/**
    *    Copyright 2006-2015 the original author or authors.
    *
    *    Licensed under the Apache License, Version 2.0 (the "License");
    *    you may not use this file except in compliance with the License.
    *    You may obtain a copy of the License at
    *
    *       http://www.apache.org/licenses/LICENSE-2.0
    *
   *    Unless required by applicable law or agreed to in writing, software
   *    distributed under the License is distributed on an "AS IS" BASIS,
   *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *    See the License for the specific language governing permissions and
   *    limitations under the License.
   */
  package org.mybatis.generator.codegen.mybatis3.xmlmapper.elements;
  
  import static org.mybatis.generator.internal.util.StringUtility.stringHasValue;
  
  import org.mybatis.generator.api.IntrospectedColumn;
  import org.mybatis.generator.api.dom.xml.Attribute;
  import org.mybatis.generator.api.dom.xml.TextElement;
  import org.mybatis.generator.api.dom.xml.XmlElement;
  import org.mybatis.generator.codegen.mybatis3.MyBatis3FormattingUtilities;
  
  /**
   * 
   * @author Jeff Butler
   * 
   */
  public class SelectByPrimaryKeyElementGenerator extends
          AbstractXmlElementGenerator {
  
      public SelectByPrimaryKeyElementGenerator() {
          super();
      }
  
      @Override
      public void addElements(XmlElement parentElement) {
          XmlElement answer = new XmlElement("select"); //$NON-NLS-1$
  
          answer.addAttribute(new Attribute(
                  "id", introspectedTable.getSelectByPrimaryKeyStatementId())); //$NON-NLS-1$
          if (introspectedTable.getRules().generateResultMapWithBLOBs()) {
              answer.addAttribute(new Attribute("resultMap", //$NON-NLS-1$
                      introspectedTable.getResultMapWithBLOBsId()));
          } else {
              answer.addAttribute(new Attribute("resultMap", //$NON-NLS-1$
                      introspectedTable.getBaseResultMapId()));
          }
  
          String parameterType;
          if (introspectedTable.getRules().generatePrimaryKeyClass()) {
              parameterType = introspectedTable.getPrimaryKeyType();
          } else {
              // PK fields are in the base class. If more than on PK
              // field, then they are coming in a map.
              if (introspectedTable.getPrimaryKeyColumns().size() > 1) {
                  parameterType = "map"; //$NON-NLS-1$
              } else {
                  parameterType = introspectedTable.getPrimaryKeyColumns().get(0)
                          .getFullyQualifiedJavaType().toString();
              }
          }
  
          answer.addAttribute(new Attribute("parameterType", //$NON-NLS-1$
                  parameterType));
  
          context.getCommentGenerator().addComment(answer);
  
          StringBuilder sb = new StringBuilder();
          sb.append("select "); //$NON-NLS-1$
  
          if (stringHasValue(introspectedTable
                  .getSelectByPrimaryKeyQueryId())) {
              sb.append('\'');
              sb.append(introspectedTable.getSelectByPrimaryKeyQueryId());
              sb.append("' as QUERYID,"); //$NON-NLS-1$
          }
          answer.addElement(new TextElement(sb.toString()));
          answer.addElement(getBaseColumnListElement());
          if (introspectedTable.hasBLOBColumns()) {
              answer.addElement(new TextElement(",")); //$NON-NLS-1$
              answer.addElement(getBlobColumnListElement());
          }
  
          sb.setLength(0);
          sb.append("from "); //$NON-NLS-1$
          sb.append(introspectedTable
                  .getAliasedFullyQualifiedTableNameAtRuntime());
          answer.addElement(new TextElement(sb.toString()));
  
          boolean and = false;
          for (IntrospectedColumn introspectedColumn : introspectedTable
                  .getPrimaryKeyColumns()) {
              sb.setLength(0);
              if (and) {
                  sb.append("  and "); //$NON-NLS-1$
              } else {
                 sb.append("where "); //$NON-NLS-1$
                 and = true;
             }
 
             sb.append(MyBatis3FormattingUtilities
                     .getAliasedEscapedColumnName(introspectedColumn));
             sb.append(" = "); //$NON-NLS-1$
             sb.append(MyBatis3FormattingUtilities
                     .getParameterClause(introspectedColumn));
             answer.addElement(new TextElement(sb.toString()));
         }
 
         if (context.getPlugins()
                 .sqlMapSelectByPrimaryKeyElementGenerated(answer,
                         introspectedTable)) {
             parentElement.addElement(answer);
         }
     }
 }