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The MyBatis SQL mapper framework makes it easier to use a relational database with object-oriented applications. MyBatis couples objects with stored procedures or SQL statements using a XML descriptor or annotations. Simplicity is the biggest advantage of the MyBatis data mapper over object relational mapping tools.

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package com.ibatis.sqlmap.engine.config;

import com.ibatis.sqlmap.client.extensions.*;
import com.ibatis.sqlmap.engine.impl.*;
import com.ibatis.sqlmap.engine.mapping.parameter.*;
import com.ibatis.sqlmap.engine.scope.*;
import com.ibatis.sqlmap.engine.type.*;

import java.util.*;

public class ParameterMapConfig {
  public static final String MODE_IN = "IN";
  public static final String MODE_OUT = "OUT";
  public static final String MODE_INOUT = "INUOT";

  private SqlMapConfiguration config;
  private ErrorContext errorContext;
  private SqlMapClientImpl client;
  private ParameterMap parameterMap;
  private List parameterMappingList;

  ParameterMapConfig(SqlMapConfiguration config, String id, Class parameterClass) {
    this.config = config;
    this.errorContext = config.getErrorContext();
    this.client = config.getClient();
    errorContext.setActivity("building a parameter map");
    parameterMap = new ParameterMap(client.getDelegate());
    parameterMap.setId(id);
    parameterMap.setResource(errorContext.getResource());
    errorContext.setObjectId(id + " parameter map");
    parameterMap.setParameterClass(parameterClass);
    errorContext.setMoreInfo("Check the parameter mappings.");
    this.parameterMappingList = new ArrayList();
    client.getDelegate().addParameterMap(parameterMap);
  }

  public void addParameterMapping(String propertyName, Class javaClass, String jdbcType, String nullValue, String mode, String outParamType, Integer numericScale, Object typeHandlerImpl, String resultMap) {
    errorContext.setObjectId(propertyName + " mapping of the " + parameterMap.getId() + " parameter map");
    TypeHandler handler;
    if (typeHandlerImpl != null) {
      errorContext.setMoreInfo("Check the parameter mapping typeHandler attribute '" + typeHandlerImpl + "' (must be a TypeHandler or TypeHandlerCallback implementation).");
      if (typeHandlerImpl instanceof TypeHandlerCallback) {
        handler = new CustomTypeHandler((TypeHandlerCallback) typeHandlerImpl);
      } else if (typeHandlerImpl instanceof TypeHandler) {
        handler = (TypeHandler) typeHandlerImpl;
      } else {
        throw new RuntimeException("The class '" + typeHandlerImpl + "' is not a valid implementation of TypeHandler or TypeHandlerCallback");
      }
    } else {
      errorContext.setMoreInfo("Check the parameter mapping property type or name.");
      handler = config.resolveTypeHandler(client.getDelegate().getTypeHandlerFactory(), parameterMap.getParameterClass(), propertyName, javaClass, jdbcType);
    }
    ParameterMapping mapping = new ParameterMapping();
    mapping.setPropertyName(propertyName);
    mapping.setJdbcTypeName(jdbcType);
    mapping.setTypeName(outParamType);
    mapping.setResultMapName(resultMap);
    mapping.setNullValue(nullValue);
    if (mode != null && mode.length() > 0) {
      mapping.setMode(mode);
    }
    mapping.setTypeHandler(handler);
    mapping.setJavaType(javaClass);
    mapping.setNumericScale(numericScale);
    parameterMappingList.add(mapping);
    parameterMap.setParameterMappingList(parameterMappingList);
  }

}