Module org.eclipse.persistence.core

Package org.eclipse.persistence.internal.expressions

Class FromAliasExpression

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.FromAliasExpression

All Implemented Interfaces:

Serializable, Cloneable

public class FromAliasExpression
extends QueryKeyExpression

Represents an alias to a item selected by a from clause sub-select.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected ClassDescriptor	containingDescriptor
protected ReportItem	item

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
FromAliasExpression()
FromAliasExpression(String name, Expression base)

Method Summary

Modifier and Type	Method	Description
String	descriptionOfNodeType()	INTERNAL: Used for debug printing.
ClassDescriptor	getContainingDescriptor()	INTERNAL: If the alias is for a query key item, then return its descriptor.
ReportItem	getItem()	INTERNAL: Return the report item that this is an alias for.
QueryKey	getQueryKeyOrNull()	INTERNAL: If a descriptor cannot be found, then return null.

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

additionalExpressionCriteria, additionalExpressionCriteriaMap, aliasForTable, checkJoinForSubSelectWithParent, computeHashCode, doQueryToManyRelationship, equals, getAdditionalTables, getAliasedField, getAliasedTable, getField, getFields, getFieldValue, getLeafDescriptor, getLeafMapping, getMapKeyDescriptor, getMapping, getMappingFromQueryKey, getName, getNestedAttributeName, getOwnedTables, getReferenceTable, getRelationTable, getSelectionFields, getSourceTable, index, initializeAliasedField, isAttribute, isDirectCollection, isManyToMany, isMapKeyObjectRelationship, isOneToMany, isOneToOne, isQueryKeyExpression, mappingCriteria, normalize, normalize, postCopyIn, printJava, printSQL, rebuildOn, rebuildOn, resetCache, shouldQueryToManyRelationship, treat, twistedForBaseAndContext, validateNode, 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, 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, allOf, and, any, any, any, any, any, any, any, any, any, any, any, any, anyOf, anyOfAllowingNone, 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, 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, localDate, localDateTime, localTime, 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, 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

Field Details

item

protected ReportItem item

containingDescriptor

protected ClassDescriptor containingDescriptor

Constructor Details

FromAliasExpression

public FromAliasExpression()

FromAliasExpression

public FromAliasExpression(String name,
 Expression base)

Method Details

descriptionOfNodeType

public String descriptionOfNodeType()

INTERNAL: Used for debug printing.

Overrides:

descriptionOfNodeType in class QueryKeyExpression

getQueryKeyOrNull

public QueryKey getQueryKeyOrNull()

INTERNAL: If a descriptor cannot be found, then return null.

Overrides:

getQueryKeyOrNull in class QueryKeyExpression

getContainingDescriptor

public ClassDescriptor getContainingDescriptor()

INTERNAL: If the alias is for a query key item, then return its descriptor. If it is for a function, then it has no descriptor.

Overrides:

getContainingDescriptor in class DataExpression

getItem

public ReportItem getItem()

INTERNAL: Return the report item that this is an alias for.