com.espertech.esper.epl.spec

Class OuterJoinDesc

java.lang.Object

com.espertech.esper.epl.spec.OuterJoinDesc

All Implemented Interfaces:

MetaDefItem, Serializable

public class OuterJoinDesc
extends Object
implements MetaDefItem, Serializable

Contains the ON-clause criteria in an outer join.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static OuterJoinDesc[]	EMPTY_OUTERJOIN_ARRAY

Constructor Summary

Constructors

Constructor and Description
OuterJoinDesc(OuterJoinType outerJoinType, ExprIdentNode optLeftNode, ExprIdentNode optRightNode, ExprIdentNode[] optAddLeftNode, ExprIdentNode[] optAddRightNode) Ctor.

Method Summary

Modifier and Type	Method and Description
static boolean	consistsOfAllInnerJoins(OuterJoinDesc[] outerJoinDescList)
ExprIdentNode[]	getAdditionalLeftNodes() Returns additional properties in the on-clause, if any, that are connected via logical-and
ExprIdentNode[]	getAdditionalRightNodes() Returns additional properties in the on-clause, if any, that are connected via logical-and
ExprIdentNode	getOptLeftNode() Returns left hand identifier node.
ExprIdentNode	getOptRightNode() Returns right hand identifier node.
OuterJoinType	getOuterJoinType() Returns the type of outer join (left/right/full).
static boolean	hasOnClauses(OuterJoinDesc[] outerJoinDescList)
ExprNode	makeExprNode(ExprEvaluatorContext exprEvaluatorContext) Make an expression node that represents the outer join criteria as specified in the on-clause.
static OuterJoinDesc[]	toArray(Collection<OuterJoinDesc> expressions)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

EMPTY_OUTERJOIN_ARRAY

public static final OuterJoinDesc[] EMPTY_OUTERJOIN_ARRAY

Constructor Detail

OuterJoinDesc

public OuterJoinDesc(OuterJoinType outerJoinType,
                     ExprIdentNode optLeftNode,
                     ExprIdentNode optRightNode,
                     ExprIdentNode[] optAddLeftNode,
                     ExprIdentNode[] optAddRightNode)

Ctor.

Parameters:

outerJoinType - - type of the outer join

optLeftNode - - left hand identifier node

optRightNode - - right hand identifier node

optAddLeftNode - - additional optional left hand identifier nodes for the on-clause in a logical-and

optAddRightNode - - additional optional right hand identifier nodes for the on-clause in a logical-and

Method Detail

getOuterJoinType

public OuterJoinType getOuterJoinType()

Returns the type of outer join (left/right/full).

Returns:

outer join type

getOptLeftNode

public ExprIdentNode getOptLeftNode()

Returns left hand identifier node.

Returns:

left hand

getOptRightNode

public ExprIdentNode getOptRightNode()

Returns right hand identifier node.

Returns:

right hand

getAdditionalLeftNodes

public ExprIdentNode[] getAdditionalLeftNodes()

Returns additional properties in the on-clause, if any, that are connected via logical-and

Returns:

additional properties

getAdditionalRightNodes

public ExprIdentNode[] getAdditionalRightNodes()

Returns additional properties in the on-clause, if any, that are connected via logical-and

Returns:

additional properties

makeExprNode

public ExprNode makeExprNode(ExprEvaluatorContext exprEvaluatorContext)

Make an expression node that represents the outer join criteria as specified in the on-clause.

Parameters:

exprEvaluatorContext - context for expression evalauation

Returns:

expression node for outer join criteria

consistsOfAllInnerJoins

public static boolean consistsOfAllInnerJoins(OuterJoinDesc[] outerJoinDescList)

toArray

public static OuterJoinDesc[] toArray(Collection<OuterJoinDesc> expressions)

hasOnClauses

public static boolean hasOnClauses(OuterJoinDesc[] outerJoinDescList)