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   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you 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
   *
   *    https://www.apache.org/licenses/LICENSE-2.0
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   *  Unless required by applicable law or agreed to in writing,
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  package org.apache.cayenne.ejbql;
  
  import org.apache.cayenne.ejbql.parser.EJBQLAggregateColumn;
  import org.apache.cayenne.ejbql.parser.EJBQLDecimalLiteral;
  import org.apache.cayenne.ejbql.parser.EJBQLFromItem;
  import org.apache.cayenne.ejbql.parser.EJBQLIntegerLiteral;
  import org.apache.cayenne.ejbql.parser.EJBQLJoin;
  import org.apache.cayenne.ejbql.parser.EJBQLPositionalInputParameter;
  
  /**
   * A noop implementation of the EJBQL visitor that returns same preset boolean value from
   * all methods. Intended for subclassing.
   * 
   * @since 3.0
   */
  public class EJBQLBaseVisitor implements EJBQLExpressionVisitor {
  
      protected boolean continueFlag;
  
      public EJBQLBaseVisitor() {
          this(true);
      }
  
      public EJBQLBaseVisitor(boolean continueFlag) {
          this.continueFlag = continueFlag;
      }
  
      public boolean visitAbs(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitAbstractSchemaName(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitAdd(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitAggregate(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitAll(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitAnd(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitAny(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitAscending(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitAverage(EJBQLAggregateColumn expression) {
          return continueFlag;
      }
  
      public boolean visitBetween(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitBooleanLiteral(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitClassName(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitConcat(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitConstructor(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitConstructorParameter(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitConstructorParameters(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitCount(EJBQLAggregateColumn expression) {
          return continueFlag;
      }
  
      public boolean visitCurrentDate(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitCurrentTime(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitCurrentTimestamp(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitDecimalLiteral(EJBQLDecimalLiteral expression) {
          return continueFlag;
      }
  
      public boolean visitDelete(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitDescending(EJBQLExpression expression) {
          return continueFlag;
      }
      
      public boolean visitDbPath(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitDistinct(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitDivide(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitEquals(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitEscapeCharacter(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitExists(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitFrom(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitFromItem(EJBQLFromItem expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitGreaterOrEqual(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitGreaterThan(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitGroupBy(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitHaving(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitIdentificationVariable(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitIdentifier(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitIn(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitInnerFetchJoin(EJBQLJoin join) {
          return continueFlag;
      }
  
      public boolean visitInnerJoin(EJBQLJoin join) {
          return continueFlag;
      }
  
      public boolean visitIntegerLiteral(EJBQLIntegerLiteral expression) {
          return continueFlag;
      }
  
      public boolean visitIsEmpty(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitIsNull(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitLength(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitLessOrEqual(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitLessThan(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitLike(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitLocate(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitLower(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitMax(EJBQLAggregateColumn expression) {
          return continueFlag;
      }
  
      public boolean visitMemberOf(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitMin(EJBQLAggregateColumn expression) {
          return continueFlag;
      }
  
      public boolean visitMod(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitMultiply(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitNamedInputParameterForIn(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitNamedInputParameter(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitNegative(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitNot(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitNotEquals(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitOr(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitOrderBy(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitOrderByItem(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitOuterFetchJoin(EJBQLJoin join) {
          return continueFlag;
      }
  
      public boolean visitOuterJoin(EJBQLJoin join) {
          return continueFlag;
      }
  
      public boolean visitPath(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitPatternValue(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitPositionalInputParameterForIn(EJBQLPositionalInputParameter expression) {
          return continueFlag;
      }
  
      public boolean visitPositionalInputParameter(EJBQLPositionalInputParameter expression) {
          return continueFlag;
      }
  
      public boolean visitSelect(EJBQLExpression expression) {
          return continueFlag;
      }
      
      public boolean visitSelectClause(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitSelectExpression(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitSelectExpressions(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitSize(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitSqrt(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitStringLiteral(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitSubselect(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitSubstring(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitSubtract(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitSum(EJBQLAggregateColumn expression) {
          return continueFlag;
      }
  
      public boolean visitTok(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitTrim(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitTrimBoth(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitTrimCharacter(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitTrimLeading(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitTrimTrailing(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitUpdate(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitUpdateField(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitUpdateItem(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitUpdateValue(EJBQLExpression expression) {
          return continueFlag;
      }
  
      public boolean visitUpper(EJBQLExpression expression, int finishedChildIndex) {
          return continueFlag;
      }
  
      public boolean visitWhere(EJBQLExpression expression) {
          return continueFlag;
      }
  }
  