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## org.apache.cayenne.access.jdbc
Class EJBQLSelectColumnsTranslator

    java.lang.Object
      org.apache.cayenne.ejbql.EJBQLBaseVisitor
          org.apache.cayenne.access.jdbc.EJBQLSelectColumnsTranslator

All Implemented Interfaces:
  EJBQLExpressionVisitor

    public class EJBQLSelectColumnsTranslator

extends EJBQLBaseVisitor

Translator of the EJBQL select clause.

Since:
  3.0

Field Summary
`protected EJBQLTranslationContext` | `context`

Fields inherited from class org.apache.cayenne.ejbql.EJBQLBaseVisitor
`continueFlag`

Constructor Summary
`protected` | `EJBQLSelectColumnsTranslator(EJBQLTranslationContext context)`

Method Summary
`void` | `appendColumn(String javaType, String alias, DbAttribute dbAttribute, String columnAlias)`
`boolean` | `visitAggregate(EJBQLExpression expression)`
`boolean` | `visitIdentifier(EJBQLExpression expression)`
`boolean` | `visitPath(EJBQLExpression expression, int finishedChildIndex)` Called on visiting "path" expression and also after visiting every expression child.
`boolean` | `visitSelectExpression(EJBQLExpression expression)`

Methods inherited from class org.apache.cayenne.ejbql.EJBQLBaseVisitor
`visitAbs, visitAbstractSchemaName, visitAdd, visitAll, visitAnd, visitAny, visitAscending, visitAverage, visitBetween, visitBooleanLiteral, visitClassName, visitConcat, visitConstructor, visitConstructorParameter, visitConstructorParameters, visitCount, visitCurrentDate, visitCurrentTime, visitCurrentTimestamp, visitDbPath, visitDecimalLiteral, visitDelete, visitDescending, visitDistinct, visitDivide, visitEquals, visitEscapeCharacter, visitExists, visitFrom, visitFromItem, visitGreaterOrEqual, visitGreaterThan, visitGroupBy, visitHaving, visitIdentificationVariable, visitIn, visitInnerFetchJoin, visitInnerJoin, visitIntegerLiteral, visitIsEmpty, visitIsNull, visitLength, visitLessOrEqual, visitLessThan, visitLike, visitLocate, visitLower, visitMax, visitMemberOf, visitMin, visitMod, visitMultiply, visitNamedInputParameter, visitNegative, visitNot, visitNotEquals, visitOr, visitOrderBy, visitOrderByItem, visitOuterFetchJoin, visitOuterJoin, visitPatternValue, visitPositionalInputParameter, visitSelect, visitSelectClause, visitSelectExpressions, visitSize, visitSqrt, visitStringLiteral, visitSubselect, visitSubstring, visitSubtract, visitSum, visitTok, visitTrim, visitTrimBoth, visitTrimCharacter, visitTrimLeading, visitTrimTrailing, visitUpdate, visitUpdateField, visitUpdateItem, visitUpdateValue, visitUpper, visitWhere`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### context

    protected EJBQLTranslationContext context

Constructor Detail

### EJBQLSelectColumnsTranslator

    protected EJBQLSelectColumnsTranslator(EJBQLTranslationContext context)

Method Detail

### visitSelectExpression

    public boolean visitSelectExpression(EJBQLExpression expression)

  Specified by:
    `visitSelectExpression` in interface `EJBQLExpressionVisitor`
  Overrides:
    `visitSelectExpression` in class `EJBQLBaseVisitor`

### visitAggregate

    public boolean visitAggregate(EJBQLExpression expression)

  Specified by:
    `visitAggregate` in interface `EJBQLExpressionVisitor`
  Overrides:
    `visitAggregate` in class `EJBQLBaseVisitor`

### visitPath

    public boolean visitPath(EJBQLExpression expression,
                             int finishedChildIndex)

  Description copied from interface: `EJBQLExpressionVisitor`
  Called on visiting "path" expression and also after visiting every expression child.

  Specified by:
    `visitPath` in interface `EJBQLExpressionVisitor`
  Overrides:
    `visitPath` in class `EJBQLBaseVisitor`
  Parameters:
    `expression` - a "path" node being visited.
    `finishedChildIndex` - "-1" when the expression node is visited for the first time, before its children; otherwise this is an index of a child just visited.

### visitIdentifier

    public boolean visitIdentifier(EJBQLExpression expression)

  Specified by:
    `visitIdentifier` in interface `EJBQLExpressionVisitor`
  Overrides:
    `visitIdentifier` in class `EJBQLBaseVisitor`

### appendColumn

    public void appendColumn(String javaType,
                             String alias,
                             DbAttribute dbAttribute,
                             String columnAlias)

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