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  package org.apache.cayenne.access.translator.ejbql;
  
  import org.apache.cayenne.ejbql.EJBQLExpressionVisitor;
  
  /**
   * A default EJBQLTranslatorFactory.
   * 
   * @since 3.0
   */
  public class JdbcEJBQLTranslatorFactory implements EJBQLTranslatorFactory {
  
      protected static final String JOIN_APPENDER_KEY = "$JoinAppender";
      
      protected boolean caseInsensitive = false;
  
      public EJBQLJoinAppender getJoinAppender(EJBQLTranslationContext context) {
          EJBQLJoinAppender appender = (EJBQLJoinAppender) context
                  .getAttribute(JOIN_APPENDER_KEY);
  
          if (appender == null) {
              appender = new EJBQLJoinAppender(context);
              context.setAttribute(JOIN_APPENDER_KEY, appender);
          }
  
          return appender;
      }
  
      public EJBQLExpressionVisitor getDeleteTranslator(EJBQLTranslationContext context) {
          context.setUsingAliases(false);
          return new EJBQLDeleteTranslator(context);
      }
  
      public EJBQLExpressionVisitor getSelectTranslator(EJBQLTranslationContext context) {
          return new EJBQLSelectTranslator(context);
      }
  
      public EJBQLExpressionVisitor getUpdateTranslator(EJBQLTranslationContext context) {
          context.setUsingAliases(false);
          return new EJBQLUpdateTranslator(context);
      }
  
      public EJBQLExpressionVisitor getAggregateColumnTranslator(
              EJBQLTranslationContext context) {
          return new EJBQLAggregateColumnTranslator(context);
      }
  
      public EJBQLExpressionVisitor getConditionTranslator(EJBQLTranslationContext context) {
          context.setCaseInsensitive(caseInsensitive);
          return new EJBQLConditionTranslator(context);
      }
  
      public EJBQLExpressionVisitor getFromTranslator(EJBQLTranslationContext context) {
          return new EJBQLFromTranslator(context);
      }
  
      public EJBQLExpressionVisitor getGroupByTranslator(EJBQLTranslationContext context) {
          return new EJBQLGroupByTranslator(context);
      }
  
      public EJBQLExpressionVisitor getIdentifierColumnsTranslator(
              EJBQLTranslationContext context) {
          if(context.getMetadata().getPageSize() > 0){
              return new EJBQLIdColumnsTranslator(context);
          }
          else{
              return new EJBQLIdentifierColumnsTranslator(context);
          }
      }
  
      public EJBQLExpressionVisitor getOrderByTranslator(EJBQLTranslationContext context) {
          return new EJBQLOrderByTranslator(context);
      }
  
      public EJBQLExpressionVisitor getSelectColumnsTranslator(
              EJBQLTranslationContext context) {
          return new EJBQLSelectColumnsTranslator(context);
      }
  
      public EJBQLExpressionVisitor getUpdateItemTranslator(EJBQLTranslationContext context) {
          return new EJBQLUpdateItemTranslator(context);
      }
      
      public void setCaseInsensitive(boolean caseInsensitive) {
          this.caseInsensitive = caseInsensitive;
      }
  }
  