Class WhenExp

java.lang.Object

org.apache.cayenne.exp.Expression

org.apache.cayenne.exp.AggregateConditionExp

org.apache.cayenne.exp.WhenExp

All Implemented Interfaces:

XMLSerializable

public final class WhenExp
extends AggregateConditionExp

"WHEN" part of the case-when expression.

Since:

5.0

Field Summary

Fields inherited from class Expression

operands, PRUNED_NODE

Constructor Summary

Constructors

Constructor	Description
WhenExp(Object... operands)

Method Summary

Modifier and Type	Method	Description
protected Object	evaluateNode(Object o)	Evaluates itself with object, pushing result on the stack.
protected String	getExpressionOperator(int index)	Returns the operator printed between the operands, before the operand at the given index.
protected boolean	isValidParent(Expression parent)	Whether this node can be an operand of the given node.
Expression	shallowCopy()	Creates a copy of this expression node, without copying children.

Methods inherited from class AggregateConditionExp

exists, notExists, pruneNodeForPrunedChild, setOperand, transformExpression

Methods inherited from class Expression

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

Methods inherited from class Object

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

Constructor Details

WhenExp

public WhenExp(Object... operands)

Method Details

shallowCopy

public Expression shallowCopy()

Description copied from class: Expression

Creates a copy of this expression node, without copying children.

Specified by:

shallowCopy in class Expression

getExpressionOperator

protected String getExpressionOperator(int index)

Description copied from class: Expression

Returns the operator printed between the operands, before the operand at the given index.

Specified by:

getExpressionOperator in class Expression

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 AggregateConditionExp

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