/**
* 生成泛型对应的ResultMap
*
* @param namespace
* @param clazz
* @param conf
* @return
*/
private List<ResultMap> getResultMap(String namespace, Class<?> clazz, Configuration conf) {
String dynamicResultMapId = namespace + "." + GENERATE_RESULT_MAP_NAME;
ResultMap dynamicResultMap = buildResultMap(dynamicResultMapId, clazz, conf);
List<ResultMap> resultMaps = Lists.newArrayList();
resultMaps.add(dynamicResultMap);
return Collections.unmodifiableList(resultMaps);
}
/**
* 构建ResultMap对象
*
* @param id
* @param clazz
* @param configuration
* @return
*/
private ResultMap buildResultMap(String id, Class<?> clazz, Configuration configuration) {
// 判断是否已经存在缓存里
if (configuration.hasResultMap(id)) {
return configuration.getResultMap(id);
}
List<ResultMapping> resultMappings = Lists.newArrayList();
Map<String, Field> columns = EntityUtil.getFields(clazz);
for (Map.Entry<String, Field> column : columns.entrySet()) {
Field field = column.getValue();
String fieldName = field.getName();
Class<?> columnTypeClass = resolveResultJavaType(clazz, fieldName, null);
List<ResultFlag> flags = Lists.newArrayList();
if (field.isAnnotationPresent(Id.class)) {
flags.add(ResultFlag.ID);
}
String columnName = column.getKey();
resultMappings.add(
buildResultMapping(configuration, fieldName, columnName, columnTypeClass, flags));
}
// 构建ResultMap
ResultMap.Builder resultMapBuilder =
new ResultMap.Builder(configuration, id, clazz, resultMappings);
ResultMap rm = resultMapBuilder.build();
// 放到缓存中
configuration.addResultMap(rm);
return rm;
}
private SqlSource getSqlSource(
MappedStatement ms, SqlSource sqlSource, Object parameterObject, boolean isCount) {
if (ms.getSqlSource() instanceof DynamicSqlSource) {
MetaObject msObject = MetaObjectUtils.forObject(ms);
SqlNode sqlNode = (SqlNode) msObject.getValue("sqlSource.rootSqlNode");
MixedSqlNode mixedSqlNode = null;
if (sqlNode instanceof MixedSqlNode) {
mixedSqlNode = (MixedSqlNode) sqlNode;
} else {
List<SqlNode> contents = new ArrayList<SqlNode>(1);
contents.add(sqlNode);
mixedSqlNode = new MixedSqlNode(contents);
}
return new CustomerDynamicSqlSource(ms.getConfiguration(), mixedSqlNode, isCount, dialect);
} else if (sqlSource instanceof ProviderSqlSource) {
return new CustomerProviderSqlSource(
ms.getConfiguration(), (ProviderSqlSource) sqlSource, isCount, dialect);
} else if (!isCount) {
BoundSql boundSql = sqlSource.getBoundSql(parameterObject);
return new StaticSqlSource(
ms.getConfiguration(),
dialect.generatePageSQL(boundSql.getSql()),
MybatisUtils.plusTwoParameterToMapping(ms.getConfiguration(), boundSql));
} else {
BoundSql boundSql = sqlSource.getBoundSql(parameterObject);
return new StaticSqlSource(
ms.getConfiguration(),
dialect.generateCountSQL(boundSql.getSql()),
boundSql.getParameterMappings());
}
}
