Class ConditionExp

java.lang.Object

org.apache.cayenne.exp.Expression

org.apache.cayenne.exp.ConditionExp

All Implemented Interfaces:

XMLSerializable

Direct Known Subclasses:

AllExp, AnyExp, BetweenExp, EqualExp, ExistsExp, FalseExp, GreaterExp, GreaterOrEqualExp, InExp, LessExp, LessOrEqualExp, NotBetweenExp, NotEqualExp, NotExistsExp, NotInExp, PatternMatchExp, TrueExp

public abstract sealed class ConditionExp
extends Expression
permits AllExp, AnyExp, BetweenExp, EqualExp, ExistsExp, FalseExp, GreaterExp, GreaterOrEqualExp, InExp, LessExp, LessOrEqualExp, NotBetweenExp, NotEqualExp, NotExistsExp, NotInExp, PatternMatchExp, TrueExp

Superclass of conditional expressions.

Since:

5.0

Field Summary

Fields inherited from class Expression

operands, PRUNED_NODE

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ConditionExp(Object... operands)

Method Summary

Modifier and Type	Method	Description
protected Object	evaluateNode(Object o)	Evaluates itself with object, pushing result on the stack.
protected abstract Boolean	evaluateSubNode(Object o, Object[] evaluatedChildren)
Expression	exists()	Returns expression that will be dynamically resolved to proper subqueries based on a relationships used (if no relationships are present in the original expression no subqueries will be used).
protected abstract int	getRequiredChildrenCount()
protected boolean	isValidParent(Expression parent)	Whether this node can be an operand of the given node.
Expression	notExists()	Returns expression that will be dynamically resolved to proper subqueries based on a relationships used (if no relationships are present in the original expression no subqueries will be used).

Methods inherited from class Expression

andExp, andExp, appendAsString, appendOperandAsString, deepCopy, encodeAsXML, equals, evaluate, evaluateOperand, expName, filter, filterObjects, first, flattenTree, getExpressionOperator, getOperand, getOperandCount, getPathAliases, hashCode, match, notExp, orExp, orExp, params, params, paramsArray, parenthesizeAsOperand, pruneNodeForPrunedChild, setOperand, setOperands, shallowCopy, toString, transform, transformExpression, traverse, traverse

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

ConditionExp

protected ConditionExp(Object... operands)

Method Details

isValidParent

protected boolean isValidParent(Expression parent)

Description copied from class: Expression

Whether this node can be an operand of the given node. Called by the parent when the operand is set, to check what the grammar can't: e.g. a condition can only be an operand of a condition aggregate. By default any parent is valid.

Overrides:

isValidParent in class Expression

evaluateNode

protected Object evaluateNode(Object o)
                       throws Exception

Description copied from class: Expression

Evaluates itself with object, pushing result on the stack.

Specified by:

evaluateNode in class Expression

Throws:

Exception

getRequiredChildrenCount

protected abstract int getRequiredChildrenCount()

evaluateSubNode

protected abstract Boolean evaluateSubNode(Object o,
 Object[] evaluatedChildren)
                                    throws Exception

Throws:

Exception

exists

public Expression exists()

Returns expression that will be dynamically resolved to proper subqueries based on a relationships used (if no relationships are present in the original expression no subqueries will be used).

Overrides:

exists in class Expression

Returns:

exists expression

See Also:

• ExpressionFactory.exists(Expression)

notExists

public Expression notExists()

Returns expression that will be dynamically resolved to proper subqueries based on a relationships used (if no relationships are present in the original expression no subqueries will be used).

Overrides:

notExists in class Expression

Returns:

not exists expression

See Also:

• ExpressionFactory.notExists(Expression)