Package org.mybatis.generator.codegen.mybatis3.xmlmapper.elements

Source Code of org.mybatis.generator.codegen.mybatis3.xmlmapper.elements.DeleteByPrimaryKeyElementGenerator

/*
*  Copyright 2009 The Apache Software Foundation
*
*  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 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 DeleteByPrimaryKeyElementGenerator extends AbstractXmlElementGenerator {

  public DeleteByPrimaryKeyElementGenerator() {
    super();
  }

  @Override
  public void addElements(XmlElement parentElement) {
    XmlElement answer = new XmlElement("delete"); //$NON-NLS-1$

    answer.addAttribute(new Attribute("id", introspectedTable.getDeleteByPrimaryKeyStatementId())); //$NON-NLS-1$
    String parameterClass;
    if (introspectedTable.getRules().generatePrimaryKeyClass()) {
      parameterClass = 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) {
        parameterClass = "map"; //$NON-NLS-1$
      } else {
        parameterClass = introspectedTable.getPrimaryKeyColumns().get(0).getFullyQualifiedJavaType().toString();
      }
    }
    answer.addAttribute(new Attribute("parameterType", //$NON-NLS-1$
        parameterClass));

    context.getCommentGenerator().addComment(answer);

    StringBuilder sb = new StringBuilder();
    sb.append("delete from "); //$NON-NLS-1$
    sb.append(introspectedTable.getFullyQualifiedTableNameAtRuntime());
    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.getEscapedColumnName(introspectedColumn));
      sb.append(" = "); //$NON-NLS-1$
      sb.append(MyBatis3FormattingUtilities.getParameterClause(introspectedColumn));
      answer.addElement(new TextElement(sb.toString()));
    }

    if (context.getPlugins().sqlMapDeleteByPrimaryKeyElementGenerated(answer, introspectedTable)) {
      parentElement.addElement(answer);
    }
  }
}
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