Package org.apache.cayenne.ejbql

Interface EJBQLExpression

All Known Subinterfaces:
Node
All Known Implementing Classes:
AggregateConditionNode, EJBQLAbs, EJBQLAbstractSchemaName, EJBQLAdd, EJBQLAggregate, EJBQLAggregateColumn, EJBQLAll, EJBQLAnd, EJBQLAny, EJBQLAscending, EJBQLAverage, EJBQLBetween, EJBQLBooleanLiteral, EJBQLClassName, EJBQLConcat, EJBQLConstructor, EJBQLConstructorParameter, EJBQLConstructorParameters, EJBQLCount, EJBQLCurrentDate, EJBQLCurrentTime, EJBQLCurrentTimestamp, EJBQLDbPath, EJBQLDecimalLiteral, EJBQLDelete, EJBQLDescending, EJBQLDistinct, EJBQLDivide, EJBQLEquals, EJBQLEscapeCharacter, EJBQLExists, EJBQLFrom, EJBQLFromItem, EJBQLGreaterOrEqual, EJBQLGreaterThan, EJBQLGroupBy, EJBQLHaving, EJBQLIdentificationVariable, EJBQLIdentifier, EJBQLIn, EJBQLInnerFetchJoin, EJBQLInnerJoin, EJBQLIntegerLiteral, EJBQLIsEmpty, EJBQLIsNull, EJBQLJoin, EJBQLLength, EJBQLLessOrEqual, EJBQLLessThan, EJBQLLike, EJBQLLocate, EJBQLLower, EJBQLMax, EJBQLMemberOf, EJBQLMin, EJBQLMod, EJBQLMultiply, EJBQLNamedInputParameter, EJBQLNegative, EJBQLNot, EJBQLNotEquals, EJBQLOr, EJBQLOrderBy, EJBQLOrderByItem, EJBQLOuterFetchJoin, EJBQLOuterJoin, EJBQLPath, EJBQLPatternValue, EJBQLPositionalInputParameter, EJBQLSelect, EJBQLSelectClause, EJBQLSelectExpression, EJBQLSelectExpressions, EJBQLSize, EJBQLSqrt, EJBQLStringLiteral, EJBQLSubselect, EJBQLSubstring, EJBQLSubtract, EJBQLSum, EJBQLTok, EJBQLTrim, EJBQLTrimBoth, EJBQLTrimCharacter, EJBQLTrimLeading, EJBQLTrimSpecification, EJBQLTrimTrailing, EJBQLUpdate, EJBQLUpdateField, EJBQLUpdateItem, EJBQLUpdateValue, EJBQLUpper, EJBQLWhere, SimpleNode
public interface EJBQLExpression
An abstract EJBQL expression interface.
Since:
3.0

  • Method Summary

    Modifier and Type Method Description
    EJBQLExpression getChild​(int index)
    Returns a child expression node at the specified index.
    int getChildrenCount()
    Returns a number of child operands of this expression node.
    String getText()
    Returns a text property of the node.
    boolean isNegated()
    Returns an optional boolean flag that negates the value of the expression.
    void visit​(EJBQLExpressionVisitor visitor)
    Accepts a visitor, calling appropriate visitor method.

  • Method Details

    • visit

      void visit​(EJBQLExpressionVisitor visitor)
      Accepts a visitor, calling appropriate visitor method. If the visitor method returns true, visits all children, otherwise stops.

    • getChildrenCount

      int getChildrenCount()
      Returns a number of child operands of this expression node.

    • getChild

      EJBQLExpression getChild​(int index)
      Returns a child expression node at the specified index.

    • getText

      String getText()
      Returns a text property of the node.

    • isNegated

      boolean isNegated()
      Returns an optional boolean flag that negates the value of the expression.