Package org.eclipse.persistence.internal.expressions

Class ManualQueryKeyExpression

java.lang.Object

org.eclipse.persistence.expressions.Expression

org.eclipse.persistence.internal.expressions.BaseExpression

org.eclipse.persistence.internal.expressions.DataExpression

org.eclipse.persistence.internal.expressions.ObjectExpression

org.eclipse.persistence.internal.expressions.QueryKeyExpression

org.eclipse.persistence.internal.expressions.ManualQueryKeyExpression

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

public class ManualQueryKeyExpression
extends QueryKeyExpression

This class represents a "query key" that isn't really there in the descriptors. For example, I could use this to create an 'employee' query key from an 'address' node even if addresses don't know their employee. It's called manual, because I will have to provide the relevant join criteria myself (normally based on a reverse relationship. Motivated by batch reading.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.eclipse.persistence.internal.expressions.QueryKeyExpression

aliasedField, hasMapping, hasQueryKey, index, isAttributeExpression, isClonedForSubQuery, mapping, name, queryKey, shouldQueryToManyRelationship

Fields inherited from class org.eclipse.persistence.internal.expressions.ObjectExpression

castClass, derivedExpressions, descriptor, hasBeenAliased, joinSource, onClause, shouldUseOuterJoin, shouldUseOuterJoinForMultitableInheritance

Fields inherited from class org.eclipse.persistence.internal.expressions.DataExpression

asOfClause, derivedFields, derivedTables, hasBeenNormalized, tableAliases

Fields inherited from class org.eclipse.persistence.internal.expressions.BaseExpression

baseExpression, builder

Fields inherited from class org.eclipse.persistence.expressions.Expression

currentAlias, hashCode, lastTable, selectIfOrderedBy, shouldUseUpperCaseForIgnoreCase

Constructor Summary

Constructors

Constructor	Description
ManualQueryKeyExpression()
ManualQueryKeyExpression(java.lang.String impliedRelationshipName, Expression base)
ManualQueryKeyExpression(java.lang.String impliedRelationshipName, Expression base, ClassDescriptor descriptor)

Method Summary

Modifier and Type	Method	Description
java.lang.String	descriptionOfNodeType()	INTERNAL: Used for debug printing.
boolean	equals(java.lang.Object object)	INTERNAL: Return if the expression is equal to the other.
java.util.List<DatabaseTable>	getOwnedTables()	INTERNAL: If we ever get in the circumstance of a manual query key to an aggregate, then we can assume that the owner of that aggregate isn't participating (and even if it is, we can't know which node it is, so *DO* use the aggregate's parents tables
QueryKey	getQueryKeyOrNull()
boolean	isAttribute()	INTERNAL: We can never be an attribute, we're always a join
Expression	mappingCriteria(Expression base)
Expression	rebuildOn(Expression newBase)	INTERNAL: This expression is built on a different base than the one we want.
Expression	twistedForBaseAndContext(Expression newBase, Expression context, Expression oldBase)	INTERNAL: Rebuild myself against the base, with the values of parameters supplied by the context expression.
void	validateNode()	Do any required validation for this node.

Methods inherited from class org.eclipse.persistence.internal.expressions.QueryKeyExpression

additionalExpressionCriteria, additionalExpressionCriteriaMap, aliasForTable, checkJoinForSubSelectWithParent, computeHashCode, doQueryToManyRelationship, getAdditionalTables, getAliasedField, getAliasedTable, getField, getFields, getFieldValue, getLeafDescriptor, getLeafMapping, getMapKeyDescriptor, getMapping, getMappingFromQueryKey, getName, getNestedAttributeName, getReferenceTable, getRelationTable, getSelectionFields, getSourceTable, index, initializeAliasedField, isDirectCollection, isManyToMany, isMapKeyObjectRelationship, isOneToMany, isOneToOne, isQueryKeyExpression, normalize, normalize, postCopyIn, printJava, printSQL, rebuildOn, resetCache, shouldQueryToManyRelationship, treat, valueFromObject, valuesFromCollection, writeDescriptionOn

Methods inherited from class org.eclipse.persistence.internal.expressions.ObjectExpression

addDerivedExpression, anyOf, anyOfAllowingNone, assignTableAliasesStartingAt, clearAliases, convertToCastDescriptor, copyDerivedExpressions, derivedExpressionNamed, derivedManualExpressionNamed, doNotUseOuterJoin, doUseOuterJoin, existingDerivedExpressionNamed, get, getAllowingNull, getCastClass, getDescriptor, getFirstNonAggregateExpressionAfterExpressionBuilder, getForUpdateOfFields, getJoinSource, getManualQueryKey, getOnClause, getOuterJoinExpIndex, hasBeenAliased, hasDerivedExpressions, isDowncast, isObjectExpression, isTreatUsed, isUsingOuterJoinForMultitableInheritance, join, leftJoin, newDerivedExpressionNamed, newManualDerivedExpressionNamed, postCopyIn, setCastClass, setJoinSource, setOnClause, setOuterJoinExpIndex, setShouldUseOuterJoinForMultitableInheritance, shouldUseOuterJoin, shouldUseOuterJoinForMultitableInheritance, type, writeForUpdateOfFields

Methods inherited from class org.eclipse.persistence.internal.expressions.DataExpression

addDerivedField, addDerivedTable, asOf, assignAlias, assignAlias, copyCollection, existingDerivedField, existingDerivedTable, getAlias, getAsOfClause, getContainingDescriptor, getField, getField, getTable, getTable, getTableAliases, hasAsOfClause, hasBeenNormalized, hasDerivedFields, hasDerivedTables, isDataExpression, iterateOn, newDerivedField, newDerivedTable, setHasBeenNormalized, setTableAliases, tableAliasesDescription, writeSubexpressionsTo

Methods inherited from class org.eclipse.persistence.internal.expressions.BaseExpression

getBaseExpression, getBuilder, resetPlaceHolderBuilder, setBaseExpression, shallowClone

Methods inherited from class org.eclipse.persistence.expressions.Expression

addDate, addDate, addMonths, addMonths, alias, all, all, all, all, all, all, all, all, all, all, all, all, all, allOf, and, any, any, any, any, any, any, any, any, any, any, any, any, any, anyOf, anyOfAllowingNone, as, as, ascending, asciiValue, average, between, between, between, between, between, between, between, between, between, caseConditionStatement, caseConditionStatement, caseStatement, caseStatement, cast, clone, cloneUsing, coalesce, coalesce, concat, containsAllKeyWords, containsAnyKeyWords, containsSubstring, containsSubstring, containsSubstringIgnoringCase, containsSubstringIgnoringCase, convertNodeToUseOuterJoin, convertToUseOuterJoin, copiedVersionFrom, count, create, create, createWithBaseLast, currentDate, currentDateDate, currentTime, currentTimeStamp, dateDifference, dateDifference, dateName, datePart, dateToString, decode, descending, difference, distinct, doesConform, doesConform, equal, equal, equal, equal, equal, equal, equal, equal, equal, equal, equalOuterJoin, equalOuterJoin, equalsIgnoreCase, equalsIgnoreCase, except, except, exceptAll, exceptAll, exists, existsNode, extract, extractFields, extractPrimaryKeyValues, extractValue, extractValues, extractXml, from, fromConstant, fromLiteral, get, getAsOfClauseRecursively, getClonedField, getFunction, getFunction, getFunction, getFunction, getFunction, getFunctionWithArguments, getFunctionWithArguments, getNumberVal, getOperator, getOperator, getParameter, getParameter, getParameter, getProperty, getSelectionFields, getSession, getStringVal, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, greaterThanEqual, greaterThanEqual, greaterThanEqual, greaterThanEqual, greaterThanEqual, greaterThanEqual, greaterThanEqual, greaterThanEqual, greaterThanEqual, greaterThanEqual, hashCode, hexToRaw, ifNull, in, in, in, in, in, in, in, in, in, in, in, in, indexOf, intersect, intersect, intersectAll, intersectAll, isClassTypeExpression, isCompoundExpression, isConstantExpression, isEmpty, isExpressionBuilder, isFieldExpression, isFragment, isFunctionExpression, isLiteralExpression, isLogicalExpression, isMapEntryExpression, isNull, isParameterExpression, isRelationExpression, isSubSelectExpression, isTableExpression, isTreatExpression, isValueExpression, lastDay, leftPad, leftPad, leftTrim, leftTrim, length, lessThan, lessThan, lessThan, lessThan, lessThan, lessThan, lessThan, lessThan, lessThan, lessThan, lessThanEqual, lessThanEqual, lessThanEqual, lessThanEqual, lessThanEqual, lessThanEqual, lessThanEqual, lessThanEqual, lessThanEqual, lessThanEqual, like, like, like, like, likeIgnoreCase, likeIgnoreCase, literal, locate, locate, locate, mapEntry, mapKey, maximum, minimum, monthsBetween, newTime, nextDay, noneOf, not, notBetween, notBetween, notBetween, notBetween, notBetween, notBetween, notBetween, notBetween, notBetween, notEmpty, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual, notExists, notIn, notIn, notIn, notIn, notIn, notIn, notIn, notIn, notIn, notIn, notIn, notIn, notLike, notLike, notLike, notLike, notNull, nullIf, nullsFirst, nullsLast, operator, or, performOperator, postfixSQL, prefixSQL, ref, regexp, regexp, registerIn, replace, replicate, replicate, reverse, right, right, rightPad, rightPad, rightTrim, rightTrim, roundDate, selectIfOrderedBy, setLocalBase, setSelectIfOrderedBy, size, size, some, some, some, some, some, some, some, some, some, some, some, some, some, sql, standardDeviation, subQuery, substring, substring, substring, substring, sum, toChar, toChar, toCharacter, toDate, toLowerCase, toNumber, toString, toString, toUpperCase, toUppercaseCasedWords, translate, trim, trim, truncateDate, twist, union, union, unionAll, unionAll, value, value, value, value, value, value, value, value, value, value, valueFromObject, variance, writeAlias, writeField, writeFields

Methods inherited from class java.lang.Object

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

Constructor Detail

ManualQueryKeyExpression

public ManualQueryKeyExpression()

ManualQueryKeyExpression

public ManualQueryKeyExpression(java.lang.String impliedRelationshipName,
                                Expression base)

ManualQueryKeyExpression

public ManualQueryKeyExpression(java.lang.String impliedRelationshipName,
                                Expression base,
                                ClassDescriptor descriptor)

Method Detail

equals

public boolean equals(java.lang.Object object)

INTERNAL: Return if the expression is equal to the other. This is used to allow dynamic expression's SQL to be cached.

Overrides:

equals in class QueryKeyExpression

descriptionOfNodeType

public java.lang.String descriptionOfNodeType()

INTERNAL: Used for debug printing.

Overrides:

descriptionOfNodeType in class QueryKeyExpression

getOwnedTables

public java.util.List<DatabaseTable> getOwnedTables()

INTERNAL: If we ever get in the circumstance of a manual query key to an aggregate, then we can assume that the owner of that aggregate isn't participating (and even if it is, we can't know which node it is, so *DO* use the aggregate's parents tables

Overrides:

getOwnedTables in class QueryKeyExpression

getQueryKeyOrNull

public QueryKey getQueryKeyOrNull()

Overrides:

getQueryKeyOrNull in class QueryKeyExpression

isAttribute

public boolean isAttribute()

INTERNAL: We can never be an attribute, we're always a join

Overrides:

isAttribute in class QueryKeyExpression

mappingCriteria

public Expression mappingCriteria(Expression base)

Overrides:

mappingCriteria in class QueryKeyExpression

rebuildOn

public Expression rebuildOn(Expression newBase)

INTERNAL: This expression is built on a different base than the one we want. Rebuild it and return the root of the new tree

Overrides:

rebuildOn in class QueryKeyExpression

See Also:

Expression.cloneUsing(Expression newBase)

twistedForBaseAndContext

public Expression twistedForBaseAndContext(Expression newBase,
                                           Expression context,
                                           Expression oldBase)

INTERNAL: Rebuild myself against the base, with the values of parameters supplied by the context expression. This is used for transforming a standalone expression (e.g. the join criteria of a mapping) into part of some larger expression. You normally would not call this directly, instead calling twist See the comment there for more details"

Overrides:

twistedForBaseAndContext in class QueryKeyExpression

validateNode

public void validateNode()

Do any required validation for this node. Throw an exception if it's incorrect.

Overrides:

validateNode in class QueryKeyExpression