Module org.eclipse.persistence.core

Package org.eclipse.persistence.internal.expressions

Class ClassTypeExpression

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.ClassTypeExpression

All Implemented Interfaces:

Serializable, Cloneable

public class ClassTypeExpression
extends DataExpression

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected DatabaseField	aliasedField	Cache the aliased field.
protected DatabaseField	field	Cache the aliased field.

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
ClassTypeExpression()
ClassTypeExpression(Expression base)

Method Summary

Modifier and Type	Method	Description
String	descriptionOfNodeType()	INTERNAL: Used for debug printing.
DatabaseField	getAliasedField()	INTERNAL: Return the field appropriately aliased
protected DatabaseTable	getAliasedTable()	Return the alias for our table
ClassDescriptor	getContainingDescriptor()	INTERNAL: Like QueryKeyExpression, return the descriptor for the class type used, null if one can't be determined yet.
ClassDescriptor	getContainingDescriptor(ObjectLevelReadQuery query)	INTERNAL: Return the descriptor for the base expression.
DatabaseField	getField()	INTERNAL:
Vector	getFields()	INTERNAL: Return all the fields
Object	getFieldValue(Object objectValue, AbstractSession session)	INTERNAL: Transform the object-level value into a database-level value objectValue is a Class or collection of Class objects and the returned value is the database representation Example: ObjectValue=LargeProject returns "L".
protected void	initializeAliasedField()	INTERNAL: Alias the database field for our current environment
boolean	isAttribute()	INTERNAL:
boolean	isClassTypeExpression()	INTERNAL:
Expression	normalize(ExpressionNormalizer normalizer, Vector foreignKeyJoinPointer)	INTERNAL: For CR#2456 if this is part of an objExp.equal(objExp), do not need to add additional expressions to normalizer both times, and the foreign key join replaces the equal expression.
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.
Object	typeValueFromObject(Object object, AbstractSession session)	INTERNAL This method returns the inheritance field value for an object to conform in an in-memory query.
void	validateNode()	INTERNAL: Do any required validation for this node.
Object	valueFromObject(Object object, AbstractSession session, AbstractRecord translationRow, int valueHolderPolicy, boolean isObjectUnregistered)	INTERNAL: Return the value for in memory comparison.
void	writeDescriptionOn(BufferedWriter writer)	INTERNAL: Used to print a debug form of the expression tree.

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

addDerivedField, addDerivedTable, aliasForTable, asOf, assignAlias, assignAlias, clearAliases, copyCollection, equals, existingDerivedField, existingDerivedTable, getAlias, getAsOfClause, getDescriptor, getField, getField, getMapping, getQueryKeyOrNull, getTable, getTable, getTableAliases, hasAsOfClause, hasBeenAliased, hasBeenNormalized, hasDerivedFields, hasDerivedTables, isDataExpression, iterateOn, newDerivedField, newDerivedTable, normalize, postCopyIn, printSQL, 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, anyOf, anyOfAllowingNone, anyOfAllowingNone, as, ascending, asciiValue, assignTableAliasesStartingAt, average, between, between, between, between, between, between, between, between, between, caseConditionStatement, caseConditionStatement, caseStatement, caseStatement, cast, clone, cloneUsing, coalesce, coalesce, computeHashCode, 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, get, getAllowingNull, getAsOfClauseRecursively, getClonedField, getFunction, getFunction, getFunction, getFunction, getFunctionWithArguments, getLeafDescriptor, getLeafMapping, getName, getNumberVal, getOperator, getOperator, getOwnedTables, getParameter, getParameter, getParameter, getProperty, getSelectionFields, 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, index, indexOf, intersect, intersect, intersectAll, intersectAll, isCompoundExpression, isConstantExpression, isEmpty, isExpressionBuilder, isFieldExpression, isFragment, isFunctionExpression, isLiteralExpression, isLogicalExpression, isMapEntryExpression, isNull, isObjectExpression, isParameterExpression, isQueryKeyExpression, isRelationExpression, isSubSelectExpression, isTableExpression, isTreatExpression, isValueExpression, join, lastDay, leftJoin, 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, printJava, ref, regexp, regexp, registerIn, replace, replicate, replicate, resetCache, 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, treat, trim, trim, truncateDate, twist, type, 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

field

protected DatabaseField field

Cache the aliased field. Only applies to attributes.

aliasedField

protected DatabaseField aliasedField

Cache the aliased field. Only applies to attributes.

Constructor Details

ClassTypeExpression

public ClassTypeExpression(Expression base)

ClassTypeExpression

public ClassTypeExpression()

Method Details

descriptionOfNodeType

public String descriptionOfNodeType()

INTERNAL: Used for debug printing.

Overrides:

descriptionOfNodeType in class Expression

rebuildOn

public Expression rebuildOn(Expression newBase)

Description copied from class: Expression

INTERNAL: This expression is built on a different base than the one we want. Rebuild it and return the root of the new tree If receiver is a complex expression, use cloneUsing(newBase) instead.

Specified by:

rebuildOn in class Expression

See Also:

• Expression.cloneUsing(Expression newBase)

typeValueFromObject

public Object typeValueFromObject(Object object,
 AbstractSession session)

INTERNAL This method returns the inheritance field value for an object to conform in an in-memory query. Similar to getFieldValue, but deals with an instance rather than a Class object directly

validateNode

public void validateNode()

Description copied from class: Expression

INTERNAL: Do any required validation for this node. Throw an exception for any incorrect constructs.

Overrides:

validateNode in class Expression

valueFromObject

public Object valueFromObject(Object object,
 AbstractSession session,
 AbstractRecord translationRow,
 int valueHolderPolicy,
 boolean isObjectUnregistered)

INTERNAL: Return the value for in memory comparison. This is only valid for value expressions. Pulled from QueryKeyExpression valueFromObject

Overrides:

valueFromObject in class Expression

Parameters:

isObjectUnregistered - true if object possibly not a clone, but is being conformed against the unit of work cache.

writeDescriptionOn

public void writeDescriptionOn(BufferedWriter writer)
                        throws IOException

INTERNAL: Used to print a debug form of the expression tree.

Overrides:

writeDescriptionOn in class Expression

Throws:

IOException

getField

public DatabaseField getField()

INTERNAL:

Overrides:

getField in class DataExpression

getFieldValue

public Object getFieldValue(Object objectValue,
 AbstractSession session)

INTERNAL: Transform the object-level value into a database-level value objectValue is a Class or collection of Class objects and the returned value is the database representation Example: ObjectValue=LargeProject returns "L".

Overrides:

getFieldValue in class Expression

getContainingDescriptor

public ClassDescriptor getContainingDescriptor()

INTERNAL: Like QueryKeyExpression, return the descriptor for the class type used, null if one can't be determined yet. Should only be called when a session is already set.

Overrides:

getContainingDescriptor in class DataExpression

getContainingDescriptor

public ClassDescriptor getContainingDescriptor(ObjectLevelReadQuery query)

INTERNAL: Return the descriptor for the base expression. This is used in ReportItem when building the return value (a class), as none of the expressions will have a session.

isClassTypeExpression

public boolean isClassTypeExpression()

Description copied from class: Expression

INTERNAL:

Overrides:

isClassTypeExpression in class Expression

isAttribute

public boolean isAttribute()

INTERNAL:

Overrides:

isAttribute in class DataExpression

normalize

public Expression normalize(ExpressionNormalizer normalizer,
 Vector foreignKeyJoinPointer)

INTERNAL: For CR#2456 if this is part of an objExp.equal(objExp), do not need to add additional expressions to normalizer both times, and the foreign key join replaces the equal expression.

initializeAliasedField

protected void initializeAliasedField()

INTERNAL: Alias the database field for our current environment

getAliasedField

public DatabaseField getAliasedField()

INTERNAL: Return the field appropriately aliased

Overrides:

getAliasedField in class DataExpression

getAliasedTable

protected DatabaseTable getAliasedTable()

Return the alias for our table

getFields

public Vector getFields()

INTERNAL: Return all the fields

Overrides:

getFields in class Expression

twistedForBaseAndContext

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

Description copied from class: Expression

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 Expression