add query and load

mybatis-jpa-extra-core/src/main/java/org/apache/mybatis/jpa/persistence/IJpaBaseMapper.java

@@ -14,8 +14,7 @@ import org.apache.ibatis.annotations.UpdateProvider;
  */
 public interface IJpaBaseMapper<T> {
 	
-	public List<T> select(T entity);
-	
+	@SelectProvider(type = MapperSqlProvider.class, method = "query")
 	public List<T> query(T entity);
 	
 	//TODO follow function for Query
@@ -35,12 +34,6 @@ public interface IJpaBaseMapper<T> {
 	@SelectProvider(type = MapperSqlProvider.class, method = "get")
 	public T get(@Param ("entityClass")Class<?> entityClass,@Param ("id") String id);
 	
-	/**
-	 * query by entity
-	 * @param entity
-	 * @return one
-	 */
-	public T load(T entity);
 	
 	//TODO follow function for insert update and delete
 	@InsertProvider(type = MapperSqlProvider.class, method = "insert")

mybatis-jpa-extra-core/src/main/java/org/apache/mybatis/jpa/persistence/JpaBaseService.java

@@ -181,15 +181,6 @@ public  class  JpaBaseService <T extends JpaBaseDomain> {
 		return null;
 	}
 	
-	public List<T> select(T entity) {
-		try {
-			return getMapper().select(entity);
-		} catch(Exception e) {
-			e.printStackTrace();
-		}
-		return null;
-	}
-	
 	/**
 	 *  query list entity by entity 
 	 * @param entity
@@ -227,7 +218,8 @@ public  class  JpaBaseService <T extends JpaBaseDomain> {
 	 */
 	public T load(T entity) {
 		try {
-			return getMapper().load(entity);
+			List<T> entityList=getMapper().query(entity);
+			return entityList!=null&&entityList.size()>0?entityList.get(0):null;
 		} catch(Exception e) {
 			e.printStackTrace();
 		}
@@ -241,6 +233,7 @@ public  class  JpaBaseService <T extends JpaBaseDomain> {
 	 */
 	public T get(String id) {
 		try {
+			log.debug("entityClass  "+entityClass.toGenericString()+" , id "+id);
 			return  getMapper().get(this.entityClass,id);
 		} catch(Exception e) {
 			e.printStackTrace();

mybatis-jpa-extra-core/src/main/java/org/apache/mybatis/jpa/persistence/MapperSqlProvider.java

@@ -226,6 +226,23 @@ public class MapperSqlProvider <T extends JpaBaseDomain>{
 		_logger.trace("Count SQL : \n" + sql);
 		return sql.toString();
 	}
+	
+	public String query(T entity) {
+		buildColumnList(entity.getClass());
+		SQL sql=new SQL();
+		sql.SELECT(" * ");  
+        sql.FROM(getTableName(entity.getClass()));  
+        
+        for(FieldColumnMapper fieldColumnMapper  : fieldsMap.get(entity.getClass().getSimpleName())) {
+        	if(fieldColumnMapper.getFieldType().equalsIgnoreCase("String")&&BeanUtil.getValue(entity, fieldColumnMapper.getFieldName())==null) {
+				//skip null field value
+			}else {
+				sql.WHERE(fieldColumnMapper.getColumnName() + "=#{" + fieldColumnMapper.getFieldName() + "}");
+			}
+		}
+		
+		return sql.toString();
+	}
 
 	public String getTableName(Class<?> entityClass) {
 		Table table = (Table)entityClass.getAnnotation(Table.class);

mybatis-jpa-extra-core/src/test/resources/org/apache/mybatis/jpa/test/dao/persistence/xml/mysql/StudentsMapper.xml

@@ -46,7 +46,7 @@
     	<include refid="sql_condition"/>
     </select>
        
-     <select id="query" parameterType="Students" resultType="Students">
+     <select id="queryBy" parameterType="Students" resultType="Students">
     	SELECT 
     		ID		   ,
 			STDNO      ,