructorArgs, String columnPrefix) throws SQLException {
  boolean foundValues = false;
  for (ResultMapping constructorMapping : constructorMappings) {
    final Class<?> parameterType = constructorMapping.getJavaType();
    final String column = constructorMapping.getColumn();
    final Object value;
    if (constructorMapping.getNestedQueryId() != null) {
      value = getNestedQueryConstructorValue(rsw.getResultSet(), constructorMapping, columnPrefix);
    } else if (constructorMapping.getNestedResultMapId() != null) {
      final ResultMap resultMap = configuration.getResultMap(constructorMapping.getNestedResultMapId());
      value = getRowValue(rsw, resultMap);
    } else {
      final TypeHandler<?> typeHandler = constructorMapping.getTypeHandler();
      value = typeHandler.getResult(rsw.getResultSet(), prependPrefix(column, columnPrefix));
    }
    constructorArgTypes.add(parameterType);
    constructorArgs.add(value);
    foundValues = value != null || foundValues;
  }
  return foundValues ? objectFactory.create(resultType, constructorArgTypes, constructorArgs) : null;
}

Example #9

Source File: ExecutorTestHelper.java From mybatis with Apache License 2.0

6 votes

public static MappedStatement createSelectAuthorWithIDof99MappedStatement(final Configuration config) {
  final TypeHandlerRegistry registry = config.getTypeHandlerRegistry();
  MappedStatement ms = new MappedStatement.Builder(config, "selectAuthor", new StaticSqlSource(config,"SELECT * FROM author WHERE id = 99"), SqlCommandType.SELECT)
      .statementType(StatementType.STATEMENT)
      .parameterMap(new ParameterMap.Builder(config, "defaultParameterMap", Author.class, new ArrayList<ParameterMapping>()).build())
      .resultMaps(new ArrayList<ResultMap>() {
        {
          add(new ResultMap.Builder(config, "defaultResultMap", Author.class, new ArrayList<ResultMapping>() {
            {
              add(new ResultMapping.Builder(config, "id", "id", registry.getTypeHandler(int.class)).build());
              add(new ResultMapping.Builder(config, "username", "username", registry.getTypeHandler(String.class)).build());
              add(new ResultMapping.Builder(config, "password", "password", registry.getTypeHandler(String.class)).build());
              add(new ResultMapping.Builder(config, "email", "email", registry.getTypeHandler(String.class)).build());
              add(new ResultMapping.Builder(config, "bio", "bio", registry.getTypeHandler(String.class)).build());
            }
          }).build());
        }
      }).build();
  return ms;
}

Example #10

Source File: DefaultResultSetHandler.java From mybatis with Apache License 2.0

6 votes

private CacheKey createKeyForMultipleResults(ResultSet rs, ResultMapping resultMapping, String names, String columns) throws SQLException {
  CacheKey cacheKey = new CacheKey();
  cacheKey.update(resultMapping);
  if (columns != null && names != null) {
    String[] columnsArray = columns.split(",");
    String[] namesArray = names.split(",");
    for (int i = 0 ; i < columnsArray.length ; i++) {
      Object value = rs.getString(columnsArray[i]);
      if (value != null) {
        cacheKey.update(namesArray[i]);
        cacheKey.update(value);
      }
    }
  }
  return cacheKey;
}

Example #11

Source File: MapperBuilderAssistant.java From mybaties with Apache License 2.0

6 votes

/** Backward compatibility signature */
//向后兼容方法
public ResultMapping buildResultMapping(
    Class<?> resultType,
    String property,
    String column,
    Class<?> javaType,
    JdbcType jdbcType,
    String nestedSelect,
    String nestedResultMap,
    String notNullColumn,
    String columnPrefix,
    Class<? extends TypeHandler<?>> typeHandler,
    List<ResultFlag> flags) {
    return buildResultMapping(
      resultType, property, column, javaType, jdbcType, nestedSelect, 
      nestedResultMap, notNullColumn, columnPrefix, typeHandler, flags, null, null, configuration.isLazyLoadingEnabled());
}

Example #12

Source File: DefaultResultSetHandler.java From mybaties with Apache License 2.0

6 votes

private void handleRowValuesForNestedResultMap(ResultSetWrapper rsw, ResultMap resultMap, ResultHandler resultHandler, RowBounds rowBounds, ResultMapping parentMapping) throws SQLException {
  final DefaultResultContext resultContext = new DefaultResultContext();
  skipRows(rsw.getResultSet(), rowBounds);
  Object rowValue = null;
  while (shouldProcessMoreRows(resultContext, rowBounds) && rsw.getResultSet().next()) {
    final ResultMap discriminatedResultMap = resolveDiscriminatedResultMap(rsw.getResultSet(), resultMap, null);
    final CacheKey rowKey = createRowKey(discriminatedResultMap, rsw, null);
    Object partialObject = nestedResultObjects.get(rowKey);
    // issue #577 && #542
    if (mappedStatement.isResultOrdered()) {
      if (partialObject == null && rowValue != null) {
        nestedResultObjects.clear();
        storeObject(resultHandler, resultContext, rowValue, parentMapping, rsw.getResultSet());
      }
      rowValue = getRowValue(rsw, discriminatedResultMap, rowKey, rowKey, null, partialObject);
    } else {
      rowValue = getRowValue(rsw, discriminatedResultMap, rowKey, rowKey, null, partialObject);
      if (partialObject == null) {
        storeObject(resultHandler, resultContext, rowValue, parentMapping, rsw.getResultSet());
      }
    }
  }
  if (rowValue != null && mappedStatement.isResultOrdered() && shouldProcessMoreRows(resultContext, rowBounds)) {
    storeObject(resultHandler, resultContext, rowValue, parentMapping, rsw.getResultSet());
  }
}

Example #13

Source File: DefaultResultSetHandler.java From mybatis with Apache License 2.0

6 votes

private Object instantiateCollectionPropertyIfAppropriate(ResultMapping resultMapping, MetaObject metaObject) {
  final String propertyName = resultMapping.getProperty();
  Object propertyValue = metaObject.getValue(propertyName);
  if (propertyValue == null) {
    Class<?> type = resultMapping.getJavaType();
    if (type == null) {
      type = metaObject.getSetterType(propertyName);
    }
    try {
      if (objectFactory.isCollection(type)) {
        propertyValue = objectFactory.create(type);
        metaObject.setValue(propertyName, propertyValue);
        return propertyValue;
      }
    } catch (Exception e) {
      throw new ExecutorException("Error instantiating collection property for result '" + resultMapping.getProperty() + "'.  Cause: " + e, e);
    }
  } else if (objectFactory.isCollection(propertyValue.getClass())) {
    return propertyValue;
  }
  return null;
}

Example #14

Source File: DefaultResultSetHandler.java From mybatis with Apache License 2.0

6 votes

private void linkToParents(ResultSet rs, ResultMapping parentMapping, Object rowValue) throws SQLException {
  CacheKey parentKey = createKeyForMultipleResults(rs, parentMapping, parentMapping.getColumn(), parentMapping.getForeignColumn());
  List<PendingRelation> parents = pendingRelations.get(parentKey);
  for (PendingRelation parent : parents) {
    if (parent != null) {
      final Object collectionProperty = instantiateCollectionPropertyIfAppropriate(parent.propertyMapping, parent.metaObject);
      if (rowValue != null) {
        if (collectionProperty != null) {
          final MetaObject targetMetaObject = configuration.newMetaObject(collectionProperty);
          targetMetaObject.add(rowValue);
        } else {
          parent.metaObject.setValue(parent.propertyMapping.getProperty(), rowValue);
        }
      }
    }
  }
}

Example #15

Source File: XMLMapperBuilder.java From mybatis with Apache License 2.0

6 votes

private String processNestedResultMappings(XNode context, List<ResultMapping> resultMappings) throws Exception {
	  //处理association|collection|case
    if ("association".equals(context.getName())
        || "collection".equals(context.getName())
        || "case".equals(context.getName())) {
    	
//    	<resultMap id="blogResult" type="Blog">
//    	  <association property="author" column="author_id" javaType="Author" select="selectAuthor"/>
//    	</resultMap>
//如果不是嵌套查询
      if (context.getStringAttribute("select") == null) {
    	//则递归调用5.1 resultMapElement
        ResultMap resultMap = resultMapElement(context, resultMappings);
        return resultMap.getId();
      }
    }
    return null;
  }

Example #16

Source File: DefaultResultSetHandler.java From mybaties with Apache License 2.0

6 votes

private void linkToParents(ResultSet rs, ResultMapping parentMapping, Object rowValue) throws SQLException {
  CacheKey parentKey = createKeyForMultipleResults(rs, parentMapping, parentMapping.getColumn(), parentMapping.getForeignColumn());
  List<PendingRelation> parents = pendingRelations.get(parentKey);
  if (parents != null) {
    for (PendingRelation parent : parents) {
      if (parent != null) {
        final Object collectionProperty = instantiateCollectionPropertyIfAppropriate(parent.propertyMapping, parent.metaObject);
        if (rowValue != null) {
          if (collectionProperty != null) {
            final MetaObject targetMetaObject = configuration.newMetaObject(collectionProperty);
            targetMetaObject.add(rowValue);
          } else {
            parent.metaObject.setValue(parent.propertyMapping.getProperty(), rowValue);
          }
        }
      }
    }
  }
}

Example #17

Source File: MapperBuilderAssistant.java From mybatis with Apache License 2.0

6 votes

/** Backward compatibility signature */
//向后兼容方法
public ResultMapping buildResultMapping(
    Class<?> resultType,
    String property,
    String column,
    Class<?> javaType,
    JdbcType jdbcType,
    String nestedSelect,
    String nestedResultMap,
    String notNullColumn,
    String columnPrefix,
    Class<? extends TypeHandler<?>> typeHandler,
    List<ResultFlag> flags) {
    return buildResultMapping(
      resultType, property, column, javaType, jdbcType, nestedSelect, 
      nestedResultMap, notNullColumn, columnPrefix, typeHandler, flags, null, null, configuration.isLazyLoadingEnabled());
}

Example #18

Source File: DefaultResultSetHandler.java From mybatis with Apache License 2.0

6 votes

private Object createResultObject(ResultSetWrapper rsw, ResultMap resultMap, List<Class<?>> constructorArgTypes, List<Object> constructorArgs, String columnPrefix)
     throws SQLException {
//得到result type
   final Class<?> resultType = resultMap.getType();
   final MetaClass metaType = MetaClass.forClass(resultType);
   final List<ResultMapping> constructorMappings = resultMap.getConstructorResultMappings();
   if (typeHandlerRegistry.hasTypeHandler(resultType)) {
     //基本型
     return createPrimitiveResultObject(rsw, resultMap, columnPrefix);
   } else if (!constructorMappings.isEmpty()) {
     //有参数的构造函数
     return createParameterizedResultObject(rsw, resultType, constructorMappings, constructorArgTypes, constructorArgs, columnPrefix);
   } else if (resultType.isInterface() || metaType.hasDefaultConstructor()) {
     //普通bean类型
     return objectFactory.create(resultType);
   } else if (shouldApplyAutomaticMappings(resultMap, false)) {
     //自动映射
     return createByConstructorSignature(rsw, resultType, constructorArgTypes, constructorArgs, columnPrefix);
   }
   throw new ExecutorException("Do not know how to create an instance of " + resultType);
 }

Example #19

Source File: MapperAnnotationBuilder.java From mybatis with Apache License 2.0

6 votes

private void applyResults(Result[] results, Class<?> resultType, List<ResultMapping> resultMappings) {
  for (Result result : results) {
    List<ResultFlag> flags = new ArrayList<ResultFlag>();
    if (result.id()) {
      flags.add(ResultFlag.ID);
    }
    ResultMapping resultMapping = assistant.buildResultMapping(
        resultType,
        nullOrEmpty(result.property()),
        nullOrEmpty(result.column()),
        result.javaType() == void.class ? null : result.javaType(),
        result.jdbcType() == JdbcType.UNDEFINED ? null : result.jdbcType(),
        hasNestedSelect(result) ? nestedSelectId(result) : null,
        null,
        null,
        null,
        result.typeHandler() == UnknownTypeHandler.class ? null : result.typeHandler(),
        flags,
        null,
        null,
        isLazy(result));
    resultMappings.add(resultMapping);
  }
}

Example #20

Source File: DefaultResultSetHandler.java From mybaties with Apache License 2.0

6 votes

private Object instantiateCollectionPropertyIfAppropriate(ResultMapping resultMapping, MetaObject metaObject) {
  final String propertyName = resultMapping.getProperty();
  Object propertyValue = metaObject.getValue(propertyName);
  if (propertyValue == null) {
    Class<?> type = resultMapping.getJavaType();
    if (type == null) {
      type = metaObject.getSetterType(propertyName);
    }
    try {
      if (objectFactory.isCollection(type)) {
        propertyValue = objectFactory.create(type);
        metaObject.setValue(propertyName, propertyValue);
        return propertyValue;
      }
    } catch (Exception e) {
      throw new ExecutorException("Error instantiating collection property for result '" + resultMapping.getProperty() + "'.  Cause: " + e, e);
    }
  } else if (objectFactory.isCollection(propertyValue.getClass())) {
    return propertyValue;
  }
  return null;
}

Example #21

Source File: XMLMapperBuilder.java From mybatis with Apache License 2.0

6 votes

private Discriminator processDiscriminatorElement(XNode context, Class<?> resultType, List<ResultMapping> resultMappings) throws Exception {
  String column = context.getStringAttribute("column");
  String javaType = context.getStringAttribute("javaType");
  String jdbcType = context.getStringAttribute("jdbcType");
  String typeHandler = context.getStringAttribute("typeHandler");
  Class<?> javaTypeClass = resolveClass(javaType);
  @SuppressWarnings("unchecked")
  Class<? extends TypeHandler<?>> typeHandlerClass = (Class<? extends TypeHandler<?>>) resolveClass(typeHandler);
  JdbcType jdbcTypeEnum = resolveJdbcType(jdbcType);
  Map<String, String> discriminatorMap = new HashMap<String, String>();
  for (XNode caseChild : context.getChildren()) {
    String value = caseChild.getStringAttribute("value");
    String resultMap = caseChild.getStringAttribute("resultMap", processNestedResultMappings(caseChild, resultMappings));
    discriminatorMap.put(value, resultMap);
  }
  return builderAssistant.buildDiscriminator(resultType, column, javaTypeClass, jdbcTypeEnum, typeHandlerClass, discriminatorMap);
}

Example #22

Source File: DefaultResultSetHandler.java From mybaties with Apache License 2.0

6 votes

private CacheKey createKeyForMultipleResults(ResultSet rs, ResultMapping resultMapping, String names, String columns) throws SQLException {
  CacheKey cacheKey = new CacheKey();
  cacheKey.update(resultMapping);
  if (columns != null && names != null) {
    String[] columnsArray = columns.split(",");
    String[] namesArray = names.split(",");
    for (int i = 0 ; i < columnsArray.length ; i++) {
      Object value = rs.getString(columnsArray[i]);
      if (value != null) {
        cacheKey.update(namesArray[i]);
        cacheKey.update(value);
      }
    }
  }
  return cacheKey;
}

Example #23

Source File: DefaultResultSetHandler.java From mybaties with Apache License 2.0

6 votes

private Object createResultObject(ResultSetWrapper rsw, ResultMap resultMap, ResultLoaderMap lazyLoader, String columnPrefix) throws SQLException {
  final List<Class<?>> constructorArgTypes = new ArrayList<Class<?>>();
  final List<Object> constructorArgs = new ArrayList<Object>();
  final Object resultObject = createResultObject(rsw, resultMap, constructorArgTypes, constructorArgs, columnPrefix);
  if (resultObject != null && !typeHandlerRegistry.hasTypeHandler(resultMap.getType())) {
    final List<ResultMapping> propertyMappings = resultMap.getPropertyResultMappings();
    for (ResultMapping propertyMapping : propertyMappings) {
      // issue gcode #109 && issue #149
      if (propertyMapping.getNestedQueryId() != null && propertyMapping.isLazy()) {
        //TODO 使用代理(cglib/javaassist)
        return configuration.getProxyFactory().createProxy(resultObject, lazyLoader, configuration, objectFactory, constructorArgTypes, constructorArgs);
      }
    }
  }
  return resultObject;
}

Example #24

Source File: DefaultResultSetHandler.java From mybatis with Apache License 2.0

6 votes

private void addPendingChildRelation(ResultSet rs, MetaObject metaResultObject, ResultMapping parentMapping) throws SQLException {
  CacheKey cacheKey = createKeyForMultipleResults(rs, parentMapping, parentMapping.getColumn(), parentMapping.getColumn());
  PendingRelation deferLoad = new PendingRelation();
  deferLoad.metaObject = metaResultObject;
  deferLoad.propertyMapping = parentMapping;
  List<PendingRelation> relations = pendingRelations.get(cacheKey);
  // issue #255
  if (relations == null) {
    relations = new ArrayList<DefaultResultSetHandler.PendingRelation>();
    pendingRelations.put(cacheKey, relations);
  }
  relations.add(deferLoad);
  ResultMapping previous = nextResultMaps.get(parentMapping.getResultSet());
  if (previous == null) {
    nextResultMaps.put(parentMapping.getResultSet(), parentMapping);
  } else {
    if (!previous.equals(parentMapping)) {
      throw new ExecutorException("Two different properties are mapped to the same resultSet");
    }
  }
}

Example #25

Source File: DefaultResultSetHandler.java From mybatis with Apache License 2.0

5 votes

private CacheKey createRowKey(ResultMap resultMap, ResultSetWrapper rsw, String columnPrefix) throws SQLException {
  final CacheKey cacheKey = new CacheKey();
  cacheKey.update(resultMap.getId());
  List<ResultMapping> resultMappings = getResultMappingsForRowKey(resultMap);
  if (resultMappings.size() == 0) {
    if (Map.class.isAssignableFrom(resultMap.getType())) {
      createRowKeyForMap(rsw, cacheKey);
    } else {
      createRowKeyForUnmappedProperties(resultMap, rsw, cacheKey, columnPrefix);
    }
  } else {
    createRowKeyForMappedProperties(resultMap, rsw, cacheKey, resultMappings, columnPrefix);
  }
  return cacheKey;
}

Example #26

Source File: DefaultResultSetHandler.java From mybaties with Apache License 2.0

5 votes

private CacheKey createRowKey(ResultMap resultMap, ResultSetWrapper rsw, String columnPrefix) throws SQLException {
  final CacheKey cacheKey = new CacheKey();
  cacheKey.update(resultMap.getId());
  List<ResultMapping> resultMappings = getResultMappingsForRowKey(resultMap);
  if (resultMappings.size() == 0) {
    if (Map.class.isAssignableFrom(resultMap.getType())) {
      createRowKeyForMap(rsw, cacheKey);
    } else {
      createRowKeyForUnmappedProperties(resultMap, rsw, cacheKey, columnPrefix);
    }
  } else {
    createRowKeyForMappedProperties(resultMap, rsw, cacheKey, resultMappings, columnPrefix);
  }
  return cacheKey;
}

Example #27

Source File: DefaultResultSetHandler.java From mybatis with Apache License 2.0

5 votes

private void handleRowValues(ResultSetWrapper rsw, ResultMap resultMap, ResultHandler resultHandler, RowBounds rowBounds, ResultMapping parentMapping) throws SQLException {
  if (resultMap.hasNestedResultMaps()) {
    ensureNoRowBounds();
    checkResultHandler();
    handleRowValuesForNestedResultMap(rsw, resultMap, resultHandler, rowBounds, parentMapping);
  } else {
    handleRowValuesForSimpleResultMap(rsw, resultMap, resultHandler, rowBounds, parentMapping);
  }
}

Example #28

Source File: DefaultResultSetHandler.java From mybaties with Apache License 2.0

5 votes

private Object prepareParameterForNestedQuery(ResultSet rs, ResultMapping resultMapping, Class<?> parameterType, String columnPrefix) throws SQLException {
  if (resultMapping.isCompositeResult()) {
    return prepareCompositeKeyParameter(rs, resultMapping, parameterType, columnPrefix);
  } else {
    return prepareSimpleKeyParameter(rs, resultMapping, parameterType, columnPrefix);
  }
}

Example #29

Source File: DefaultResultSetHandler.java From mybaties with Apache License 2.0

5 votes

private Object getNestedQueryConstructorValue(ResultSet rs, ResultMapping constructorMapping, String columnPrefix) throws SQLException {
  final String nestedQueryId = constructorMapping.getNestedQueryId();
  final MappedStatement nestedQuery = configuration.getMappedStatement(nestedQueryId);
  final Class<?> nestedQueryParameterType = nestedQuery.getParameterMap().getType();
  final Object nestedQueryParameterObject = prepareParameterForNestedQuery(rs, constructorMapping, nestedQueryParameterType, columnPrefix);
  Object value = null;
  if (nestedQueryParameterObject != null) {
    final BoundSql nestedBoundSql = nestedQuery.getBoundSql(nestedQueryParameterObject);
    final CacheKey key = executor.createCacheKey(nestedQuery, nestedQueryParameterObject, RowBounds.DEFAULT, nestedBoundSql);
    final Class<?> targetType = constructorMapping.getJavaType();
    final ResultLoader resultLoader = new ResultLoader(configuration, executor, nestedQuery, nestedQueryParameterObject, targetType, key, nestedBoundSql);
    value = resultLoader.loadResult();
  }
  return value;
}

Example #30

Source File: DefaultResultSetHandler.java From mybaties with Apache License 2.0

5 votes

private Object createPrimitiveResultObject(ResultSetWrapper rsw, ResultMap resultMap, String columnPrefix) throws SQLException {
  final Class<?> resultType = resultMap.getType();
  final String columnName;
  if (!resultMap.getResultMappings().isEmpty()) {
    final List<ResultMapping> resultMappingList = resultMap.getResultMappings();
    final ResultMapping mapping = resultMappingList.get(0);
    columnName = prependPrefix(mapping.getColumn(), columnPrefix);
  } else {
    //因为只有1列，所以取得这一列的名字
    columnName = rsw.getColumnNames().get(0);
  }
  final TypeHandler<?> typeHandler = rsw.getTypeHandler(resultType, columnName);
  return typeHandler.getResult(rsw.getResultSet(), columnName);
}