oracle.toplink.essentials.internal.expressions

Class ConstantExpression

java.lang.Object

oracle.toplink.essentials.expressions.Expression

oracle.toplink.essentials.internal.expressions.ConstantExpression

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

public class ConstantExpression
extends Expression

Used for wrapping constant values.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected Expression	localBase
protected java.lang.Object	value

Fields inherited from class oracle.toplink.essentials.expressions.Expression

currentAlias, lastTable, selectIfOrderedBy

Constructor Summary

Constructors

Constructor and Description
ConstantExpression()
ConstantExpression(java.lang.Object newValue, Expression baseExpression)

Method Summary

Modifier and Type	Method and Description
java.lang.String	descriptionOfNodeType() INTERNAL: Used for debug printing.
ExpressionBuilder	getBuilder() Return the expression builder which is the ultimate base of this expression, or null if there isn't one (shouldn't happen if we start from a root)
protected Expression	getLocalBase()
java.lang.Object	getValue()
boolean	isConstantExpression() INTERNAL:
boolean	isValueExpression() INTERNAL:
protected void	postCopyIn(java.util.Dictionary alreadyDone) INTERNAL: Used for cloning.
void	printJava(ExpressionJavaPrinter printer) INTERNAL: Print java for project class generation
void	printSQL(ExpressionSQLPrinter printer) INTERNAL: Print SQL onto the stream, using the ExpressionPrinter for context
void	printSQLWithoutConversion(ExpressionSQLPrinter printer) INTERNAL: Print SQL, this is called from functions, so must not be converted through the mapping.
Expression	rebuildOn(Expression newBase) INTERNAL: This expression is built on a different base than the one we want.
void	setLocalBase(Expression e) INTERNAL: Set the local base expression, ie the one on the other side of the operator Most types will ignore this, since they don't need it.
Expression	twistedForBaseAndContext(Expression newBase, Expression context) INTERNAL: Rebuild myself against the base, with the values of parameters supplied by the context expression.
java.lang.Object	valueFromObject(java.lang.Object object, AbstractSession session, AbstractRecord translationRow, InMemoryQueryIndirectionPolicy valueHolderPolicy, boolean isObjectUnregistered) INTERNAL: Return the value for in memory comparison.
void	writeDescriptionOn(java.io.BufferedWriter writer) INTERNAL: Used to print a debug form of the expression tree.
void	writeFields(ExpressionSQLPrinter printer, java.util.Vector newFields, SQLSelectStatement statement) INTERNAL: Append the constant value into the printer

Methods inherited from class oracle.toplink.essentials.expressions.Expression

addDate, addDate, addMonths, addMonths, aliasForTable, 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, ascending, asciiValue, assignAlias, assignTableAliasesStartingAt, average, between, between, between, between, between, between, between, between, between, caseStatement, clone, cloneUsing, 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, detectExpression, difference, distinct, doesConform, doesConform, equal, equal, equal, equal, equal, equal, equal, equal, equal, equal, equalOuterJoin, equalOuterJoin, equalsIgnoreCase, equalsIgnoreCase, exists, existsNode, extract, extractPrimaryKeyValues, extractValue, from, fromConstant, fromLiteral, get, get, getAllowingNull, getAllowingNull, getClonedField, getField, getField, getFields, getFieldValue, getFunction, getFunction, getFunction, getFunction, getFunctionWithArguments, getName, getNumberVal, getOperator, getOperator, getOwnedTables, getParameter, getParameter, getParameter, getSession, getStringVal, getTable, getTable, getTableAliases, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, greaterThanEqual, greaterThanEqual, greaterThanEqual, greaterThanEqual, greaterThanEqual, greaterThanEqual, greaterThanEqual, greaterThanEqual, greaterThanEqual, greaterThanEqual, hasAsOfClause, hasBeenAliased, hexToRaw, ifNull, in, in, in, in, in, in, in, in, in, in, in, in, indexOf, isCompoundExpression, isDataExpression, isEmpty, isExpressionBuilder, isFieldExpression, isFragment, isFunctionExpression, isLiteralExpression, isLogicalExpression, isNull, isObjectExpression, isParameterExpression, isQueryKeyExpression, isRelationExpression, isTableExpression, iterateOn, 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, maximum, minimum, monthsBetween, newTime, nextDay, noneOf, normalize, 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, notNull, or, performOperator, postfixSQL, prefixSQL, ref, registerIn, replace, replicate, replicate, resetCache, reverse, right, right, rightPad, rightPad, rightTrim, rightTrim, roundDate, selectIfOrderedBy, setSelectIfOrderedBy, shallowClone, size, some, some, some, some, some, some, some, some, some, some, some, some, standardDeviation, subQuery, substring, substring, sum, toChar, toChar, toCharacter, toDate, toLowerCase, toNumber, toString, toString, toUpperCase, toUppercaseCasedWords, translate, trim, trim, truncateDate, twist, validateNode, value, value, value, value, value, value, value, value, value, value, valueFromObject, variance, writeField, writeSubexpressionsTo

Methods inherited from class java.lang.Object

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

Field Detail

value

protected java.lang.Object value

localBase

protected Expression localBase

Constructor Detail

ConstantExpression

public ConstantExpression()

ConstantExpression

public ConstantExpression(java.lang.Object newValue,
                          Expression baseExpression)

Method Detail

descriptionOfNodeType

public java.lang.String descriptionOfNodeType()

INTERNAL: Used for debug printing.

Overrides:

descriptionOfNodeType in class Expression

getBuilder

public ExpressionBuilder getBuilder()

Return the expression builder which is the ultimate base of this expression, or null if there isn't one (shouldn't happen if we start from a root)

Specified by:

getBuilder in class Expression

getLocalBase

protected Expression getLocalBase()

getValue

public java.lang.Object getValue()

isConstantExpression

public boolean isConstantExpression()

Description copied from class: Expression

INTERNAL:

Overrides:

isConstantExpression in class Expression

isValueExpression

public boolean isValueExpression()

INTERNAL:

Overrides:

isValueExpression in class Expression

postCopyIn

protected void postCopyIn(java.util.Dictionary alreadyDone)

INTERNAL: Used for cloning.

Overrides:

postCopyIn in class Expression

printSQL

public void printSQL(ExpressionSQLPrinter printer)

INTERNAL: Print SQL onto the stream, using the ExpressionPrinter for context

Specified by:

printSQL in class Expression

printSQLWithoutConversion

public void printSQLWithoutConversion(ExpressionSQLPrinter printer)

INTERNAL: Print SQL, this is called from functions, so must not be converted through the mapping.

Overrides:

printSQLWithoutConversion in class Expression

printJava

public void printJava(ExpressionJavaPrinter printer)

INTERNAL: Print java for project class generation

Overrides:

printJava in class Expression

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

Specified by:

rebuildOn in class Expression

See Also:

Expression.cloneUsing(Expression newBase)

setLocalBase

public void setLocalBase(Expression e)

Description copied from class: Expression

INTERNAL: Set the local base expression, ie the one on the other side of the operator Most types will ignore this, since they don't need it.

Overrides:

setLocalBase in class Expression

twistedForBaseAndContext

public Expression twistedForBaseAndContext(Expression newBase,
                                           Expression context)

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

valueFromObject

public java.lang.Object valueFromObject(java.lang.Object object,
                                        AbstractSession session,
                                        AbstractRecord translationRow,
                                        InMemoryQueryIndirectionPolicy valueHolderPolicy,
                                        boolean isObjectUnregistered)

INTERNAL: Return the value for in memory comparison. This is only valid for valueable expressions.

Overrides:

valueFromObject in class Expression

writeDescriptionOn

public void writeDescriptionOn(java.io.BufferedWriter writer)
                        throws java.io.IOException

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

Overrides:

writeDescriptionOn in class Expression

Throws:

java.io.IOException

writeFields

public void writeFields(ExpressionSQLPrinter printer,
                        java.util.Vector newFields,
                        SQLSelectStatement statement)

INTERNAL: Append the constant value into the printer

Overrides:

writeFields in class Expression