wt.eff
Class QueryHelper

java.lang.Object
  wt.eff.QueryHelper

public class QueryHelper

extends Object

Field Summary

(package private) static String	AUTHORIZED_BY
(package private) static String	BID
(package private) static String	CONTEXT
(package private) static String	CREATION
(package private) static String	DELETION
(package private) static String	MODIFIER
(package private) static String	OID
private static String	OR_KEY
(package private) static String	PRED
(package private) static String	TARGET
(package private) static String	TYPE

Constructor Summary

QueryHelper()

Method Summary

static WhereExpression	newCurrentEffCondition() Returns a condition selecting an Eff if it is current (i.e., it has not been deleted).
(package private) static WhereExpression	newDifferentCreationCondition(FromClause fc, int effIdx)
private static QuerySpec	newRelevantEffSubSelect(FromClause fc, int effIdx) Returns a new QuerySpec corresponding to a basic sub select of Eff objects to be used in an EXISTS expression.

Methods inherited from class java.lang.Object

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

Field Detail

OR_KEY

private static final String OR_KEY

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Constant Field Values

OID

static final String OID

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Constant Field Values

BID

static final String BID

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Constant Field Values

PRED

static final String PRED

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Constant Field Values

TARGET

static final String TARGET

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Constant Field Values

CONTEXT

static final String CONTEXT

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Constant Field Values

TYPE

static final String TYPE

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Constant Field Values

CREATION

static final String CREATION

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Constant Field Values

DELETION

static final String DELETION

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Constant Field Values

MODIFIER

static final String MODIFIER

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Constant Field Values

AUTHORIZED_BY

static final String AUTHORIZED_BY

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Constant Field Values

Constructor Detail

QueryHelper

public QueryHelper()

Method Detail

newRelevantEffSubSelect

private static QuerySpec newRelevantEffSubSelect(FromClause fc,
                                                 int effIdx)
                                          throws QueryException

Returns a new QuerySpec corresponding to a basic sub select of Eff objects to be used in an EXISTS expression. The OID of the Eff objects corresponding to the same type/version/context as the current row of the outer query are selected.

Throws:

QueryException

newCurrentEffCondition

public static WhereExpression newCurrentEffCondition()
                                              throws QueryException

Returns a condition selecting an Eff if it is current (i.e., it has not been deleted).

Throws:

QueryException

newDifferentCreationCondition

static WhereExpression newDifferentCreationCondition(FromClause fc,
                                                     int effIdx)
                                              throws QueryException

Throws:

QueryException